Rule
Dark Skies
Dark Skies Forecast for Skógafoss, Iceland
Skógafoss, South, Iceland
Skógafoss drops in a broad curtain from Iceland’s former sea cliffs. Persistent spray creates frequent rainbows in direct sun and coats the dark rock with stark ice detail during freezing weather.
1 matching opportunities in the 14-day forecast.
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Atlantic/Reykjavik
First upcoming window
Pristine Dark Skies (pristine)
Skógafoss
Fri, Oct 9 · 20:57–04:00 · 7h window
Medium confidence
52%
🌛Moon Altitude-33--15.5°
☁️Total Cloud Coverage0-17%
72-hour requirements breakdown
When available, this detailed table covers only the stated 72-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the full 14-day forecast period, so this table does not explain that entire period. Times shown in Atlantic/Reykjavik.
Most common blockers
Ranked across the 91-hour forecast horizon, not the full opportunity period.
- Total Cloud Coverage79% of hours
- Precipitation Chance67% of hours
- Astronomical Night60% of hours
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time Atlantic/Reykjavik | Astronomical Night Any | Total Cloud Coverage ≤ 20.0% | Visibility ≥ 12000.0m | Precipitation Chance ≤ 10.0% | Moon Illumination OR1·B1≤ 35.0% | Moon Altitude OR1·B2≤ 10.0° |
|---|---|---|---|---|---|---|
| Wed, Oct 7 | ||||||
| Rule fails. 23:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 21540m. Meets requirement | Precipitation Chance: 1%. Meets requirement | Moon Illumination: 12%. Meets requirement | Moon Altitude: -20°. Meets requirement |
| Thu, Oct 8 | ||||||
| Rule fails. 24:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 85%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 0%. Meets requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -20°. Meets requirement |
| Rule fails. 01:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 0%. Meets requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -17°. Meets requirement |
| Rule fails. 02:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 30860m. Meets requirement | Precipitation Chance: 0%. Meets requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -14°. Meets requirement |
| Rule fails. 03:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 4%. Meets requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -8.9°. Meets requirement |
| Rule fails. 04:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 27%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -3.3°. Meets requirement |
| Rule fails. 05:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 58%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 2.8°. Meets requirement |
| Rule fails. 06:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 12360m. Meets requirement | Precipitation Chance: 82%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 9°. Meets requirement |
| Rule fails. 07:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 16120m. Meets requirement | Precipitation Chance: 93%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 15°. Misses requirement |
| Rule fails. 08:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 17220m. Meets requirement | Precipitation Chance: 98%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 20°. Misses requirement |
| Rule fails. 09:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 15140m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 25°. Misses requirement |
| Rule fails. 10:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 3100m. Misses requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 28°. Misses requirement |
| Rule fails. 11:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 8060m. Misses requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 29°. Misses requirement |
| Rule fails. 12:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 14660m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 29°. Misses requirement |
| Rule fails. 13:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 11240m. Misses requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 27°. Misses requirement |
| Rule fails. 14:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 17840m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 23°. Misses requirement |
| Rule fails. 15:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 99%. Misses requirement | Visibility: 19260m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 18°. Misses requirement |
| Rule fails. 16:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 12°. Misses requirement |
| Rule fails. 17:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: 5.2°. Meets requirement |
| Rule fails. 18:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -1.5°. Meets requirement |
| Rule fails. 19:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 36040m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -8°. Meets requirement |
| Rule fails. 20:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 6960m. Misses requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -14°. Meets requirement |
| Rule fails. 21:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 100%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -19°. Meets requirement |
| Rule fails. 22:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 16360m. Meets requirement | Precipitation Chance: 92%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -23°. Meets requirement |
| Rule fails. 23:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 28960m. Meets requirement | Precipitation Chance: 80%. Misses requirement | Moon Illumination: 5.3%. Meets requirement | Moon Altitude: -26°. Meets requirement |
| Fri, Oct 9 | ||||||
| Rule fails. 24:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 71%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -27°. Meets requirement |
| Rule fails. 01:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 17100m. Meets requirement | Precipitation Chance: 68%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -26°. Meets requirement |
| Rule fails. 02:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 11960m. Misses requirement | Precipitation Chance: 68%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -23°. Meets requirement |
| Rule fails. 03:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 3280m. Misses requirement | Precipitation Chance: 65%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -19°. Meets requirement |
| Rule fails. 04:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 2860m. Misses requirement | Precipitation Chance: 58%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -14°. Meets requirement |
| Rule fails. 05:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 87%. Misses requirement | Visibility: 12620m. Meets requirement | Precipitation Chance: 48%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -7.6°. Meets requirement |
| Rule fails. 06:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 19760m. Meets requirement | Precipitation Chance: 39%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -1.4°. Meets requirement |
| Rule fails. 07:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 13%. Meets requirement | Visibility: 19820m. Meets requirement | Precipitation Chance: 29%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 4.7°. Meets requirement |
| Rule fails. 08:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 53%. Misses requirement | Visibility: 23480m. Meets requirement | Precipitation Chance: 19%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 11°. Misses requirement |
| Rule fails. 09:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 26520m. Meets requirement | Precipitation Chance: 12%. Misses requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 16°. Misses requirement |
| Rule fails. 10:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 23260m. Meets requirement | Precipitation Chance: 8%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 20°. Misses requirement |
| Rule fails. 11:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 99%. Misses requirement | Visibility: 21660m. Meets requirement | Precipitation Chance: 7%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 22°. Misses requirement |
| Rule fails. 12:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 61%. Misses requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 6%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 23°. Misses requirement |
| Rule fails. 13:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 47%. Misses requirement | Visibility: 25520m. Meets requirement | Precipitation Chance: 4%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 22°. Misses requirement |
| Rule fails. 14:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 96%. Misses requirement | Visibility: 43040m. Meets requirement | Precipitation Chance: 3%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 20°. Misses requirement |
| Rule fails. 15:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 2%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 16°. Misses requirement |
| Rule fails. 16:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 1%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 10°. Misses requirement |
| Rule fails. 17:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 32960m. Meets requirement | Precipitation Chance: 0%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: 4.3°. Meets requirement |
| Rule fails. 18:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 29880m. Meets requirement | Precipitation Chance: 0%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -2.2°. Meets requirement |
| Rule fails. 19:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 0%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -8.9°. Meets requirement |
| Rule passes. 20:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 31520m. Meets requirement | Precipitation Chance: 1%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -15°. Meets requirement; alternative branch not needed for this match |
| Rule passes. 21:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 30800m. Meets requirement | Precipitation Chance: 2%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -22°. Meets requirement; alternative branch not needed for this match |
| Rule passes. 22:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 2%. Meets requirement | Visibility: 32060m. Meets requirement | Precipitation Chance: 2%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -27°. Meets requirement; alternative branch not needed for this match |
| Rule passes. 23:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 33120m. Meets requirement | Precipitation Chance: 2%. Meets requirement | Moon Illumination: 1.6%. Meets requirement | Moon Altitude: -30°. Meets requirement; alternative branch not needed for this match |
| Sat, Oct 10 | ||||||
| Rule passes. 24:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 35340m. Meets requirement | Precipitation Chance: 2%. Meets requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -33°. Meets requirement; alternative branch not needed for this match |
| Rule passes. 01:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 50000m. Meets requirement | Precipitation Chance: 2%. Meets requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -33°. Meets requirement; alternative branch not needed for this match |
| Rule passes. 02:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 0%. Meets requirement | Visibility: 33200m. Meets requirement | Precipitation Chance: 2%. Meets requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -31°. Meets requirement; alternative branch not needed for this match |
| Rule passes. 03:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 17%. Meets requirement | Visibility: 26045m. Meets requirement | Precipitation Chance: 4%. Meets requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -28°. Meets requirement; alternative branch not needed for this match |
| Rule fails. 04:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 30%. Misses requirement | Visibility: 25090m. Meets requirement | Precipitation Chance: 10%. Meets requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -23°. Meets requirement |
| Rule fails. 05:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 28%. Misses requirement | Visibility: 12755m. Meets requirement | Precipitation Chance: 17%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -18°. Meets requirement |
| Rule fails. 06:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 34%. Misses requirement | Visibility: 640m. Misses requirement | Precipitation Chance: 24%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -12°. Meets requirement |
| Rule fails. 07:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 20%. Meets requirement | Visibility: 1300m. Misses requirement | Precipitation Chance: 28%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -5.5°. Meets requirement |
| Rule fails. 08:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 41%. Misses requirement | Visibility: 1860m. Misses requirement | Precipitation Chance: 32%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 0.6°. Meets requirement |
| Rule fails. 09:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 22%. Misses requirement | Visibility: 3140m. Misses requirement | Precipitation Chance: 35%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 6.1°. Meets requirement |
| Rule fails. 10:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 38%. Misses requirement | Visibility: 6900m. Misses requirement | Precipitation Chance: 38%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 11°. Misses requirement |
| Rule fails. 11:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 40%. Misses requirement | Visibility: 45780m. Meets requirement | Precipitation Chance: 41%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 14°. Misses requirement |
| Rule fails. 12:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 61%. Misses requirement | Visibility: 45600m. Meets requirement | Precipitation Chance: 45%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 16°. Misses requirement |
| Rule fails. 13:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 99%. Misses requirement | Visibility: 45780m. Meets requirement | Precipitation Chance: 51%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 17°. Misses requirement |
| Rule fails. 14:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 45780m. Meets requirement | Precipitation Chance: 57%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 16°. Misses requirement |
| Rule fails. 15:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 11120m. Misses requirement | Precipitation Chance: 61%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 13°. Misses requirement |
| Rule fails. 16:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 6720m. Misses requirement | Precipitation Chance: 60%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 8.5°. Meets requirement |
| Rule fails. 17:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 6460m. Misses requirement | Precipitation Chance: 55%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: 3.2°. Meets requirement |
| Rule fails. 18:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 2380m. Misses requirement | Precipitation Chance: 51%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -2.9°. Meets requirement |
| Rule fails. 19:00 | Astronomical Night: No. Misses requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 1620m. Misses requirement | Precipitation Chance: 48%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -9.4°. Meets requirement |
| Rule fails. 20:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 1740m. Misses requirement | Precipitation Chance: 44%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -16°. Meets requirement |
| Rule fails. 21:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 1520m. Misses requirement | Precipitation Chance: 41%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -23°. Meets requirement |
| Rule fails. 22:00 | Astronomical Night: Yes. Meets requirement | Total Cloud Coverage: 100%. Misses requirement | Visibility: 1860m. Misses requirement | Precipitation Chance: 38%. Misses requirement | Moon Illumination: 0%. Meets requirement | Moon Altitude: -29°. Meets requirement |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity). For OR groups, only one branch is required, so some OR-branch predicates can be ✕ even in a matching hour.
Supporting forecast inputs
Additional hourly values for interpreting the forecast and any derived scores. See the separate requirements breakdown for rule logic; missing values are unavailable.
| Forecast time (Atlantic/Reykjavik) | Astronomical Night | Moon Altitude | Moon Illumination |
|---|---|---|---|
| Wed, Oct 7, 2026Sunrise · Sunset | |||
| Night | Unavailable | -20° | 12% |
| Thu, Oct 8, 2026Sunrise · Sunset | |||
| Night | Unavailable | -20° | 5.3% |
| Night | Unavailable | -17° | 5.3% |
| Night | Unavailable | -14° | 5.3% |
| Night | Unavailable | -8.9° | 5.3% |
| Night | Unavailable | -3.3° | 5.3% |
| Night | Unavailable | 2.8° | 5.3% |
| Night | Unavailable | 9° | 5.3% |
| Night | Unavailable | 15° | 5.3% |
| Unavailable | 20° | 5.3% | |
| Unavailable | 25° | 5.3% | |
| Unavailable | 28° | 5.3% | |
| Unavailable | 29° | 5.3% | |
| Unavailable | 29° | 5.3% | |
| Unavailable | 27° | 5.3% | |
| Unavailable | 23° | 5.3% | |
| Unavailable | 18° | 5.3% | |
| Unavailable | 12° | 5.3% | |
| Unavailable | 5.2° | 5.3% | |
| Unavailable | -1.5° | 5.3% | |
| Night | Unavailable | -8° | 5.3% |
| Night | Unavailable | -14° | 5.3% |
| Night | Unavailable | -19° | 5.3% |
| Night | Unavailable | -23° | 5.3% |
| Night | Unavailable | -26° | 5.3% |
| Fri, Oct 9, 2026Sunrise · Sunset | |||
| Night | Unavailable | -27° | 1.6% |
| Night | Unavailable | -26° | 1.6% |
| Night | Unavailable | -23° | 1.6% |
| Night | Unavailable | -19° | 1.6% |
| Night | Unavailable | -14° | 1.6% |
| Night | Unavailable | -7.6° | 1.6% |
| Night | Unavailable | -1.4° | 1.6% |
| Night | Unavailable | 4.7° | 1.6% |
| Unavailable | 11° | 1.6% | |
| Unavailable | 16° | 1.6% | |
| Unavailable | 20° | 1.6% | |
| Unavailable | 22° | 1.6% | |
| Unavailable | 23° | 1.6% | |
| Unavailable | 22° | 1.6% | |
| Unavailable | 20° | 1.6% | |
| Unavailable | 16° | 1.6% | |
| Unavailable | 10° | 1.6% | |
| Unavailable | 4.3° | 1.6% | |
| Unavailable | -2.2° | 1.6% | |
| Night | Unavailable | -8.9° | 1.6% |
| Night | Unavailable | -15° | 1.6% |
| Night | Unavailable | -22° | 1.6% |
| Night | Unavailable | -27° | 1.6% |
| Night | Unavailable | -30° | 1.6% |
| Sat, Oct 10, 2026Sunrise · Sunset | |||
| Night | Unavailable | -33° | 0% |
| Night | Unavailable | -33° | 0% |
| Night | Unavailable | -31° | 0% |
| Night | Unavailable | -28° | 0% |
| Night | Unavailable | -23° | 0% |
| Night | Unavailable | -18° | 0% |
| Night | Unavailable | -12° | 0% |
| Night | Unavailable | -5.5° | 0% |
| Unavailable | 0.6° | 0% | |
| Unavailable | 6.1° | 0% | |
| Unavailable | 11° | 0% | |
| Unavailable | 14° | 0% | |
| Unavailable | 16° | 0% | |
| Unavailable | 17° | 0% | |
| Unavailable | 16° | 0% | |
| Unavailable | 13° | 0% | |
| Unavailable | 8.5° | 0% | |
| Unavailable | 3.2° | 0% | |
| Unavailable | -2.9° | 0% | |
| Night | Unavailable | -9.4° | 0% |
| Night | Unavailable | -16° | 0% |
| Night | Unavailable | -23° | 0% |
| Night | Unavailable | -29° | 0% |
How this forecast is evaluated
See which weather signals PhotoWeather uses to identify Dark Skies conditions across Iceland. The requirements and hourly values above show how those signals apply at Skógafoss.
Explore Dark Skies conditions across Iceland →Recorded match history
Completed PhotoWeather forecast matches recorded for this exact rule at Skógafoss during the last 365 days.
Last 30 days
6
recorded matching windows · 64% average confidence
Last 90 days
6
recorded matching windows · 64% average confidence
Last 365 days
21
recorded matching windows · 63% average confidence
Most represented month
February, with 8 of 21 matches recorded in the last 365 days.
These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.
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How this forecast is made
Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.
The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.
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