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Rule Blue Hour

Carvoeiro - Blue Hour - Algarve, Portugal

Carvoeiro, Faro, Portugal

When city lights balance with the deep blue twilight sky

No opportunities right now
Here’s what usually blocks matches

No Blue Hour opportunities in the next 14 days

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Rule requirements (key thresholds)
Blue Hour · Any Blue Hour Quality · ≥ 65.0% Precipitation Chance · ≤ 15.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Blue Hour Quality 97% failing
Blue Hour 92% failing
Precipitation Chance 28% failing

Currently

Real-time conditions
Cloud Cover100%
Moon Altitude57.3°

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Lisbon

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

Algarve's historic coastal towns transform during the blue hour, when their whitewashed architecture and Moorish influences become illuminated against the deepening Atlantic twilight. The warm glow of street lights and restaurants creates a perfect color contrast with the cool blue sky.

Tavira's Roman bridge and church towers reflect in the Gilão River, doubling their visual impact during the calm blue hour when wind typically drops. Faro's old town (Cidade Velha) with its cathedral and surrounding defensive walls becomes a glowing jewel against the darkening sky.

What makes Algarve blue hour special:

  • Moorish architecture - Islamic influence visible in arches, tiles, and whitewashed walls that glow at twilight
  • River reflections - Tavira and Silves offer mirror-calm water during windless blue hours
  • Fishing harbors - Traditional boats and colorful harbors in Olhão and Alvor
  • Coastal village lights - Carvoeiro and Albufeira cascade down cliffs, creating layered light displays

The extended Mediterranean-influenced twilight provides 30-40 minutes of usable blue hour light. Winter blue hours (around 6-7 PM) often feature clearer skies, while summer (9-10 PM) offers warmer ambient temperatures for comfortable shooting. Arrive early to scout compositions—the transition from golden hour to blue hour happens quickly.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Lisbon
Blue Hour
Any
Blue Hour Quality
≥ 65.0%
Precipitation Chance
≤ 15.0%
Sat, Feb 21
19:0043%0%
20:0011%0%
21:0011%0%
22:0011%0%
23:0011%0%
Sun, Feb 22
24:0011%0%
01:0011%0%
02:0011%0%
03:0011%0%
04:0011%0%
05:0011%0%
06:0072%0%
07:0065%0%
08:003.5%0%
09:003.7%0%
10:003.6%0%
11:003.8%0%
12:003.6%0%
13:003.6%0%
14:003.5%0%
15:003.4%0%
16:003.3%0%
17:003.4%0%
18:0063%0%
19:0029%0%
20:007.5%0%
21:007%0%
22:007%0%
23:009.4%0%
Mon, Feb 23
24:009.5%0%
01:0011%0%
02:008.2%0%
03:007.4%0%
04:0011%0%
05:008.7%0%
06:0054%0%
07:0042%0%
08:002.3%0%
09:002.3%0%
10:003%0%
11:003.2%0%
12:002.4%0%
13:002.2%0%
14:002.2%0%
15:002.2%0%
16:002.1%0%
17:002.9%0%
18:0042%0%
19:0026%0%
20:006.4%0%
21:006.4%0%
22:006.8%0%
23:006.7%0%
Tue, Feb 24
24:007.4%0%
01:006.4%0%
02:007.9%0%
03:0010%0%
04:009.8%0%
05:009.8%0%
06:0069%0%
07:0064%0%
08:003.4%0%
09:003.3%0%
10:003.4%0%
11:003.3%0%
12:002.7%0%
13:002%0%
14:002.2%0%
15:002.2%0%
16:002.2%0%
17:002.2%0%
18:0045%0%
19:0027%33%
20:007.2%67%
21:006.4%100%
22:006.6%77%
23:006.6%53%
Wed, Feb 25
24:006.6%30%
01:007%37%
02:009.2%43%
03:009.8%50%
04:0010%55%
05:0011%61%
06:0068%66%
07:0043%63%
08:003.6%61%
09:003.6%58%
10:003.5%61%
11:003.5%65%
12:003.5%69%
13:003.3%46%
14:003.3%23%
15:003.3%0%
16:003.3%7.4%
17:003.4%15%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Blue Hour Quality mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
Europe/Lisbon
Blue Hour
High Clouds
%
Low Clouds
%
Mid-Level Clouds
%
Relative Humidity
%
Solar Elevation
°
Total Cloud Coverage
%
Visibility
m
Wind Speed
m/s
Sun, Feb 22 Sunrise 07:14 Sunset 18:20
19:00
- 100% 0% 0% 74% -8.5° 100% 24134m 2m/s
20:00
- 69% 0% 0% 74% -20° 69% 24134m 2m/s
21:00
- 98% 0% 0% 73% -32° 98% 24135m 2.2m/s
22:00
- 91% 0% 0% 72% -44° 91% 24135m 2.2m/s
23:00
- 34% 0% 0% 72% -54° 34% 24135m 2.2m/s
Mon, Feb 23 Sunrise 07:13 Sunset 18:21
24:00
- 7% 0% 0% 73% -61° 7% 24135m 2.1m/s
01:00
- 18% 0% 0% 74% -63° 18% 24135m 2.4m/s
02:00
- 50% 0% 0% 74% -58° 50% 24135m 2.6m/s
03:00
- 62% 0% 0% 74% -50° 62% 24135m 2.8m/s
04:00
- 16% 0% 0% 72% -39° 16% 24134m 3.1m/s
05:00
- 42% 0% 2% 71% -27° 42% 24135m 3.1m/s
06:00
- 51% 0% 5% 70% -15° 51% 24134m 3.2m/s
07:00
- 95% 0% 15% 72% -3.3° 95% 24135m 3.3m/s
08:00
- 88% 0% 5% 74% 8.3° 88% 24134m 3.9m/s
09:00
- 68% 0% 8% 74% 19° 68% 24135m 4.4m/s
10:00
- 26% 0% 5% 76% 29° 26% 24134m 4.8m/s
11:00
- 20% 0% 5% 78% 37° 20% 24134m 5.2m/s
12:00
- 50% 0% 5% 79% 42° 50% 24135m 4.9m/s
13:00
- 100% 0% 16% 80% 43° 100% 24134m 5m/s
14:00
- 100% 0% 95% 80% 40° 100% 24135m 4.7m/s
15:00
- 100% 0% 83% 79% 34° 100% 24135m 4.4m/s
16:00
- 63% 0% 1% 78% 25° 63% 24134m 4.2m/s
17:00
- 12% 0% 0% 78% 15° 12% 24134m 3.4m/s
18:00
- 79% 0% 0% 79% 3.6° 79% 24134m 3.3m/s
19:00
- 100% 0% 0% 78% -8.3° 100% 24135m 3m/s
20:00
- 100% 0% 0% 77% -20° 100% 24135m 3.1m/s
21:00
- 100% 0% 0% 77% -32° 100% 24135m 3m/s
22:00
- 63% 0% 0% 77% -43° 63% 24135m 2.3m/s
23:00
- 68% 0% 0% 78% -53° 68% 24134m 3m/s
Tue, Feb 24 Sunrise 07:11 Sunset 18:22
24:00
- 53% 0% 0% 79% -60° 53% 24135m 3.1m/s
01:00
- 99% 0% 0% 80% -62° 99% 24134m 3.1m/s
02:00
- 45% 0% 0% 80% -58° 45% 24135m 3m/s
03:00
- 5% 0% 0% 81% -49° 5% 24135m 3.4m/s
04:00
- 5% 0% 0% 82% -39° 5% 24135m 4.4m/s
05:00
- 5% 0% 0% 83% -27° 5% 24135m 4m/s
06:00
- 5% 0% 0% 82% -15° 5% 24135m 3.8m/s
07:00
- 0% 0% 0% 82% -3° 0% 24134m 3.7m/s
08:00
- 0% 0% 0% 82% 8.6° 0% 24134m 4.5m/s
09:00
- 3% 0% 0% 81% 19° 3% 24135m 5.3m/s
10:00
- 0% 0% 0% 79% 29° 0% 24135m 5.1m/s
11:00
- 4% 0% 0% 77% 37° 4% 24134m 4.4m/s
12:00
- 37% 0% 0% 76% 42° 37% 24135m 5.1m/s
13:00
- 100% 0% 0% 76% 43° 100% 24134m 5.3m/s
14:00
- 100% 0% 30% 77% 41° 100% 24135m 5.1m/s
15:00
- 100% 0% 100% 78% 34° 100% 24135m 4.6m/s
16:00
- 100% 0% 100% 79% 25° 100% 24134m 5.1m/s
17:00
- 95% 0% 85% 80% 15° 95% 24135m 5.3m/s
18:00
- 96% 0% 100% 82% 3.8° 100% 24135m 4.6m/s
19:00
- 100% 0% 99% 82% -8.1° 100% 24134m 4.3m/s
20:00
- 100% 0% 34% 83% -20° 100% 24134m 3.9m/s
21:00
- 76% 0% 12% 84% -32° 76% 24134m 3.7m/s
22:00
- 100% 0% 86% 85% -43° 100% 24134m 3.5m/s
23:00
- 100% 0% 100% 87% -53° 100% 24134m 3.5m/s
Wed, Feb 25 Sunrise 07:10 Sunset 18:23
24:00
- 100% 0% 90% 89% -60° 100% 24135m 3.6m/s
01:00
- 67% 1% 60% 88% -62° 68% 24135m 3.6m/s
02:00
- 33% 3% 30% 87% -58° 36% 24135m 3.5m/s
03:00
- 0% 4% 0% 86% -49° 4% 24135m 3.5m/s
04:00
- 0% 3% 0% 83% -38° 3% 24135m 3.7m/s
05:00
- 0% 1% 0% 80% -27° 1% 24135m 3.9m/s
06:00
- 0% 0% 0% 76% -15° 0% 24135m 4.1m/s
07:00
- 0% 1% 0% 74% -2.8° 1% 24135m 4.7m/s
08:00
- 0% 1% 0% 71% 8.8° 1% 24135m 5.2m/s
09:00
- 0% 2% 0% 68% 20° 2% 24135m 5.7m/s
10:00
- 0% 1% 0% 70% 30° 1% 24135m 6.3m/s
11:00
- 0% 1% 0% 73% 38° 1% 24135m 6.9m/s
12:00
- 0% 0% 0% 75% 43° 0% 24135m 7.5m/s
13:00
- 0% 0% 0% 77% 44° 0% 24135m 7.1m/s
14:00
- 0% 0% 0% 80% 41° 0% 24135m 6.7m/s
15:00
- 0% 0% 0% 82% 34° 0% 24135m 6.3m/s
16:00
- 0% 0% 0% 82% 26° 0% 24135m 6.1m/s
17:00
- 0% 0% 0% 82% 15° 0% 24135m 5.9m/s
18:00
- 0% 0% 0% 81% 0% 24135m 5.7m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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