Rule
Fog Hunter
Blea Tarn - Fog Hunter - Lake District
Chapel Stile, England, United Kingdom
Thick, moody fog for atmospheric forest and landscape shots
Currently
Real-time conditionsDewpoint Spread0.2°C
Visibility196 (Dense fog)
Relative Humidity99%
Wind Speed3.9m/s (calm conditions)
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/London
Next opportunity
Moderate Fog
Blea Tarn
Tomorrow · 21:00–22:00 · 1h window
Medium confidence
42%
🌫️Fog Probability64.9%
Dewpoint Spread: 0.5°C
Visibility: 24135 (Clear)
Relative Humidity: 97%
Wind Speed: 2.8m/s (calm conditions)
Moderate Fog at Sunset
Blea Tarn
Sat, Apr 18 · 19:00–21:00
🌫️Fog Probability:62.7%
Low
Moderate Fog at Dusk
Blea Tarn
Sat, Apr 18 · 21:00–22:00
🌫️Fog Probability:78.4%
Medium
Moderate Fog
Blea Tarn
Sat, Apr 18 · 22:00–23:00
🌫️Fog Probability:84.8%
Medium
What this forecast looks for
Plain-language explanation from the ruleThis forecast tracks the conditions that create the Lake District's legendary atmospheric photography. We combine fog probability, dewpoint spread, visibility, and wind data to predict when and where mist will form over these famous lakes and valleys.
The Lake District's combination of lakes, tarns, and enclosed valleys creates ideal conditions for fog formation. Cool, calm nights allow mist to pool in valley bottoms, creating ethereal scenes at dawn that have inspired poets and photographers for centuries.
What makes the Lake District special for fog photography:
- Lake mist - Cold water surfaces generate fog that pools over the lakes at dawn
- Valley inversions - Mountain-ringed valleys trap mist while fells rise above
- Romantic landscapes - This is Wordsworth and Turner country, with timeless views
- Accessible locations - Well-maintained paths reach viewpoints above the fog layer
Peak fog season runs from late August through October, when temperature differentials are greatest. The best conditions typically occur on calm, clear nights when temperatures drop near dewpoint. Arrive before dawn—lake mist often lifts within an hour or two of sunrise. Higher viewpoints like Catbells or Loughrigg offer shots looking down at fog-filled valleys.
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72-hour requirements breakdown
What passed or failed, hour by hourAND logic: all conditions required
Meets requirement
Misses requirement
Time Europe/London | Fog Probability ≥ 60.0% |
|---|---|
| Tue, Apr 14 | |
| 03:00 | 0% |
| 04:00 | 0% |
| 05:00 | 0% |
| 06:00 | 0% |
| 07:00 | 0% |
| 08:00 | 0% |
| 09:00 | 0% |
| 10:00 | 0% |
| 11:00 | 0% |
| 12:00 | 0% |
| 13:00 | 0% |
| 14:00 | 0% |
| 15:00 | 0% |
| 16:00 | 10% |
| 17:00 | 14% |
| 18:00 | 49% |
| 19:00 | 0% |
| 20:00 | 63% |
| 21:00 | 61% |
| 22:00 | 60% |
| 23:00 | 63% |
| Wed, Apr 15 | |
| 24:00 | 56% |
| 01:00 | 56% |
| 02:00 | 0% |
| 03:00 | 0% |
| 04:00 | 0% |
| 05:00 | 0% |
| 06:00 | 0% |
| 07:00 | 0% |
| 08:00 | 47% |
| 09:00 | 41% |
| 10:00 | 37% |
| 11:00 | 33% |
| 12:00 | 0% |
| 13:00 | 0% |
| 14:00 | 0% |
| 15:00 | 0% |
| 16:00 | 0% |
| 17:00 | 0% |
| 18:00 | 0% |
| 19:00 | 0% |
| 20:00 | 0% |
| 21:00 | 0% |
| 22:00 | 0% |
| 23:00 | 0% |
| Thu, Apr 16 | |
| 24:00 | 0% |
| 01:00 | 0% |
| 02:00 | 0% |
| 03:00 | 0% |
| 04:00 | 0% |
| 05:00 | 0% |
| 06:00 | 0% |
| 07:00 | 0% |
| 08:00 | 0% |
| 09:00 | 0% |
| 10:00 | 0% |
| 11:00 | 0% |
| 12:00 | 0% |
| 13:00 | 0% |
| 14:00 | 0% |
| 15:00 | 0% |
| 16:00 | 0% |
| 17:00 | 0% |
| 18:00 | 0% |
| 19:00 | 0% |
| 20:00 | 34% |
| 21:00 | 65% |
| 22:00 | 55% |
| 23:00 | 30% |
| Fri, Apr 17 | |
| 24:00 | 0% |
| 01:00 | 22% |
| 02:00 | 48% |
| 03:00 | 59% |
| 04:00 | 59% |
| 05:00 | 59% |
| 06:00 | 49% |
| 07:00 | 32% |
| 08:00 | 0% |
| 09:00 | 0% |
| 10:00 | 0% |
| 11:00 | 0% |
| 12:00 | 0% |
| 13:00 | 0% |
| 14:00 | 0% |
| 15:00 | 0% |
| 16:00 | 0% |
| 17:00 | 0% |
| 18:00 | 0% |
| 19:00 | 0% |
| 20:00 | 0% |
| 21:00 | 0% |
| 22:00 | 0% |
| 23:00 | 0% |
| Sat, Apr 18 | |
| 24:00 | 0% |
| 01:00 | 0% |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).
What does Fog Probability mean?
Inputs that drive the scoreThis 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/London | Clear Sky Probability (Ensemble) % | Dew Point °C | Rainfall mm | Relative Humidity % | Snowfall cm | Solar Elevation ° | Temperature °C | Total Precipitation mm | Vapor Pressure Deficit kPa | Visibility m | Wind Gusts m/s | Wind Speed m/s |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wed, Apr 15
Sunrise 06:10
Sunset 20:14 | ||||||||||||
| 03:00 ☾ | 0% | 8.1°C | 1.8mm | 99% | 0cm | -22° | 8.3°C | 2.1mm | 0.01kPa | 196m | 9.9m/s | 3.9m/s |
| 04:00 ☾ | 0% | 8.3°C | 2.8mm | 99% | 0cm | -17° | 8.4°C | 3.6mm | 0.01kPa | 186m | 9.3m/s | 3.7m/s |
| 05:00 ☾ | 0% | 8.5°C | 0.92mm | 99% | 0cm | -10° | 8.6°C | 5.3mm | 0.01kPa | 145m | 11m/s | 3.9m/s |
| 06:00 ☾ | 0% | 8.8°C | 0.06mm | 99% | 0cm | -2.1° | 8.9°C | 5.6mm | 0.01kPa | 101m | 11m/s | 4.1m/s |
| 07:00 | 0% | 8.8°C | 0.15mm | 99% | 0cm | 6.3° | 9°C | 5.8mm | 0.01kPa | 139m | 10m/s | 3.8m/s |
| 08:00 | 0% | 8.9°C | 0mm | 99% | 0cm | 15° | 9.1°C | 0.25mm | 0.01kPa | 201m | 9.9m/s | 3.7m/s |
| 09:00 | 0% | 9.1°C | 0mm | 99% | 0cm | 24° | 9.3°C | 0.38mm | 0.01kPa | 223m | 10m/s | 3.8m/s |
| 10:00 | 0% | 9.4°C | 0.02mm | 99% | 0cm | 31° | 9.6°C | 0.63mm | 0.02kPa | 194m | 11m/s | 4.3m/s |
| 11:00 | 0% | 9.6°C | 0.08mm | 98% | 0cm | 38° | 9.9°C | 0.88mm | 0.02kPa | 138m | 11m/s | 4.7m/s |
| 12:00 | 0% | 9.5°C | 0.06mm | 96% | 0cm | 43° | 10°C | 1.3mm | 0.05kPa | 14230m | 12m/s | 5.9m/s |
| 13:00 | 0% | 9.5°C | 0mm | 93% | 0cm | 45° | 11°C | 1.8mm | 0.09kPa | 15831m | 13m/s | 6.5m/s |
| 14:00 | 0% | 9.6°C | 0mm | 88% | 0cm | 44° | 12°C | 0.44mm | 0.17kPa | 21377m | 15m/s | 7.4m/s |
| 15:00 | 0% | 8.9°C | 0mm | 87% | 0cm | 41° | 11°C | 1.1mm | 0.18kPa | 11811m | 14m/s | 8m/s |
| 16:00 | 0% | 9.4°C | 2mm | 88% | 0cm | 35° | 11°C | 2mm | 0.16kPa | 6268m | 14m/s | 8.6m/s |
| 17:00 | 0% | 7.1°C | 0.68mm | 93% | 0cm | 27° | 8.1°C | 4.1mm | 0.07kPa | 9832m | 14m/s | 6.9m/s |
| 18:00 | 0% | 6.9°C | 0mm | 92% | 0cm | 19° | 8.1°C | 4.6mm | 0.09kPa | 22994m | 14m/s | 7m/s |
| 19:00 | 0% | 6.5°C | 0mm | 91% | 0cm | 9.9° | 7.9°C | 4.7mm | 0.1kPa | 15469m | 14m/s | 7.7m/s |
| 20:00 | 16% | 5.6°C | 0mm | 92% | 0cm | 1.6° | 6.8°C | 0.06mm | 0.08kPa | 24135m | 14m/s | 7.3m/s |
| 21:00 ☾ | 32% | 5.2°C | 0mm | 90% | 0cm | -6.8° | 6.7°C | 0.19mm | 0.09kPa | 22484m | 16m/s | 8.7m/s |
| 22:00 ☾ | 48% | 5.5°C | 0mm | 92% | 0cm | -14° | 6.7°C | 0.31mm | 0.08kPa | 21019m | 16m/s | 8.6m/s |
| 23:00 ☾ | 33% | 5.1°C | 0.95mm | 92% | 0cm | -20° | 6.3°C | 0.56mm | 0.08kPa | 11288m | 16m/s | 8.7m/s |
| Thu, Apr 16
Sunrise 06:10
Sunset 20:14 | ||||||||||||
| 24:00 ☾ | 19% | 6°C | 0.89mm | 97% | 0cm | -24° | 6.4°C | 1.7mm | 0.03kPa | 1177m | 17m/s | 8.3m/s |
| 01:00 ☾ | 4% | 5.9°C | 0.16mm | 94% | 0cm | -25° | 6.8°C | 2.3mm | 0.06kPa | 15852m | 17m/s | 9.7m/s |
| 02:00 ☾ | 5% | 5.9°C | 0.01mm | 95% | 0cm | -25° | 6.6°C | 0.31mm | 0.05kPa | 24134m | 15m/s | 9.1m/s |
| 03:00 ☾ | 7% | 5.7°C | 0.01mm | 94% | 0cm | -22° | 6.5°C | 0.56mm | 0.05kPa | 23811m | 14m/s | 8.7m/s |
| 04:00 ☾ | 8% | 5.4°C | 0.17mm | 95% | 0cm | -16° | 6.3°C | 0.75mm | 0.05kPa | 16488m | 13m/s | 7.3m/s |
| 05:00 ☾ | 8% | 5.7°C | 0mm | 95% | 0cm | -9.7° | 6.4°C | 1.1mm | 0.05kPa | 24135m | 13m/s | 7.5m/s |
| 06:00 ☾ | 8% | 5.6°C | 0.01mm | 95% | 0cm | -1.8° | 6.4°C | 1.4mm | 0.05kPa | 21001m | 12m/s | 7.1m/s |
| 07:00 | 8% | 5.2°C | 0mm | 94% | 0cm | 6.6° | 6.1°C | 1.6mm | 0.06kPa | 24134m | 12m/s | 6.6m/s |
| 08:00 | 12% | 5.2°C | 0mm | 91% | 0cm | 15° | 6.5°C | 0.06mm | 0.08kPa | 24135m | 12m/s | 7.1m/s |
| 09:00 | 15% | 5.5°C | 0mm | 91% | 0cm | 24° | 6.8°C | 0.25mm | 0.09kPa | 24134m | 12m/s | 6.9m/s |
| 10:00 | 19% | 5.1°C | 0mm | 86% | 0cm | 32° | 7.3°C | 0.31mm | 0.14kPa | 24134m | 12m/s | 8.2m/s |
| 11:00 | 21% | 4.8°C | 0mm | 83% | 0cm | 39° | 7.5°C | 0.38mm | 0.17kPa | 24135m | 11m/s | 7.8m/s |
| 12:00 | 22% | 4.4°C | 0mm | 82% | 0cm | 44° | 7.4°C | 0.44mm | 0.19kPa | 24135m | 9.8m/s | 7.1m/s |
| 13:00 | 24% | 4.5°C | 0mm | 77% | 0cm | 46° | 8.3°C | 0.44mm | 0.25kPa | 24135m | 8.9m/s | 6.4m/s |
| 14:00 | 25% | 4.6°C | 0mm | 72% | 0cm | 45° | 9.3°C | 0mm | 0.32kPa | 24134m | 8.3m/s | 6.4m/s |
| 15:00 | 27% | 4.6°C | 0mm | 71% | 0cm | 41° | 9.6°C | 0mm | 0.34kPa | 24134m | 7.8m/s | 6.1m/s |
| 16:00 | 28% | 4.4°C | 0mm | 70% | 0cm | 35° | 9.6°C | 0mm | 0.36kPa | 24134m | 7.1m/s | 4.9m/s |
| 17:00 | 19% | 4.2°C | 0mm | 70% | 0cm | 27° | 9.5°C | 0mm | 0.36kPa | 24134m | 6.6m/s | 4.3m/s |
| 18:00 | 10% | 4.5°C | 0mm | 75% | 0cm | 19° | 8.8°C | 0mm | 0.29kPa | 24135m | 6.6m/s | 3.8m/s |
| 19:00 | 1% | 5.4°C | 0mm | 85% | 0cm | 10° | 7.9°C | 0.06mm | 0.16kPa | 24134m | 6m/s | 2.7m/s |
| 20:00 | 1% | 5.5°C | 0mm | 94% | 0cm | 1.9° | 6.5°C | 0mm | 0.06kPa | 24134m | 3.5m/s | 2.7m/s |
| 21:00 ☾ | 0% | 5.4°C | 0mm | 97% | 0cm | -6.5° | 5.9°C | 0.06mm | 0.03kPa | 24135m | 4.3m/s | 2.8m/s |
| 22:00 ☾ | 0% | 5.4°C | 0.02mm | 96% | 0cm | -14° | 6°C | 0.06mm | 0.03kPa | 24135m | 5.6m/s | 2.9m/s |
| 23:00 ☾ | 0% | 5.2°C | 0.03mm | 94% | 0cm | -19° | 6.2°C | 0.19mm | 0.06kPa | 24134m | 8.5m/s | 3.2m/s |
| Fri, Apr 17
Sunrise 06:08
Sunset 20:16 | ||||||||||||
| 24:00 ☾ | 0% | 5°C | 0.01mm | 92% | 0cm | -23° | 6.2°C | 0.19mm | 0.07kPa | 24135m | 7.3m/s | 3.2m/s |
| 01:00 ☾ | 0% | 5.1°C | 0.27mm | 96% | 0cm | -25° | 5.8°C | 0.38mm | 0.04kPa | 23069m | 7.3m/s | 3.6m/s |
| 02:00 ☾ | 0% | 5.4°C | 0.26mm | 98% | 0cm | -24° | 5.7°C | 0.25mm | 0.02kPa | 454m | 6.5m/s | 3.1m/s |
| 03:00 ☾ | 0% | 5.6°C | 0.3mm | 98% | 0cm | -21° | 5.9°C | 0.5mm | 0.02kPa | 344m | 5.5m/s | 2.5m/s |
| 04:00 ☾ | 0% | 5.6°C | 0.19mm | 98% | 0cm | -16° | 5.9°C | 0.75mm | 0.01kPa | 317m | 5.8m/s | 2.5m/s |
| 05:00 ☾ | 0% | 5.6°C | 0.01mm | 98% | 0cm | -9.4° | 5.8°C | 0.81mm | 0.02kPa | 420m | 5.3m/s | 2.2m/s |
| 06:00 ☾ | 0% | 5.4°C | 0.01mm | 98% | 0cm | -1.4° | 5.7°C | 0.81mm | 0.02kPa | 20826m | 4.8m/s | 2.1m/s |
| 07:00 | 0% | 5.3°C | 0mm | 95% | 0cm | 6.9° | 6°C | 0.81mm | 0.04kPa | 24134m | 5.9m/s | 2m/s |
| 08:00 | 0% | 6.1°C | 0mm | 93% | 0cm | 16° | 7.1°C | 0.81mm | 0.07kPa | 21529m | 7.7m/s | 3.3m/s |
| 09:00 | 0% | 6.9°C | 0mm | 91% | 0cm | 24° | 8.2°C | 0.81mm | 0.09kPa | 18924m | 9.5m/s | 4.6m/s |
| 10:00 | 0% | 7.7°C | 0mm | 90% | 0cm | 32° | 9.3°C | 0.81mm | 0.12kPa | 16319m | 11m/s | 5.8m/s |
| 11:00 | 0% | 7.1°C | 0mm | 88% | 0cm | 39° | 9°C | 0.9mm | 0.14kPa | 18924m | 12m/s | 6m/s |
| 12:00 | 0% | 6.5°C | 0mm | 86% | 0cm | 44° | 8.7°C | 0.98mm | 0.16kPa | 21530m | 12m/s | 6.3m/s |
| 13:00 | 0% | 5.9°C | 0mm | 84% | 0cm | 46° | 8.4°C | 1.1mm | 0.18kPa | 24135m | 13m/s | 6.5m/s |
| 14:00 | 3% | 5.6°C | 0.003mm | 87% | 0cm | 45° | 7.6°C | 0.71mm | 0.14kPa | 24135m | 13m/s | 6.4m/s |
| 15:00 | 5% | 5.3°C | 0.007mm | 90% | 0cm | 41° | 6.9°C | 0.35mm | 0.1kPa | 24135m | 13m/s | 6.3m/s |
| 16:00 | 8% | 5°C | 0.01mm | 92% | 0cm | 35° | 6.1°C | 0mm | 0.07kPa | 24135m | 13m/s | 6.3m/s |
| 17:00 | 9% | 5.1°C | 0.007mm | 93% | 0cm | 27° | 6.2°C | 0.06mm | 0.07kPa | 24050m | 13m/s | 6.4m/s |
| 18:00 | 9% | 5.2°C | 0.003mm | 93% | 0cm | 19° | 6.3°C | 0.13mm | 0.07kPa | 23964m | 13m/s | 6.5m/s |
| 19:00 | 10% | 5.3°C | 0mm | 93% | 0cm | 10° | 6.3°C | 0.19mm | 0.07kPa | 23879m | 12m/s | 6.7m/s |
| 20:00 | 8% | 5.1°C | 0.7mm | 94% | 0cm | 2.1° | 5.9°C | 0.58mm | 0.05kPa | 16294m | 13m/s | 6.6m/s |
| 21:00 ☾ | 7% | 4.8°C | 1.4mm | 96% | 0cm | -6.2° | 5.4°C | 0.98mm | 0.04kPa | 8708m | 13m/s | 6.6m/s |
| 22:00 ☾ | 5% | 4.5°C | 2.1mm | 97% | 0cm | -13° | 5°C | 1.4mm | 0.03kPa | 1122m | 13m/s | 6.6m/s |
| 23:00 ☾ | 4% | 4.8°C | 1.5mm | 97% | 0cm | -19° | 5.3°C | 2mm | 0.03kPa | 863m | 13m/s | 7m/s |
| Sat, Apr 18
Sunrise 06:06
Sunset 20:18 | ||||||||||||
| 24:00 ☾ | 4% | 5.1°C | 0.84mm | 97% | 0cm | -23° | 5.6°C | 2.7mm | 0.03kPa | 603m | 13m/s | 7.5m/s |
| 01:00 ☾ | 3% | 5.4°C | 0.21mm | 97% | 0cm | -25° | 5.9°C | 3.4mm | 0.03kPa | 344m | 13m/s | 8m/s |
| 02:00 ☾ | 11% | 5.1°C | 0.15mm | 95% | 0cm | -24° | 5.7°C | 2.4mm | 0.04kPa | 8274m | 13m/s | 8.4m/s |
How to read: these inputs help produce the derived score; they are not requirements by themselves.
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