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Rule Fog Hunter

Windermere - Fog Hunter - Lake District

Bowness-on-Windermere, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread2.8°C
Visibility24135 (Clear)
Relative Humidity81%
Wind Speed4.2m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Dense Fog (lingering)
Windermere
Thu, Feb 19 · 15:00–16:00 · 1h window
Medium confidence
61%
🌫️Fog Probability100%
Dewpoint Spread: 0.1°C
Visibility: 114 (Dense fog)
Relative Humidity: 99%
Wind Speed: 2.0m/s (calm conditions)

What this forecast looks for

Plain-language explanation from the rule

This 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 hour
0matching hours in the next 72 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 85.0%
Dewpoint Spread
≤ 2.0°C
Visibility
≤ 3000.0m
Wind Speed
≤ 2.0m/s
Fri, Feb 13
18:000%3.6°C24134m4.8m/s
19:000%2.8°C24135m4.2m/s
20:000%2.3°C24134m3.8m/s
21:000%2.1°C24135m3.4m/s
22:000%2.2°C24134m3m/s
23:000%2.3°C24134m2.7m/s
Sat, Feb 14
24:000%2.4°C24135m2.2m/s
01:000%2.7°C24134m1.8m/s
02:000%2.9°C24134m1.5m/s
03:000%3.1°C24135m1.4m/s
04:000%3.4°C24134m1.3m/s
05:000%3.5°C24134m1m/s
06:000%3.6°C24134m0.56m/s
07:000%3.7°C24134m0.84m/s
08:000%4°C24135m0.77m/s
09:000%4.9°C24134m0.55m/s
10:000%6.1°C24135m0.21m/s
11:000%6.6°C24134m0.66m/s
12:000%6.1°C24135m1.4m/s
13:000%5.6°C24134m2.1m/s
14:000%5.1°C24135m3m/s
15:000%4.1°C24135m2.9m/s
16:000%3.2°C24134m2.6m/s
17:000%2.7°C24135m3m/s
18:000%2.9°C24134m3.7m/s
19:000%3.1°C24134m4.6m/s
20:000%2.8°C24134m5.3m/s
21:000%2.4°C13800m6.6m/s
22:000%1.6°C8932m8m/s
23:000%1.2°C6742m8.7m/s
Sun, Feb 15
24:000%0.4°C363m9.4m/s
01:000%0.6°C619m9.8m/s
02:000%0.2°C65m8.9m/s
03:000%0.6°C3774m8.2m/s
04:000%0.2°C86m7.5m/s
05:000%0.4°C5294m6.9m/s
06:000%0.5°C10392m5m/s
07:0072%0.7°C10275m1.5m/s
08:0083%0.3°C8628m1.9m/s
09:0081%0.5°C7481m2.4m/s
10:0071%0.7°C7137m2.9m/s
11:000%1.3°C5090m4.4m/s
12:000%1.8°C9650m5.2m/s
13:000%1.9°C4757m7.8m/s
14:000%0.7°C5858m5.2m/s
15:000%0.6°C8495m4.9m/s
16:000%1.5°C4763m5.4m/s
17:000%1.3°C5548m5.3m/s
18:000%1.4°C9893m4.8m/s
19:000%1.5°C8440m4.6m/s
20:000%1.7°C6473m5.6m/s
21:000%1.5°C16085m6.4m/s
22:000%1.6°C14997m7.4m/s
23:000%1.5°C15501m7.7m/s
Mon, Feb 16
24:000%1.7°C16594m7.3m/s
01:000%1.2°C13677m5.5m/s
02:000%0.7°C10761m3.6m/s
03:000%0.3°C7844m1.8m/s
04:000%0.2°C5242m1.6m/s
05:000%0.1°C2639m1.5m/s
06:000%0°C37m1.3m/s
07:000%0.3°C99m1.7m/s
08:000%0.5°C160m2.1m/s
09:00100%0.7°C222m2.5m/s
10:00100%0.6°C653m3.2m/s
11:0046%0.4°C1084m4m/s
12:0033%0.3°C1515m4.8m/s
13:0024%0.8°C9055m4.7m/s
14:000%1.2°C16595m4.6m/s
15:000%1.5°C24135m4.6m/s
16:000%1.5°C24135m4m/s
17:000%1.4°C24135m3.5m/s
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 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/London
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Wind Gusts
m/s
Fri, Feb 13 Sunrise 07:37 Sunset 17:15
19:00
-3°C 0mm 81% 0cm -0.16°C 0mm 0.11kPa 9.5m/s
20:00
-2.9°C 0mm 84% 0cm -0.59°C 0mm 0.09kPa 8.5m/s
21:00
-2.9°C 0mm 86% 0cm -0.77°C 0mm 0.08kPa 6.5m/s
22:00
-3°C 0mm 85% 0cm -0.8°C 0mm 0.09kPa 4.9m/s
23:00
-3.1°C 0mm 84% 0cm -0.82°C 0mm 0.09kPa 3.3m/s
Sat, Feb 14 Sunrise 07:35 Sunset 17:17
24:00
-3.3°C 0mm 83% 0cm -0.86°C 0mm 0.1kPa 2.2m/s
01:00
-3.6°C 0mm 82% 0cm -0.95°C 0mm 0.1kPa 1.7m/s
02:00
-4°C 0mm 81% 0cm -1.1°C 0mm 0.11kPa 1.4m/s
03:00
-4.3°C 0mm 79% 0cm -1.2°C 0mm 0.12kPa 1.3m/s
04:00
-4.6°C 0mm 78% 0cm -1.2°C 0mm 0.12kPa 1.2m/s
05:00
-4.7°C 0mm 77% 0cm -1.2°C 0mm 0.13kPa 1m/s
06:00
-4.9°C 0mm 76% 0cm -1.3°C 0mm 0.13kPa 0.62m/s
07:00
-4.9°C 0mm 76% 0cm -1.2°C 0mm 0.14kPa 0.82m/s
08:00
-4.9°C 0mm 74% 0cm -0.89°C 0mm 0.15kPa 0.71m/s
09:00
-4.4°C 0mm 69% 0cm 0.54°C 0mm 0.2kPa 0.61m/s
10:00
-4°C 0mm 64% 0cm 2.1°C 0mm 0.26kPa 0.7m/s
11:00
-3.2°C 0mm 62% 0cm 3.4°C 0mm 0.3kPa 1.8m/s
12:00
-2°C 0mm 65% 0cm 4.1°C 0mm 0.29kPa 3.2m/s
13:00
-1.1°C 0mm 67% 0cm 4.5°C 0mm 0.28kPa 3.4m/s
14:00
-0.6°C 0mm 70% 0.04cm 4.5°C 0.06mm 0.26kPa 4m/s
15:00
0°C 0mm 74% 0cm 4.1°C 0.06mm 0.21kPa 4.7m/s
16:00
0.1°C 0mm 79% 0.03cm 3.3°C 0.13mm 0.16kPa 5m/s
17:00
0.1°C 0mm 82% 0.04cm 2.8°C 0.13mm 0.13kPa 6m/s
18:00
-0.2°C 0mm 81% 0cm 2.7°C 0.13mm 0.14kPa 8m/s
19:00
-0.3°C 0mm 80% 0cm 2.8°C 0mm 0.15kPa 8.5m/s
20:00
-0.2°C 0mm 82% 0cm 2.6°C 0mm 0.13kPa 9.5m/s
21:00
-0.2°C 0.26mm 84% 0.29cm 2.2°C 0.13mm 0.11kPa 10m/s
22:00
-0.2°C 0.32mm 89% 0.34cm 1.4°C 0.63mm 0.07kPa 12m/s
23:00
-0.4°C 0.42mm 92% 0.42cm 0.77°C 0.88mm 0.05kPa 13m/s
Sun, Feb 15 Sunrise 07:32 Sunset 17:19
24:00
-0.1°C 1.2mm 98% 1.2cm 0.28°C 2.8mm 0.02kPa 16m/s
01:00
0°C 0.7mm 96% 0.7cm 0.57°C 0.56mm 0.03kPa 16m/s
02:00
0.4°C 1.3mm 98% 1.3cm 0.63°C 1.6mm 0.01kPa 15m/s
03:00
0.6°C 0.93mm 96% 0.93cm 1.2°C 2.6mm 0.03kPa 13m/s
04:00
1.3°C 0.42mm 99% 0.42cm 1.5°C 3.3mm 0.01kPa 13m/s
05:00
1.5°C 0.05mm 98% 0.15cm 1.9°C 3.6mm 0.02kPa 13m/s
06:00
2.7°C 0mm 96% 0cm 3.2°C 3.6mm 0.03kPa 8.4m/s
07:00
2.7°C 0mm 95% 0cm 3.4°C 0mm 0.04kPa 4.1m/s
08:00
2.3°C 0mm 98% 0cm 2.6°C 0.06mm 0.02kPa 4.1m/s
09:00
3.2°C 0mm 96% 0cm 3.7°C 0.13mm 0.03kPa 6.5m/s
10:00
4.1°C 0mm 95% 0cm 4.8°C 0.19mm 0.04kPa 7.1m/s
11:00
4.5°C 0.01mm 91% 0cm 5.8°C 0.44mm 0.08kPa 11m/s
12:00
4.8°C 0mm 89% 0cm 6.6°C 0.69mm 0.11kPa 10m/s
13:00
4.5°C 1mm 88% 0cm 6.4°C 0.81mm 0.12kPa 11m/s
14:00
4.2°C 2.3mm 95% 0cm 4.9°C 2.2mm 0.04kPa 11m/s
15:00
4.4°C 0mm 96% 0cm 5°C 3.1mm 0.04kPa 12m/s
16:00
4.3°C 0mm 90% 0cm 5.8°C 3.6mm 0.09kPa 12m/s
17:00
4.1°C 0mm 92% 0cm 5.4°C 4mm 0.08kPa 12m/s
18:00
3.6°C 0mm 90% 0cm 5°C 4.2mm 0.09kPa 12m/s
19:00
3.3°C 0mm 90% 0cm 4.8°C 0.13mm 0.09kPa 12m/s
20:00
3.3°C 0.01mm 89% 0cm 5°C 0.44mm 0.1kPa 13m/s
21:00
3.7°C 0.07mm 90% 0cm 5.2°C 0.81mm 0.09kPa 13m/s
22:00
3.5°C 0.02mm 90% 0cm 5.1°C 1.3mm 0.09kPa 13m/s
23:00
3.3°C 0.01mm 90% 0cm 4.8°C 1.7mm 0.09kPa 13m/s
Mon, Feb 16 Sunrise 07:30 Sunset 17:21
24:00
2.9°C 0.01mm 89% 0cm 4.6°C 2.1mm 0.1kPa 13m/s
01:00
2.3°C 0.3mm 92% 0.41cm 3.5°C 1.5mm 0.06kPa 9.5m/s
02:00
1.7°C 0.59mm 95% 0.82cm 2.4°C 1mm 0.04kPa 5.9m/s
03:00
1°C 0.88mm 98% 1.2cm 1.3°C 0.5mm 0.01kPa 2.4m/s
04:00
1°C 0.6mm 99% 0.82cm 1.2°C 1.7mm 0.01kPa 2.2m/s
05:00
1°C 0.31mm 99% 0.41cm 1.1°C 2.9mm 0kPa 2m/s
06:00
1°C 0.03mm 100% 0cm 1°C 4.1mm 0kPa 1.8m/s
07:00
1.1°C 0.02mm 98% 0cm 1.4°C 2.8mm 0.01kPa 2.3m/s
08:00
1.2°C 0.01mm 97% 0cm 1.7°C 1.4mm 0.02kPa 2.8m/s
09:00
1.3°C 0mm 95% 0cm 2°C 0mm 0.03kPa 3.3m/s
10:00
1.3°C 0.07mm 96% 0.11cm 1.9°C 0.08mm 0.03kPa 5.2m/s
11:00
1.3°C 0.15mm 97% 0.22cm 1.7°C 0.17mm 0.02kPa 7m/s
12:00
1.3°C 0.22mm 98% 0.33cm 1.6°C 0.25mm 0.02kPa 8.8m/s
13:00
0.2°C 0.15mm 95% 0.22cm 0.98°C 0.77mm 0.03kPa 9.2m/s
14:00
-0.8°C 0.07mm 92% 0.11cm 0.35°C 1.3mm 0.05kPa 9.6m/s
15:00
-1.8°C 0mm 89% 0cm -0.27°C 1.8mm 0.06kPa 9.9m/s
16:00
-2.8°C 0mm 90% 0cm -1.3°C 1.8mm 0.06kPa 8.2m/s
17:00
-3.7°C 0mm 90% 0cm -2.3°C 1.8mm 0.05kPa 6.4m/s
18:00
-4.7°C 0mm 90% 0cm -3.3°C 1.8mm 0.05kPa 4.6m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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