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Rule Fog Hunter

Wast Water - Fog Hunter - Lake District

Wasdale Head, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
Next opportunity
Dense Fog (lingering)
Wast Water
Wed, Jan 21 · 21:00–07:00 · 10h window
Medium confidence
44%

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
Sun, Jan 11
12:000%0°C260m9.3m/s
13:000%0°C180m9.6m/s
14:000%0°C160m10m/s
15:000%0°C140m11m/s
16:000%0°C220m11m/s
17:000%0°C160m11m/s
18:000%0°C280m11m/s
19:000%0°C160m13m/s
20:000%0°C900m12m/s
21:000%0.3°C2060m12m/s
22:000%0°C540m11m/s
23:000%0°C960m11m/s
Mon, Jan 12
24:000%0.1°C2040m11m/s
01:000%0°C680m11m/s
02:000%0°C1180m11m/s
03:000%0°C1020m9.4m/s
04:000%0°C940m9.4m/s
05:000%0°C680m8m/s
06:000%0°C340m8.9m/s
07:000%0°C200m9.3m/s
08:000%0°C180m9.2m/s
09:000%0°C280m9.7m/s
10:000%0°C340m9.4m/s
11:000%0.3°C2320m11m/s
12:000%0.3°C1620m10m/s
13:000%0°C1000m8.7m/s
14:000%0°C260m8.2m/s
15:000%0°C140m9.1m/s
16:000%0°C120m8.2m/s
17:000%0°C160m8.8m/s
18:000%0°C160m8.8m/s
19:000%0.1°C2240m8.4m/s
20:000%0°C340m8.9m/s
21:000%0°C120m8.5m/s
22:000%0°C120m8.5m/s
23:000%0°C240m9.3m/s
Tue, Jan 13
24:000%0°C1080m7.6m/s
01:000%0°C440m6.8m/s
02:000%0°C1120m7.8m/s
03:000%0°C1180m6.6m/s
04:0071%0°C300m4.5m/s
05:0084%0°C160m4.2m/s
06:00100%0°C140m3.2m/s
07:00100%0°C120m2.6m/s
08:00100%0°C160m2.6m/s
09:00100%0°C1485m2.7m/s
10:00100%0.3°C1920m3.2m/s
11:0049%0.1°C2470m3.4m/s
12:0034%0°C2200m4.7m/s
13:000%0°C1140m4.5m/s
14:0032%0.1°C1860m4.1m/s
15:0041%0.1°C2800m2.2m/s
16:0060%0°C660m2.5m/s
17:0030%0.3°C5060m4.3m/s
18:0030%0.1°C8220m4m/s
19:0069%0.3°C17120m3.8m/s
20:0049%0.1°C26440m5m/s
21:0041%0.3°C32100m5.2m/s
22:0041%0.1°C32640m4m/s
23:0069%0.3°C32620m3.9m/s
Wed, Jan 14
24:0042%0.9°C41860m4.7m/s
01:0038%0.7°C41860m4.3m/s
02:0038%0.7°C41820m4.9m/s
03:000%1.2°C30000m5.1m/s
04:0036%0.9°C34380m5.2m/s
05:0038%0.7°C29880m5m/s
06:0036%0.9°C17940m4.8m/s
07:0061%0.6°C13780m3.9m/s
08:0022%0.7°C21860m4.3m/s
09:0022%0.7°C31680m4.5m/s
10:000%1°C17700m4.9m/s
11:000%1.2°C36640m4.2m/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
Sun, Jan 11 Sunrise 08:29 Sunset 16:12
13:00
5°C 0.9mm 100% 0cm 5°C 0.9mm 0kPa 17m/s
14:00
5.4°C 2.8mm 100% 0cm 5.4°C 2.8mm 0kPa 17m/s
15:00
5.9°C 1.6mm 100% 0cm 5.9°C 1.6mm 0kPa 19m/s
16:00
6.1°C 2.1mm 100% 0cm 6.1°C 2.1mm 0kPa 19m/s
17:00
6.5°C 2.3mm 100% 0cm 6.5°C 2.3mm 0kPa 19m/s
18:00
6.8°C 1.9mm 100% 0cm 6.8°C 1.9mm 0kPa 20m/s
19:00
7.4°C 1.5mm 100% 0cm 7.4°C 1.5mm 0kPa 22m/s
20:00
8.2°C 2.5mm 100% 0cm 8.2°C 2.5mm 0kPa 22m/s
21:00
8.5°C 2.8mm 98% 0cm 8.8°C 2.8mm 0.02kPa 22m/s
22:00
8.7°C 1.1mm 100% 0cm 8.7°C 1.1mm 0kPa 23m/s
23:00
8.5°C 0mm 100% 0cm 8.5°C 0mm 0kPa 19m/s
Mon, Jan 12 Sunrise 08:29 Sunset 16:13
24:00
8.3°C 0mm 99% 0cm 8.4°C 0mm 0.01kPa 19m/s
01:00
8.4°C 0mm 100% 0cm 8.4°C 0mm 0kPa 19m/s
02:00
8.1°C 0mm 100% 0cm 8.1°C 0mm 0kPa 20m/s
03:00
8.1°C 0mm 100% 0cm 8.1°C 0mm 0kPa 19m/s
04:00
8°C 0mm 100% 0cm 8°C 0mm 0kPa 18m/s
05:00
7.9°C 0mm 100% 0cm 7.9°C 0mm 0kPa 16m/s
06:00
7.9°C 0mm 100% 0cm 7.9°C 0mm 0kPa 15m/s
07:00
8°C 0mm 100% 0cm 8°C 0mm 0kPa 16m/s
08:00
8.1°C 0mm 100% 0cm 8.1°C 0mm 0kPa 16m/s
09:00
8°C 0mm 100% 0cm 8°C 0mm 0kPa 16m/s
10:00
8.3°C 0mm 100% 0cm 8.3°C 0mm 0kPa 16m/s
11:00
8.1°C 3.7mm 98% 0cm 8.4°C 3.7mm 0.02kPa 19m/s
12:00
7.8°C 2.4mm 98% 0cm 8.1°C 2.4mm 0.02kPa 19m/s
13:00
7.9°C 6.5mm 100% 0cm 7.9°C 6.5mm 0kPa 19m/s
14:00
8.1°C 0.1mm 100% 0cm 8.1°C 0.1mm 0kPa 15m/s
15:00
8.4°C 0mm 100% 0cm 8.4°C 0mm 0kPa 15m/s
16:00
8.2°C 0mm 100% 0cm 8.2°C 0mm 0kPa 15m/s
17:00
8.4°C 0mm 100% 0cm 8.4°C 0mm 0kPa 15m/s
18:00
8.3°C 0mm 100% 0cm 8.3°C 0mm 0kPa 15m/s
19:00
7.9°C 0mm 99% 0cm 8°C 0mm 0.01kPa 17m/s
20:00
8.1°C 0mm 100% 0cm 8.1°C 0mm 0kPa 15m/s
21:00
8.1°C 0mm 100% 0cm 8.1°C 0mm 0kPa 15m/s
22:00
8.2°C 0mm 100% 0cm 8.2°C 0mm 0kPa 15m/s
23:00
8°C 0mm 100% 0cm 8°C 0mm 0kPa 16m/s
Tue, Jan 13 Sunrise 08:28 Sunset 16:15
24:00
7.6°C 0mm 100% 0cm 7.6°C 0mm 0kPa 16m/s
01:00
7.3°C 0mm 100% 0cm 7.3°C 0mm 0kPa 13m/s
02:00
7.4°C 0mm 100% 0cm 7.4°C 0mm 0kPa 13m/s
03:00
7.3°C 0mm 100% 0cm 7.3°C 0mm 0kPa 13m/s
04:00
7.2°C 0mm 100% 0cm 7.2°C 0mm 0kPa 11m/s
05:00
7.3°C 0mm 100% 0cm 7.3°C 0mm 0kPa 7.8m/s
06:00
7.3°C 0mm 100% 0cm 7.3°C 0mm 0kPa 7.1m/s
07:00
7.2°C 0mm 100% 0cm 7.2°C 0mm 0kPa 5.2m/s
08:00
6.7°C 0mm 100% 0cm 6.7°C 0mm 0kPa 4.2m/s
09:00
6.4°C 0.08mm 100% 0cm 6.4°C 0.08mm 0kPa 4.8m/s
10:00
6.1°C 0.1mm 98% 0cm 6.4°C 0.1mm 0.02kPa 5.8m/s
11:00
6.1°C 0.53mm 99% 0cm 6.2°C 0.53mm 0.01kPa 6.6m/s
12:00
6.5°C 0.8mm 100% 0cm 6.5°C 0.8mm 0kPa 9.2m/s
13:00
6.8°C 1mm 100% 0cm 6.8°C 1mm 0kPa 9.3m/s
14:00
6.6°C 0.9mm 99% 0cm 6.7°C 0.9mm 0.01kPa 9.6m/s
15:00
6.5°C 0.7mm 99% 0cm 6.6°C 0.7mm 0.01kPa 7.9m/s
16:00
6.2°C 0.9mm 100% 0cm 6.2°C 0.9mm 0kPa 4.3m/s
17:00
4.5°C 0.9mm 98% 0cm 4.8°C 0.9mm 0.02kPa 8.6m/s
18:00
4.5°C 0.3mm 99% 0cm 4.6°C 0.3mm 0.01kPa 8.2m/s
19:00
4°C 0mm 98% 0cm 4.3°C 0mm 0.02kPa 8.2m/s
20:00
4.2°C 0mm 99% 0cm 4.3°C 0mm 0.01kPa 9.6m/s
21:00
2.9°C 0mm 98% 0cm 3.2°C 0mm 0.02kPa 11m/s
22:00
2.4°C 0mm 99% 0cm 2.5°C 0mm 0.01kPa 11m/s
23:00
2.3°C 0mm 98% 0cm 2.6°C 0mm 0.01kPa 8.6m/s
Wed, Jan 14 Sunrise 08:27 Sunset 16:17
24:00
2°C 0mm 94% 0cm 2.9°C 0mm 0.05kPa 9.4m/s
01:00
1.9°C 0mm 95% 0cm 2.6°C 0mm 0.04kPa 9.7m/s
02:00
2°C 0mm 95% 0cm 2.7°C 0mm 0.04kPa 10m/s
03:00
1.9°C 0mm 92% 0cm 3.1°C 0mm 0.06kPa 11m/s
04:00
2.1°C 0mm 94% 0cm 3°C 0mm 0.05kPa 11m/s
05:00
2.1°C 0mm 95% 0cm 2.8°C 0mm 0.04kPa 11m/s
06:00
1.7°C 0mm 94% 0cm 2.6°C 0mm 0.04kPa 10m/s
07:00
2.2°C 0mm 96% 0cm 2.8°C 0mm 0.03kPa 9.7m/s
08:00
2.6°C 0mm 95% 0.07cm 3.3°C 0.5mm 0.04kPa 8.6m/s
09:00
2.8°C 0mm 95% 0.07cm 3.5°C 0.6mm 0.04kPa 8.8m/s
10:00
3°C 0mm 93% 0cm 4°C 0mm 0.06kPa 9.6m/s
11:00
3.5°C 0mm 92% 0cm 4.7°C 0.1mm 0.07kPa 9.5m/s
12:00
3.1°C 0mm 86% 0cm 5.3°C 0mm 0.12kPa 11m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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