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Rule Fog Hunter

Charmouth - Fog Hunter - Dorset & Jurassic Coast

Charmouth, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread3.7°C
Visibility21559 (Clear)
Relative Humidity78%
Wind Speed7.1m/s (moderate winds)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Dense Fog (sunbreaks) at Sunrise
Charmouth
Mon, May 25 · 04:00–06:00 · 2h window
High confidence
77%
🌫️Fog Probability100%
Dewpoint Spread: 0.4°C
Visibility: 696 (Fog)
Relative Humidity: 97%
Wind Speed: 2.0m/s (calm conditions)
fog weather icon
Dense Fog (sunbreaks)
Charmouth
Mon, May 25 · 06:00–08:00
🌫️Fog Probability:100%
High

What this forecast looks for

Plain-language explanation from the rule

This forecast identifies when mist and fog conditions create atmospheric photography opportunities across Dorset's varied landscape. We track temperature, humidity, and wind patterns to predict when valley mist at Corfe Castle and sea fog along the coast will create moody, atmospheric scenes.

Dorset's geography creates distinctive fog opportunities—inland valleys that funnel mist around hilltop Corfe Castle, and coastal locations where sea fog rolls over limestone arches and cliff formations. These conditions transform familiar landmarks into mysterious, layered compositions.

What makes Dorset special for fog photography:

  • Corfe Castle - Ruined hilltop fortress emerges from valley mist, creating dramatic atmospheric layers
  • Coastal sea fog - Marine layer rolls over Durdle Door and along the Jurassic Coast
  • Kimmeridge Bay - Fog drifts across ledge formations extending into the sea
  • Portland - Sea fog wraps around the limestone peninsula and lighthouse

Corfe Castle offers Dorset's most dramatic fog photography—the ruined medieval fortress perched on a hilltop becomes even more evocative when valley mist swirls around its ramparts. Autumn and winter mornings (October-March) provide the best conditions when temperature inversions trap mist in the Purbeck valleys. Sea fog along the coast creates ethereal conditions at Durdle Door—the limestone arch appears and disappears through drifting layers. Portland Bill lighthouse cutting through sea fog creates moody maritime compositions. Lulworth Cove's horseshoe bay can fill completely with fog while surrounding cliffs remain visible. The key is monitoring overnight temperature drops that create mist, then being positioned at dawn when fog is densest and first light adds dimension. Fog typically burns off by mid-morning, so early starts are essential.

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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/London
Fog Probability
≥ 75.0%
Sun, May 17
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Mon, May 18
24:000%
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Tue, May 19
24:000%
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Wed, May 20
24:000%
01:000%
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Thu, May 21
24:000%
01:000%
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06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
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
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
Mon, May 18 Sunrise 05:19 Sunset 20:57
15:00
0% 8°C 0mm 78% 0cm 52° 12°C 0.25mm 0.31kPa 21559m 8.6m/s 7.1m/s
16:00
0% 7.4°C 0mm 78% 0cm 44° 11°C 0.31mm 0.3kPa 24134m 9m/s 7.1m/s
17:00
0% 7.7°C 0mm 78% 0cm 35° 11°C 0.38mm 0.3kPa 24134m 9.1m/s 7.7m/s
18:00
0% 7.9°C 0.01mm 82% 0cm 26° 11°C 0.38mm 0.24kPa 24134m 9.1m/s 6.7m/s
19:00
0% 8.6°C 0.13mm 89% 0cm 16° 10°C 0.56mm 0.13kPa 21078m 10m/s 7m/s
20:00
0% 9°C 0.41mm 92% 0cm 7.4° 10°C 0.31mm 0.1kPa 13541m 11m/s 7.2m/s
21:00
0% 9.2°C 0.98mm 94% 0cm -0.76° 10°C 1.1mm 0.07kPa 9485m 11m/s 7.6m/s
22:00
0% 9.2°C 1.2mm 95% 0cm -8.3° 10°C 2.4mm 0.06kPa 9737m 12m/s 7.4m/s
23:00
0% 9.5°C 0.52mm 96% 0cm -14° 10°C 3.4mm 0.05kPa 16946m 13m/s 8.5m/s
Tue, May 19 Sunrise 05:19 Sunset 20:57
24:00
0% 10°C 0.23mm 96% 0cm -18° 11°C 3.8mm 0.05kPa 18091m 14m/s 9.2m/s
01:00
0% 10°C 0.54mm 97% 0cm -19° 11°C 4.1mm 0.04kPa 5413m 14m/s 9.4m/s
02:00
0% 10°C 0.47mm 97% 0cm -19° 11°C 0.44mm 0.04kPa 4486m 15m/s 9.9m/s
03:00
0% 11°C 2.1mm 98% 0cm -15° 11°C 2.3mm 0.02kPa 1980m 16m/s 9.6m/s
04:00
0% 11°C 0.33mm 98% 0cm -10° 11°C 3mm 0.02kPa 4179m 16m/s 9.7m/s
05:00
0% 12°C 0.07mm 98% 0cm -3° 12°C 3.3mm 0.02kPa 6533m 13m/s 7.7m/s
06:00
0% 11°C 0mm 94% 0cm 5.2° 12°C 3.3mm 0.08kPa 24134m 11m/s 6.5m/s
07:00
0% 11°C 0mm 94% 0cm 14° 12°C 3.4mm 0.09kPa 24134m 12m/s 6.5m/s
08:00
1% 11°C 0mm 93% 0cm 23° 12°C 0mm 0.1kPa 24134m 12m/s 7.1m/s
09:00
1% 12°C 0mm 95% 0cm 33° 12°C 0mm 0.08kPa 24135m 12m/s 7.1m/s
10:00
2% 12°C 0.01mm 95% 0cm 42° 12°C 0.19mm 0.08kPa 21678m 13m/s 7.4m/s
11:00
1% 12°C 0mm 94% 0cm 50° 13°C 0.38mm 0.09kPa 20329m 13m/s 8.4m/s
12:00
1% 12°C 0mm 90% 0cm 56° 14°C 0.69mm 0.15kPa 17561m 13m/s 9.1m/s
13:00
0% 12°C 0mm 85% 0cm 59° 14°C 1mm 0.23kPa 19129m 13m/s 9.8m/s
14:00
4% 11°C 0mm 78% 0cm 57° 14°C 0.25mm 0.37kPa 19430m 13m/s 9.9m/s
15:00
8% 11°C 0mm 82% 0cm 52° 14°C 0.56mm 0.29kPa 18125m 13m/s 9.5m/s
16:00
12% 11°C 0mm 82% 0cm 44° 14°C 0.81mm 0.29kPa 17834m 14m/s 9.9m/s
17:00
12% 11°C 0mm 85% 0cm 35° 14°C 1.1mm 0.24kPa 15591m 14m/s 10m/s
18:00
13% 11°C 0mm 88% 0cm 26° 13°C 1.4mm 0.18kPa 19648m 14m/s 10m/s
19:00
13% 11°C 0mm 89% 0cm 17° 13°C 1.6mm 0.16kPa 24135m 15m/s 9.7m/s
20:00
24% 9.9°C 0mm 88% 0cm 7.6° 12°C 0mm 0.17kPa 24134m 14m/s 9.2m/s
21:00
35% 9.4°C 0mm 88% 0cm -0.52° 11°C 0mm 0.15kPa 24134m 13m/s 8m/s
22:00
46% 9.9°C 0mm 91% 0cm -8.1° 11°C 0mm 0.12kPa 24135m 14m/s 8.1m/s
23:00
40% 10°C 0mm 90% 0cm -14° 12°C 0.06mm 0.15kPa 24135m 15m/s 9.1m/s
Wed, May 20 Sunrise 05:17 Sunset 20:59
24:00
34% 10°C 0mm 88% 0cm -18° 12°C 0.06mm 0.17kPa 24134m 14m/s 9m/s
01:00
28% 9.9°C 0mm 86% 0cm -19° 12°C 0.06mm 0.21kPa 24134m 13m/s 8.6m/s
02:00
25% 10°C 0.02mm 87% 0cm -18° 12°C 0mm 0.18kPa 24135m 13m/s 7.5m/s
03:00
21% 11°C 0.02mm 91% 0cm -15° 12°C 0mm 0.12kPa 24135m 14m/s 7.6m/s
04:00
18% 11°C 0.2mm 91% 0cm -9.8° 12°C 0.06mm 0.13kPa 22766m 16m/s 8.6m/s
05:00
15% 11°C 0mm 93% 0cm -2.8° 12°C 0.38mm 0.09kPa 24135m 15m/s 8.7m/s
06:00
11% 12°C 0mm 94% 0cm 5.3° 12°C 0.38mm 0.09kPa 24135m 13m/s 7.5m/s
07:00
8% 12°C 0mm 95% 0cm 14° 12°C 0.38mm 0.08kPa 24134m 12m/s 6.8m/s
08:00
13% 12°C 0mm 94% 0cm 24° 13°C 0mm 0.08kPa 24134m 12m/s 6.7m/s
09:00
19% 12°C 0mm 90% 0cm 33° 13°C 0mm 0.15kPa 24134m 11m/s 6.6m/s
10:00
24% 12°C 0mm 84% 0cm 42° 14°C 0.06mm 0.26kPa 24135m 10m/s 7.2m/s
11:00
22% 11°C 0mm 80% 0cm 50° 15°C 0.06mm 0.33kPa 24135m 9.9m/s 7.4m/s
12:00
20% 12°C 0mm 81% 0cm 56° 15°C 0.06mm 0.32kPa 24135m 11m/s 8m/s
13:00
18% 12°C 0mm 80% 0cm 59° 15°C 0.13mm 0.35kPa 24134m 11m/s 8.2m/s
14:00
25% 12°C 0mm 80% 0cm 58° 16°C 0mm 0.35kPa 24135m 10m/s 8.1m/s
15:00
33% 12°C 0mm 80% 0cm 52° 16°C 0mm 0.36kPa 24135m 9.8m/s 7.6m/s
16:00
40% 12°C 0mm 80% 0cm 45° 16°C 0mm 0.35kPa 24134m 9.8m/s 7.6m/s
17:00
43% 12°C 0mm 80% 0cm 36° 15°C 0mm 0.35kPa 24135m 9.7m/s 7.1m/s
18:00
46% 12°C 0mm 83% 0cm 26° 15°C 0mm 0.29kPa 24135m 9m/s 6.4m/s
19:00
49% 12°C 0mm 88% 0cm 17° 14°C 0mm 0.2kPa 24134m 9m/s 5.8m/s
20:00
41% 12°C 0mm 90% 0cm 7.7° 14°C 0mm 0.16kPa 24134m 8.8m/s 5.6m/s
21:00
32% 12°C 0mm 91% 0cm -0.24° 13°C 0mm 0.13kPa 24135m 8.5m/s 5.4m/s
22:00
24% 12°C 0mm 93% 0cm -7.9° 13°C 0mm 0.1kPa 24135m 8.2m/s 5.2m/s
23:00
17% 12°C 0mm 93% 0cm -14° 13°C 0mm 0.11kPa 24135m 7.9m/s 5m/s
Thu, May 21 Sunrise 05:16 Sunset 21:00
24:00
9% 12°C 0mm 92% 0cm -18° 13°C 0mm 0.11kPa 24135m 7.5m/s 4.9m/s
01:00
2% 12°C 0mm 92% 0cm -19° 13°C 0mm 0.12kPa 24135m 7.1m/s 4.7m/s
02:00
1% 12°C 0mm 92% 0cm -18° 13°C 0mm 0.12kPa 24135m 6.3m/s 4.4m/s
03:00
1% 12°C 0mm 91% 0cm -15° 13°C 0mm 0.13kPa 24135m 5.5m/s 4m/s
04:00
0% 12°C 0mm 91% 0cm -9.6° 13°C 0mm 0.14kPa 24135m 4.6m/s 3.6m/s
05:00
1% 12°C 0mm 90% 0cm -2.6° 13°C 0mm 0.15kPa 24135m 4.6m/s 3.6m/s
06:00
1% 12°C 0mm 89% 0cm 5.5° 13°C 0mm 0.16kPa 24135m 4.6m/s 3.5m/s
07:00
2% 12°C 0mm 88% 0cm 14° 13°C 0mm 0.18kPa 24135m 4.5m/s 3.4m/s
08:00
9% 12°C 0mm 87% 0cm 24° 14°C 0mm 0.2kPa 24135m 4.6m/s 3.7m/s
09:00
17% 12°C 0mm 86% 0cm 33° 14°C 0mm 0.22kPa 24135m 4.7m/s 3.9m/s
10:00
24% 12°C 0mm 85% 0cm 42° 14°C 0mm 0.25kPa 24135m 4.8m/s 4.1m/s
11:00
24% 12°C 0mm 84% 0cm 50° 14°C 0mm 0.25kPa 24135m 5.3m/s 4.5m/s
12:00
25% 12°C 0mm 84% 0cm 57° 14°C 0mm 0.26kPa 24135m 5.8m/s 4.9m/s
13:00
25% 12°C 0mm 84% 0cm 59° 15°C 0mm 0.27kPa 24135m 6.3m/s 5.3m/s
14:00
36% 12°C 0mm 85% 0cm 58° 15°C 0mm 0.25kPa 24135m 7.4m/s 5.6m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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