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Rule Fog Hunter

Chesil Beach - Fog Hunter - Dorset & Jurassic Coast

Weymouth, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread3.5°C
Visibility24134 (Clear)
Relative Humidity79%
Wind Speed8.7m/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
Chesil Beach
Mon, May 25 · 03:00–04:00 · 1h window
Medium confidence
43%
🌫️Fog Probability86%
Dewpoint Spread: 0.3°C
Visibility: 4694 (Mist/Haze)
Relative Humidity: 98%
Wind Speed: 3.1m/s (calm conditions)
fog weather icon
Dense Fog at Sunrise
Chesil Beach
Mon, May 25 · 04:00–05:00
🌫️Fog Probability:100%
Medium

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%
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18:000%
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Mon, May 18
24:000%
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Tue, May 19
24:000%
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Wed, May 20
24:000%
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Thu, May 21
24:000%
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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 05:17 Sunset 20:55
15:00
1% 7.7°C 0mm 79% 0cm 52° 11°C 0mm 0.28kPa 24134m 9.8m/s 8.7m/s
16:00
2% 7.9°C 0mm 79% 0cm 44° 11°C 0.06mm 0.29kPa 24134m 9.3m/s 7.9m/s
17:00
1% 8.2°C 0mm 80% 0cm 35° 12°C 0.19mm 0.27kPa 24134m 9.4m/s 8m/s
18:00
1% 8.5°C 0mm 82% 0cm 26° 12°C 0.25mm 0.25kPa 24134m 9.1m/s 8m/s
19:00
0% 8.6°C 0.02mm 82% 0cm 16° 12°C 0.25mm 0.24kPa 24135m 9.3m/s 7.7m/s
20:00
0% 8.8°C 0.11mm 84% 0cm 7.1° 11°C 0.06mm 0.22kPa 24135m 10m/s 8.1m/s
21:00
0% 9.5°C 0.45mm 88% 0cm -1.1° 11°C 0.38mm 0.16kPa 17001m 10m/s 8.4m/s
22:00
0% 9.6°C 0.79mm 89% 0cm -8.6° 11°C 1.1mm 0.15kPa 13361m 11m/s 8.2m/s
23:00
0% 10°C 0.54mm 91% 0cm -14° 11°C 1.8mm 0.13kPa 14908m 12m/s 8.9m/s
Tue, May 19 Sunrise 05:17 Sunset 20:55
24:00
0% 10°C 0.05mm 92% 0cm -18° 12°C 2.1mm 0.12kPa 24134m 14m/s 11m/s
01:00
0% 11°C 0.2mm 91% 0cm -20° 12°C 2.3mm 0.13kPa 24134m 14m/s 12m/s
02:00
0% 11°C 1.2mm 92% 0cm -19° 12°C 0.75mm 0.1kPa 9505m 15m/s 12m/s
03:00
0% 11°C 1.8mm 95% 0cm -15° 12°C 1.8mm 0.07kPa 8528m 17m/s 13m/s
04:00
0% 11°C 0.26mm 94% 0cm -9.9° 12°C 3.5mm 0.08kPa 22079m 19m/s 13m/s
05:00
0% 11°C 0.66mm 95% 0cm -2.8° 12°C 4.1mm 0.08kPa 17651m 18m/s 13m/s
06:00
0% 12°C 0mm 93% 0cm 5.4° 13°C 4.4mm 0.1kPa 24134m 14m/s 11m/s
07:00
0% 11°C 0mm 91% 0cm 14° 13°C 4.6mm 0.13kPa 24134m 14m/s 10m/s
08:00
1% 11°C 0mm 89% 0cm 24° 13°C 0mm 0.16kPa 24134m 14m/s 10m/s
09:00
1% 11°C 0mm 92% 0cm 33° 13°C 0mm 0.11kPa 24135m 14m/s 9.4m/s
10:00
2% 11°C 0mm 90% 0cm 42° 13°C 0.06mm 0.15kPa 24135m 15m/s 10m/s
11:00
1% 11°C 0mm 90% 0cm 50° 13°C 0.13mm 0.15kPa 24135m 16m/s 11m/s
12:00
1% 11°C 0mm 92% 0cm 57° 13°C 0.25mm 0.13kPa 24134m 15m/s 11m/s
13:00
0% 11°C 0mm 89% 0cm 59° 13°C 0.25mm 0.17kPa 24134m 15m/s 11m/s
14:00
5% 11°C 0mm 89% 0cm 57° 13°C 0mm 0.17kPa 24134m 15m/s 11m/s
15:00
9% 11°C 0mm 88% 0cm 52° 13°C 0mm 0.17kPa 24134m 16m/s 12m/s
16:00
14% 10°C 0mm 86% 0cm 44° 13°C 0mm 0.21kPa 24134m 17m/s 12m/s
17:00
15% 11°C 0mm 87% 0cm 35° 13°C 0mm 0.19kPa 24135m 17m/s 12m/s
18:00
15% 11°C 0mm 88% 0cm 26° 13°C 0mm 0.17kPa 24134m 17m/s 12m/s
19:00
16% 11°C 0mm 88% 0cm 16° 13°C 0mm 0.18kPa 24135m 17m/s 12m/s
20:00
31% 11°C 0mm 88% 0cm 7.3° 13°C 0mm 0.18kPa 24134m 17m/s 12m/s
21:00
46% 11°C 0mm 87% 0cm -0.91° 13°C 0mm 0.19kPa 24134m 16m/s 12m/s
22:00
61% 11°C 0mm 88% 0cm -8.4° 13°C 0mm 0.18kPa 24135m 16m/s 11m/s
23:00
54% 11°C 0mm 88% 0cm -14° 13°C 0mm 0.17kPa 24135m 17m/s 11m/s
Wed, May 20 Sunrise 05:16 Sunset 20:56
24:00
48% 11°C 0mm 87% 0cm -18° 13°C 0mm 0.19kPa 24134m 17m/s 12m/s
01:00
41% 11°C 0mm 88% 0cm -19° 13°C 0mm 0.17kPa 24134m 17m/s 12m/s
02:00
35% 11°C 0mm 89% 0cm -18° 13°C 0mm 0.16kPa 24135m 15m/s 11m/s
03:00
28% 11°C 0mm 91% 0cm -15° 13°C 0mm 0.14kPa 24135m 15m/s 10m/s
04:00
22% 11°C 0mm 91% 0cm -9.7° 13°C 0mm 0.14kPa 24135m 17m/s 10m/s
05:00
18% 11°C 0mm 91% 0cm -2.7° 13°C 0mm 0.14kPa 24135m 17m/s 11m/s
06:00
15% 12°C 0mm 92% 0cm 5.5° 13°C 0mm 0.13kPa 24135m 16m/s 11m/s
07:00
11% 12°C 0mm 92% 0cm 14° 13°C 0mm 0.11kPa 24134m 15m/s 10m/s
08:00
16% 12°C 0mm 93% 0cm 24° 13°C 0mm 0.11kPa 24134m 14m/s 9.9m/s
09:00
21% 12°C 0.01mm 91% 0cm 33° 13°C 0mm 0.13kPa 24134m 13m/s 9.7m/s
10:00
26% 12°C 0.05mm 93% 0cm 42° 13°C 0.06mm 0.1kPa 24135m 13m/s 9.3m/s
11:00
23% 12°C 0mm 94% 0cm 51° 13°C 0.06mm 0.09kPa 24135m 13m/s 8.8m/s
12:00
20% 12°C 0mm 94% 0cm 57° 13°C 0.13mm 0.09kPa 24135m 13m/s 8.7m/s
13:00
17% 12°C 0mm 94% 0cm 59° 13°C 0.13mm 0.09kPa 24134m 12m/s 8.2m/s
14:00
17% 12°C 0mm 94% 0cm 58° 13°C 0mm 0.09kPa 24135m 12m/s 7.6m/s
15:00
17% 12°C 0mm 94% 0cm 52° 13°C 0mm 0.09kPa 24135m 11m/s 7.4m/s
16:00
17% 12°C 0mm 94% 0cm 44° 13°C 0mm 0.09kPa 24134m 11m/s 7.3m/s
17:00
19% 12°C 0mm 94% 0cm 35° 13°C 0mm 0.1kPa 24135m 11m/s 7.4m/s
18:00
20% 12°C 0mm 93% 0cm 26° 13°C 0mm 0.11kPa 24135m 11m/s 7.1m/s
19:00
22% 12°C 0mm 93% 0cm 16° 13°C 0mm 0.11kPa 24134m 11m/s 6.9m/s
20:00
23% 12°C 0mm 93% 0cm 7.4° 13°C 0mm 0.11kPa 24134m 9.3m/s 6.1m/s
21:00
23% 12°C 0mm 93% 0cm -0.68° 13°C 0mm 0.11kPa 24135m 8m/s 5.2m/s
22:00
24% 12°C 0mm 93% 0cm -8.2° 13°C 0mm 0.11kPa 24135m 6.7m/s 4.4m/s
23:00
16% 12°C 0mm 92% 0cm -14° 13°C 0mm 0.11kPa 24135m 6.5m/s 4.3m/s
Thu, May 21 Sunrise 05:15 Sunset 20:58
24:00
9% 12°C 0mm 92% 0cm -18° 13°C 0mm 0.11kPa 24135m 6.3m/s 4.2m/s
01:00
1% 12°C 0mm 92% 0cm -19° 13°C 0mm 0.12kPa 24135m 6.1m/s 4.1m/s
02:00
1% 12°C 0mm 92% 0cm -18° 13°C 0mm 0.12kPa 24135m 5.6m/s 3.9m/s
03:00
0% 12°C 0mm 92% 0cm -15° 13°C 0mm 0.12kPa 24135m 5.1m/s 3.6m/s
04:00
0% 12°C 0mm 92% 0cm -9.5° 13°C 0mm 0.12kPa 24135m 4.5m/s 3.4m/s
05:00
0% 12°C 0mm 91% 0cm -2.5° 13°C 0mm 0.13kPa 24135m 4.5m/s 3.5m/s
06:00
0% 12°C 0mm 90% 0cm 5.7° 13°C 0mm 0.14kPa 24135m 4.5m/s 3.6m/s
07:00
0% 12°C 0mm 90% 0cm 15° 13°C 0mm 0.16kPa 24135m 4.4m/s 3.8m/s
08:00
10% 12°C 0mm 89% 0cm 24° 13°C 0mm 0.17kPa 24135m 4.6m/s 3.9m/s
09:00
20% 12°C 0mm 88% 0cm 33° 13°C 0mm 0.19kPa 24135m 4.8m/s 4.1m/s
10:00
30% 12°C 0mm 87% 0cm 43° 14°C 0mm 0.21kPa 24135m 5m/s 4.3m/s
11:00
30% 12°C 0mm 87% 0cm 51° 14°C 0mm 0.22kPa 24135m 5.2m/s 4.5m/s
12:00
31% 12°C 0mm 86% 0cm 57° 14°C 0mm 0.23kPa 24135m 5.4m/s 4.7m/s
13:00
31% 12°C 0mm 86% 0cm 60° 15°C 0mm 0.24kPa 24135m 5.6m/s 4.9m/s
14:00
42% 12°C 0mm 86% 0cm 58° 15°C 0mm 0.23kPa 24135m 6.8m/s 5.4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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