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Rule Fog Hunter

London - Fog Hunter - London & Southeast England

London, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

No opportunities right now
Here’s what usually blocks matches

No Fog Hunter opportunities in the next 14 days

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Rule requirements (key thresholds)
Fog Probability · ≥ 75.0%

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Fog Probability 100% failing

Currently

Real-time conditions
Dewpoint Spread3.9°C
Visibility24135 (Clear)
Relative Humidity77%
Wind Speed4.0m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks the Thames Valley fog and coastal mist that create atmospheric conditions across London and Southeast England. We combine humidity, temperature, and local topography to predict when fog will transform familiar locations into moody, cinematic scenes.

London's relationship with fog is legendary—the Victorian "pea soupers" may be gone, but Thames fog still creates magical photography conditions. The river acts as a fog generator, with mist rolling across the city at dawn. Meanwhile, the North and South Downs create valley fog conditions in rural Kent, Sussex, and Surrey.

What makes Southeast England fog photography exceptional:

  • Thames fog - River mist at dawn creates moody silhouettes of Tower Bridge, St Paul's, and the Shard
  • North Downs mist - Rolling chalk hills develop valley fog that creates layered landscapes
  • South Downs valleys - Morning mist in river valleys with the Seven Sisters and Beachy Head emerging above
  • Autumn intensity - September through November brings the most reliable fog conditions as land cools

Best conditions occur at dawn along the Thames between September and November. Elevated viewpoints like Greenwich Park or Primrose Hill offer views across fog-shrouded London. In the countryside, Box Hill and Devil's Dyke provide classic chalk downland fog compositions.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 75 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 75.0%
Mon, May 18
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Tue, May 19
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Wed, May 20
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Thu, May 21
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
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 05:04 Sunset 20:50
09:00
1% 6.3°C 0mm 77% 0cm 34° 10°C 0mm 0.29kPa 24135m 7.5m/s 4m/s
10:00
1% 6°C 0.01mm 74% 0cm 43° 11°C 0.06mm 0.34kPa 24135m 6.7m/s 3.4m/s
11:00
1% 5.5°C 0mm 61% 0cm 51° 13°C 0.13mm 0.57kPa 22212m 6.1m/s 4.1m/s
12:00
0% 6.4°C 0mm 62% 0cm 56° 14°C 0.56mm 0.59kPa 14669m 5.8m/s 4m/s
13:00
0% 6.7°C 0mm 66% 0cm 58° 13°C 0.88mm 0.51kPa 17399m 5.6m/s 3.7m/s
14:00
0% 7.8°C 0mm 76% 0cm 56° 12°C 0.31mm 0.34kPa 16084m 6.3m/s 4m/s
15:00
0% 8.3°C 0mm 78% 0cm 50° 12°C 0.75mm 0.31kPa 12890m 7m/s 3.7m/s
16:00
0% 7.8°C 0mm 68% 0cm 42° 14°C 1.3mm 0.49kPa 13227m 7m/s 4.8m/s
17:00
0% 6.8°C 0mm 62% 0cm 33° 14°C 1.4mm 0.6kPa 24044m 6.9m/s 4.8m/s
18:00
0% 5.6°C 0mm 59% 0cm 24° 14°C 1.5mm 0.64kPa 24134m 6.4m/s 4.5m/s
19:00
0% 5.6°C 0.01mm 61% 0cm 15° 13°C 1.5mm 0.58kPa 24135m 6.4m/s 4m/s
20:00
2% 6°C 0mm 67% 0cm 6.1° 12°C 0mm 0.47kPa 24135m 7m/s 4.1m/s
21:00
3% 6.5°C 0mm 76% 0cm -1.9° 11°C 0mm 0.3kPa 24135m 8.2m/s 3.5m/s
22:00
5% 6.7°C 0mm 80% 0cm -8.9° 10°C 0mm 0.25kPa 24135m 8.3m/s 3.3m/s
23:00
3% 6.8°C 0mm 82% 0cm -14° 9.8°C 0mm 0.22kPa 24134m 9m/s 3.2m/s
Tue, May 19 Sunrise 05:04 Sunset 20:50
24:00
2% 6.9°C 0mm 82% 0cm -18° 9.8°C 0mm 0.22kPa 24134m 9.2m/s 3.3m/s
01:00
0% 6.8°C 0mm 80% 0cm -19° 10°C 0mm 0.25kPa 24134m 9.8m/s 3.8m/s
02:00
0% 7.7°C 0.03mm 84% 0cm -17° 10°C 0mm 0.21kPa 24134m 9.8m/s 4.2m/s
03:00
0% 8.8°C 0.33mm 89% 0cm -14° 11°C 0.19mm 0.14kPa 23235m 9.7m/s 3.9m/s
04:00
0% 9.4°C 0.43mm 94% 0cm -8.3° 10°C 0.56mm 0.08kPa 18581m 11m/s 4m/s
05:00
0% 9.5°C 0.08mm 94% 0cm -0.97° 10°C 0.88mm 0.07kPa 24134m 12m/s 4.8m/s
06:00
0% 9.7°C 1mm 96% 0cm 7.1° 10°C 1.4mm 0.06kPa 12212m 12m/s 5.2m/s
07:00
0% 10°C 1.2mm 96% 0cm 16° 11°C 2.1mm 0.05kPa 8155m 12m/s 5.5m/s
08:00
0% 10°C 0.44mm 96% 0cm 25° 11°C 0.81mm 0.05kPa 16509m 13m/s 5.9m/s
09:00
0% 11°C 0.01mm 97% 0cm 34° 11°C 1.1mm 0.04kPa 4402m 13m/s 5.8m/s
10:00
0% 12°C 0mm 97% 0cm 43° 12°C 1.1mm 0.05kPa 21559m 11m/s 4.8m/s
11:00
0% 12°C 0mm 84% 0cm 51° 15°C 1.3mm 0.26kPa 24135m 10m/s 5.4m/s
12:00
0% 12°C 0mm 72% 0cm 56° 17°C 1.6mm 0.52kPa 13568m 10m/s 6.3m/s
13:00
0% 12°C 0mm 75% 0cm 58° 16°C 2mm 0.47kPa 13457m 12m/s 6.8m/s
14:00
0% 12°C 0mm 74% 0cm 56° 16°C 0.31mm 0.47kPa 21837m 12m/s 6.8m/s
15:00
0% 11°C 0mm 69% 0cm 50° 17°C 0.56mm 0.59kPa 22404m 12m/s 7.3m/s
16:00
0% 11°C 0mm 65% 0cm 42° 17°C 0.88mm 0.69kPa 14845m 12m/s 7.2m/s
17:00
0% 11°C 0mm 66% 0cm 34° 17°C 1.2mm 0.65kPa 24135m 12m/s 6.7m/s
18:00
0% 11°C 0mm 73% 0cm 24° 16°C 1.5mm 0.48kPa 17040m 12m/s 6.8m/s
19:00
0% 11°C 0mm 78% 0cm 15° 14°C 1.8mm 0.35kPa 23913m 12m/s 6.2m/s
20:00
5% 10°C 0mm 77% 0cm 6.3° 14°C 0.06mm 0.37kPa 23921m 11m/s 5.8m/s
21:00
11% 9.7°C 0mm 80% 0cm -1.7° 13°C 0.06mm 0.3kPa 24134m 12m/s 5.8m/s
22:00
16% 9.4°C 0mm 82% 0cm -8.7° 12°C 0.06mm 0.26kPa 24135m 12m/s 5.6m/s
23:00
13% 9.1°C 0mm 84% 0cm -14° 12°C 0.06mm 0.22kPa 24135m 12m/s 5.5m/s
Wed, May 20 Sunrise 05:03 Sunset 20:51
24:00
10% 8.8°C 0mm 84% 0cm -17° 11°C 0.06mm 0.21kPa 24134m 12m/s 5.4m/s
01:00
7% 8.6°C 0mm 83% 0cm -19° 11°C 0.06mm 0.23kPa 24134m 12m/s 4.9m/s
02:00
10% 9.4°C 0mm 83% 0cm -17° 12°C 0mm 0.24kPa 24135m 13m/s 5.6m/s
03:00
14% 9°C 0mm 78% 0cm -14° 13°C 0mm 0.32kPa 24135m 12m/s 6.2m/s
04:00
17% 8.7°C 0mm 77% 0cm -8.1° 13°C 0.06mm 0.34kPa 24135m 11m/s 5.4m/s
05:00
15% 9°C 0mm 78% 0cm -0.75° 13°C 0.06mm 0.32kPa 24135m 11m/s 4.6m/s
06:00
13% 10°C 0.05mm 87% 0cm 7.2° 12°C 0.13mm 0.18kPa 24135m 12m/s 4.8m/s
07:00
11% 11°C 0.01mm 89% 0cm 16° 12°C 0.25mm 0.16kPa 24134m 12m/s 5.3m/s
08:00
13% 11°C 0mm 87% 0cm 25° 13°C 0mm 0.19kPa 24134m 12m/s 5.8m/s
09:00
16% 11°C 0mm 81% 0cm 35° 14°C 0.06mm 0.3kPa 24134m 11m/s 5.9m/s
10:00
18% 12°C 0.01mm 86% 0cm 43° 14°C 0.06mm 0.22kPa 24135m 10m/s 5.1m/s
11:00
14% 12°C 0mm 87% 0cm 51° 14°C 0.13mm 0.22kPa 24135m 11m/s 5.6m/s
12:00
10% 12°C 0mm 75% 0cm 57° 17°C 0.38mm 0.48kPa 20079m 10m/s 6.1m/s
13:00
6% 12°C 0mm 70% 0cm 59° 18°C 0.75mm 0.61kPa 22004m 10m/s 5.9m/s
14:00
6% 12°C 0mm 65% 0cm 56° 19°C 0.25mm 0.74kPa 22252m 9.8m/s 5.9m/s
15:00
7% 9.8°C 0mm 52% 0cm 50° 20°C 0.31mm 1.1kPa 24135m 9.3m/s 6.3m/s
16:00
7% 9.5°C 0mm 50% 0cm 43° 20°C 0.31mm 1.2kPa 24134m 8.9m/s 5.8m/s
17:00
6% 10°C 0mm 54% 0cm 34° 20°C 0.31mm 1.1kPa 24135m 8.2m/s 5.3m/s
18:00
6% 11°C 0mm 57% 0cm 24° 20°C 0.38mm 1kPa 24135m 7.7m/s 5.4m/s
19:00
5% 11°C 0mm 63% 0cm 15° 19°C 0.38mm 0.78kPa 24134m 7.4m/s 4.9m/s
20:00
20% 11°C 0mm 73% 0cm 6.5° 16°C 0.25mm 0.48kPa 24134m 8m/s 4.2m/s
21:00
36% 10°C 0mm 83% 0cm -1.5° 13°C 0.13mm 0.26kPa 24135m 8.5m/s 3.4m/s
22:00
51% 9.4°C 0mm 93% 0cm -8.5° 10°C 0mm 0.09kPa 24135m 9m/s 2.7m/s
23:00
42% 9.7°C 0mm 91% 0cm -14° 11°C 0mm 0.12kPa 24135m 9m/s 2.8m/s
Thu, May 21 Sunrise 05:02 Sunset 20:52
24:00
32% 10°C 0mm 89% 0cm -17° 12°C 0mm 0.15kPa 24135m 9m/s 2.9m/s
01:00
23% 10°C 0mm 87% 0cm -18° 13°C 0mm 0.19kPa 24135m 9m/s 2.9m/s
02:00
17% 11°C 0mm 79% 0cm -17° 14°C 0mm 0.34kPa 24135m 8.1m/s 3.3m/s
03:00
11% 11°C 0mm 71% 0cm -13° 16°C 0mm 0.53kPa 24135m 7.2m/s 3.7m/s
04:00
5% 11°C 0mm 63% 0cm -7.9° 18°C 0mm 0.75kPa 24135m 6.3m/s 4.1m/s
05:00
5% 11°C 0mm 59% 0cm -0.53° 19°C 0mm 0.9kPa 24135m 5.8m/s 4.1m/s
06:00
4% 11°C 0mm 55% 0cm 7.4° 20°C 0mm 1.1kPa 24135m 5.2m/s 4m/s
07:00
4% 11°C 0mm 50% 0cm 16° 21°C 0mm 1.3kPa 24135m 4.6m/s 3.9m/s
08:00
7% 11°C 0mm 50% 0cm 25° 21°C 0mm 1.3kPa 24135m 4.6m/s 4m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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