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Rule Fog Hunter

Fog Hunter Forecast for Guildford, London & Southeast England

Guildford, England, United Kingdom

Guildford's River Wey, historic High Street, and castle grounds sit near wooded Surrey Hills and chalk downs suited to layered rural views.

Currently

Real-time conditions
Fog Probability
0%
Dewpoint Spread1.4°C
Visibility24135 (Clear)
Relative Humidity92%
Wind Speed4.3m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (74-hour forecast)

  • Fog Probability100% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Fog Hunter conditions across London & Southeast England. The requirements and hourly values below show how those signals apply at Guildford.

Explore Fog Hunter conditions across London & Southeast England →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Guildford during the last 365 days.

Last 30 days
0
recorded matching windows
Last 90 days
2
recorded matching windows · 82% average confidence
Last 365 days
2
recorded matching windows · 82% average confidence

Only 2 completed matches are recorded in the last 365 days—insufficient history to identify a reliable typical start time or month.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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74-hour requirements breakdown

When available, the detailed table below covers only the stated 74-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour
0matching hours in the next 74 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 75.0%
Tue, Aug 18
05:000%
06:000%
07:0018%
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, Aug 19
24:000%
01:000%
02:000%
03:000%
04:0030%
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, Aug 20
24:000%
01:000%
02:000%
03:000%
04:000%
05:0055%
06:0055%
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%
Fri, Aug 21
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
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
Tue, Aug 18 Sunrise 05:53 Sunset 20:17
09:00
0% 17°C 0mm 92% 0cm 28° 18°C 0mm 0.17kPa 24135m 7.5m/s 4.3m/s
10:00
0% 17°C 0.01mm 90% 0cm 37° 19°C 0.06mm 0.22kPa 24135m 7.3m/s 4.3m/s
11:00
0% 17°C 0mm 86% 0cm 44° 20°C 0.19mm 0.32kPa 24107m 6.3m/s 4m/s
12:00
0% 17°C 0mm 74% 0cm 50° 21°C 0.25mm 0.66kPa 24134m 6.9m/s 4.4m/s
13:00
0% 14°C 0mm 54% 0cm 52° 24°C 0.31mm 1.4kPa 24135m 8.2m/s 6.6m/s
14:00
0% 11°C 0mm 41% 0cm 50° 25°C 0mm 1.9kPa 24134m 9.2m/s 6.7m/s
15:00
0% 9.1°C 0mm 34% 0cm 45° 26°C 0mm 2.2kPa 24135m 9m/s 6.9m/s
16:00
0% 8.4°C 0mm 34% 0cm 38° 25°C 0mm 2.1kPa 24135m 8.8m/s 6.9m/s
17:00
0% 7.9°C 0mm 33% 0cm 30° 25°C 0mm 2.2kPa 24134m 9m/s 7.5m/s
18:00
0% 8.3°C 0mm 36% 0cm 20° 24°C 0mm 1.9kPa 24135m 8.5m/s 6.6m/s
19:00
0% 8.3°C 0mm 38% 0cm 11° 23°C 0mm 1.8kPa 24135m 7.9m/s 5.6m/s
20:00
4% 8.8°C 0mm 44% 0cm 2.1° 21°C 0mm 1.4kPa 24134m 8.4m/s 5.1m/s
21:00 ☾
7% 9.4°C 0mm 52% 0cm -6.7° 20°C 0mm 1.1kPa 24134m 8.7m/s 4.4m/s
22:00 ☾
11% 10°C 0mm 58% 0cm -14° 19°C 0mm 0.9kPa 24134m 8.7m/s 4.8m/s
23:00 ☾
8% 11°C 0mm 67% 0cm -20° 18°C 0mm 0.67kPa 24135m 9.3m/s 4.5m/s
Wed, Aug 19 Sunrise 05:53 Sunset 20:17
24:00 ☾
5% 11°C 0mm 68% 0cm -24° 17°C 0mm 0.63kPa 24134m 8.4m/s 4.1m/s
01:00 ☾
2% 11°C 0mm 69% 0cm -26° 17°C 0mm 0.6kPa 24135m 7.2m/s 3.9m/s
02:00 ☾
1% 12°C 0.09mm 80% 0cm -25° 16°C 0.06mm 0.36kPa 24135m 5.4m/s 2.9m/s
03:00 ☾
1% 13°C 0.6mm 90% 0cm -21° 15°C 0.25mm 0.17kPa 13678m 6.4m/s 2.9m/s
04:00 ☾
0% 14°C 0.04mm 95% 0cm -16° 14°C 0.88mm 0.08kPa 23826m 7.8m/s 3m/s
05:00 ☾
0% 14°C 0mm 93% 0cm -8.4° 15°C 1.1mm 0.11kPa 23487m 9.7m/s 3.3m/s
06:00
0% 13°C 0mm 91% 0cm 0.43° 15°C 1.2mm 0.15kPa 24135m 10m/s 3.8m/s
07:00
0% 13°C 0mm 90% 0cm 9.1° 15°C 1.2mm 0.17kPa 24134m 9.4m/s 4.3m/s
08:00
3% 13°C 0mm 86% 0cm 18° 16°C 0mm 0.25kPa 24134m 7.7m/s 5.1m/s
09:00
5% 12°C 0mm 74% 0cm 28° 17°C 0mm 0.51kPa 24134m 6.2m/s 5m/s
10:00
8% 11°C 0mm 60% 0cm 36° 19°C 0mm 0.84kPa 24135m 5.5m/s 4.5m/s
11:00
9% 9.5°C 0mm 48% 0cm 44° 21°C 0mm 1.3kPa 24134m 6.3m/s 4.6m/s
12:00
10% 10°C 0mm 46% 0cm 49° 22°C 0.06mm 1.5kPa 21481m 7.2m/s 5.7m/s
13:00
11% 9.9°C 0mm 44% 0cm 51° 23°C 0.13mm 1.5kPa 24135m 7.9m/s 6.6m/s
14:00
16% 9.9°C 0mm 45% 0cm 50° 22°C 0mm 1.5kPa 24134m 8.4m/s 6.7m/s
15:00
22% 10°C 0mm 47% 0cm 45° 22°C 0.06mm 1.4kPa 24075m 8.3m/s 5.9m/s
16:00
27% 11°C 0mm 50% 0cm 38° 22°C 0.19mm 1.3kPa 16908m 8.2m/s 6.5m/s
17:00
29% 12°C 0mm 61% 0cm 29° 19°C 0.25mm 0.88kPa 24135m 8.2m/s 4.9m/s
18:00
32% 12°C 0mm 61% 0cm 20° 20°C 0.63mm 0.91kPa 23922m 7.7m/s 5.6m/s
19:00
34% 13°C 0mm 69% 0cm 11° 19°C 0.94mm 0.67kPa 21924m 8m/s 4.9m/s
20:00
47% 12°C 0mm 78% 0cm 1.8° 16°C 0.19mm 0.41kPa 24090m 4m/s 2.9m/s
21:00 ☾
61% 12°C 0mm 81% 0cm -7° 15°C 0.19mm 0.31kPa 24135m 2.4m/s 2.4m/s
22:00 ☾
74% 11°C 0mm 82% 0cm -15° 14°C 0.19mm 0.28kPa 24134m 2.3m/s 2.3m/s
23:00 ☾
76% 9.7°C 0mm 82% 0cm -21° 13°C 0.19mm 0.27kPa 24135m 2.5m/s 2.5m/s
Thu, Aug 20 Sunrise 05:55 Sunset 20:15
24:00 ☾
78% 9.1°C 0mm 82% 0cm -25° 12°C 0.19mm 0.25kPa 24134m 2.2m/s 2.2m/s
01:00 ☾
80% 9.4°C 0mm 86% 0cm -26° 12°C 0.19mm 0.19kPa 24135m 3.7m/s 2.6m/s
02:00 ☾
79% 9.9°C 0mm 91% 0cm -25° 11°C 0mm 0.12kPa 24135m 5.5m/s 2.8m/s
03:00 ☾
78% 9.9°C 0mm 93% 0cm -22° 11°C 0mm 0.09kPa 24135m 5.1m/s 2.6m/s
04:00 ☾
77% 9.9°C 0mm 94% 0cm -16° 11°C 0mm 0.07kPa 24134m 3.8m/s 2.4m/s
05:00 ☾
74% 9.9°C 0mm 95% 0cm -8.6° 11°C 0mm 0.06kPa 24134m 3.7m/s 2.3m/s
06:00
72% 9.9°C 0mm 96% 0cm 0.23° 11°C 0mm 0.06kPa 24135m 3.6m/s 2.2m/s
07:00
69% 11°C 0mm 94% 0cm 8.9° 12°C 0mm 0.09kPa 24135m 8.3m/s 2.2m/s
08:00
71% 12°C 0mm 83% 0cm 18° 15°C 0mm 0.29kPa 24134m 8.2m/s 4m/s
09:00
72% 12°C 0mm 71% 0cm 27° 17°C 0mm 0.56kPa 24134m 6.8m/s 4.5m/s
10:00
74% 10°C 0mm 57% 0cm 36° 19°C 0mm 0.93kPa 24135m 6.7m/s 5.1m/s
11:00
71% 8.7°C 0.01mm 46% 0cm 44° 21°C 0mm 1.3kPa 24135m 7.1m/s 5.6m/s
12:00
69% 7.8°C 0mm 41% 0cm 49° 22°C 0mm 1.5kPa 24135m 7.2m/s 5.5m/s
13:00
66% 7.5°C 0mm 42% 0cm 51° 21°C 0mm 1.5kPa 24135m 7.3m/s 6m/s
14:00
52% 8°C 0mm 46% 0cm 50° 20°C 0mm 1.3kPa 24135m 7.3m/s 5.1m/s
15:00
39% 8.2°C 0mm 50% 0cm 45° 19°C 0mm 1.1kPa 24135m 7.3m/s 4.2m/s
16:00
25% 8.4°C 0mm 55% 0cm 38° 18°C 0mm 0.91kPa 24135m 7.3m/s 3.3m/s
17:00
27% 9.2°C 0.007mm 60% 0cm 29° 17°C 0mm 0.76kPa 24135m 5.7m/s 2.8m/s
18:00
28% 9.8°C 0.01mm 66% 0cm 20° 16°C 0mm 0.62kPa 24135m 4.1m/s 2.4m/s
19:00
30% 10°C 0.02mm 72% 0cm 10° 15°C 0mm 0.5kPa 24135m 2.4m/s 1.9m/s
20:00
38% 11°C 0.01mm 76% 0cm 1.6° 15°C 0.17mm 0.41kPa 21422m 3m/s 2m/s
21:00 ☾
47% 11°C 0.007mm 80% 0cm -7.3° 15°C 0.33mm 0.33kPa 18710m 3.5m/s 2m/s
22:00 ☾
55% 12°C 0mm 84% 0cm -15° 14°C 0.5mm 0.26kPa 15997m 4.1m/s 2.1m/s
23:00 ☾
57% 12°C 0.04mm 87% 0cm -21° 14°C 0.77mm 0.21kPa 15879m 5.3m/s 2.7m/s
Fri, Aug 21 Sunrise 05:56 Sunset 20:13
24:00 ☾
58% 12°C 0.07mm 90% 0cm -25° 14°C 1mm 0.17kPa 15761m 6.6m/s 3.2m/s
01:00 ☾
60% 12°C 0.11mm 92% 0cm -27° 14°C 1.3mm 0.12kPa 15644m 7.8m/s 3.8m/s
02:00 ☾
51% 12°C 0.07mm 87% 0cm -25° 14°C 0.98mm 0.22kPa 18474m 7.3m/s 4.4m/s
03:00 ☾
42% 12°C 0.04mm 81% 0cm -22° 15°C 0.65mm 0.32kPa 21305m 6.9m/s 4.9m/s
04:00 ☾
33% 12°C 0mm 76% 0cm -16° 16°C 0.31mm 0.43kPa 24135m 6.4m/s 5.5m/s
05:00 ☾
28% 11°C 0mm 69% 0cm -8.9° 17°C 0.5mm 0.6kPa 23445m 6m/s 5.5m/s
06:00
24% 11°C 0mm 62% 0cm 0.04° 18°C 0.69mm 0.79kPa 22754m 5.6m/s 5.5m/s
07:00
19% 9.9°C 0mm 55% 0cm 8.6° 19°C 0.88mm 1kPa 22063m 5.2m/s 5.6m/s
08:00
20% 9.5°C 0.01mm 53% 0cm 18° 19°C 0.85mm 1.1kPa 22754m 5.2m/s 5.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

How opportunities work → Weather data sources →
Forecast generated

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