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Rule Fog Hunter

Leiden - Fog Hunter - The Netherlands

Leiden, South Holland, The Netherlands

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 · ≥ 60.0%

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
Fog Probability
0%
Dewpoint Spread6.5°C
Visibility24135 (Clear)
Relative Humidity64%
Wind Speed3.4m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Amsterdam

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

The Netherlands' unique below-sea-level geography creates exceptional fog conditions as the polder landscape—land reclaimed from the sea—traps cold, moist air in natural depressions. This creates persistent valley fog and radiation fog that transforms windmills and waterways into ethereal scenes.

Kinderdijk's 19 UNESCO windmills rising from morning mist create one of photography's most iconic Dutch scenes. The flat terrain and extensive water networks mean fog forms readily on calm, clear nights and can persist well into morning. Marken's historic harbor on the Markermeer lake experiences frequent sea fog rolling in from the IJsselmeer.

What makes Dutch fog photography exceptional:

  • Windmill emergence - Historic structures appearing gradually as fog lifts from polder basins
  • Canal diffusion - Amsterdam and Leiden's canals create soft, atmospheric street scenes in fog
  • Flat persistence - Lack of topography means fog lingers longer than in hilly regions
  • Autumn reliability - October-November offer most consistent radiation fog conditions

Best fog occurs on calm, clear nights following daytime warmth—typically spring and autumn. Arrive before sunrise to catch densest conditions. The polders around Kinderdijk, Zaanse Schans windmills north of Amsterdam, and the Alblasserwaard region are prime locations. Fog typically burns off by 10-11 AM as temperatures rise.

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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/Amsterdam
Fog Probability
≥ 60.0%
Wed, Apr 8
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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Thu, Apr 9
24:000%
01:000%
02:000%
03:000%
04:000%
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06:000%
07:000%
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Fri, Apr 10
24:000%
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05:000%
06:000%
07:000%
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Sat, Apr 11
24:000%
01:000%
02:000%
03:000%
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06:000%
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21:000%
22:000%
23:000%
Sun, Apr 12
24:000%
01:000%
02:000%
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/Amsterdam
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
Thu, Apr 9 Sunrise 06:58 Sunset 20:29
04:00 ☾
1% 3.6°C 0mm 64% 0cm -24° 10°C 0mm 0.45kPa 24135m 6m/s 3.4m/s
05:00 ☾
2% 3.7°C 0mm 65% 0cm -17° 9.9°C 0mm 0.42kPa 24135m 5.6m/s 3.3m/s
06:00 ☾
2% 3.9°C 0mm 68% 0cm -9.3° 9.6°C 0mm 0.39kPa 24135m 5.5m/s 3.2m/s
07:00
1% 4.2°C 0mm 70% 0cm -0.11° 9.4°C 0mm 0.35kPa 24134m 5.6m/s 3.4m/s
08:00
1% 4.7°C 0mm 71% 0cm 8.6° 9.7°C 0mm 0.35kPa 24134m 5.7m/s 3.4m/s
09:00
2% 5.5°C 0mm 70% 0cm 18° 11°C 0mm 0.39kPa 24134m 5.7m/s 3.7m/s
10:00
4% 6.1°C 0mm 65% 0cm 26° 12°C 0mm 0.5kPa 24135m 5.2m/s 3.7m/s
11:00
5% 6.4°C 0mm 60% 0cm 34° 14°C 0mm 0.65kPa 24134m 5.3m/s 3.8m/s
12:00
6% 7.1°C 0mm 57% 0cm 41° 16°C 0mm 0.77kPa 24135m 5.6m/s 3.7m/s
13:00
8% 8.2°C 0mm 58% 0cm 45° 16°C 0mm 0.77kPa 24135m 6m/s 3.9m/s
14:00
9% 8.9°C 0mm 63% 0cm 45° 16°C 0mm 0.68kPa 24135m 6.4m/s 4.4m/s
15:00
7% 9.4°C 0mm 66% 0cm 43° 16°C 0mm 0.6kPa 24135m 6.9m/s 5m/s
16:00
5% 9.8°C 0mm 71% 0cm 38° 15°C 0mm 0.49kPa 11936m 7.7m/s 5.3m/s
17:00
3% 10°C 0mm 78% 0cm 30° 14°C 0.19mm 0.36kPa 6061m 6.9m/s 4.5m/s
18:00
2% 10°C 0mm 84% 0cm 22° 13°C 0.5mm 0.24kPa 11884m 7.3m/s 4.3m/s
19:00
1% 9.8°C 0mm 83% 0cm 13° 13°C 0.5mm 0.24kPa 24134m 6.7m/s 3.4m/s
20:00
0% 10°C 0mm 85% 0cm 3.8° 13°C 0.69mm 0.22kPa 7976m 7m/s 4.1m/s
21:00 ☾
0% 11°C 0.02mm 92% 0cm -5.2° 12°C 0.44mm 0.11kPa 19942m 7.8m/s 4.5m/s
22:00 ☾
0% 9.8°C 0.23mm 92% 0cm -13° 11°C 0.75mm 0.1kPa 23980m 9.3m/s 4.5m/s
23:00 ☾
0% 8.2°C 0.07mm 90% 0cm -21° 9.8°C 0.81mm 0.12kPa 24134m 13m/s 10m/s
Fri, Apr 10 Sunrise 06:58 Sunset 20:29
24:00 ☾
0% 6.4°C 0mm 84% 0cm -26° 8.9°C 0.88mm 0.18kPa 24135m 13m/s 7.5m/s
01:00 ☾
0% 6.2°C 0mm 84% 0cm -29° 8.8°C 0.88mm 0.18kPa 24134m 11m/s 6m/s
02:00 ☾
0% 6.2°C 0mm 84% 0cm -30° 8.8°C 0.88mm 0.18kPa 24135m 11m/s 7.6m/s
03:00 ☾
12% 5.4°C 0mm 80% 0cm -28° 8.6°C 0mm 0.22kPa 24134m 10m/s 7.6m/s
04:00 ☾
25% 4.8°C 0mm 78% 0cm -23° 8.3°C 0mm 0.24kPa 24134m 10m/s 8m/s
05:00 ☾
37% 3.9°C 0mm 75% 0cm -17° 8°C 0mm 0.26kPa 24135m 10m/s 7.9m/s
06:00 ☾
30% 2.7°C 0mm 70% 0cm -8.9° 7.8°C 0mm 0.32kPa 24134m 9.2m/s 7.3m/s
07:00
22% 2°C 0mm 68% 0cm 0.23° 7.6°C 0mm 0.34kPa 24134m 8.7m/s 6.8m/s
08:00
15% 2.2°C 0mm 69% 0cm 8.9° 7.6°C 0mm 0.33kPa 24135m 7.1m/s 5.8m/s
09:00
10% 2.6°C 0mm 70% 0cm 18° 7.7°C 0mm 0.32kPa 24134m 5.5m/s 4.6m/s
10:00
5% 2.6°C 0mm 69% 0cm 27° 7.9°C 0mm 0.33kPa 24134m 5.1m/s 4.4m/s
11:00
0% 2.4°C 0mm 67% 0cm 35° 8.2°C 0mm 0.36kPa 24135m 3.3m/s 3.1m/s
12:00
0% 2.3°C 0mm 65% 0cm 41° 8.5°C 0mm 0.39kPa 24135m 2.8m/s 3m/s
13:00
0% 2.2°C 0mm 64% 0cm 45° 8.5°C 0mm 0.39kPa 24134m 2.1m/s 2.9m/s
14:00
0% 2.1°C 0mm 64% 0cm 46° 8.6°C 0mm 0.41kPa 24134m 1.7m/s 2.7m/s
15:00
12% 2.1°C 0mm 63% 0cm 43° 8.7°C 0mm 0.41kPa 24134m 2.4m/s 3.4m/s
16:00
25% 2.2°C 0mm 64% 0cm 38° 8.7°C 0mm 0.41kPa 24134m 2.7m/s 3.7m/s
17:00
37% 2.1°C 0mm 64% 0cm 31° 8.5°C 0mm 0.4kPa 24134m 1.8m/s 3.1m/s
18:00
30% 2°C 0mm 64% 0cm 22° 8.3°C 0mm 0.39kPa 24134m 1.6m/s 2.8m/s
19:00
24% 1.9°C 0mm 64% 0cm 13° 8.3°C 0mm 0.39kPa 24135m 2m/s 2.4m/s
20:00
17% 1.9°C 0mm 63% 0cm 4.1° 8.5°C 0mm 0.41kPa 24135m 2.7m/s 2.1m/s
21:00 ☾
11% 2.5°C 0mm 65% 0cm -5° 8.8°C 0mm 0.4kPa 24135m 3.8m/s 2.2m/s
22:00 ☾
6% 3°C 0mm 67% 0cm -13° 8.7°C 0mm 0.37kPa 24134m 5.1m/s 2.9m/s
23:00 ☾
0% 2.5°C 0mm 67% 0cm -20° 8.3°C 0mm 0.36kPa 24135m 6.8m/s 3.6m/s
Sat, Apr 11 Sunrise 06:56 Sunset 20:31
24:00 ☾
0% 2.5°C 0mm 68% 0cm -26° 8.1°C 0mm 0.35kPa 24134m 8.4m/s 4.1m/s
01:00 ☾
0% 2.3°C 0mm 66% 0cm -29° 8.2°C 0mm 0.37kPa 24135m 11m/s 4.3m/s
02:00 ☾
0% 1.9°C 0mm 64% 0cm -29° 8.4°C 0mm 0.4kPa 24134m 12m/s 5.2m/s
03:00 ☾
0% 1.6°C 0mm 63% 0cm -27° 8.3°C 0mm 0.41kPa 24134m 12m/s 5.1m/s
04:00 ☾
0% 1.5°C 0mm 63% 0cm -23° 8.2°C 0mm 0.4kPa 24134m 12m/s 5.1m/s
05:00 ☾
0% 1.6°C 0mm 64% 0cm -16° 8.1°C 0mm 0.39kPa 24135m 12m/s 5.7m/s
06:00 ☾
0% 2.1°C 0mm 66% 0cm -8.6° 8.2°C 0mm 0.37kPa 24135m 12m/s 5.7m/s
07:00
0% 2.5°C 0mm 67% 0cm 0.52° 8.3°C 0mm 0.36kPa 24135m 12m/s 5.8m/s
08:00
0% 2.9°C 0mm 68% 0cm 9.3° 8.6°C 0mm 0.36kPa 24135m 12m/s 5.9m/s
09:00
2% 5.3°C 0.13mm 75% 0cm 18° 9.6°C 0.54mm 0.3kPa 23579m 12m/s 6.3m/s
10:00
3% 7.5°C 0.26mm 82% 0cm 27° 11°C 1.1mm 0.23kPa 23023m 12m/s 6.7m/s
11:00
5% 9.7°C 0.39mm 89% 0cm 35° 11°C 1.6mm 0.15kPa 22467m 12m/s 7.1m/s
12:00
4% 8.5°C 0.26mm 85% 0cm 41° 11°C 1.8mm 0.19kPa 23023m 12m/s 6.9m/s
13:00
4% 7.2°C 0.13mm 81% 0cm 45° 10°C 2mm 0.23kPa 23579m 12m/s 6.6m/s
14:00
3% 5.9°C 0mm 77% 0cm 46° 9.7°C 2.1mm 0.27kPa 24135m 12m/s 6.4m/s
15:00
4% 5.4°C 0.003mm 78% 0cm 44° 9.1°C 1.4mm 0.26kPa 24135m 10m/s 5.2m/s
16:00
4% 4.9°C 0.007mm 78% 0cm 38° 8.5°C 0.71mm 0.24kPa 24135m 9.1m/s 4m/s
17:00
5% 4.4°C 0.01mm 79% 0cm 31° 7.9°C 0mm 0.23kPa 24135m 7.8m/s 2.8m/s
18:00
3% 3.8°C 0.007mm 76% 0cm 22° 7.7°C 0mm 0.25kPa 24135m 8.4m/s 3.3m/s
19:00
2% 3.1°C 0.003mm 74% 0cm 13° 7.5°C 0mm 0.27kPa 24135m 8.9m/s 3.7m/s
20:00
0% 2.5°C 0mm 71% 0cm 4.3° 7.3°C 0mm 0.29kPa 24135m 9.5m/s 4.1m/s
21:00 ☾
0% 2.1°C 0mm 72% 0cm -4.7° 6.9°C 0mm 0.28kPa 24135m 9.9m/s 4.2m/s
22:00 ☾
0% 1.8°C 0mm 72% 0cm -13° 6.5°C 0mm 0.27kPa 24135m 10m/s 4.2m/s
23:00 ☾
0% 1.4°C 0mm 72% 0cm -20° 6.1°C 0mm 0.26kPa 24135m 11m/s 4.3m/s
Sun, Apr 12 Sunrise 06:54 Sunset 20:32
24:00 ☾
0% 1.4°C 0mm 72% 0cm -25° 6°C 0mm 0.26kPa 24135m 11m/s 4.4m/s
01:00 ☾
0% 1.4°C 0mm 73% 0cm -29° 5.9°C 0mm 0.25kPa 24135m 11m/s 4.5m/s
02:00 ☾
0% 1.3°C 0mm 73% 0cm -29° 5.8°C 0mm 0.25kPa 24135m 11m/s 4.6m/s
03:00 ☾
1% 1.8°C 0mm 70% 0cm -27° 6.9°C 0mm 0.3kPa 24135m 10m/s 5.1m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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