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Rule Fog Hunter

Haarlem - Fog Hunter - The Netherlands

Haarlem, North 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 Spread6.9°C
Visibility24134 (Clear)
Relative Humidity62%
Wind Speed3.9m/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%
Sun, Apr 19
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%
Mon, Apr 20
24:000%
01:000%
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03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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16:000%
17:000%
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19:000%
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22:000%
23:000%
Tue, Apr 21
24:000%
01:000%
02:000%
03:000%
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05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
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Wed, Apr 22
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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Thu, Apr 23
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
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
Mon, Apr 20 Sunrise 06:33 Sunset 20:48
10:00
61% 2.1°C 0mm 62% 0cm 30° 9°C 0mm 0.44kPa 24134m 4.6m/s 3.9m/s
11:00
42% 2.1°C 0mm 58% 0cm 38° 9.8°C 0.13mm 0.51kPa 22461m 4.7m/s 4.2m/s
12:00
37% 2.3°C 0mm 57% 0cm 44° 10°C 0.31mm 0.54kPa 24135m 4.7m/s 4.4m/s
13:00
32% 1.9°C 0mm 53% 0cm 48° 11°C 0.31mm 0.61kPa 24134m 4.8m/s 4.5m/s
14:00
27% 1.8°C 0mm 52% 0cm 49° 11°C 0.38mm 0.64kPa 24135m 5.1m/s 5m/s
15:00
35% 2.1°C 0mm 53% 0cm 46° 11°C 0mm 0.64kPa 24134m 5.7m/s 5.4m/s
16:00
42% 2.9°C 0mm 57% 0cm 41° 11°C 0.06mm 0.57kPa 24135m 6.3m/s 5.9m/s
17:00
50% 4.7°C 0mm 68% 0cm 33° 10°C 0.13mm 0.4kPa 24134m 7m/s 6.4m/s
18:00
45% 5.5°C 0mm 83% 0cm 24° 8.2°C 0.19mm 0.18kPa 24134m 7.7m/s 5.2m/s
19:00
40% 4.6°C 0.01mm 76% 0cm 15° 8.7°C 0.19mm 0.27kPa 24135m 8.3m/s 4.8m/s
20:00
35% 4.5°C 0mm 77% 0cm 6.4° 8.4°C 0.25mm 0.26kPa 24134m 8m/s 4.7m/s
21:00 ☾
30% 4.2°C 0mm 75% 0cm -2.3° 8.4°C 0mm 0.27kPa 24135m 8.1m/s 4.4m/s
22:00 ☾
25% 3.2°C 0mm 71% 0cm -10° 8°C 0mm 0.31kPa 24134m 8.8m/s 4.4m/s
23:00 ☾
20% 2.4°C 0mm 67% 0cm -17° 8.1°C 0mm 0.35kPa 24135m 8.5m/s 4.6m/s
Tue, Apr 21 Sunrise 06:33 Sunset 20:48
24:00 ☾
20% 2.2°C 0mm 68% 0cm -22° 7.6°C 0mm 0.33kPa 24135m 8.5m/s 4.9m/s
01:00 ☾
21% 2°C 0mm 72% 0cm -25° 6.6°C 0mm 0.27kPa 24134m 9.2m/s 5m/s
02:00 ☾
21% 2°C 0mm 78% 0cm -26° 5.6°C 0mm 0.2kPa 24134m 9.7m/s 5.1m/s
03:00 ☾
32% 2.3°C 0mm 80% 0cm -24° 5.4°C 0mm 0.18kPa 24135m 9.6m/s 5.1m/s
04:00 ☾
42% 2°C 0mm 80% 0cm -19° 5.2°C 0mm 0.17kPa 24134m 9.4m/s 5m/s
05:00 ☾
53% 1.6°C 0mm 78% 0cm -13° 5.2°C 0mm 0.2kPa 24135m 9.1m/s 5m/s
06:00 ☾
55% 1°C 0mm 78% 0cm -5.1° 4.5°C 0mm 0.19kPa 24135m 9.5m/s 4.9m/s
07:00
58% 0.6°C 0mm 79% 0cm 3.6° 3.9°C 0mm 0.17kPa 24134m 9.7m/s 4.7m/s
08:00
60% 0.5°C 0mm 73% 0cm 12° 5°C 0mm 0.24kPa 24134m 10m/s 5.4m/s
09:00
67% 0.1°C 0mm 65% 0cm 22° 6.2°C 0mm 0.33kPa 24135m 10m/s 6.3m/s
10:00
74% 0.1°C 0mm 60% 0cm 30° 7.4°C 0mm 0.41kPa 24134m 9.6m/s 6.6m/s
11:00
81% 0.4°C 0mm 57% 0cm 38° 8.5°C 0mm 0.48kPa 24135m 9.5m/s 6.9m/s
12:00
84% 0.6°C 0mm 53% 0cm 45° 9.6°C 0mm 0.56kPa 24134m 8.9m/s 6.8m/s
13:00
86% 0.3°C 0mm 49% 0cm 49° 11°C 0mm 0.66kPa 24134m 8.6m/s 6.9m/s
14:00
89% -0.3°C 0mm 44% 0cm 49° 12°C 0mm 0.76kPa 24134m 8.6m/s 7m/s
15:00
92% -0.4°C 0mm 42% 0cm 47° 12°C 0mm 0.82kPa 24134m 8.7m/s 7m/s
16:00
95% -0.1°C 0mm 42% 0cm 41° 12°C 0mm 0.84kPa 24135m 8.6m/s 6.8m/s
17:00
98% 0.4°C 0mm 44% 0cm 33° 12°C 0mm 0.81kPa 24134m 8.6m/s 6.8m/s
18:00
98% 1.3°C 0mm 47% 0cm 25° 12°C 0mm 0.76kPa 24134m 8.4m/s 6.4m/s
19:00
99% 2.7°C 0mm 54% 0cm 16° 12°C 0mm 0.63kPa 24134m 8.3m/s 5.7m/s
20:00
99% 3.1°C 0mm 62% 0cm 6.6° 10°C 0mm 0.48kPa 24134m 9.5m/s 5.6m/s
21:00 ☾
99% 2.8°C 0mm 68% 0cm -2.1° 8.4°C 0mm 0.36kPa 24134m 11m/s 6.2m/s
22:00 ☾
100% 2.7°C 0mm 71% 0cm -10° 7.7°C 0mm 0.31kPa 24135m 13m/s 6.2m/s
23:00 ☾
100% 2.4°C 0mm 71% 0cm -17° 7.3°C 0mm 0.3kPa 24135m 13m/s 5.7m/s
Wed, Apr 22 Sunrise 06:31 Sunset 20:49
24:00 ☾
100% 2.2°C 0mm 71% 0cm -22° 7.1°C 0mm 0.29kPa 24135m 12m/s 5.5m/s
01:00 ☾
100% 1.7°C 0mm 70% 0cm -25° 6.9°C 0mm 0.3kPa 24134m 11m/s 5.1m/s
02:00 ☾
100% 1.4°C 0mm 72% 0cm -25° 6.2°C 0mm 0.27kPa 24135m 10m/s 4.6m/s
03:00 ☾
100% 1.4°C 0mm 76% 0cm -23° 5.4°C 0mm 0.22kPa 24135m 9m/s 4m/s
04:00 ☾
100% 1.5°C 0mm 78% 0cm -19° 4.9°C 0mm 0.19kPa 24135m 8.3m/s 3.8m/s
05:00 ☾
100% 1.6°C 0mm 81% 0cm -12° 4.5°C 0mm 0.16kPa 24134m 8m/s 3.7m/s
06:00 ☾
100% 1.5°C 0mm 83% 0cm -4.8° 4.1°C 0mm 0.14kPa 24135m 7.5m/s 3.6m/s
07:00
100% 1.3°C 0mm 83% 0cm 3.9° 4°C 0mm 0.14kPa 24135m 7.1m/s 3.4m/s
08:00
100% 1.5°C 0mm 75% 0cm 13° 5.7°C 0mm 0.23kPa 24134m 7.7m/s 3.7m/s
09:00
100% 0.2°C 0mm 59% 0cm 22° 7.6°C 0mm 0.43kPa 24135m 7.6m/s 4.7m/s
10:00
100% -1.1°C 0mm 49% 0cm 31° 9°C 0mm 0.58kPa 24134m 7.9m/s 5m/s
11:00
100% -1.4°C 0mm 44% 0cm 39° 10°C 0mm 0.71kPa 24135m 7.8m/s 5.1m/s
12:00
100% -0.8°C 0mm 42% 0cm 45° 12°C 0mm 0.79kPa 24135m 7.7m/s 5.3m/s
13:00
100% -0.2°C 0mm 41% 0cm 49° 13°C 0mm 0.86kPa 24134m 6.7m/s 5m/s
14:00
100% 0.5°C 0mm 41% 0cm 50° 13°C 0mm 0.9kPa 24135m 5.8m/s 4.7m/s
15:00
100% 2.7°C 0mm 54% 0cm 47° 12°C 0mm 0.64kPa 24135m 6.5m/s 5.2m/s
16:00
100% 4.2°C 0mm 66% 0cm 41° 10°C 0mm 0.42kPa 24135m 7.1m/s 5.7m/s
17:00
100% 5.1°C 0mm 79% 0cm 34° 8.6°C 0mm 0.23kPa 24135m 7.7m/s 6.1m/s
18:00
100% 5.4°C 0mm 80% 0cm 25° 8.5°C 0mm 0.22kPa 24135m 7.3m/s 5.9m/s
19:00
100% 5.6°C 0mm 82% 0cm 16° 8.5°C 0mm 0.2kPa 24135m 6.9m/s 5.6m/s
20:00
100% 5.8°C 0mm 83% 0cm 6.9° 8.5°C 0mm 0.19kPa 24135m 6.5m/s 5.3m/s
21:00 ☾
97% 5.1°C 0mm 78% 0cm -1.8° 8.7°C 0mm 0.25kPa 24135m 6.7m/s 5.5m/s
22:00 ☾
94% 4.4°C 0mm 73% 0cm -9.9° 8.9°C 0mm 0.31kPa 24135m 6.9m/s 5.8m/s
23:00 ☾
91% 3.5°C 0mm 68% 0cm -17° 9.1°C 0mm 0.37kPa 24135m 7m/s 6m/s
Thu, Apr 23 Sunrise 06:29 Sunset 20:51
24:00 ☾
90% 3.8°C 0mm 69% 0cm -22° 9.1°C 0mm 0.36kPa 24135m 8m/s 6.7m/s
01:00 ☾
90% 4°C 0mm 70% 0cm -25° 9.2°C 0mm 0.35kPa 24135m 8.9m/s 7.3m/s
02:00 ☾
89% 4.3°C 0mm 71% 0cm -25° 9.3°C 0mm 0.34kPa 24135m 9.8m/s 7.9m/s
03:00 ☾
89% 4.7°C 0mm 73% 0cm -23° 9.2°C 0mm 0.31kPa 24135m 9.9m/s 8.2m/s
04:00 ☾
89% 5.1°C 0mm 76% 0cm -18° 9.2°C 0mm 0.28kPa 24135m 10m/s 8.5m/s
05:00 ☾
89% 5.5°C 0mm 78% 0cm -12° 9.1°C 0mm 0.25kPa 24135m 10m/s 8.8m/s
06:00 ☾
89% 5.7°C 0mm 79% 0cm -4.5° 9.1°C 0mm 0.24kPa 24135m 10m/s 9m/s
07:00
88% 5.9°C 0mm 80% 0cm 4.1° 9.1°C 0mm 0.23kPa 24135m 11m/s 9.2m/s
08:00
88% 6°C 0mm 81% 0cm 13° 9.1°C 0mm 0.22kPa 24135m 11m/s 9.4m/s
09:00
83% 6°C 0mm 80% 0cm 22° 9.2°C 0mm 0.23kPa 24135m 11m/s 9.6m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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