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Rule Fog Hunter

Porvoo - Fog Hunter - Southern Finland

Porvoo, Uusimaa, Finland

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
Fog Probability
0%
Dewpoint Spread2.5°C
Visibility24134 (Clear)
Relative Humidity86%
Wind Speed4.2m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

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

Southern Finland's lake district and boreal forests create ideal conditions for fog photography. The region's 188,000 lakes, countless bogs, and mixed forests generate reliable morning mist from late summer through autumn.

What makes Southern Finland special for fog photography:

  • Lake fog - Large lakes like Vesijärvi and Saimaa produce dramatic ground fog at dawn
  • Bog mist - Torronsuo and other wetlands create ethereal low-lying fog over boardwalks
  • Forest atmosphere - Nuuksio and Repovesi offer misty woodland scenes with cliff viewpoints
  • Accessibility - Most locations within 2 hours of Helsinki

Peak fog season runs from August through October, with the strongest conditions occurring on calm, clear nights when temperatures drop near the dewpoint. Arrive before sunrise for the most dramatic mist.

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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/Helsinki
Fog Probability
≥ 75.0%
Fri, Jun 5
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%
Sat, Jun 6
24:000%
01:000%
02:000%
03:000%
04:0044%
05:0069%
06:0058%
07:0059%
08:0043%
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%
22:0069%
23:0033%
Sun, Jun 7
24:000%
01:000%
02:000%
03:0064%
04:0064%
05:0062%
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%
Mon, Jun 8
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%
Tue, Jun 9
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
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/Helsinki
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
Sat, Jun 6 Sunrise 03:56 Sunset 22:36
11:00
0% 15°C 0mm 86% 0cm 45° 18°C 0.06mm 0.29kPa 24134m 7.6m/s 4.2m/s
12:00
0% 15°C 0.03mm 92% 0cm 50° 16°C 0.13mm 0.14kPa 24135m 8.3m/s 3.9m/s
13:00
0% 14°C 0.01mm 93% 0cm 52° 15°C 0.19mm 0.12kPa 24135m 9.8m/s 3.5m/s
14:00
0% 14°C 0.01mm 90% 0cm 52° 16°C 0.38mm 0.19kPa 22544m 10m/s 3.7m/s
15:00
0% 15°C 0.37mm 86% 0cm 48° 17°C 0.75mm 0.27kPa 15868m 8.6m/s 4.1m/s
16:00
0% 14°C 7.6mm 98% 0cm 43° 14°C 3.9mm 0.03kPa 609m 11m/s 3.5m/s
17:00
0% 14°C 0.56mm 99% 0cm 36° 15°C 6.9mm 0.02kPa 199m 8.6m/s 3m/s
18:00
0% 15°C 0.81mm 98% 0cm 29° 15°C 7.6mm 0.03kPa 325m 8.2m/s 2.7m/s
19:00
0% 15°C 0.51mm 98% 0cm 22° 15°C 8.6mm 0.03kPa 213m 8.8m/s 2.9m/s
20:00
0% 14°C 0.02mm 96% 0cm 14° 15°C 8.7mm 0.06kPa 24134m 9.2m/s 4m/s
21:00
0% 12°C 0mm 96% 0cm 7.9° 13°C 8.8mm 0.06kPa 22677m 9.2m/s 3.7m/s
22:00
7% 11°C 0mm 98% 0cm 2.4° 11°C 0mm 0.03kPa 396m 9m/s 3.5m/s
23:00 ☾
15% 11°C 0.01mm 96% 0cm -2.3° 12°C 0mm 0.05kPa 24135m 11m/s 4.9m/s
Sun, Jun 7 Sunrise 03:56 Sunset 22:36
24:00 ☾
22% 11°C 0mm 93% 0cm -5.4° 12°C 0.06mm 0.1kPa 24135m 12m/s 5m/s
01:00 ☾
25% 11°C 0mm 92% 0cm -6.8° 12°C 0.06mm 0.1kPa 24134m 13m/s 3.8m/s
02:00 ☾
27% 11°C 0mm 94% 0cm -6.3° 12°C 0.06mm 0.08kPa 24134m 11m/s 3.1m/s
03:00 ☾
30% 9.9°C 0mm 98% 0cm -4.1° 10°C 0.06mm 0.02kPa 24134m 11m/s 2.9m/s
04:00
38% 9.7°C 0mm 98% 0cm 0.09° 9.9°C 0mm 0.02kPa 24134m 11m/s 2.9m/s
05:00
46% 9.8°C 0mm 98% 0cm 4.8° 10°C 0mm 0.03kPa 24135m 11m/s 3.1m/s
06:00
54% 10°C 0mm 94% 0cm 11° 11°C 0mm 0.08kPa 24134m 11m/s 3.2m/s
07:00
58% 11°C 0mm 88% 0cm 18° 12°C 0mm 0.17kPa 24134m 9.8m/s 3.3m/s
08:00
61% 11°C 0mm 80% 0cm 25° 14°C 0mm 0.31kPa 24135m 7.8m/s 3.7m/s
09:00
65% 10°C 0mm 70% 0cm 32° 16°C 0mm 0.54kPa 24135m 7.4m/s 3.9m/s
10:00
74% 10°C 0mm 62% 0cm 39° 17°C 0mm 0.74kPa 24135m 7m/s 4m/s
11:00
82% 9.7°C 0mm 57% 0cm 46° 18°C 0mm 0.91kPa 24134m 7.1m/s 4.3m/s
12:00
91% 9.2°C 0mm 52% 0cm 50° 19°C 0mm 1.1kPa 24135m 6.9m/s 4.5m/s
13:00
91% 8.6°C 0mm 48% 0cm 52° 20°C 0mm 1.2kPa 24135m 7m/s 4.5m/s
14:00
92% 8.4°C 0mm 45% 0cm 52° 21°C 0mm 1.4kPa 24135m 7.4m/s 4.4m/s
15:00
92% 8°C 0mm 42% 0cm 48° 21°C 0mm 1.4kPa 24135m 7.7m/s 4.5m/s
16:00
90% 7.7°C 0mm 42% 0cm 43° 21°C 0mm 1.4kPa 24134m 8.2m/s 4.8m/s
17:00
89% 7.9°C 0mm 45% 0cm 36° 20°C 0mm 1.3kPa 24135m 7.5m/s 4.6m/s
18:00
87% 7.8°C 0mm 47% 0cm 29° 19°C 0mm 1.2kPa 24135m 6.9m/s 4.2m/s
19:00
87% 8°C 0mm 50% 0cm 22° 18°C 0mm 1.1kPa 24135m 6.9m/s 3.7m/s
20:00
88% 9.1°C 0mm 60% 0cm 15° 17°C 0mm 0.78kPa 24134m 6.3m/s 2.8m/s
21:00
88% 9.3°C 0mm 69% 0cm 8° 15°C 0mm 0.52kPa 24135m 6.1m/s 2.4m/s
22:00
84% 8.9°C 0mm 79% 0cm 2.5° 12°C 0mm 0.3kPa 24134m 5m/s 2.1m/s
23:00 ☾
81% 8.1°C 0mm 83% 0cm -2.2° 11°C 0mm 0.22kPa 24134m 3m/s 2m/s
Mon, Jun 8 Sunrise 03:55 Sunset 22:37
24:00 ☾
77% 7.7°C 0mm 84% 0cm -5.3° 10°C 0mm 0.2kPa 24134m 1.7m/s 1.7m/s
01:00 ☾
73% 7.5°C 0mm 84% 0cm -6.7° 10°C 0mm 0.2kPa 24135m 1.3m/s 1.3m/s
02:00 ☾
70% 7°C 0mm 83% 0cm -6.3° 9.7°C 0mm 0.2kPa 24134m 0.82m/s 0.75m/s
03:00 ☾
66% 6.6°C 0mm 82% 0cm -4.1° 9.5°C 0mm 0.21kPa 24134m 0.51m/s 0.52m/s
04:00
54% 6.4°C 0mm 82% 0cm 0.16° 9.4°C 0mm 0.22kPa 24134m 0.62m/s 0.61m/s
05:00
43% 6.5°C 0mm 79% 0cm 4.9° 10°C 0mm 0.26kPa 24135m 0.61m/s 0.62m/s
06:00
31% 7.2°C 0mm 72% 0cm 11° 12°C 0mm 0.39kPa 24135m 0.82m/s 0.85m/s
07:00
25% 7.3°C 0mm 64% 0cm 18° 14°C 0mm 0.58kPa 24135m 1.2m/s 0.9m/s
08:00
20% 7.1°C 0mm 54% 0cm 25° 16°C 0mm 0.84kPa 24134m 1.5m/s 1.2m/s
09:00
14% 7°C 0mm 48% 0cm 32° 18°C 0mm 1.1kPa 24134m 1.7m/s 1.3m/s
10:00
14% 7°C 0mm 43% 0cm 39° 20°C 0mm 1.3kPa 24134m 1.4m/s 1.2m/s
11:00
13% 6.9°C 0mm 40% 0cm 46° 21°C 0mm 1.5kPa 24135m 1.4m/s 1.3m/s
12:00
13% 6.8°C 0mm 37% 0cm 50° 22°C 0mm 1.7kPa 24134m 1.5m/s 1.5m/s
13:00
13% 6.7°C 0mm 37% 0cm 52° 22°C 0mm 1.7kPa 24135m 1.9m/s 2.2m/s
14:00
12% 6.9°C 0mm 38% 0cm 52° 22°C 0mm 1.7kPa 24135m 2m/s 2.3m/s
15:00
12% 7.7°C 0mm 42% 0cm 48° 21°C 0mm 1.5kPa 24135m 2.2m/s 2.5m/s
16:00
15% 7.9°C 0mm 43% 0cm 43° 21°C 0mm 1.4kPa 24134m 2.2m/s 2.2m/s
17:00
18% 8.1°C 0mm 44% 0cm 36° 21°C 0mm 1.4kPa 24135m 2.4m/s 2m/s
18:00
21% 8.5°C 0mm 46% 0cm 29° 20°C 0mm 1.3kPa 24134m 2.3m/s 1.8m/s
19:00
22% 11°C 0mm 56% 0cm 22° 19°C 0mm 0.98kPa 24135m 2.6m/s 1.4m/s
20:00
24% 11°C 0mm 64% 0cm 15° 18°C 0mm 0.74kPa 24135m 1.4m/s 1.4m/s
21:00
25% 10°C 0mm 67% 0cm 8.1° 16°C 0mm 0.61kPa 24135m 1m/s 0.98m/s
22:00
26% 10°C 0mm 71% 0cm 2.6° 15°C 0mm 0.5kPa 24135m 1.1m/s 0.96m/s
23:00 ☾
26% 9.8°C 0mm 75% 0cm -2.1° 14°C 0mm 0.4kPa 24135m 1.2m/s 0.94m/s
Tue, Jun 9 Sunrise 03:54 Sunset 22:39
24:00 ☾
27% 9.4°C 0mm 80% 0cm -5.2° 13°C 0mm 0.3kPa 24135m 1.2m/s 0.92m/s
01:00 ☾
26% 9.8°C 0mm 72% 0cm -6.6° 15°C 0mm 0.47kPa 24135m 1.5m/s 1.1m/s
02:00 ☾
25% 10°C 0mm 65% 0cm -6.2° 17°C 0mm 0.67kPa 24135m 1.7m/s 1.3m/s
03:00 ☾
24% 10°C 0mm 57% 0cm -4° 19°C 0mm 0.92kPa 24135m 2m/s 1.4m/s
04:00
24% 9.8°C 0mm 51% 0cm 0.21° 20°C 0mm 1.2kPa 24135m 1.8m/s 1.3m/s
05:00
24% 9.3°C 0mm 45% 0cm 4.9° 22°C 0mm 1.4kPa 24135m 1.6m/s 1.2m/s
06:00
24% 8.6°C 0mm 39% 0cm 11° 23°C 0mm 1.8kPa 24135m 1.4m/s 1.1m/s
07:00
23% 9°C 0mm 43% 0cm 18° 22°C 0mm 1.5kPa 24135m 2.6m/s 1.9m/s
08:00
23% 9.3°C 0mm 47% 0cm 25° 21°C 0mm 1.3kPa 24135m 3.8m/s 2.7m/s
09:00
22% 9.5°C 0mm 51% 0cm 33° 20°C 0mm 1.2kPa 24135m 5m/s 3.5m/s
10:00
24% 9.3°C 0mm 53% 0cm 40° 19°C 0mm 1kPa 24135m 5m/s 3.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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