Skip to content
PhotoWeather
Get started
More Fog Hunter in Southern Finland
Create your own alerts
Rule Fog Hunter

Porvoo - Fog Hunter - Southern Finland

Porvoo, Uusimaa, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Fog Probability
55%
Dewpoint Spread0.6°C
Visibility24135 (Clear)
Relative Humidity96%
Wind Speed2.1m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki
fog weather icon
Next opportunity
Dense Fog
Porvoo
Sun, Jun 14 · 17:00–20:00 · 3h window
Medium confidence
55%
🌫️Fog Probability80.1-98.1%
Dewpoint Spread: 0.1°C
Visibility: 141 (Dense fog)
Relative Humidity: 99%
Wind Speed: 2.0m/s (calm conditions)
fog weather icon
Moderate Fog at Sunset
Porvoo
Sun, Jun 14 · 21:00–23:00
🌫️Fog Probability:75.8%
Low

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.

Create your own Fog Hunter alerts

Get notified when these conditions match at your own locations.

Get this template

72-hour requirements breakdown

What passed or failed, hour by hour
2matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Fog Probability
≥ 75.0%
Tue, Jun 9
05:000%
06:000%
07:000%
08:000%
09:000%
10:0024%
11:000%
12:0021%
13:000%
14:000%
15:000%
16:0021%
17:0021%
18:0021%
19:0027%
20:0030%
21:0039%
22:0073%
23:0076%
Wed, Jun 10
24:0069%
01:0073%
02:0073%
03:0091%
04:0062%
05:0055%
06:0048%
07:000%
08:000%
09:0038%
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, Jun 11
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%
Fri, Jun 12
24:000%
01:000%
02:000%
03:000%
04:0059%
05:0070%
06:0069%
07:0041%
08:0026%
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%
Sat, Jun 13
24:000%
01:000%
02:000%
03:000%
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
Wed, Jun 10 Sunrise 03:52 Sunset 22:41
05:00
3% 12°C 0mm 96% 0cm 5° 13°C 0mm 0.05kPa 24135m 6.7m/s 2.1m/s
06:00
0% 12°C 0mm 96% 0cm 11° 12°C 0mm 0.06kPa 24135m 7.8m/s 2.3m/s
07:00
0% 12°C 0mm 94% 0cm 18° 13°C 0mm 0.09kPa 24134m 7.4m/s 2.2m/s
08:00
0% 12°C 0.09mm 93% 0cm 25° 13°C 0.06mm 0.11kPa 24135m 6.7m/s 2.7m/s
09:00
0% 11°C 0mm 96% 0cm 33° 12°C 0.06mm 0.05kPa 24134m 8.7m/s 3.3m/s
10:00
1% 12°C 0mm 95% 0cm 40° 13°C 0mm 0.08kPa 24135m 8.4m/s 3.1m/s
11:00
1% 13°C 0mm 80% 0cm 46° 16°C 0mm 0.36kPa 24135m 7.6m/s 4.5m/s
12:00
2% 10°C 0mm 59% 0cm 50° 18°C 0.06mm 0.85kPa 24135m 8m/s 4.8m/s
13:00
2% 9.4°C 0mm 53% 0cm 53° 19°C 0.06mm 1kPa 24135m 8.2m/s 5.6m/s
14:00
3% 8.8°C 0mm 52% 0cm 52° 19°C 0.06mm 1kPa 24135m 8m/s 6.3m/s
15:00
3% 5.9°C 0mm 43% 0cm 49° 19°C 0.06mm 1.2kPa 24135m 8.1m/s 5.9m/s
16:00
21% 4.2°C 0mm 38% 0cm 43° 19°C 0mm 1.4kPa 24135m 7.8m/s 5.1m/s
17:00
38% 3.1°C 0mm 34% 0cm 37° 19°C 0mm 1.5kPa 24134m 7.4m/s 5.1m/s
18:00
56% 4.1°C 0mm 38% 0cm 29° 19°C 0mm 1.4kPa 24135m 7.2m/s 4.6m/s
19:00
53% 5°C 0mm 43% 0cm 22° 18°C 0mm 1.1kPa 24134m 7.4m/s 4.5m/s
20:00
49% 4.9°C 0mm 50% 0cm 15° 15°C 0mm 0.88kPa 24135m 8.2m/s 4.1m/s
21:00
46% 5.7°C 0mm 58% 0cm 8.3° 14°C 0mm 0.66kPa 24135m 8m/s 3.1m/s
22:00
36% 6.4°C 0mm 69% 0cm 2.8° 12°C 0mm 0.44kPa 24134m 7.6m/s 2.5m/s
23:00 ☾
25% 6.6°C 0mm 77% 0cm -1.9° 10°C 0mm 0.29kPa 24134m 6m/s 2.2m/s
Thu, Jun 11 Sunrise 03:52 Sunset 22:41
24:00 ☾
15% 7°C 0mm 82% 0cm -5° 9.9°C 0mm 0.22kPa 24134m 5.9m/s 2.1m/s
01:00 ☾
11% 7.6°C 0mm 84% 0cm -6.4° 10°C 0mm 0.2kPa 24134m 7.8m/s 2.2m/s
02:00 ☾
7% 8.2°C 0mm 86% 0cm -6° 10°C 0mm 0.17kPa 24135m 8.4m/s 2.2m/s
03:00 ☾
3% 8.4°C 0mm 91% 0cm -3.9° 9.8°C 0mm 0.11kPa 24135m 7.5m/s 2m/s
04:00
2% 8.5°C 0mm 90% 0cm 0.31° 10°C 0mm 0.12kPa 24135m 7.2m/s 1.8m/s
05:00
2% 8.4°C 0mm 90% 0cm 5° 10°C 0mm 0.12kPa 24134m 5.3m/s 1.8m/s
06:00
1% 8.8°C 0mm 84% 0cm 11° 11°C 0mm 0.21kPa 24134m 5.1m/s 1.5m/s
07:00
1% 8.7°C 0mm 74% 0cm 18° 13°C 0mm 0.38kPa 24134m 3.9m/s 1.8m/s
08:00
1% 8.3°C 0mm 65% 0cm 25° 15°C 0mm 0.58kPa 24134m 3.1m/s 1.8m/s
09:00
1% 7.8°C 0mm 58% 0cm 33° 16°C 0mm 0.76kPa 24134m 3m/s 2.1m/s
10:00
5% 7.3°C 0mm 52% 0cm 40° 17°C 0mm 0.92kPa 24134m 3.2m/s 2.6m/s
11:00
10% 6.7°C 0mm 49% 0cm 46° 18°C 0mm 1kPa 24134m 3.1m/s 2.7m/s
12:00
14% 6.4°C 0mm 48% 0cm 50° 18°C 0mm 1.1kPa 24134m 3m/s 2.5m/s
13:00
10% 6.4°C 0mm 50% 0cm 53° 17°C 0mm 0.95kPa 24134m 2.3m/s 2.3m/s
14:00
6% 6.3°C 0mm 48% 0cm 52° 18°C 0mm 1.1kPa 24134m 2.4m/s 2.3m/s
15:00
2% 6.6°C 0mm 52% 0cm 49° 16°C 0mm 0.88kPa 24134m 3m/s 2.7m/s
16:00
1% 7.7°C 0mm 64% 0cm 43° 14°C 0mm 0.58kPa 24134m 4.3m/s 2.2m/s
17:00
1% 7.8°C 0mm 68% 0cm 37° 14°C 0mm 0.51kPa 24135m 3.1m/s 1m/s
18:00
0% 7.5°C 0mm 70% 0cm 29° 13°C 0mm 0.44kPa 24134m 0.53m/s 0.46m/s
19:00
0% 8.1°C 0.49mm 79% 0cm 22° 12°C 0.25mm 0.29kPa 21753m 5.1m/s 2.6m/s
20:00
0% 8.9°C 0.4mm 87% 0cm 15° 11°C 0.69mm 0.18kPa 21211m 9m/s 4m/s
21:00
0% 9.4°C 4mm 91% 0cm 8.4° 11°C 2.3mm 0.12kPa 4324m 12m/s 3.9m/s
22:00
0% 10°C 6.3mm 97% 0cm 2.8° 10°C 7.1mm 0.04kPa 3798m 11m/s 3.9m/s
23:00 ☾
0% 10°C 0.65mm 97% 0cm -1.8° 11°C 9.1mm 0.04kPa 15288m 11m/s 3.7m/s
Fri, Jun 12 Sunrise 03:51 Sunset 22:42
24:00 ☾
0% 10°C 0.23mm 94% 0cm -4.9° 11°C 9.5mm 0.07kPa 22624m 12m/s 3.5m/s
01:00 ☾
0% 11°C 0.23mm 96% 0cm -6.4° 11°C 10mm 0.06kPa 12248m 11m/s 3.4m/s
02:00 ☾
0% 12°C 0.14mm 98% 0cm -6° 12°C 10mm 0.02kPa 22788m 9.5m/s 3.1m/s
03:00 ☾
0% 13°C 0mm 99% 0cm -3.8° 13°C 10mm 0.01kPa 446m 9.1m/s 2.6m/s
04:00
0% 13°C 0mm 98% 0cm 0.35° 13°C 0mm 0.04kPa 2480m 9.9m/s 4.4m/s
05:00
0% 12°C 0.01mm 98% 0cm 5.1° 12°C 0mm 0.02kPa 508m 9.2m/s 3.9m/s
06:00
0% 11°C 0mm 98% 0cm 11° 11°C 0mm 0.03kPa 756m 10m/s 5.1m/s
07:00
2% 11°C 0mm 98% 0cm 18° 11°C 0mm 0.03kPa 8755m 10m/s 4.3m/s
08:00
3% 10°C 0mm 96% 0cm 25° 11°C 0mm 0.05kPa 24135m 10m/s 4.7m/s
09:00
5% 9.9°C 0mm 94% 0cm 33° 11°C 0.06mm 0.07kPa 24134m 10m/s 4.2m/s
10:00
8% 10°C 0mm 86% 0cm 40° 13°C 0.06mm 0.2kPa 24135m 9m/s 4.6m/s
11:00
10% 9.3°C 0mm 74% 0cm 46° 14°C 0.19mm 0.42kPa 24135m 7.6m/s 4.9m/s
12:00
13% 8.7°C 0mm 74% 0cm 50° 13°C 0.25mm 0.39kPa 24134m 7.3m/s 4m/s
13:00
12% 8.5°C 0mm 62% 0cm 53° 16°C 0.31mm 0.68kPa 24135m 7.4m/s 5.1m/s
14:00
11% 9°C 0mm 70% 0cm 52° 14°C 0.44mm 0.48kPa 24135m 7.5m/s 5.2m/s
15:00
10% 8.2°C 0mm 59% 0cm 49° 16°C 0.5mm 0.76kPa 24134m 7.2m/s 4.6m/s
16:00
14% 8.1°C 0mm 66% 0cm 43° 14°C 0.33mm 0.56kPa 24134m 5.7m/s 3.6m/s
17:00
18% 7.8°C 0mm 73% 0cm 37° 12°C 0.17mm 0.39kPa 24135m 4.2m/s 2.7m/s
18:00
22% 7.3°C 0mm 80% 0cm 30° 11°C 0mm 0.25kPa 24135m 2.6m/s 1.7m/s
19:00
22% 7.1°C 0mm 82% 0cm 22° 10°C 0mm 0.23kPa 24135m 2.2m/s 1.6m/s
20:00
22% 6.8°C 0mm 83% 0cm 15° 9.5°C 0mm 0.2kPa 24135m 1.8m/s 1.5m/s
21:00
22% 6.5°C 0mm 85% 0cm 8.5° 9°C 0mm 0.18kPa 24135m 1.3m/s 1.3m/s
22:00
29% 6.7°C 0mm 83% 0cm 2.9° 9.5°C 0mm 0.21kPa 24135m 1.2m/s 1.1m/s
23:00 ☾
35% 6.9°C 0mm 81% 0cm -1.7° 10°C 0mm 0.24kPa 24135m 1.1m/s 0.86m/s
Sat, Jun 13 Sunrise 03:51 Sunset 22:43
24:00 ☾
42% 7°C 0mm 79% 0cm -4.9° 11°C 0mm 0.27kPa 24135m 0.93m/s 0.62m/s
01:00 ☾
41% 6.7°C 0mm 71% 0cm -6.3° 12°C 0mm 0.41kPa 24135m 0.83m/s 0.6m/s
02:00 ☾
41% 6.3°C 0mm 63% 0cm -5.9° 13°C 0mm 0.57kPa 24135m 0.73m/s 0.58m/s
03:00 ☾
40% 5.6°C 0mm 55% 0cm -3.7° 15°C 0mm 0.75kPa 24135m 0.62m/s 0.56m/s
04:00
38% 5.4°C 0mm 50% 0cm 0.39° 16°C 0mm 0.91kPa 24135m 1m/s 0.97m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

Get Notified of Opportunities

Create your own custom alerts for this location and more.

Create Free Account