What conditions does Fog Hunter look for?

Fog Probability: ≥ 85.0%. Dewpoint Spread: ≤ 2.0°C. Visibility: ≤ 3000.0m. Wind Speed: ≤ 2.0m/s

How often do conditions match?

There are 1 upcoming opportunity windows in the next 10 days.

More Fog Hunter in Southern Finland

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Rule Fog Hunter

Helsinki - Fog Hunter - Southern Finland

Helsingfors, Uusimaa, Finland

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions

Fog Probability

83%

Dewpoint Spread0.4°C

Visibility7714 (Moderate)

Relative Humidity97%

Wind Speed1.5m/s (calm conditions)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

Next opportunity

Dense Fog (lingering) at Sunset

Helsinki

Sun, Mar 1 · 16:00–17:00 · 1h window

Medium confidence

44%

🌫️Fog Probability97.2%

Dewpoint Spread: 0.2°C

Visibility: 2778 (Mist/Haze)

Relative Humidity: 99%

Wind Speed: 1.9m/s (calm conditions)

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 ≥ 85.0%	Dewpoint Spread ≤ 2.0°C	Visibility ≤ 3000.0m	Wind Speed ≤ 2.0m/s
Sun, Feb 22
03:00	34%	0.5°C	119m	4.2m/s
04:00	0%	0.5°C	116m	3.5m/s
05:00	0%	0.5°C	125m	2.8m/s
06:00	0%	0.4°C	141m	2.4m/s
07:00	0%	0.5°C	303m	2.7m/s
08:00	0%	1.4°C	4072m	5.5m/s
09:00	0%	1.8°C	24134m	6.1m/s
10:00	0%	1.8°C	24134m	6.3m/s
11:00	0%	2°C	24135m	6.3m/s
12:00	0%	2.1°C	24135m	6m/s
13:00	0%	2.5°C	24135m	5.9m/s
14:00	0%	3.1°C	24134m	5.7m/s
15:00	0%	3.6°C	24135m	5.7m/s
16:00	0%	3.5°C	24135m	5.2m/s
17:00	0%	3°C	24135m	4.5m/s
18:00	0%	2.4°C	24135m	4.2m/s
19:00	0%	1.8°C	24135m	3.8m/s
20:00	0%	1.6°C	24135m	3.7m/s
21:00	0%	1.6°C	24135m	3.5m/s
22:00	0%	1.4°C	24135m	2.9m/s
23:00	60%	0.9°C	24134m	2.2m/s
Mon, Feb 23
24:00	64%	0.5°C	21344m	1.8m/s
01:00	83%	0.3°C	7374m	2m/s
02:00	86%	0.2°C	7043m	1.8m/s
03:00	86%	0.3°C	7045m	1.6m/s
04:00	83%	0.4°C	7714m	1.5m/s
05:00	75%	0.3°C	10371m	1.2m/s
06:00	75%	0.4°C	10368m	1m/s
07:00	83%	0.4°C	9907m	0.8m/s
08:00	83%	0.4°C	9877m	0.51m/s
09:00	60%	0.9°C	24134m	0.36m/s
10:00	0%	1.5°C	24135m	0.26m/s
11:00	0%	2.1°C	24135m	0.57m/s
12:00	0%	2.3°C	24135m	1.1m/s
13:00	0%	2.3°C	24135m	1.5m/s
14:00	0%	2.2°C	24135m	1.5m/s
15:00	0%	2°C	24134m	1.5m/s
16:00	0%	1.3°C	24135m	1.4m/s
17:00	67%	0.4°C	22314m	1.5m/s
18:00	78%	0.1°C	10807m	1.6m/s
19:00	86%	0.1°C	6547m	1.6m/s
20:00	86%	0.1°C	6658m	1.5m/s
21:00	86%	0.1°C	6657m	1.7m/s
22:00	86%	0.1°C	9039m	1.9m/s
23:00	86%	0.2°C	9479m	1.9m/s
Tue, Feb 24
24:00	75%	0.2°C	10146m	2m/s
01:00	67%	0.3°C	16424m	1.9m/s
02:00	78%	0.3°C	10677m	1.8m/s
03:00	86%	0.2°C	7575m	1.9m/s
04:00	86%	0.2°C	8060m	1.9m/s
05:00	67%	0.5°C	16754m	1.9m/s
06:00	64%	0.5°C	16815m	2.2m/s
07:00	64%	0.6°C	24135m	2m/s
08:00	60%	0.6°C	24135m	1.9m/s
09:00	0%	1.2°C	24135m	2.1m/s
10:00	0%	1.5°C	24135m	2.3m/s
11:00	0%	1.7°C	24135m	2.5m/s
12:00	0%	1.9°C	24134m	2.5m/s
13:00	0%	2.1°C	24135m	2.6m/s
14:00	0%	2°C	24135m	2.5m/s
15:00	0%	1.9°C	22404m	2.5m/s
16:00	0%	1.4°C	24135m	2.1m/s
17:00	60%	1°C	24134m	2.2m/s
18:00	60%	0.8°C	24134m	1.8m/s
19:00	60%	0.8°C	18739m	1.8m/s
20:00	64%	0.7°C	18590m	1.6m/s
21:00	60%	0.7°C	23840m	1.9m/s
22:00	64%	0.6°C	15609m	1.5m/s
23:00	64%	0.6°C	18039m	1.6m/s
Wed, Feb 25
24:00	64%	0.7°C	22833m	1.9m/s
01:00	64%	0.5°C	17286m	1.6m/s
02:00	64%	0.5°C	17355m	1.8m/s
03:00	75%	0.4°C	10062m	1.7m/s
04:00	75%	0.4°C	12982m	1.6m/s
05:00	83%	0.3°C	9302m	1.8m/s
06:00	83%	0.2°C	9307m	1.8m/s
07:00	86%	0.2°C	9301m	1.6m/s
08:00	86%	0.1°C	8352m	1.7m/s
09:00	68%	0.8°C	13613m	1.5m/s
10:00	0%	1.5°C	18874m	1.3m/s
11:00	0%	2.3°C	24135m	1.1m/s
12:00	0%	2.1°C	24135m	1.4m/s
13:00	0%	1.8°C	24135m	1.7m/s
14:00	0%	1.6°C	24135m	2.1m/s
15:00	0%	1.5°C	24135m	2.4m/s
16:00	0%	1.3°C	24135m	2.7m/s
17:00	0%	1.1°C	24135m	3.1m/s
18:00	0%	1.4°C	24135m	3.8m/s
19:00	0%	1.7°C	24135m	4.5m/s
20:00	0%	2.1°C	24135m	5.2m/s
21:00	0%	2.2°C	24135m	5.8m/s
22:00	0%	2.3°C	24135m	6.4m/s
23:00	0%	2.5°C	24135m	6.9m/s
Thu, Feb 26
24:00	0%	2.3°C	17882m	7.2m/s
01:00	0%	2.1°C	11628m	7.4m/s

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	Dew Point °C	Rainfall mm	Relative Humidity %	Snowfall cm	Temperature °C	Total Precipitation mm	Vapor Pressure Deficit kPa	Wind Gusts m/s
Mon, Feb 23 Sunrise 07:37 Sunset 17:31
04:00 ☾	-12°C	0mm	97%	0cm	-12°C	0mm	0.01kPa	2.8m/s
05:00 ☾	-12°C	0mm	97%	0cm	-12°C	0mm	0.01kPa	1.2m/s
06:00 ☾	-12°C	0mm	97%	0cm	-12°C	0mm	0.01kPa	1m/s
07:00 ☾	-12°C	0mm	97%	0cm	-12°C	0mm	0.01kPa	0.72m/s
08:00	-12°C	0mm	97%	0cm	-12°C	0mm	0.01kPa	0.51m/s
09:00	-10°C	0mm	93%	0cm	-9.1°C	0mm	0.02kPa	0.4m/s
10:00	-8.3°C	0mm	89%	0cm	-6.8°C	0mm	0.04kPa	0.31m/s
11:00	-7.3°C	0mm	86%	0cm	-5.2°C	0mm	0.06kPa	0.51m/s
12:00	-6.7°C	0mm	84%	0cm	-4.4°C	0mm	0.07kPa	1m/s
13:00	-6.5°C	0mm	84%	0cm	-4.2°C	0mm	0.07kPa	1.7m/s
14:00	-6.4°C	0mm	84%	0cm	-4.2°C	0mm	0.07kPa	1.7m/s
15:00	-6.5°C	0mm	85%	0cm	-4.5°C	0mm	0.06kPa	1.7m/s
16:00	-6.8°C	0mm	91%	0cm	-5.5°C	0mm	0.04kPa	1.9m/s
17:00	-9.6°C	0mm	97%	0cm	-9.2°C	0mm	0.01kPa	1.4m/s
18:00 ☾	-13°C	0mm	99%	0cm	-13°C	0mm	0kPa	1.6m/s
19:00 ☾	-14°C	0mm	99%	0cm	-14°C	0mm	0kPa	1.5m/s
20:00 ☾	-14°C	0mm	99%	0cm	-14°C	0mm	0kPa	1.4m/s
21:00 ☾	-15°C	0mm	99%	0cm	-15°C	0mm	0kPa	1.5m/s
22:00 ☾	-15°C	0mm	99%	0cm	-15°C	0mm	0kPa	1.8m/s
23:00 ☾	-15°C	0mm	98%	0cm	-15°C	0mm	0kPa	2.3m/s
Tue, Feb 24 Sunrise 07:37 Sunset 17:31
24:00 ☾	-14°C	0mm	98%	0cm	-14°C	0mm	0kPa	2.4m/s
01:00 ☾	-14°C	0mm	98%	0cm	-14°C	0mm	0kPa	2.6m/s
02:00 ☾	-15°C	0mm	98%	0cm	-15°C	0mm	0kPa	2.3m/s
03:00 ☾	-15°C	0mm	99%	0cm	-15°C	0mm	0kPa	2.4m/s
04:00 ☾	-15°C	0mm	98%	0cm	-15°C	0mm	0kPa	2.6m/s
05:00 ☾	-13°C	0mm	96%	0cm	-13°C	0mm	0.01kPa	4.3m/s
06:00 ☾	-14°C	0mm	96%	0cm	-13°C	0mm	0.01kPa	5.1m/s
07:00 ☾	-13°C	0mm	95%	0cm	-12°C	0mm	0.01kPa	5.3m/s
08:00	-12°C	0mm	95%	0cm	-11°C	0mm	0.01kPa	5.1m/s
09:00	-11°C	0mm	92%	0cm	-9.6°C	0mm	0.03kPa	4.8m/s
10:00	-9.9°C	0mm	89%	0cm	-8.4°C	0mm	0.03kPa	4.4m/s
11:00	-9.1°C	0mm	88%	0cm	-7.4°C	0mm	0.04kPa	4.2m/s
12:00	-8.7°C	0mm	86%	0cm	-6.8°C	0mm	0.05kPa	4.1m/s
13:00	-8.2°C	0mm	85%	0cm	-6.1°C	0mm	0.06kPa	4.3m/s
14:00	-7.9°C	0mm	86%	0cm	-5.9°C	0mm	0.06kPa	4.1m/s
15:00	-7.7°C	0.01mm	87%	0cm	-5.8°C	0mm	0.05kPa	4.4m/s
16:00	-7.4°C	0mm	90%	0cm	-6°C	0mm	0.04kPa	4.3m/s
17:00	-8°C	0mm	93%	0cm	-7°C	0mm	0.03kPa	5m/s
18:00 ☾	-8.4°C	0mm	94%	0cm	-7.6°C	0mm	0.02kPa	4.2m/s
19:00 ☾	-8.7°C	0mm	94%	0cm	-7.9°C	0mm	0.02kPa	5.1m/s
20:00 ☾	-8.8°C	0mm	95%	0cm	-8.1°C	0mm	0.02kPa	4.1m/s
21:00 ☾	-9°C	0mm	95%	0cm	-8.3°C	0mm	0.02kPa	4.6m/s
22:00 ☾	-9.1°C	0mm	96%	0cm	-8.5°C	0mm	0.01kPa	2.7m/s
23:00 ☾	-9.2°C	0mm	95%	0cm	-8.6°C	0mm	0.02kPa	3.1m/s
Wed, Feb 25 Sunrise 07:34 Sunset 17:33
24:00 ☾	-9.3°C	0mm	95%	0cm	-8.6°C	0mm	0.02kPa	3.6m/s
01:00 ☾	-9.9°C	0mm	96%	0cm	-9.4°C	0mm	0.01kPa	2m/s
02:00 ☾	-9.9°C	0mm	96%	0cm	-9.4°C	0mm	0.01kPa	3.2m/s
03:00 ☾	-11°C	0mm	96%	0cm	-10°C	0mm	0.01kPa	3m/s
04:00 ☾	-11°C	0mm	97%	0cm	-11°C	0mm	0.01kPa	2m/s
05:00 ☾	-13°C	0mm	98%	0cm	-13°C	0mm	0kPa	1.6m/s
06:00 ☾	-13°C	0mm	98%	0cm	-13°C	0mm	0.01kPa	1.7m/s
07:00 ☾	-14°C	0mm	98%	0cm	-14°C	0mm	0kPa	1.5m/s
08:00	-15°C	0mm	99%	0cm	-15°C	0mm	0kPa	1.5m/s
09:00	-14°C	0mm	94%	0cm	-13°C	0mm	0.01kPa	1.4m/s
10:00	-13°C	0mm	89%	0cm	-11°C	0mm	0.03kPa	1.3m/s
11:00	-12°C	0mm	84%	0cm	-9.7°C	0mm	0.05kPa	1.1m/s
12:00	-12°C	0mm	85%	0cm	-9.6°C	0mm	0.04kPa	1.5m/s
13:00	-11°C	0mm	86%	0cm	-9.6°C	0mm	0.04kPa	1.9m/s
14:00	-11°C	0mm	88%	0cm	-9.5°C	0mm	0.04kPa	2.2m/s
15:00	-10°C	0mm	89%	0cm	-8.8°C	0mm	0.03kPa	2.8m/s
16:00	-9.4°C	0mm	90%	0cm	-8.1°C	0mm	0.03kPa	3.3m/s
17:00	-8.5°C	0mm	92%	0cm	-7.4°C	0mm	0.03kPa	3.8m/s
18:00 ☾	-7.9°C	0mm	90%	0cm	-6.5°C	0mm	0.04kPa	5.7m/s
19:00 ☾	-7.3°C	0mm	88%	0cm	-5.6°C	0mm	0.05kPa	7.6m/s
20:00 ☾	-6.8°C	0mm	85%	0cm	-4.7°C	0mm	0.06kPa	9.4m/s
21:00 ☾	-6.7°C	0mm	85%	0cm	-4.5°C	0mm	0.07kPa	10m/s
22:00 ☾	-6.6°C	0mm	84%	0cm	-4.3°C	0mm	0.07kPa	11m/s
23:00 ☾	-6.6°C	0mm	83%	0cm	-4.1°C	0mm	0.08kPa	13m/s
Thu, Feb 26 Sunrise 07:31 Sunset 17:36
24:00 ☾	-6.3°C	0.05mm	84%	0.05cm	-4°C	0.08mm	0.07kPa	13m/s
01:00 ☾	-6.1°C	0.1mm	85%	0.1cm	-4°C	0.17mm	0.07kPa	13m/s
02:00 ☾	-5.8°C	0.15mm	87%	0.15cm	-3.9°C	0.25mm	0.06kPa	14m/s
03:00 ☾	-6°C	0.1mm	84%	0.1cm	-3.7°C	0.19mm	0.07kPa	14m/s

How to read: these inputs help produce the derived score; they are not requirements by themselves.

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