How often do conditions match?

No opportunity windows are predicted in the next 14 days. Conditions can change quickly, so check back for updates.

More Fog Hunter in Southern Finland

Create your own alerts

Rule Fog Hunter

Porvoo - Fog Hunter - Southern Finland

Q: What conditions does Fog Hunter look for?

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

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

Get notified

Free alerts · takes 30 seconds

Rule requirements (key thresholds)

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

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

Visibility 100% failing

Wind Speed 94% failing

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

No opportunities in the next 14 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.

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

0matching hours in the next 72 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, Jan 11
14:00	0%	3.2°C	20420m	5.5m/s
15:00	0%	3°C	19040m	5.5m/s
16:00	0%	2.9°C	12020m	5.6m/s
17:00	0%	2.7°C	12100m	5.7m/s
18:00	0%	2.7°C	11580m	5.8m/s
19:00	0%	2.9°C	13260m	5.7m/s
20:00	0%	2.9°C	10980m	5.5m/s
21:00	0%	2.9°C	9980m	5.4m/s
22:00	0%	2.9°C	12900m	5.4m/s
23:00	0%	2.7°C	16600m	5.4m/s
Mon, Jan 12
24:00	0%	2.6°C	26880m	5.3m/s
01:00	0%	2.6°C	29060m	5.2m/s
02:00	0%	2.6°C	27500m	5m/s
03:00	0%	2.6°C	21560m	4.7m/s
04:00	0%	2.4°C	24340m	4.5m/s
05:00	0%	2.2°C	23400m	4.3m/s
06:00	0%	2.1°C	27520m	4.2m/s
07:00	0%	2.1°C	26600m	4.3m/s
08:00	0%	2.1°C	19240m	4.1m/s
09:00	0%	2.2°C	12060m	4.1m/s
10:00	0%	2.2°C	11560m	4m/s
11:00	0%	2.5°C	10240m	3.8m/s
12:00	0%	2.7°C	15360m	3.8m/s
13:00	0%	2.9°C	18840m	3.7m/s
14:00	0%	2.7°C	12980m	3.8m/s
15:00	0%	2.6°C	9900m	3.9m/s
16:00	0%	2.2°C	8360m	4m/s
17:00	0%	2.1°C	7640m	3.9m/s
18:00	0%	2.1°C	8060m	3.9m/s
19:00	0%	2.1°C	9760m	3.8m/s
20:00	0%	1.8°C	19040m	3.5m/s
21:00	0%	1.5°C	20320m	3.3m/s
22:00	0%	1.3°C	8720m	3.5m/s
23:00	0%	1.5°C	5220m	3.8m/s
Tue, Jan 13
24:00	0%	1.6°C	4620m	3.6m/s
01:00	0%	1.8°C	4860m	3.5m/s
02:00	0%	1.8°C	5160m	3.6m/s
03:00	0%	1.9°C	4700m	3.7m/s
04:00	0%	1.9°C	6060m	3.8m/s
05:00	0%	2.1°C	5740m	4m/s
06:00	0%	1.9°C	5100m	3.7m/s
07:00	0%	1.9°C	9000m	3.3m/s
08:00	0%	1.9°C	8960m	3.3m/s
09:00	0%	2°C	9420m	3.3m/s
10:00	0%	2.2°C	10880m	3.5m/s
11:00	0%	2.3°C	9100m	3.4m/s
12:00	0%	2.5°C	5900m	3.4m/s
13:00	0%	2.4°C	4740m	3.4m/s
14:00	0%	2.4°C	8740m	3.6m/s
15:00	0%	2.5°C	37700m	3.5m/s
16:00	0%	2.5°C	34360m	3m/s
17:00	0%	2.5°C	30520m	2.7m/s
18:00	0%	2.5°C	25200m	2.7m/s
19:00	0%	2.3°C	25300m	2.4m/s
20:00	0%	2.2°C	23980m	2.3m/s
21:00	0%	2.2°C	20720m	2.3m/s
22:00	0%	2.1°C	13840m	2.3m/s
23:00	0%	1.8°C	11800m	2.3m/s
Wed, Jan 14
24:00	0%	1.6°C	10120m	2.4m/s
01:00	0%	1.6°C	8680m	2.3m/s
02:00	0%	1.5°C	8880m	2.2m/s
03:00	0%	1.5°C	8060m	2.5m/s
04:00	0%	1.3°C	8180m	2.8m/s
05:00	0%	1.2°C	7020m	2.8m/s
06:00	0%	1.2°C	5360m	2.6m/s
07:00	76%	0.9°C	5860m	2.3m/s
08:00	76%	0.8°C	5880m	1.8m/s
09:00	76%	0.9°C	9540m	1.2m/s
10:00	0%	1.1°C	14240m	1.4m/s
11:00	0%	2°C	14200m	1.9m/s
12:00	0%	2.1°C	25340m	2.4m/s
13:00	0%	2.3°C	34320m	2.8m/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
Sun, Jan 11 Sunrise 09:14 Sunset 15:36
15:00	-9.6°C	0mm	79%	0cm	-6.6°C	0mm	0.08kPa	9.9m/s
16:00 ☾	-9.5°C	0mm	80%	0.07cm	-6.6°C	0.1mm	0.07kPa	10m/s
17:00 ☾	-9.4°C	0mm	81%	0.07cm	-6.7°C	0.1mm	0.07kPa	10m/s
18:00 ☾	-9.4°C	0mm	81%	0.07cm	-6.7°C	0.1mm	0.07kPa	10m/s
19:00 ☾	-9.6°C	0mm	80%	0.14cm	-6.7°C	0.2mm	0.07kPa	10m/s
20:00 ☾	-9.7°C	0mm	80%	0.07cm	-6.8°C	0.1mm	0.07kPa	10m/s
21:00 ☾	-9.7°C	0mm	80%	0.07cm	-6.8°C	0.1mm	0.07kPa	9.9m/s
22:00 ☾	-9.7°C	0mm	80%	0.07cm	-6.8°C	0.1mm	0.07kPa	9.7m/s
23:00 ☾	-9.4°C	0mm	81%	0.07cm	-6.7°C	0.1mm	0.07kPa	9.8m/s
Mon, Jan 12 Sunrise 09:14 Sunset 15:36
24:00 ☾	-9.2°C	0mm	82%	0.07cm	-6.6°C	0.1mm	0.07kPa	9.8m/s
01:00 ☾	-9.2°C	0mm	82%	0.07cm	-6.6°C	0.1mm	0.07kPa	9.6m/s
02:00 ☾	-9.1°C	0mm	82%	0.07cm	-6.5°C	0.1mm	0.07kPa	9.4m/s
03:00 ☾	-9.2°C	0mm	82%	0cm	-6.6°C	0mm	0.07kPa	8.9m/s
04:00 ☾	-9.1°C	0mm	83%	0cm	-6.7°C	0mm	0.06kPa	8.4m/s
05:00 ☾	-9°C	0mm	84%	0cm	-6.8°C	0mm	0.06kPa	8m/s
06:00 ☾	-9.1°C	0mm	85%	0cm	-7°C	0mm	0.05kPa	7.5m/s
07:00 ☾	-9.1°C	0mm	85%	0cm	-7°C	0mm	0.05kPa	7.6m/s
08:00 ☾	-9.2°C	0mm	85%	0cm	-7.1°C	0mm	0.05kPa	7.6m/s
09:00 ☾	-9.5°C	0mm	84%	0cm	-7.3°C	0mm	0.06kPa	7.4m/s
10:00	-9.7°C	0mm	84%	0cm	-7.5°C	0mm	0.06kPa	7.3m/s
11:00	-9.7°C	0mm	82%	0cm	-7.2°C	0mm	0.06kPa	7.2m/s
12:00	-9.4°C	0mm	81%	0cm	-6.7°C	0mm	0.07kPa	6.9m/s
13:00	-9.3°C	0mm	80%	0cm	-6.4°C	0mm	0.08kPa	6.9m/s
14:00	-9.1°C	0mm	81%	0cm	-6.4°C	0mm	0.07kPa	6.7m/s
15:00	-9.1°C	0mm	82%	0cm	-6.5°C	0mm	0.07kPa	6.9m/s
16:00 ☾	-9.1°C	0mm	84%	0cm	-6.9°C	0mm	0.06kPa	7.1m/s
17:00 ☾	-9.4°C	0mm	85%	0cm	-7.3°C	0mm	0.05kPa	7.1m/s
18:00 ☾	-9.7°C	0mm	85%	0cm	-7.6°C	0mm	0.05kPa	7m/s
19:00 ☾	-10°C	0mm	85%	0cm	-7.9°C	0mm	0.05kPa	7m/s
20:00 ☾	-10°C	0mm	87%	0cm	-8.4°C	0mm	0.04kPa	6.7m/s
21:00 ☾	-10°C	0mm	89%	0cm	-8.8°C	0mm	0.03kPa	6.1m/s
22:00 ☾	-10°C	0mm	90%	0cm	-8.9°C	0mm	0.03kPa	6.1m/s
23:00 ☾	-10°C	0mm	89%	0cm	-8.9°C	0mm	0.03kPa	6.7m/s
Tue, Jan 13 Sunrise 09:13 Sunset 15:38
24:00 ☾	-10°C	0mm	88%	0cm	-8.9°C	0mm	0.04kPa	6.6m/s
01:00 ☾	-11°C	0mm	87%	0cm	-8.9°C	0mm	0.04kPa	6.5m/s
02:00 ☾	-11°C	0mm	87%	0cm	-8.8°C	0mm	0.04kPa	6.4m/s
03:00 ☾	-11°C	0mm	86%	0cm	-9.1°C	0mm	0.04kPa	6.6m/s
04:00 ☾	-11°C	0mm	86%	0cm	-9.1°C	0mm	0.04kPa	7m/s
05:00 ☾	-11°C	0mm	85%	0cm	-9°C	0mm	0.05kPa	7.3m/s
06:00 ☾	-11°C	0mm	86%	0cm	-9.4°C	0mm	0.04kPa	7.2m/s
07:00 ☾	-11°C	0mm	86%	0cm	-9.6°C	0mm	0.04kPa	6.8m/s
08:00 ☾	-12°C	0mm	86%	0cm	-9.8°C	0mm	0.04kPa	6.1m/s
09:00 ☾	-12°C	0mm	85%	0cm	-9.8°C	0mm	0.04kPa	6.1m/s
10:00	-12°C	0mm	84%	0cm	-9.8°C	0mm	0.05kPa	6.3m/s
11:00	-12°C	0mm	83%	0cm	-9.3°C	0mm	0.05kPa	6.4m/s
12:00	-11°C	0mm	82%	0cm	-8.6°C	0mm	0.06kPa	6.3m/s
13:00	-11°C	0mm	83%	0cm	-8.2°C	0mm	0.06kPa	6.4m/s
14:00	-10°C	0mm	83%	0cm	-8°C	0mm	0.06kPa	7m/s
15:00	-11°C	0mm	82%	0cm	-8.4°C	0mm	0.06kPa	7m/s
16:00 ☾	-11°C	0mm	82%	0cm	-8.9°C	0mm	0.06kPa	6.7m/s
17:00 ☾	-12°C	0mm	82%	0cm	-9.1°C	0mm	0.06kPa	5.9m/s
18:00 ☾	-12°C	0mm	82%	0cm	-9.1°C	0mm	0.06kPa	5.2m/s
19:00 ☾	-11°C	0mm	83%	0cm	-9.1°C	0mm	0.05kPa	5.1m/s
20:00 ☾	-11°C	0mm	84%	0cm	-8.9°C	0mm	0.05kPa	4.5m/s
21:00 ☾	-11°C	0mm	84%	0cm	-8.8°C	0mm	0.05kPa	4.3m/s
22:00 ☾	-11°C	0mm	85%	0cm	-8.6°C	0mm	0.05kPa	4.4m/s
23:00 ☾	-10°C	0mm	87%	0cm	-8.4°C	0mm	0.04kPa	4.4m/s
Wed, Jan 14 Sunrise 09:11 Sunset 15:40
24:00 ☾	-10°C	0mm	88%	0cm	-8.4°C	0mm	0.04kPa	4.5m/s
01:00 ☾	-9.8°C	0mm	88%	0cm	-8.2°C	0mm	0.04kPa	4.4m/s
02:00 ☾	-9.7°C	0mm	89%	0cm	-8.2°C	0mm	0.04kPa	4.3m/s
03:00 ☾	-9.6°C	0mm	89%	0cm	-8.1°C	0mm	0.04kPa	4.7m/s
04:00 ☾	-9.3°C	0mm	90%	0cm	-8°C	0mm	0.03kPa	5.4m/s
05:00 ☾	-9.1°C	0mm	91%	0cm	-7.9°C	0mm	0.03kPa	5.7m/s
06:00 ☾	-8.9°C	0mm	91%	0cm	-7.7°C	0mm	0.03kPa	5.6m/s
07:00 ☾	-8.3°C	0mm	93%	0cm	-7.4°C	0mm	0.02kPa	5.1m/s
08:00 ☾	-7.7°C	0mm	94%	0cm	-6.9°C	0mm	0.02kPa	4.3m/s
09:00 ☾	-7.4°C	0mm	93%	0cm	-6.5°C	0mm	0.03kPa	3.2m/s
10:00	-7°C	0mm	92%	0cm	-5.9°C	0mm	0.03kPa	2.4m/s
11:00	-7.3°C	0mm	86%	0cm	-5.3°C	0mm	0.06kPa	3.7m/s
12:00	-7.3°C	0mm	85%	0cm	-5.2°C	0mm	0.06kPa	5.1m/s
13:00	-7.7°C	0mm	84%	0cm	-5.4°C	0mm	0.07kPa	5.8m/s
14:00	-8.1°C	0mm	83%	0cm	-5.7°C	0mm	0.07kPa	6.3m/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