5-day weather forecast Helsinki 25-08-2026

Weather forecast Helsinki Tuesday, August 25 25.08.2026: overcast, temperature from 10 °C to 20 °C.

Precipitation probability 31%. Wind up to 5.31 m/s (gusts 11.92 m/s). Air humidity 49–92%, atmospheric pressure 758–766 mm Hg, UV index up to 5.

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SevereAug 23, 12:00 AM — Aug 23, 09:00 AMTranslate with Google

Orange wind warning for sea area: Western Gulf of Finland, Sun 0.00 - 9.00

Wind warning for sea areas

Wind warning for sea areas: In the night between Saturday and Sunday and in Sunday morning, probability for northeast storm is 20%.

SevereAug 23, 12:00 AM — Aug 23, 06:00 AMTranslate with Google

Orange wave height warning: Western Gulf of Finland, Sun 0.00 - 6.00

Wave height warning

Wave height warning: In the night between Saturday and Sunday and in Sunday morning, probability for very rough waves is 20%. The significant wave height may exceed 4 meters.

5 days at a glance — tap a day to open it

Sunrise 05:58
Sunset 20:46

Full Moon97% illuminated
Moonrise 20:28 · Moonset 02:00

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Table

← Mon, Aug 24

Tue, Aug 25, 2026

Forecast from 10 °C to 20 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	12	12	11	11	10	10	12	11	12	13	15	16	15	17	18	17	20	20	17	18	17	15	15	15
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0.01	0	0	0.02	0	0	0.1	0	0	0.03	0	0

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	100	100	59	100	9	100	100	7	5	100	5	41	100	66	18	94	50	100	94	25	32	100	94	100
Rain chance (%)	27	28	19	28	15	31	26	12	10	25	6	8	18	10	4	15	5	12	21	4	6	22	16	16

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	4.19	4.31	4.5	4.5	4	4.19	4.69	4.31	4.19	4.69	4.69	4.69	5.31	4.61	4.39	5.31	3.19	2.81	3.81	1.39	1.19	3	1.69	2.11
Wind gust (m/s)	10.61	10.53	10.69	10.61	10.81	11.19	10.61	11.92	11.33	10.03	7.81	7.19	8.42	6.81	6.5	8.42	5.83	5.42	7.72	2.33	1.33	8.64	1.72	2.81
Wind direction (°)	NW 318°	NW 315°	NW 317°	NW 316°	NW 318°	NW 317°	NW 320°	NW 319°	NW 325°	NNW 328°	NNW 337°	NNW 341°	NNW 334°	NNW 345°	NNW 337°	NNW 342°	NNW 337°	N 352°	NNW 343°	N 353°	NNW 330°	NNW 330°	NW 314°	NW 309°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	86	87	86	86	91	92	84	86	82	82	68	65	68	61	58	60	49	51	62	57	64	73	66	65

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	758	758	758	758	761	761	759	761	762	760	762	762	761	763	764	761	764	764	762	765	765	764	766	766

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0.1	0.4	0.9	1.6	2.2	2.4	3.2	3	1.9	5	4	4	5	5	0	0	0

← Mon, Aug 24

Tue, Aug 25, 2026

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Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

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