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The weather in
Helsinki
See today's weather and the 14-day forecast for Helsinki. Search another place to look ahead instantly.
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Helsinki, Finland
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next 24 hours
Rain forecast for Helsinki
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looking ahead in Helsinki
The next 14 days
Helsinki weather
Weather in Helsinki
See the forecast for Helsinki in one clear overview. From temperature and wind to the chance of rain: plan a walk along the waterfront or a day exploring the Design District with up-to-date information.
Today and the next 14 days
The forecast for Helsinki is updated daily. Check the temperature, wind and chance of rain hour by hour, and use the 14-day outlook to plan ahead and spot which days look best for being outside.
Practical weather notes for Helsinki
Helsinki's northern position means daylight swings dramatically between seasons, shaping the weather as much as temperature does. The nearby Baltic Sea moderates temperatures somewhat compared with inland Finland, but wind off the water is a near-constant factor.
Seasons in Helsinki
Winters are cold with reliable snow and long dark stretches, while summers are mild rather than hot, with very long daylight hours that make even average temperatures feel pleasant outdoors.
Frequently asked questions
How often is the forecast updated?
The live weather data refreshes several times a day, so you're always seeing the latest forecast for Helsinki.
Is the 14-day forecast reliable?
The first few days are usually the most accurate. Further ahead, the forecast mainly shows a trend rather than the exact weather at a specific hour.
What should I check before heading outside?
Look at the combination of rain, wind and feels-like temperature. A short trip can handle a passing shower, but a longer walk or bike ride benefits from a more stable stretch of weather.
climate
Climate in Helsinki by month
Planning a trip to Helsinki? Below are the average daily high and low temperatures and the rainfall for each month, plus the sea temperature. For the coming days, see the forecast above.
| Month | Avg high | Avg low | Rain | Sea |
|---|---|---|---|---|
| January | -1.1°C (30°F) | -5.8°C (22°F) | 68 mm (2.7 in) | 0.1°C (32°F) |
| February | -0.4°C (31°F) | -5.2°C (23°F) | 63 mm (2.5 in) | -0.2°C (32°F) |
| March | 2.0°C (36°F) | -3.6°C (26°F) | 45 mm (1.8 in) | 0.8°C (33°F) |
| April | 7.2°C (45°F) | 0.3°C (33°F) | 45 mm (1.8 in) | 3.9°C (39°F) |
| May | 13.7°C (57°F) | 5.9°C (43°F) | 48 mm (1.9 in) | 9.8°C (50°F) |
| June | 18.8°C (66°F) | 11.6°C (53°F) | 56 mm (2.2 in) | 16.0°C (61°F) |
| July | 20.5°C (69°F) | 14.0°C (57°F) | 79 mm (3.1 in) | 18.6°C (65°F) |
| August | 19.9°C (68°F) | 13.8°C (57°F) | 83 mm (3.3 in) | 19.6°C (67°F) |
| September | 15.4°C (60°F) | 10.2°C (50°F) | 70 mm (2.8 in) | 17.1°C (63°F) |
| October | 9.1°C (48°F) | 4.7°C (40°F) | 80 mm (3.1 in) | 10.6°C (51°F) |
| November | 4.5°C (40°F) | 1.1°C (34°F) | 78 mm (3.1 in) | 6.1°C (43°F) |
| December | 1.3°C (34°F) | -2.5°C (28°F) | 66 mm (2.6 in) | 2.4°C (36°F) |
Source: ERA5 reanalysis via Open-Meteo, 2015-2024; sea temperature: Open-Meteo Marine, 2023-2025. Model averages for a grid cell, not official station records.
Best time to visit Helsinki
The warmest month in Helsinki is July, with an average high of 20.5°C (69°F). The coolest is January, at -1.1°C (30°F). The wettest month is August, with about 83 mm (3.3 in) of rain. Average highs stay below 25°C (77°F) all year. For sightseeing and walking, with highs between 18 and 27°C (64 to 81°F), June to August are the most comfortable. The sea is warmest in August, at 19.6°C (67°F), and coolest in February, at -0.2°C (32°F). It doesn't reach 21°C (70°F) in any month.
Climate FAQ
What is the warmest month in Helsinki?
July, with an average high of 20.5°C (69°F) and an average low of 14.0°C (57°F) (averages for 2015-2024).
What is the wettest month in Helsinki?
August, with about 83 mm (3.3 in) of rain. The driest month is March.
When can you swim in the sea in Helsinki?
The sea stays below 21°C (70°F) on average; it is warmest in August, at 19.6°C (67°F).
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