14 day weather forecast

Helsinki weather August 2026 — 14 day forecast · Finland

20°

cloudy · feels like 17°

Updated at
  • Live from Open-Meteo
  • Refreshed several times a day
  • 14 days ahead
  • No tracking · free
Warmest day
Saturday 29 Aug
20°C
highest maximum
Wettest day
Thursday 3 Sept
26.5 mm
59% chance
Most sunshine
Thursday 3 Sept
13.4 hours
of sunshine
Trend
14 days
Cooler
From ~18° to ~15°

The next 14 days

swipe →
Avg max, 3 days
19.0°C
Coldest night
7°C
Most sunshine
13.4 h
Wind from
the south

Overview table · August 2026

Helsinki 14 day forecast, day by day

The table below shows the full 14 day weather forecast for Helsinki (Finland): the maximum and minimum temperature, rainfall in millimetres, the chance of rain, humidity, hours of sunshine and the UV index per day. Across the next two weeks the maximum temperature in Helsinki averages around 17°C and the minimum around 12°C, with roughly 88 mm of rain in total, 2 dry days and about 123 hours of sunshine.

Last updated:

14 day weather forecast for Helsinki (Finland) per day: temperature, rainfall, chance of rain, humidity, sunshine hours and UV index. Updated in August 2026.
DayWeatherMaxMinRainChanceHumiditySunUV
Saturday29 AugCloudy20°C17°C0 mm2%76%7.1 h4moderate
Sunday30 AugShowers19°C16°C4.2 mm98%88%4.9 h3moderate
Monday31 AugShowers18°C16°C10 mm100%93%0.3 h1low
Tuesday1 SeptLight rain18°C16°C5.6 mm82%89%11.7 h4moderate
Wednesday2 SeptLight rain19°C13°C2.7 mm69%89%10.2 h4moderate
Thursday3 SeptThunder17°C13°C26.5 mm59%79%13.4 h4moderate
Friday4 SeptThunder16°C10°C9.5 mm61%84%13.3 h4moderate
Saturday5 SeptLight rain17°C10°C5.4 mm53%80%9.6 h4moderate
Sunday6 SeptLight rain17°C11°C1.2 mm37%81%12.9 h3moderate
Monday7 SeptLight rain16°C11°C3.6 mm38%78%13 h3moderate
Tuesday8 SeptShowers14°C10°C6 mm31%78%9.3 h2low
Wednesday9 SeptShowers15°C10°C7.2 mm37%72%4.9 h0low
Thursday10 SeptCloudy14°C8°C0 mm37%73%12.2 h2low
Friday11 SeptLight rain13°C7°C6.6 mm29%83%0 h3moderate

The first three to five days of the forecast for Helsinki are the most reliable; from day seven onwards it is an indicative trend. Click a day in the overview above for hourly detail. Source: Open-Meteo (Met Office, DWD, ECMWF).

Background & outlook

The weather in Helsinki

Current conditions and the 14 day forecast

Helsinki lies in Finland, an area with a cool maritime climate: mild for the latitude but wet and windy, with long summer days and short, dark winter ones. That is exactly why a two-week outlook is useful here — it shows the pattern rather than one snapshot.

What is the weather like in Helsinki right now?

It is currently 20°C in Helsinki with cloudy. It feels like 17°C, humidity is 64% and the wind is SE 25 km/h.

Today (Saturday) reaches a maximum of 20°C and a minimum of 17°C, with 0 mm of rain and 7.1 hours of sunshine. Sunrise is at 06:07 and sunset at 20:34.

Helsinki weather tomorrow

Tomorrow (Sunday) the maximum temperature in Helsinki is 19°C and the minimum 16°C. Around 4.2 mm of rain is expected with 4.9 hours of sunshine, and the chance of rain is 98%. The data is refreshed several times a day through Open-Meteo.

Helsinki weather this week and next week

Over the coming week the average maximum temperature in Helsinki sits around 18°C and the average minimum around 14°C. Roughly 58.5 mm of rain is expected, spread across 6 days, with 0 largely sunny days.

The warmest day in the 14 day forecast for Helsinki is Saturday 29 Aug at 20°C. The coldest night falls on Friday 11 Sept at 7°C. Click any day for hourly detail.

Rain, sunshine and UV in Helsinki

A daily rainfall total says little on its own: the same 5 mm can be one short downpour or a grey day of drizzle, which is why the hourly chart above is often the more useful of the two. Over the next fortnight the highest UV index for Helsinki is 4, which is low to moderate.

How reliable is a 14 day forecast?

The first three to five days are generally very accurate. After that the certainty drops off and it is better read as a trend than as an exact daily prediction. Our data comes from Open-Meteo, which combines national weather models — among them the Met Office, DWD and ECMWF — and recomputes them several times a day using measurements from stations worldwide.

Forecast for Helsinki last updated: 29 August 2026 at 14:25. See also all Finland forecasts and the European weather map.

Frequently asked questions

Questions about the weather in Helsinki

What is the weather like in Helsinki in August 2026?

The forecast at the top of this page shows the current temperature in Helsinki plus the maximum and minimum for each of the next 14 days, with rainfall, chance of rain, sunshine hours and UV index. It is refreshed several times a day.

How accurate is the 14 day forecast for Helsinki?

The first three to five days for Helsinki are highly reliable. From day six onwards, read the forecast as a trend: it shows whether it turns warmer, cooler, wetter or drier rather than an exact value for that day.

Will it rain in Helsinki this week?

The rainfall chart on this page gives the expected millimetres per day for Helsinki, and each day card shows the chance of rain as a percentage. Below 20% with several hours of sunshine is a genuinely dry day.

How warm does it get in Helsinki over the next two weeks?

The temperature chart shows the maximum and minimum for every one of the next 14 days in Helsinki. The overview table underneath repeats the same figures day by day, together with the average across the fortnight.

Can I see the weather in Helsinki hour by hour?

Yes. The hourly chart covers the next 48 hours in Helsinki with temperature, feels-like temperature and chance of rain. Clicking any of the 14 days opens a panel with night, morning, afternoon and evening detail.

Where does the Helsinki forecast come from?

The data for Helsinki (Finland, Finland) comes from Open-Meteo, which combines national weather models such as those of the Met Office, DWD, Météo-France and ECMWF and recomputes them several times a day.

What does the UV index for Helsinki mean?

The UV index runs from 0 to 11+. Up to 2 is low, 3 to 5 moderate, 6 to 7 high and 8 or more very high. From 6 upwards it is worth using sun protection in the middle of the day, even when it does not feel especially hot.

Is the Helsinki weather forecast free?

Yes. The full 14 day forecast for Helsinki is free, needs no account and carries no adverts inside the charts.