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Weather in Turku - 14-day forecast

Detailed weather forecast for Turku, Finland: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Turku
today🌧️ 16°💧 1.3 mm
Sun🌤️ 17°💧 1.5 mm
Mon🌧️ 15°💧 0.1 mm
Tue🌧️ 17°💧 3.3 mm
Wed🌧️ 16°💧 3.4 mm
Thu🌧️ 15°💧 9.2 mm
Fri🌧️ 15°💧 1.5 mm
Sat🌧️ 16°💧 0.3 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Monday 7 Sept in Turku, the forecast high is 15°C. Typical daytime temperatures at this time of year range from 14°C to 20°C, so it will be cooler than usual. It is cooler than 79% of similar days.

16°Cnear normal
usually 15°C–20°C
night: near normal rain: typical rainfall wind: exceptionally strong
17°Cnear normal
usually 15°C–20°C
night: near normal rain: typical rainfall wind: exceptionally strong
15°Ccooler than usual
usually 14°C–20°C
cooler than 79% of similar days
night: exceptionally warm rain: typical rainfall wind: stronger than usual
17°Cnear normal
usually 14°C–20°C
night: exceptionally warm rain: more rain than usual wind: exceptionally strong
16°Cnear normal
usually 14°C–19°C
night: exceptionally warm rain: more rain than usual wind: exceptionally strong
15°Ccooler than usual
usually 14°C–19°C
cooler than 72% of similar days
night: warmer than usual rain: exceptionally wet wind: exceptionally strong
15°Cnear normal
usually 14°C–19°C
night: warmer than usual rain: typical rainfall wind: stronger than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
10°20°30° 1981: 16°C1982: 14°C1983: 15°C1984: 14°C1985: 15°C1986: 12°C1987: 15°C1988: 18°C1989: 16°C1990: 15°C1991: 12°C1992: 15°C1993: 13°C1994: 16°C1995: 17°C1996: 13°C1997: 16°C1998: 17°C1999: 21°C2000: 15°C2001: 15°C2002: 21°C2003: 20°C2004: 16°C2005: 18°C2006: 17°C2007: 15°C2008: 14°C2009: 19°C2010: 18°C2011: 18°C2012: 15°C2013: 20°C2014: 20°C2015: 17°C2016: 19°C2017: 16°C2018: 22°C2019: 18°C2020: 16°C2021: 17°C2022: 17°C2023: 20°C2024: 23°C2025: 23°C 2026 forecast: 16°C current forecast 16°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 17°C by day. The coolest year was 1986 (12°C) and the warmest was 2024 (23°C). The current forecast averages 16°C - lower than in 62% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

Weather warnings - Turku

No active weather warnings for Turku (region: Varsinais-Suomi). The national weather service is not forecasting dangerous conditions.

14-day forecast - Turku

Turku - 14-day weather forecast infographic

Turku 30 & 45-day weather - long-range outlook

Next 16 days · forecast
15°
around 12° at night · days with rain: 9
Weeks 3-4 · avg for September
16°
around 7° at night · rain chance 42%
Weeks 5-7 · avg for October
9°
around 2° at night · rain chance 45%
The 30 & 45-day outlook for Turku: the next 16 days are a numerical forecast updated daily - on average 15° by day and 12° at night. Further out we rely on multi-year climate averages: around 16° in September, and about 9° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Turku

Saturday5 September 2026
🌧️16°light rain
sunrise 06:33 · sunset 20:25 · night 9° · evening 15° · rain 1.29 mm · humidity 51% · wind 5 m/s · clouds 68%
Sunday6 September 2026
🌤️17°a few clouds
sunrise 06:36 · sunset 20:22 · night 9° · evening 15° · rain 1.46 mm · humidity 52% · wind 7 m/s · clouds 23%
Monday7 September 2026
🌧️15°light rain
sunrise 06:38 · sunset 20:19 · night 14° · evening 15° · rain 0.14 mm · humidity 61% · wind 5 m/s · clouds 73%
Tuesday8 September 2026
🌧️17°moderate rain
sunrise 06:40 · sunset 20:16 · night 15° · evening 15° · rain 3.34 mm · humidity 83% · wind 7 m/s · clouds 100%
Wednesday9 September 2026
🌧️16°light rain
sunrise 06:43 · sunset 20:13 · night 13° · evening 16° · rain 3.39 mm · humidity 80% · wind 7 m/s · clouds 17%
Thursday10 September 2026
🌧️15°light rain
sunrise 06:45 · sunset 20:09 · night 12° · evening 14° · rain 9.24 mm · humidity 82% · wind 6 m/s · clouds 100%
Friday11 September 2026
🌧️15°light rain
sunrise 06:48 · sunset 20:06 · night 12° · evening 14° · rain 1.47 mm · humidity 70% · wind 5 m/s · clouds 14%
Saturday12 September 2026
🌧️16°light rain
sunrise 06:50 · sunset 20:03 · night 13° · evening 15° · rain 0.27 mm · humidity 71% · wind 5 m/s · clouds 100%
Sunday13 September 2026
🌧️15°light rain
sunrise 06:52 · sunset 20:00 · night 12° · evening 13° · rain 3.06 mm · humidity 79% · wind 6 m/s · clouds 97%
Monday14 September 2026
🌧️12°light rain
sunrise 06:55 · sunset 19:57 · night 8° · evening 10° · rain 0.12 mm · humidity 48% · wind 7 m/s · clouds 55%
Tuesday15 September 2026
🌧️12°light rain
sunrise 06:57 · sunset 19:54 · night 13° · evening 13° · rain 0.66 mm · humidity 64% · wind 6 m/s · clouds 100%
Wednesday16 September 2026
🌧️14°light rain
sunrise 06:59 · sunset 19:51 · night 15° · evening 14° · rain 1.41 mm · humidity 85% · wind 6 m/s · clouds 100%
Thursday17 September 2026
🌧️14°light rain
sunrise 07:02 · sunset 19:48 · night 13° · evening 15° · rain 0.48 mm · humidity 85% · wind 4 m/s · clouds 100%
Friday18 September 2026
🌧️15°light rain
sunrise 07:04 · sunset 19:45 · night 13° · evening 14° · rain 1.08 mm · humidity 88% · wind 4 m/s · clouds 48%
Saturday19 September 2026
🌤️18°a few clouds
sunrise 07:07 · sunset 19:42 · night 14° · evening 16° · humidity 74% · wind 4 m/s · clouds 13%
Sunday20 September 2026
🌤️18°scattered clouds
sunrise 07:09 · sunset 19:38 · night 14° · evening 16° · humidity 72% · wind 5 m/s · clouds 29%

UV index in Turku - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTTurku03681111+3.9UV MODERATEtoday, daily maxSeek shade around midday. SPF 30+, sunglasses and ahat for longer stays.Unprotected fair skin may burn in about 50 min4Sat5.094Sun6.094Mon7.091Tue8.094Wed9.093Thu10.092Fri11.092Sat12.092Sun13.091Mon14.093Tue15.091Wed16.093Thu17.093Fri18.093Sat19.093Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Turku is 4 (moderate) - unprotected fair skin can burn in about 50 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

Pollen in Turku - info for allergy sufferers

PLANT POLLEN · 4-DAY FORECASTTurkuHighest pollen today: Ragweed1 grains/m³ · low leveltoday5.09tomorrow6.09Mon7.09Tue8.09Ragweed12--nonelowmoderatehighvery highoff season: alder, birch, grasses, mugwort, olive · values in grains/m³ (daily peak)pogodapodroze.pl · 2026-09-05
Today ragweed pollen is highest in Turku - about 1 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

Sea temperature - Turku

Water today
18°C
Week avg
17°C
Waves today
0 m
How's the water?
cold
16-day sea temperature forecast:
5.09 18°C6.09 17°C7.09 18°C8.09 17°C9.09 17°C10.09 17°C11.09 17°C12.09 16°C13.09 16°C
Average sea temperature through the year:
Jan 0°CFeb 0°CMar 1°CApr 5°CMay 12°CJun 19°CJul 22°CAug 21°CSep 17°COct 10°CNov 5°CDec 1°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Turku

Air quality in Turku is currently very good. Fine particulate PM2.5: 2.7 µg/m³, PM10: 3.4 µg/m³.
CityPM2.5 (µg/m³)PM10 (µg/m³)Air quality
Turku2.73.4very good
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-05, 04:00).

Turku weather through the year

Turku - annual climate

Warmest, driest months on average: May, June, July, August.

Upcoming public holidays in Finland: All Saints' Day — 31 October · Independence Day — 6 December · Christmas Eve — 24 December.

Nearby and related places

PoriEspooMariehamnTampereVantaaRovaniemiHelsinki

FAQ - Turku weather

What is the weather like in Turku today?
Today it is about 16° during the day and 9° at night, light rain.
How far ahead can I check the forecast for Turku?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.