SeasonMapMariehamn (Aland) weather in August
Åland Islands
August in Mariehamn: nice, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Mariehamn · #680 of 1383 destinations to visit in August · comfort 80/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Mariehamn in August
No notes yet. Open Mariehamn on the map to add the first one.
Mariehamn climate normals — August
| Daytime high | 19°C / 65°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Sea temperature | 18°C / 64°F | 🧊 bracing |
| Rainfall | 73 mm / 2.9 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 15°C / 58°F | |
| Sunshine | 11.5 h/day | |
| Daylight | 15.6 h | |
| Wind | 22 km/h / 14 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Mariehamn in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyschool holidays in 7 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Mariehamn's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherMariehamn's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Mariehamn in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Archipelago summer season
15 May – 10 Sep · usuallySummer season opensThe inter-island ferries move to the full timetable, the guest harbours and the Pommern open up, and the cafes on Torggatan put tables outside. Outside this window a lot of it simply is not running. Source ↗
Nearby, and something's on
Within 300 km of Mariehamn — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Mariehamn?
Mariehamn in August — FAQ
- Is August a good time to visit Mariehamn?
- August in Mariehamn: nice, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Mariehamn on SeasonMap's comfort score (80/100).
- What is the weather like in Mariehamn in August?
- In August, Mariehamn averages a daily high of 18.5°C and a low of 15.8°C, with about 72.7 mm of rain over roughly 13.2 rainy days.
- What is the air quality in Mariehamn in August?
- Mariehamn has a mean US Air Quality Index of about 37 in August.
Other months in Mariehamn
Compare Mariehamn in August
Warmer or cooler than Mariehamn in August
Similar destinations in Northern Europe — August
Within 300 km: Stockholm's Stockholm Pride around 25 Jul – 10 Aug, and Helsinki's Berry and crayfish season around 20 Jul – 10 Sep.