What's on in Mariehamn (Aland), Åland Islands through the year
Mariehamn, Åland Islands has 5 curated events through the year — 1 festival, 2 holidays, 1 season and 1 seasonal opening. The ones to plan around: Skordefesten harvest festival (September) and Archipelago summer season (May). January and June are its peak-crowd months.
Updated September 2026 · every event curated and sourced · dates for 2026 where they are announced, the usual window where they are not
Best time to visit Mariehamn (Aland): weather, crowds and notes →
Mariehamn (Aland) events and crowds by month
| Month | What starts | Crowds |
|---|---|---|
| January | — | Peak crowds |
| February | — | Shoulder season |
| March | — | Shoulder season |
| April | — | Shoulder season |
| May | Archipelago summer season | Shoulder season |
| June | Aland Autonomy Day, Midsummer | Peak crowds |
| July | — | Busy |
| August | — | Busy |
| September | Skordefesten harvest festival | Shoulder season |
| October | — | Shoulder season |
| November | Winter on the islands | Quiet |
| December | — | Quiet |
January in Mariehamn (Aland)
Mariehamn (Aland) weather in January →Peak crowds — travelers describe it as peak season, school holidays in 7 of the markets that fill it
Nothing new starts in January.
Still on: Winter on the islands (1 Nov – 15 Apr (usually))
February in Mariehamn (Aland)
Mariehamn (Aland) weather in February →Shoulder season — school holidays in 3 of the markets that fill it, an ordinary month
Nothing new starts in February.
Still on: Winter on the islands (1 Nov – 15 Apr (usually))
March in Mariehamn (Aland)
Mariehamn (Aland) weather in March →Shoulder season — school holidays in 4 of the markets that fill it, an ordinary month
Nothing new starts in March.
Still on: Winter on the islands (1 Nov – 15 Apr (usually))
April in Mariehamn (Aland)
Mariehamn (Aland) weather in April →Shoulder season — school holidays in 6 of the markets that fill it, an ordinary month
Nothing new starts in April.
Still on: Winter on the islands (1 Nov – 15 Apr (usually))
May in Mariehamn (Aland)
Mariehamn (Aland) weather in May →Shoulder season — school holidays in 4 of the markets that fill it, an ordinary month
- 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 ↗
June in Mariehamn (Aland)
Mariehamn (Aland) weather in June →Peak crowds — Aland Autonomy Day, Midsummer
- Holiday
Aland Autonomy Day
9 JunNational holidayClosuresThe islands' own public holiday on 9 June, marked with a ceremony at the parliament in Mariehamn. Offices close here but not on the Finnish mainland, which catches out anyone crossing that day. Source ↗
- Holiday
Midsummer
19–26 Jun · usuallyNational holidayClosuresAland raises its own decorated midsummer poles village by village on the Saturday, a tradition distinct from the Swedish and Finnish versions. Shops shut and the islands turn inward for two days. Source ↗
Still on: Archipelago summer season (15 May – 10 Sep (usually))
July in Mariehamn (Aland)
Mariehamn (Aland) weather in July →Busy — school holidays in 7 of the markets that fill it, one of its best months for weather
Nothing new starts in July.
Still on: Archipelago summer season (15 May – 10 Sep (usually))
August in Mariehamn (Aland)
Mariehamn (Aland) weather in August →Busy — school holidays in 7 of the markets that fill it, one of its best months for weather
Nothing new starts in August.
Still on: Archipelago summer season (15 May – 10 Sep (usually))
September in Mariehamn (Aland)
Mariehamn (Aland) weather in September →Shoulder season — school holidays in 3 of the markets that fill it, an ordinary month
- Festival
Skordefesten harvest festival
15–22 Sep · usuallyFarms, smokehouses and small producers across the islands open their gates for a weekend in the third week of September, with a shuttle bus doing the rounds. It is the last busy weekend of the year here. Source ↗
Still on: Archipelago summer season (15 May – 10 Sep (usually))
October in Mariehamn (Aland)
Mariehamn (Aland) weather in October →Shoulder season — school holidays in 4 of the markets that fill it, an ordinary month
Nothing new starts in October.
November in Mariehamn (Aland)
Mariehamn (Aland) weather in November →Quiet — school holidays in 2 of the markets that fill it, one of its worst months for weather
- Season
Winter on the islands
1 Nov – 15 Apr · usuallyOff-season shutdownClosuresMost of the guest harbours, museums and summer restaurants close and the small archipelago routes drop to a skeleton timetable. The big Stockholm and Turku ferries still call, so getting here is never the problem.
December in Mariehamn (Aland)
Mariehamn (Aland) weather in December →Quiet — school holidays in 7 of the markets that fill it, one of its worst months for weather
Nothing new starts in December.
Still on: Winter on the islands (1 Nov – 15 Apr (usually))