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

MonthWhat startsCrowds
JanuaryPeak crowds
FebruaryShoulder season
MarchShoulder season
AprilShoulder season
MayArchipelago summer seasonShoulder season
JuneAland Autonomy Day, MidsummerPeak crowds
JulyBusy
AugustBusy
SeptemberSkordefesten harvest festivalShoulder season
OctoberShoulder season
NovemberWinter on the islandsQuiet
DecemberQuiet

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 opens

    The 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 holidayClosures

    The 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 holidayClosures

    Aland 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 · usually

    Farms, 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 shutdownClosures

    Most 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))

Around the world