For visiting boats
Isosaari is a former military island in Helsinki’s outer archipelago, opened to visitors in 2017. Its guest harbour is announced as closed until further notice. There are two areas: the Main Harbour for boats over 30 ft and over 1.5 m draught (at least 3 m deep), and the Lagoon, sheltered in all winds, for boats up to 30 ft and 2 m draught. Anchoring in the harbour areas is strictly forbidden because of Defence Forces cables.
- Guest berths
- Closed until further notice (check before setting out). No anchoring.
- Limits
- draught up to 2.0 m
- Position
- 60°6.27′ N 25°4.03′ E (60.10458, 25.06710)
- Phone
- +358 44 7634768
Prices
| Overnight (buoy/boom) | €28 / night |
|---|---|
| Alongside 25 m, by arrangement | €100 / night |
Price list → · checked 18 Oct 2026 – prices may change
© OpenStreetMap · OpenSeaMap — sea marks for the approach
VESSELSOS APP · FREE
Sailing here? Take VesselSOS with you.
- Family see you from shoreA live link in any browser – they don’t need the app.
- One tap to the right rescue centreHere MRCC Turku – the app switches centre as you move, with your position and call script even without signal.
- Return-time checkIf you’re not back in time, your people know.
- Shared hazard mapRocks, nets and other hazards reported by other boaters.
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Frequently asked
How deep is the marina?
It takes boats with up to 2.0 m draught.
Who do I call in an emergency at sea here?
Sea rescue: MRCC Turku +358 294 1000. Or call 112. On the radio: MAYDAY on VHF channel 16.