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Kastösundet
Kastösundet is the narrow sound by Kastön, a small island in Biskopsö Nature Reserve out in Stockholms skärgård. You anchor off here among protected woodland and classic archipelago scenery — the kind of quiet that's hard to find this close to the city. The reserve status keeps the surroundings raw and undeveloped, so expect rocky shores, pine forest, and very little else.
Marinas and anchorages near Kastösundet · times are dock to dock
Based on AIS data
quiet → busy
Popular Times
How full it gets, by local hour — tallest when the most boats are here.
00:0006:0012:0018:0023:00
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- Busiest on Saturdays and Sundays
- Fullest around 02:00, emptiest around 11:00
- Half the boats arrive by 15:00
- 85% of visits are overnight
- Typical day stop: ~4h · max recorded 18 boats
Plan a Passage
Popular
21 legs boats have actually been recorded sailing.
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