Stora Dyrön, Sydhamnen (Tjörns kommun)

Dyrön has two harbours, and Sydhamnen (the south harbour) pulls double duty as both a guest marina and home base for the island's own residents — which gives it a lived-in, unhurried feel rather than a purely transactional stop. It sits right at the mouth of Hake Fjord with a max depth of 3.5 m, and you can reach the harbour master on +46 705 66 67 95. The island itself is car-free, so once you're tied up you're exploring on foot or by bike through classic west-coast Swedish scenery.