Many of the uninhabited islands are protected as nature reserves and there are some restrictions regarding landing or approach which must be observed. Islands which are open all year: White Island, off Samson;
Rosevean; Gweal; Samson; Eastern Islands; St Helen's; Puffin Island;
White Island off St Martin's; Northwethal Tean (Please take care not to disturb the ringed plovers and terns nesting above the high water mark on this island).
Islands closed from April 15th to August 20th, except by permit: Annet; Norrard Rocks including Castle Bryher, Illiswillig, Maiden's Bower, Mincarlo and Scilly Rock; the Western
Rocks including Crebwethan, Gorregan, Melledgan, and Rosevear; Stony
Island and Green Island off Samson; Menavaur off St Helen's.
All vessels are prohibited from anchoring in the channel or harbour approaches. No charge for keelage outside the harbour limits: other anchorages at New Grimsby, Tresco Channel, Porthconger, Watermill Cove and Porthcressa
Visitors are requested not to use moorings belonging to local residents.