Salt Whistle Bay is a perfect crescent of white sand on the northern tip of Mayreau, sheltered by a rim of palms and sea grape trees. The water is an improbable shade of turquoise and almost always calm, protected from the Atlantic swell by the curve of the bay. On most days you will share it with a handful of yachts at anchor and not much else.
The beach is shallow for a long way out, which makes it safe for swimming even for children. Snorkelling along the edges of the bay turns up coral heads and small reef fish. There is a small beach bar that opens when the owner feels like it, serving cold beers and basic food. Come prepared with your own supplies to be safe.
Getting here requires either arriving by yacht or catching the water taxi from Union Island. The island's main village and the bay are on opposite sides; even if you are staying on Mayreau you will need to walk over the hill or take a short boat ride.