Sargassum at Marigot Beach (Marigot Bay): today's conditions
Clear
Clean, dive in
Marigot Beach sits on a palm-studded spit of sand deep inside Marigot Bay, on the west coast of Saint Lucia. The bay, narrow and cut far into the hills, is a famed anchorage for yachts; the beach itself is usually reached by a short hop across the water.
This page follows sargassum across the western sector: a 0 to 5 rating reassessed every morning, a map placing Marigot among its neighbouring beaches, and enough detail to judge whether the day suits a swim or a paddle at the head of the bay.
Marigot Beach on the sargassum map
What to know about this beach
Few shores are this tucked away: the beach faces south-west inside an inlet that the surrounding hills almost seal shut. The flow carried by the trade winds lands on the island's Atlantic face first; Marigot, on the leeward Caribbean side, sees only leftovers.
That geography cuts both ways. The narrow entrance lets very little weed in, but anything that does enter such an enclosed pool drains out slowly: a small deposit can linger for days at the back of the bay. The morning rating is precisely what tells a fading episode from one that is settling in.
Frequently asked questions
Does sargassum often enter Marigot Bay?
Very rarely. The entrance is narrow, it faces away from the trade winds, and the west coast of Saint Lucia is already the island's most sheltered. Most seasons pass without a real episode.
What happens when a mat gets in anyway?
In such an enclosed basin the water renews slowly: a deposit can stay visible for a few days at the head of the bay before dispersing. The daily rating on this page lets you watch it fade.
Is the rating useful for boats at anchor too?
The score describes the shore and the nearby water, which matters to sailors as much as to swimmers: a cluttered bay shows up on the sector map before you even commit to entering.
Marigot Beach or Anse Chastanet for the day?
Both sit in the same western sector and are rarely affected at the same time. Marigot offers flat, enclosed water; Anse Chastanet an open shore prized for its seabed: compare the two morning scores.
When should I pay closer attention at Marigot?
As elsewhere in the Caribbean, most arrivals happen between spring and late summer. Even then, the bay remains one of the calmest corners of the island in this respect.