Sargassum at Mullet Bay (Sint Maarten): today's conditions
Clear
Clean, go for it
Mullet Bay curves along the south-west shore of Sint Maarten, the Dutch side of the island, minutes from the airport and beside the golf course that backs the bay. This page tracks sargassum at Mullet Bay day by day: what the shoreline looked like this morning, a rating from 0 to 5, and a map of the whole south coast.
The reading is refreshed every morning, before beach hours, so you can decide over breakfast rather than after the drive. The rating gives you the headline, the map shows how the neighbouring bays compare on the same date, and the notes below explain why this stretch of sand behaves the way it does.
Mullet Bay on the sargassum map
What to know about this beach
Mullet Bay faces south-west, on the Caribbean side of the island. That is the leeward shore: easterly trade winds push sargassum rafts onto Atlantic-facing coasts first, and this bay sits away from that direct path. Landings here tend to be rarer, and to arrive later in an episode, than on the exposed eastern beaches of Saint-Martin.
Rarer is not never. When a raft wraps around the southern tip of the island, or a swell lines up with the mouth of the bay, weed can gather along the waterline of this long sandy curve. The south-west aspect also ties Mullet Bay to Cupecoy and Simpson Bay: the three often shift together, which the map makes easy to check in one go.
Frequently asked questions
Is Mullet Bay badly affected by sargassum?
Not often. It sits on the Caribbean coast facing south-west, sheltered from the trade-driven drift that reaches the Atlantic side first. Episodes do happen, but they are usually shorter and lighter here than on eastern beaches.
How do I check Mullet Bay before heading down?
Open this page in the morning. The FanGass map is updated daily and gives the bay a rating from 0 to 5, from clean sand to a heavy landing, before you leave your hotel.
When is sargassum most likely here?
Caribbean arrivals run mostly from spring into autumn, with frequent peaks between May and September. On this leeward coast the effect is muted, but those months are still worth checking day by day.
Which beaches should I try if Mullet Bay is covered?
Cupecoy sits just west, Simpson Bay just east, and both share the same southern exposure. The map shows all three at once, so you can pick a beach before crossing the island.