Sargassum at Plage du Diamant: today's beach report
Clear
Good to go
Plage du Diamant runs along the southern shore of Martinique, in the town of Le Diamant, opposite the rock that gave the beach its name. This page tracks sargassum at Plage du Diamant one day at a time: conditions observed this morning, a rating from 0 to 5, and a map of the surrounding coast.
The reading is refreshed every morning, early enough to decide whether to load the car or pick another spot. You can see at a glance whether the sand is clear, whether rafts are drifting offshore, or whether weed has piled up on the shoreline, and compare with the other beaches along the same stretch.
Plage du Diamant on the sargassum map
What to know about this beach
Le Diamant faces the open south of the island, and that matters more than anything else here. Trade winds and swell arriving from the east push floating rafts toward this coast rather than holding them out at sea, which is why the beach behaves differently from the sheltered leeward bays a short drive away.
The beach itself faces due south, so it rarely takes an arrival head-on the way an east-facing shore does, but nothing screens it once a bank has entered the channel. The sand runs long, and conditions often differ from one end to the other: one section can be loaded while another stays open. The whole southern Atlantic stretch, shared with Les Salines and Le Marin, tends to react to the same episodes, so a daily reading tells you more than a seasonal average.
Frequently asked questions
Why does Plage du Diamant get sargassum?
It sits on Martinique's exposed southern shore, open to the sea. Easterly trade winds and swell carry drifting rafts onto this coast instead of pushing them away, unlike the sheltered bays on the leeward Caribbean side.
How do I check the beach before driving there?
Open the FanGass map at the top of this page. It is updated every morning and gives Plage du Diamant a rating from 0 to 5, from clear sand through to weed settled along the shoreline.
Is there a worse season for seaweed at Le Diamant?
Arrivals usually cluster between spring and late autumn, but the scale of each year varies widely. No month guarantees an open beach, so the morning reading remains the only reliable check before you go.
Where can I go instead if the beach is covered?
Head for the leeward Caribbean side, towards Les Anses-d'Arlet or Sainte-Luce. Those bays sit behind the island and take fewer arrivals, and each one has its own page with the same daily rating to compare.