Le Sereno: sargassum, weather & water today
Grand Cul-de-Sac, St. Barthélemy · Leeward Islands (Anguilla to Antigua), Antigua & Barbuda · 17.911, -62.803
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Sargassum season at Le Sereno
Sargassum risk at Le Sereno typically peaks around June (very high in a typical year). Months most likely to see heavy seaweed: March, April, May, June, July, August, September. Lowest-risk months: January, December. Actual landings vary a lot by year, wind and currents; check the live conditions above.
Typical-year risk from the published seasonality of the Great Atlantic Sargassum Belt × this beach's exposure (90%). Beach faces 60°; onshore winds from that direction push seaweed ashore.
| Month | Typical risk |
|---|---|
| January | Low |
| February | Moderate |
| March | High |
| April | High |
| May | Very high |
| June | Very high |
| July | Very high |
| August | Very high |
| September | High |
| October | Moderate |
| November | Moderate |
| December | Low |
Cleanup & barriers
- Offshore barriers
- Few booms (some in St. Martin/St. Barths lagoons)
- Public cleanup
- Collectivité crews on French side; hotels elsewhere; Orient Bay and Grand Cul-de-Sac frequently inundated
- Resort crews
- Luxury resorts rake daily
- Typical clearing time
- Same-day at resorts; windward bays can stay fouled for weeks in peak years
Safety notes
US State Dept: Antigua & Barbuda, St. Kitts & Nevis, Anguilla Level 1; Sint Maarten Level 1; St. Martin (France) Level 2 per France (verify)
- Petty and vehicle crime in Philipsburg/Marigot; watch valuables
- Drive left on English islands, right on French side
- High hurricane exposure (Irma 2017, Luis 1995)
Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.
Things to do near Grand Cul-de-Sac, St. Barthélemy
- Nelson's Dockyard, Antigua
- Shoal Bay East, Anguilla
- Maho Beach plane-spotting, SXM
- Gustavia shopping, St. Barths
- Brimstone Hill Fortress, St. Kitts
- Barbuda Frigate Bird Sanctuary
Fly in for the best beach days
Suggested dates fall in December, typically the lowest-seaweed month ahead for Le Sereno. Change them to match the live forecast above.
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Nearest airports
- Gustaf III (St. Barthélemy) (SBH), ~4 km
- Princess Juliana Intl (Sint Maarten) (SXM), ~35 km
Nearby resorts
- Rosewood Le Guanahani Grand Cul-de-Sac, St. Barthélemy · 1 km
- Eden Rock - St Barths St-Jean, St. Barthélemy · 4 km
- Cheval Blanc St-Barth Isle de France Flamands, St. Barthélemy · 6 km
- Oyster Bay Beach Resort Oyster Pond, Sint Maarten · 27 km
- Orient Bay Beach Resorts Orient Bay, St. Martin · 30 km
- Simpson Bay Beach Resorts Simpson Bay, Sint Maarten · 34 km
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