Magens Bay Beach Area: sargassum, weather & water today

Magens Bay, St. Thomas, VI · U.S. Virgin Islands, U.S. Virgin Islands · 18.370, -64.930

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Sargassum season at Magens Bay Beach Area

Sargassum risk at Magens Bay Beach Area typically peaks around June (moderate in a typical year). Lowest-risk months: January, February, March, September, October, November, December. Actual landings vary a lot by year, wind and currents; check the live conditions above.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Typical-year risk from the published seasonality of the Great Atlantic Sargassum Belt × this beach's exposure (40%). Beach faces 10°; onshore winds from that direction push seaweed ashore.

Month	Typical risk
January	Low
February	Low
March	Low
April	Moderate
May	Moderate
June	Moderate
July	Moderate
August	Moderate
September	Low
October	Low
November	Low
December	Low

Cleanup & barriers

Offshore barriers: No offshore barriers; occasional booms at a few resorts
Public cleanup: Territorial DPNR / hotel crews rake affected beaches; east-end St. Croix and St. Thomas bays hit hardest
Resort crews: Large resorts clear frontage daily in season
Typical clearing time: Same-day at resorts; public beaches can lag days

Safety notes

US territory - no State Dept advisory (verify local guidance)

Petty theft and car break-ins; avoid isolated areas at night in Charlotte Amalie and Christiansted
Drive on the left; steep, narrow roads
2017 Irma/Maria showed high hurricane exposure Aug-Oct

Check official advisories and local flags before swimming. Decomposing sargassum releases hydrogen sulfide; avoid heavy piles.

Things to do near Magens Bay, St. Thomas, VI

Trunk Bay underwater trail (St. John)
Virgin Islands National Park hikes
Magens Bay
Buck Island Reef National Monument
Christiansted historic district
Day sail to the BVI

Fly in for the best beach days

Suggested dates fall in December, typically the lowest-seaweed month ahead for Magens Bay Beach Area. Change them to match the live forecast above.

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Nearest airports

Cyril E. King (St. Thomas) (STT), ~6 km

Nearby resorts

Frenchman's Reef Marriott (Morning Star Beach) Charlotte Amalie, St. Thomas, VI · 5 km
Bolongo Bay Beach Resort Bolongo Bay, St. Thomas, VI · 8 km
Sugar Bay Resort & Spa Smith Bay, St. Thomas, VI · 8 km
Secret Harbour Beach Resort Nazareth Bay, St. Thomas, VI · 10 km
The Ritz-Carlton, St. Thomas Great Bay, St. Thomas, VI · 10 km
Caneel Bay / North Shore St. John Beaches Cruz Bay, St. John, VI · 15 km

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