Long Bay & Half Moon Bay beach & sargassum forecast
Long Bay, Antigua, AG · Leeward Islands (Anguilla to Antigua), Antigua & Barbuda · 17.133, -61.672
Updated : low seaweed, beach grade A-, sea 85°F.
Veabird's call
Friday is your window: A-, low seaweed and 25% rain despite 4.3 ft waves.
January and February grade best, with seaweed usually lowest in June on the east side.
Grades from Veabird's beach forecast; wording by AI (Muse Spark), checked against the forecast. Updated Nov 13, 06:00 UTC.
Tell me when Long Bay & Half Moon Bay is clear
One email when the seaweed clears or the beach grades A, at most once a week per beach. We only ask for your email address, and every email has a one-click unsubscribe.
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Questions about Long Bay & Half Moon Bay
Does Long Bay & Half Moon Bay get sargassum (seaweed)?
Yes, in season. Here the typical-year risk is moderate or higher from May to August and peaks in July (high). How much lands varies a lot by year, wind and currents.
What are the worst and best months for seaweed at Long Bay & Half Moon Bay?
Worst: July, when heavy seaweed is most likely. Best: September through April, when the risk is usually low.
How warm is the water at Long Bay & Half Moon Bay?
About 84°F in November. The sea is warmest in September (about 86°F) and coolest in February (about 80°F).
When is the best time to visit Long Bay & Half Moon Bay?
For warm water, low seaweed and dry weather, aim for November through March. November is usually the quietest of those, with about 17 rainy days and a sea near 84°F; seaweed risk is very low.
Are there sargassum barriers or beach cleanups at Long Bay & Half Moon Bay?
Offshore barriers in Leeward Islands: 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. Typical clearing time: Same-day at resorts; windward bays can stay fouled for weeks in peak years.
When is hurricane season at Long Bay & Half Moon Bay, and how often do storms hit?
The Atlantic hurricane season runs June through November and peaks around September. A tropical storm passed within 86 miles of Long Bay & Half Moon Bay in 23 of the 55 seasons from 1971 to 2025, and a hurricane within 58 miles in 10. The riskiest stretch is around August 27, when the chance of a storm passing in any one week is about 6%; across all of August it is about 18%. Flexible bookings and travel insurance help in the peak weeks.
Sargassum season at Long Bay & Half Moon Bay Resorts (East Antigua)
Sargassum risk at Long Bay & Half Moon Bay Resorts (East Antigua) typically peaks around July (high: moderate or heavier seaweed on the beach in an estimated 45% of weeks). Months most likely to see heavy seaweed: July. Lowest-risk months: January, February, March, April, September, October, November and December. Actual landings vary a lot by year, wind and currents; check the live conditions above.
Estimated share of weeks in each month with moderate or heavier seaweed on the beach. Veabird takes the landing season measured on Martinique's shores (Madininair's hydrogen-sulfide sensors beside stranding sites, 2018–2026) and scales it by how often NOAA AOML satellites see notable seaweed within about 20 km of this stretch of coast: 14% of weeks here on average, against 14% off Martinique, so the full season applies. The satellite share (2016–2024, the top fifth of all coast-weeks, adjusted for this beach's exposure of 95%) measures seaweed offshore, not on the sand: off the Riviera Maya it reads high even in winter, when little lands. Very low under 10%, Low 10–24%, Moderate 25–44%, High 45–69%, Very high 70%+. Beach faces 80°; onshore winds from that direction push seaweed ashore. Satellite sargassum data: USF Optical Oceanography Lab (Sargassum Watch System) via NOAA AOML. The satellite record as open data.
The Leeward Islands month by month
Typical weather, water temperature, seaweed and crowds for every month: the best time to visit the Leeward Islands.
- The Leeward Islands in January
- The Leeward Islands in February
- The Leeward Islands in March
- The Leeward Islands in April
- The Leeward Islands in May
- The Leeward Islands in June
- The Leeward Islands in July
- The Leeward Islands in August
- The Leeward Islands in September
- The Leeward Islands in October
- The Leeward Islands in November
- The Leeward Islands in December
Weather, water & seaweed by month at Long Bay & Half Moon Bay Resorts (East Antigua)
Average highs run from about 82°F in January and February to 88°F in August and September. The sea is warmest in September (about 86°F) and coolest in February (about 80°F). January and February are usually the driest, with about 15 rainy days each; July and September are the wettest, with about 21 rainy days. Seaweed risk is usually lowest in December and highest in July.
| Month | Avg high | Sea | Rainy days | Sargassum |
|---|---|---|---|---|
| Jan | 82°F | 81°F | 15 | Very low |
| Feb | 82°F | 80°F | 15 | Low |
| Mar | 83°F | 81°F | 17 | Low |
| Apr | 84°F | 82°F | 19 | Low |
| May | 86°F | 83°F | 20 | Moderate |
| Jun | 87°F | 84°F | 19 | Moderate |
| Jul | 87°F | 84°F | 21 | High |
| Aug | 88°F | 85°F | 20 | Moderate |
| Sep | 88°F | 86°F | 21 | Low |
| Oct | 86°F | 85°F | 20 | Very low |
| Nov | 84°F | 84°F | 17 | Very low |
| Dec | 83°F | 82°F | 16 | Very low |
Monthly averages from 6 years of ERA5 reanalysis (Open-Meteo) for this area's 0.5° grid cell; rainy days have at least 1 mm (0.04 in). Sargassum is the typical-year estimate described above. Any given year can differ.
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 Long Bay, Antigua, AG
- 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 Long Bay & Half Moon Bay Resorts (East Antigua). Change them to match the live forecast above.
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Nearest airports
- V. C. Bird Intl (Antigua) (ANU), ~13 km
Nearby resorts
- Villa Azura Long Bay, Antigua, AG · 4 km
- Cliffside Villa Antigua Long Bay, Antigua, AG · 4 km
- The Verandah Resort and Estates Long Bay, Antigua, AG · 4 km
- Grand Pineapple Beach Club Long Bay, Antigua, AG · 4 km
- Nonsuch Bay Resort Long Bay, Antigua, AG · 7 km
- Jumby Bay Island, Oetker Collection Long Island, AG · 9 km
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