St Barts Weather in May – Climate, Sea, Wind & Travel Conditions
May in Saint Barthelemy still offers pleasant conditions but marks the transition to low season. Temperatures range between 24C (75F) and 30C (86F), the sea reaches 27C (81F), and crowds drop dramatically after Easter.
Why visit in May? Rates become very attractive (-30 to 50% on accommodations and villas), beaches regain their tranquility, and showers remain brief and refreshing. It's the ideal month to discover the island authentically with excellent value for money.
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Weather overview in May in St Barts
May marks the beginning of low season in Saint Barthelemy, still offering pleasant conditions but with more frequent showers. Temperatures remain stable, ranging between 24C (75F) and 30C (86F), with trade winds gradually weakening.
Notable weather phenomena in May
Start of wet season
Showers become more frequent in May but generally remain short and refreshing. They often occur in late afternoon or at night, leaving sunny mornings to enjoy the beaches.
Decreasing trade winds
Trade winds lose intensity and become more irregular. The air becomes warmer and more humid but remains bearable thanks to the sea breeze.
First sargassum arrivals
May marks the first significant sargassum arrivals on some exposed beaches (Marigot, Grand Cul-de-Sac). Cleaning services are active but accumulations can be significant.
Temperatures and wind conditions
Air temperatures
Temperatures start to rise with increasing humidity. Nights remain warm and days can be very sunny.
Wind conditions
Wind is lighter and less consistent. Conditions are calm for sailing but less refreshing.
Sea temperature and ocean conditions
Water temperature
27C (81F)
Warm and pleasant
Sea state
Calm
Excellent for swimming
Visibility
18-25 meters (60-80 ft)
Very good for diving
Recommended water activities
Rainfall and humidity levels
Precipitation
Humidity
Humidity increases noticeably in May, making days more muggy. The sea breeze helps offset this feeling.
Natural risks in May
Hurricane risk
May falls just before the start of hurricane season. Hurricanes are extremely rare this month, but it's wise to monitor weather forecasts regularly, especially at the end of the month.
Sargassum risk
May is one of the months most impacted by sargassum. East and south coast beaches (Grand Cul-de-Sac, Marigot, Grand Fond) may experience significant accumulations. Prefer west coast beaches (Colombier, Flamands, Shell Beach) which are less affected.
Saharan dust
Saharan dust haze is still rare in May. A few episodes may occur but they are generally light and short-lived.
Vegetation and landscapes
Lush vegetation
May sees vegetation turning green with the first regular rains. Hills are adorned with shades of tender green, flamboyant trees start blooming, and the island regains its lush tropical appearance. It's a beautiful time for landscape photography.
Positive points
- Green landscapes
- Spectacular blooms
- Tropical fragrances
To note
- - More mosquitoes after rains
- - Higher humidity
- - Slippery hiking trails
Visitor numbers, pollution and noise
Tourist attendance
Attendance drops sharply in May. Tourists are scarce, direct flights decrease, and the island returns to calm. It's an ideal time to enjoy deserted beaches and a more authentic atmosphere.
Positive impact
- - Nearly deserted beaches
- - Restaurants accessible without reservation
- - Authentic local atmosphere
- - Attractive rates (hotels -30 to -50%)
To consider
- - Some establishments closed
- - Fewer direct flights
- - Limited nightlife
Road traffic
Traffic is very light with few rental vehicles. Pleasant driving and easy parking everywhere.
Construction work
Low season is conducive to maintenance and renovation work. Some roads or establishments may be under construction.
Air pollution
With low attendance, the air is pure and environmental quality is optimal. Trade winds constantly renew the air.
Is May a good time to visit St Barts?
YES, May offers excellent value for money
May is ideal for travelers seeking peace, who don't mind brief tropical showers, and want to take advantage of very attractive rates. Tourist attendance is low, beaches are nearly deserted, and seawater is particularly warm (27C/81F). It's the perfect time to discover the island in its authenticity, away from high season crowds.
Perfect for
- + Couples seeking tranquility
- + Budget-conscious travelers
- + Diving and snorkeling
- + Photographers (lush vegetation)
Avoid if
- - Intolerance to showers
- - Need for lively nightlife
- - Sensitivity to sargassum
- - Preference for 100% dry weather
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