St Barts Weather in August – Climate, Sea, Wind & Travel Conditions
August in Saint Barthelemy is the hottest and most intense month of the year with temperatures of 25-32C (77-90F), crushing humidity, and the peak of hurricane season. The sea reaches its maximum of 29C (84F). Tourist attendance is at its lowest with an almost deserted island.
Why choose August? It's the month of absolute minimum rates (-70% and more), allowing tropical luxury otherwise inaccessible. However, it requires great tolerance to intense heat and acceptance of hurricane risk. Perfect for flexible travelers seeking the most authentic experience possible.
Weather overview in August in St Barts
August is the hottest and most intense month of the year in Saint Barthelemy. Temperatures reach their absolute maximum (25-32C / 77-90F) with crushing humidity. It's also the peak of hurricane season with the highest probability of tropical storms or hurricanes.
The sea reaches its maximum temperature of 29C (84F), almost too warm to cool off. Showers are frequent and sometimes violent. The island is nearly deserted, offering an ultra-authentic experience but requiring great heat tolerance and constant weather vigilance.
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Notable weather phenomena in August
Peak hurricane season
August represents the peak of hurricane activity in the Atlantic. Major hurricanes can form and move quickly. Daily weather monitoring is absolutely essential. Historically, several major hurricanes have struck in August.
Maximum heat
August holds the annual heat record. Feels-like temperatures regularly exceed 38C (100F). The air is saturated with humidity making any daytime activity extremely grueling. Locals stay air-conditioned and only go out in early morning or evening.
Extremely glassy sea
In the absence of hurricanes, the ocean is impressively calm. Turquoise waters are crystal clear and perfect for observing the seabed. Marine life is abundant with exceptional visibility.
Temperatures and wind conditions
Air temperatures
Annual heat record. Stifling nights with no relief. Air conditioning essential 24/7. Very high dehydration risk.
Wind conditions
Minimal to non-existent wind. Stagnant, suffocating air. No breeze to relieve the heat. Permanently stifling conditions.
Sea temperature and ocean conditions
Water temperature
29C (84F)
Annual maximum - very warm bath
Sea state
Dead calm
Except during hurricanes
Visibility
20-30 meters (65-100 ft)
Exceptional
Recommended water activities
Rainfall and humidity levels
Precipitation
Humidity
Maximum humidity of the year. Permanently saturated air. Constant feeling of suffocation. Everything sticks to the skin. Impossible to dry off.
Natural risks in August
Hurricane risk
August is statistically the most dangerous month along with September for hurricanes in the Caribbean. Major hurricanes can form quickly and strike the island. Weather monitoring multiple times daily is mandatory. Travel insurance with hurricane coverage is essential. Evacuation plan required.
Sargassum risk
Sargassum gradually decreases in August. West coast beaches generally remain clean. Cleaning services are active on affected beaches.
Saharan dust
Saharan dust haze starts to decrease in August. Episodes are less frequent and less intense than June-July but remain possible.
Vegetation and landscapes
Dense tropical jungle
August maintains vegetation at its tropical peak. The island resembles a dense, impenetrable tropical forest. Plants grow at stunning speed, fragrances are heady, and nature reclaims everything. Flamboyant trees remain in bloom and frangipani perfumes the air.
Positive points
- Maximum tropical beauty
- Abundant wildlife
- Enchanting fragrances
To note
- - Omnipresent mosquitoes
- - Totally impenetrable vegetation
- - Impassable trails
Visitor numbers, pollution and noise
Tourist attendance
August shares the record for lowest attendance with July. The combination of extreme heat + high hurricane risk discourages absolutely all typical tourists. Only a few adventurers and extreme divers dare to visit. The island is a sleepy Caribbean village.
Positive impact
- - Totally deserted island
- - Absolute minimum prices
- - Pure Caribbean authenticity
- - Zero waiting anywhere
To consider
- - 60% of establishments closed
- - Almost no flights
- - Zero entertainment
- - Minimum services
Road traffic
Completely empty roads. Absolute silence except for birdsong and cicadas.
Construction work
All major construction projects underway. Massive renovations before high season.
Air pollution
Air is generally excellent with reduced Saharan dust episodes compared to July.
Is August a good time to visit St Barts?
NO, except for very specific profiles
August combines the worst: extreme heat, maximum humidity, and the highest hurricane risk of the year. This month is only suitable for passionate divers ready for anything to enjoy exceptional underwater conditions, or extreme adventurers seeking an extraordinary experience at unbeatable prices. Comprehensive travel insurance is absolutely mandatory.
Perfect for
- + Extreme divers
- + Hurricane chasers
- + Ultra-minimum budgets
- + Extreme heat tolerance
Not recommended for everyone else
- - 99% of visitors
- - Families
- - Vulnerable individuals
- - Those seeking comfort
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