St Barts Weather in July – Climate, Sea, Wind & Travel Conditions
July in Saint Barthelemy represents the heart of tropical summer with temperatures between 25C (77F) and 31C (88F), high humidity, and frequent Saharan dust. The sea reaches 28-29C (82-84F), almost too warm to cool off. The island is nearly deserted with an authentic local atmosphere.
Why visit in July? Rates reach their annual minimum (-60 to 70% on accommodations and villas), allowing access to exceptional properties normally out of reach. The intense heat suits lovers of extreme tropical climate seeking an ultra-authentic experience far from crowds.
Vous souhaitez venir en july à Saint-Barth ?
Découvrez les hébergements disponibles au mois de july.
Recevez une sélection personnalisée d'hébergements, de bons plans voiture et d'activités pour votre séjour en july.
Weather overview in July in St Barts
July represents the heart of tropical summer in Saint Barthelemy. Temperatures reach their maximum (25-31C / 77-88F) with very high humidity. Saharan dust haze is frequent, creating veiled skies and flamboyant sunsets.
It's a month of intense heat where the air becomes thick and heavy. Tropical showers are frequent but short, bringing temporary relief. The sea reaches 28C (82F), almost too warm to cool off. The island is nearly deserted with an authentic local atmosphere and very attractive rates.
Notable weather phenomena in July
Frequent Saharan dust
July experiences the most frequent and intense Saharan dust episodes of the year. The sky takes on a milky tint, visibility decreases, and a fine orange dust settles everywhere. A spectacular phenomenon but can irritate airways.
Maximum tropical heat
Feels-like temperatures regularly exceed 36C (97F) in mid-afternoon. The absence of trade winds makes the heat stifling. Locals describe this period as an "oven." Constant hydration is essential.
Glassy sea
The ocean is exceptionally calm in July, creating ideal conditions for paddleboarding, kayaking, and underwater observation. Turquoise waters are remarkably clear despite the heat.
Temperatures and wind conditions
Air temperatures
Maximum heat with high humidity. Nights offer little relief. Air conditioning is essential for comfortable sleep.
Wind conditions
Trade winds nearly absent. Wind is weak and irregular, bringing no freshness. Stagnant and stifling atmosphere.
Sea temperature and ocean conditions
Water temperature
28-29C (82-84F)
Very warm - like a hot bath
Sea state
Flat as a mirror
Exceptional conditions
Visibility
18-25 meters (60-80 ft)
Excellent for diving
Recommended water activities
Rainfall and humidity levels
Precipitation
Humidity
Maximum humidity making the air saturated and sticky. Permanent feeling of suffocation during the day. Clothes never completely dry.
Natural risks in July
Hurricane risk
July is in the middle of hurricane season. Hurricanes remain relatively rare but tropical depressions and storms are possible. Daily weather monitoring recommended. Travel insurance mandatory.
Sargassum risk
Sargassum decreases in July compared to the May-June peak. West coast beaches (Colombier, Flamands) generally remain spared. Regular cleaning of affected beaches.
Saharan dust
July experiences the most significant Saharan dust episodes. The sky remains veiled for several days in a row. Reduced visibility, spectacular sunsets but possible airway irritation. Avoid intense outdoor exercise.
Vegetation and landscapes
Vegetation explosion
July sees vegetation at its absolute tropical peak. Everything is intensely green, lush, and overflowing with life. Plants grow visibly, fragrances are heady, and the island resembles a tropical jungle. Scarlet flamboyant trees dominate the landscape.
Positive points
- Absolute tropical beauty
- Spectacular blooms everywhere
- Intoxicating fragrances
To note
- - Mosquito invasion
- - Impenetrable vegetation
- - Very wet and slippery trails
Visitor numbers, pollution and noise
Tourist attendance
July is the least busy month of the year along with August. Extreme weather conditions and hurricane risk repel tourists. Only a few adventurers and secondary residents remain. Authentic Caribbean village atmosphere.
Positive impact
- - Completely deserted island
- - Historic rock-bottom prices
- - Ultra-authentic experience
- - Privileged contact with locals
To consider
- - 50% of establishments closed
- - Very few flights
- - No entertainment
- - Ultra-limited services
Road traffic
You'll encounter more goats than cars on the roads. Absolute silence.
Construction work
Peak of major infrastructure projects. Renovations and construction everywhere.
Air pollution
Air is generally pure but frequent Saharan dust episodes significantly reduce air quality for several days.
Is July a good time to visit St Barts?
Reserved for extreme adventurers
July is the most difficult month climatically in St Barts. Stifling heat, maximum humidity, frequent Saharan dust, and hurricane risk. Only recommended for travelers extremely tolerant to heat, passionate divers, and those seeking an off-the-beaten-path experience at rock-bottom prices.
Perfect for
- + Die-hard divers
- + Ultra-tight budgets
- + Seekers of absolute solitude
- + Extreme heat tolerance
Absolutely avoid if
- - Sensitivity to heat
- - Respiratory problems
- - Fear of hurricanes
- - Need for tourist comfort
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