St-Jean Beach Weather Saint-Barthelemy - Marine & Swimming Conditions
St-Jean beach is one of the most famous in Saint-Barthelemy, renowned for its pristine white sand and crystal clear turquoise waters. Located in close proximity to Gustaf III Airport, it offers the unique and impressive spectacle of planes landing just above the water, creating an unforgettable experience for visitors. With favorable weather conditions throughout the year, numerous water activities (snorkeling, paddle, swimming) and abundant marine life, St-Jean remains an essential destination to discover the charm of Saint-Barth's Caribbean beaches.
Location sur la plage St-Jean
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Sea
Calm
27°C average
Wind
Moderate
Easterly trade winds
Activities
Swimming, Snorkeling, Paddle
Month by Month Conditions
| Month | Conditions | Water Temp. | Waves | Sargassum |
|---|---|---|---|---|
| January | Excellent | 26°C | Calm | None |
| February | Excellent | 26°C | Calm | None |
| March | Very good | 26°C | Calm | Low |
| April | Good | 27°C | Slightly choppy | Moderate |
| May | Average | 27°C | Slightly choppy | High |
| June | Average | 28°C | Moderate | Very high |
| July | Good | 29°C | Moderate | Moderate |
| August | Average | 29°C | Moderate | Low |
| September | Average | 29°C | Choppy | Low |
| October | Good | 28°C | Slightly choppy | None |
| November | Very good | 27°C | Calm | None |
| December | Excellent | 26°C | Calm | None |
Conditions by Month
Optimal conditions from December to April with calm sea and water at 26°C. From May to June, high sargassum risk but excellent conditions for snorkeling with abundant fish. July-October: very warm sea (29°C) but hurricane vigilance required.
Practical Information
- - Partial shade available under palm trees
- - Restaurants and bars nearby
- - Occasional fish for snorkeling
- - Medium sargassum risk (March-June)
- - Airplane landing spectacle