St Barths Weather Month by Month: The Honest Guide
Every travel guide tells you St. Barts has 'beautiful weather year-round.' This is technically true and practically misleading. There is a meaningful difference between February's low humidity, dry blue skies, and 82°F perfection and September's 90°F heat, high humidity, and genuine hurricane risk - and a traveler who doesn't understand that difference may arrive in the wrong month for the experience they were imagining.
This guide provides the most honest and complete month-by-month weather breakdown available for St. Barthélemy, using data from the NOAA National Hurricane Center and the Climates to Travel database. No euphemisms. No marketing language. Just what you actually need to know to choose the right month for your stay in our private villas in St Barts.
St. Barts Weather: Complete Month-by-Month Reference
MonthAvg HighAvg LowRainfallHumidityHurricane RiskCrowdsPrice January82°F / 28°C73°F / 23°C~1.2"LowNonePeak★★★★★ February82°F / 28°C72°F / 22°C~1.0"LowestNonePeak★★★★★ March84°F / 29°C73°F / 23°C~1.5"LowNoneHigh (Bucket)★★★★☆ April86°F / 30°C74°F / 23°C~2.0"Low-moderateNoneTapering★★★☆☆ May87°F / 31°C75°F / 24°C~3.5"ModerateVery lowLow★★☆☆☆ June88°F / 31°C76°F / 24°C~3.5"HigherLowLow★★☆☆☆ July89°F / 32°C76°F / 24°C~3.0"HighLowLow★★☆☆☆ August90°F / 32°C77°F / 25°C~4.5"HighModerateLow★☆☆☆☆ September89°F / 32°C76°F / 24°C~5.5"HighestHighestClosed/very low★☆☆☆☆ October88°F / 31°C76°F / 24°C~5.0"HighModerateLow★★☆☆☆ November85°F / 29°C75°F / 24°C~3.5"ModerateLowBuilding★★★☆☆ December83°F / 28°C74°F / 23°C~2.5"LowNonePeak★★★★★
Understanding St. Barts' Two Seasons
The Lent Season (December-April): The Dry Season
Locally called "the Lent" - a name with no religious connotation, simply the island's traditional name for the dry season - this period is characterized by consistent northeast trade winds, low humidity, minimal rainfall, and temperatures that stay comfortably below 87°F (31°C). February and March are statistically the driest months of the year, with rainfall averaging just 1-1.5 inches.
The Lent season delivers what most travelers are imagining when they picture St. Barts: 250 hours of sunshine per month (the island's annual average), calm turquoise seas, and the cooling trade winds that make even the warmest afternoons comfortable. This is also peak season - December through March sees the highest visitor numbers, the most events, the highest prices, and the most complete service offering. Securing a St Barts villa rental for these months often requires planning many months ahead.
The Wintering (May-November): The Wet Season
The "Wintering" is St. Barts' traditional name for its hot, humid season. This is not a monsoon - rainfall typically comes as afternoon showers that pass quickly, leaving the rest of the day sunny. But the cumulative effect of higher humidity, higher temperatures, and increasing rainfall probability makes this period meaningfully different from the Lent season.
Hurricane season officially runs June 1 through November 30 (NOAA). The risk is not uniform across this period: June and July have low actual risk despite being technically in the season. August and September carry meaningful risk, with September 10th statistically the peak danger day for the Caribbean. October's risk decreases. November transitions back toward the dry season.
The catastrophic exception: Hurricane Irma in September 2017 caused significant damage to St. Barts' infrastructure - flooding Gustavia harbour and damaging several hotels. The island rebuilt comprehensively, and many properties (including Le Sereno, which completed a full rebuild) emerged better than before. But Irma serves as a reminder that hurricane risk, while statistically low in any given year, is not zero.
Month-by-Month Breakdown: The Details
January & February: The Gold Standard
If you had to choose two months that represent St. Barts at its absolute meteorological finest, they are January and February. February is statistically the driest month of the year, averaging just 1 inch of rainfall. Temperatures sit in the low 80s°F (28°C). Humidity is at its annual low. The trade winds blow consistently, keeping even the sunniest beaches comfortable. The sea temperature of 79°F (26°C) is perfect for extended swimming without a wetsuit.
The trade-off: this perfection coincides with peak season pricing and crowds. February in St. Barts is expensive, and accommodation availability - especially in our luxury villa collection - may already be committed by September of the previous year for the best properties.
March & April: Still Excellent, Beginning to Change
March maintains the dry season's character while temperatures begin their gradual rise toward the summer pattern. The Bucket Regatta in late March brings the island's biggest superyacht concentration of the year. Rainfall begins to tick upward in April, averaging around 2 inches - still very manageable - while temperatures approach 86°F (30°C). The trade winds continue to moderate the heat.
April represents what many experienced travelers consider the "sweet spot" - excellent weather, reduced crowds from the January peak, and prices 20-30% below December levels. Les Voiles de Saint Barth sailing event adds a festive dimension to mid-April.
May & June: Warm, Green, and Underrated
May is warm but still very pleasant - temperatures average 87°F (31°C), humidity is moderate, and rainfall averages 3-4 inches spread across the month in afternoon showers that rarely last more than an hour. The island is extraordinarily green and lush, the beaches are empty, and the price advantage over peak season is substantial.
June is the edge. Hurricane season begins June 1st (officially), though actual storm risk in June is very low. The humidity becomes more noticeable, and temperatures approach 88°F (31°C). For travelers comfortable with the trade-offs, June offers genuine value. For those who want certainty, May is the better choice.
July & August: Proceed with Awareness
July and August are the warmest, most humid months of the year, with August averaging highs of 90°F (32°C) and rainfall reaching 4.5 inches. The hurricane risk in August is moderate and rising. Some restaurants and properties close in mid-to-late August for annual maintenance. For travelers who tolerate heat well and accept the storm risk, the price advantage is maximally appealing.
September & October: The Only Months to Avoid
September and October are the only months where the risk-reward calculation argues clearly against visiting. September is statistically the highest-risk hurricane month in the entire Caribbean, with the peak danger concentrated around September 10th. Most hotels and many villas close during this period. Those that remain open do so at significant discounts - but the combination of closure-related limitations, genuine hurricane risk, and high humidity makes these months unsuitable for most travelers.
If a hurricane arrives during your stay - even a glancing impact that never directly hits the island - it can disrupt flights out of Sint Maarten, trap visitors, and turn a luxury vacation into a logistical nightmare.
November: The Awakening
November is St. Barts' renaissance month. The hurricane season is technically still active until November 30th, but actual risk drops sharply after mid-October. Properties that closed for the season begin reopening. Menus are refreshed. The island shakes off the low-season quiet and begins preparing for the Lent season ahead.
The Gourmet Festival, held in early November, is one of the island's most prestigious culinary events - drawing Michelin-starred chefs from France for collaborative dinners across the island's restaurants. For food travelers, November is actually a prime month to visit, with the combination of festival programming, more affordable pricing, and improving weather creating a compelling window. Our St Barts concierge service can secure restaurant tables and curate the experience around the festival's calendar.
Frequently Asked Questions
Does St. Barts get hurricanes?
Yes, though direct hits are rare. Hurricane Irma in September 2017 was the most significant in recent memory, causing substantial damage before the island rebuilt comprehensively. The historical record shows direct impacts are infrequent - but the risk in August-October is real enough that most experienced travelers avoid those months. Travel insurance is strongly recommended for any St. Barts visit in June-November.
What is the water temperature in St. Barts?
Sea temperature varies from approximately 79°F (26°C) in February and March to 84°F (29°C) in September and October. It remains above 79°F year-round, making swimming comfortable in all seasons. The warmest swimming months are August-October; the coolest (but still very pleasant) are January-March.
How many sunny days does St. Barts get per year?
St. Barts averages approximately 250 hours of sunshine per month - among the highest of any Caribbean island. Even in the wet season, most rainfall comes as brief afternoon showers that clear quickly, leaving the majority of each day sunny. The driest and sunniest months are February, March, and July.
What should I pack for St. Barts?
Light natural fabrics (linen, cotton) work for all seasons. In the Lent season (December-April), evenings can feel cool enough for a light layer - especially at waterfront restaurants with trade wind exposure. Sun protection is critical year-round; the Caribbean UV index is high even in winter. In the Wintering months (May-November), pack for warmth and brief showers - a light rain layer and quick-dry fabrics are useful.
Is November a good time to visit St. Barts?
Yes, if timed correctly. November after mid-month offers improving weather, the Gourmet Festival (early November), reopening properties, and prices significantly below peak. Avoid early November if hurricane risk is a concern - while the statistical probability is low, the season technically runs through November 30th. Mid-to-late November, as the island awakens for the coming Lent season, offers an increasingly attractive window.
Plan Your Stay
Choosing the right month is the single biggest decision in planning a St. Barts trip. Once that's settled, the rest - selecting a private villa in St Barts, booking restaurants, arranging transfers - becomes far easier. Explore Luxe St Barts luxury villa rentals to start narrowing down which property suits your travel month and style, and reach out to our concierge team to lock in availability before peak demand hits.
