☆ Saint Barthélemy Weather June 2026

Saint Barthelemy Climate Guide

Climate Overview

Saint Barthelemy has a tropical maritime climate with a drier season from December through April and a wetter season from August through November. Annual rainfall averages around 1,000 mm39 in, making it one of the drier islands in the Lesser Antilles.

February and March are the driest months, each receiving roughly 43 mm1.7 in, while September through November bring the heaviest rains, with October typically the wettest month at around 110 mm4.3 in. Showers tend to be brief and intense, and the island averages approximately 3,000 hours of sunshine per year.

Daytime highs range from 29 °C84 °F in the cooler months to 31 °C88 °F in summer, with overnight lows between 23 °C73 °F and 25 °C77 °F. Persistent northeast trade winds blow throughout the year, moderating humidity and keeping conditions comfortable despite the tropical latitude.

The cooler months from December to April, locally known as the "Lent" season, bring slightly lower humidity and the most pleasant conditions for visitors.

Monthly Climate Averages

Long-term average temperature and rainfall for Saint Barthélemy by month.

Hurricane History

Saint Barthelemy lies in the northern Leeward Islands, one of the most hurricane-prone zones in the eastern Caribbean. Approximately 16 tropical cyclones have passed over or near the island since reliable records began.

Hurricane Donna (1960, Category 4) passed through the northern Leewards with winds of 241 km/h150 mph, causing heavy damage. Hurricane Luis (1995, Category 4) was the most destructive storm in a generation, with eyewall winds estimated at 217 km/h135 mph as it passed near the island on September 5. Luis destroyed coastal restaurants, stripped vegetation, washed away beaches including Flamands, and left the island without power, water, and telephone service for days.

Hurricane Lenny (1999, Category 4 at peak) followed an unusual west-to-east track and struck Saint Barthelemy on November 19 as a Category 1 storm, dumping a record 380 mm15 in of rain and producing waves up to 5 m16 ft that caused severe coastal erosion. Hurricane Gonzalo (2014, Category 1) brought sustained winds of 138 km/h86 mph with gusts to 203 km/h126 mph, flipping an aircraft at Gustaf III Airport and beaching roughly 40 boats.

Hurricane Irma (2017, Category 5) was the most devastating storm in the island's modern history, making landfall on September 6 with sustained winds near 287 km/h178 mph and a recorded gust of 320 km/h199 mph before the anemometer was destroyed. Irma caused catastrophic destruction across the island, with damage estimated at roughly $1.4 billion USD.

Geography & Terrain

Saint Barthelemy is a small volcanic island of just 25 km²10 sq mi, located approximately 30 km19 miles southeast of Saint Martin and 230 km143 miles northwest of Guadeloupe. The island is a French overseas collectivity and has been a popular luxury tourism destination since the mid-20th century.

It is fully encircled by shallow reefs and features a hilly, rugged interior with numerous peaks and valleys. The highest point is Morne de Vitet at 286 m938 ft, located in the eastern part of the island. Other notable hills include Morne Lurin, Morne Rouge, and Morne de Grand Fond.

The capital, Gustavia, sits on a sheltered natural harbour on the western coast. Gustaf III Airport is known for its short runway and steep approach over the hillside.

The hilly terrain creates some variation in local weather patterns. The eastern side of the island tends to be wetter than the western side, as the northeast trade winds push moisture against the higher slopes. However, because the island's maximum elevation is modest, there is no true orographic enhancement comparable to taller volcanic islands in the region.

The relatively low profile also means Saint Barthelemy is fully exposed to hurricane-force winds from all directions, with limited natural shelter. Surrounding islets including Ile Fourchue, Ile Chevreau, and several smaller rocky outcrops dot the nearby waters but provide no meaningful protection from open-ocean swells or storm surge.

Climate normals based on published data from multiple meteorological sources including Gustavia station records. Monthly values are approximate long-term averages.