As the last of the winter crowds depart, May ushers in a quieter, greener, and surprisingly rewarding chapter in St Barts. The island transforms — hillsides turn lush, hotel rates plummet, and the Caribbean Sea reaches bathtub-warm temperatures. If you don't mind the occasional afternoon shower, May could be your smartest move yet.

May at a glance

Average temperature: 28-31°C (82-88°F) · Rain days: 10-12 · Sea temperature: 28°C (82°F)

Temperature and Sunshine

May temperatures climb to 28-31°C (82-88°F) during the day, with warm nights hovering around 25-27°C (77-81°F). Expect 7-8 hours of sunshine daily — mornings are typically bright and clear, ideal for hitting the beach early.

Humidity rises noticeably to 75-82%, but the trade winds — though lighter than in winter at 10-15 km/h — still provide welcome relief. You'll feel the shift from dry season, but it's far from oppressive.

Rainfall: What to Really Expect

May brings around 100-130mm of rain spread across 10-12 days — a clear step up from April. But here's the key: showers are short and predictable. They typically arrive in the late afternoon or evening, last 20-40 minutes, and give way to clear skies.

Mornings — Almost always sunny and dry, perfect for beach time

Afternoons — Possible brief showers after 3 PM, then clearing

Evenings — Warm and pleasant, great for outdoor dining

The rain is what gives the island its stunning green transformation. Bougainvillea blooms, cacti flower, and the hills above Gustavia turn a vivid emerald — a side of St Barts most visitors never see.

Sea Conditions and Water Activities

The ocean reaches a delightful 28°C (82°F) in May, making long swims and snorkeling sessions effortless. With lighter winds, the sea is often glassy calm on the western and southern coasts — visibility regularly exceeds 20 meters.

Best for swimming — Flamands, Gouverneur, Saline, Shell Beach

Best for snorkeling — Colombier, Petite Anse, Pain de Sucre

Sea conditions → Colombier beach guide →

Why May Is a Smart Choice

The real appeal of May is the combination of value and experience. With peak season firmly over, you'll find:

30-50% savings on villas and hotels compared to December-March rates
Empty beaches — even popular spots like St Jean and Saline feel private
Easy restaurant bookings — no reservations needed at most places
No hurricane risk — the official season doesn't start until June 1

Good to know

Some restaurants and boutiques close for annual vacation in May. Check ahead — but plenty stay open, and the ones that do often offer a more relaxed, local atmosphere.

What to Pack for May

Quick-dry clothing — Afternoon showers dry fast if your clothes do too
High-SPF reef-safe sunscreen — UV index peaks in May (often 11+)
Insect repellent — Warmer, wetter conditions bring more mosquitoes at dusk
Snorkeling gear — Warm, calm seas make this the best time for underwater exploration

May in St Barts rewards the adventurous traveler — the one who trades peak-season polish for a more authentic, relaxed, and affordable island experience. The weather is warm, the water is perfect, and the island is yours.

Planning your May trip?

Check real-time conditions and the extended forecast before you pack.

View 7-day forecast →