SeasonMapGustavia (St Barts) weather in August
Saint Barthélemy
August in Gustavia: warm, rainy, with clean air — an excellent time to visit.
#9 of 12 months in Gustavia · #446 of 1383 destinations to visit in August · comfort 85/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Gustavia in August
No notes yet. Open Gustavia on the map to add the first one.
Gustavia climate normals — August
| Daytime high | 28°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 27°C / 81°F | |
| Sea temperature | 30°C / 85°F | ♨️ bath-warm |
| Rainfall | 83 mm / 3.2 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 12.7 h | |
| Wind | 30 km/h / 18 mph | |
| Air quality (US AQI) | 46 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Gustavia in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Gustavia's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherGustavia's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Gustavia in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Atlantic hurricane season
1 Jun – 30 NovMost of the season passes without incident, but this is the island Irma flattened in September 2017 and the rebuild took years. Mid-August to mid-October is the part of the window worth insuring against. Source ↗
Nearby, and something's on
Within 300 km of Gustavia — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Gustavia?
Gustavia in August — FAQ
- Is August a good time to visit Gustavia?
- August in Gustavia: warm, rainy, with clean air — an excellent time to visit. It ranks #9 of 12 months for Gustavia on SeasonMap's comfort score (85/100).
- What is the weather like in Gustavia in August?
- In August, Gustavia averages a daily high of 28.4°C and a low of 27°C, with about 82.5 mm of rain over roughly 13.8 rainy days.
- What is the air quality in Gustavia in August?
- Gustavia has a mean US Air Quality Index of about 46 in August.
Other months in Gustavia
Compare Gustavia in August
Warmer or cooler than Gustavia in August
Similar destinations in Caribbean — August
Within 300 km: Philipsburg's Sea turtle nesting around 1 Apr – 30 Nov, and Pointe-à-Pitre's Tour cycliste de la Guadeloupe on 31 Jul – 9 Aug.