SeasonMapCaye Caulker (Caulker) weather in September
Belize
September in Caye Caulker: sweltering, soaked, with clean air — fine if you can take 26 rainy days.
#9 of 12 months in Caye Caulker · #829 of 1383 destinations to visit in September · comfort 75/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Caye Caulker in September
Other months in Caye Caulker
Caye Caulker's forum calls March part of the driest, most reliable stretch of the year — regulars note forecasts often show rain that doesn't fully materialise, with actual showers usually brief rather than washing out the day. Wind stays moderate too, generally 10-12 mph, before picking up into stronger gusts from April onward.
Add your own note from Caye Caulker's card on the map.
Caye Caulker climate normals — September
| Daytime high | 31°C / 88°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Feels like (high) | 38°C / 100°F | |
| Sea temperature | 31°C / 88°F | ♨️ bath-warm |
| Rainfall | 197 mm / 7.7 in | ⛈ soaked |
| Rainy days | 26 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 26°C / 78°F | |
| Sunshine | 10.5 h/day | |
| Daylight | 12.2 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Caye Caulker in September
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.
BusySeptember Celebrations, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Caye Caulker'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 weatherCaye Caulker's weather peaks February–April, best around March.
Best weatherFair weatherToughest weather
What's on in Caye Caulker in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Sargassum on the windward side
1 Apr – 30 Sep · usuallySargassum seasonThe east shore and the Split collect weed through the summer and crews rake it at dawn. Swimming here is off a dock ladder in any case, which takes most of the sting out of it.
- Hazard
Hurricane season
1 Jun – 30 NovThe island is barely a metre above the sea and evacuates by water taxi. Belize's serious weeks run from August into October, and the dive shops shut days before a system is due. Source ↗
- Opening
Lobster season opens
15 Jun – 14 FebForaging seasonThe spiny lobster season legally runs from 15 June to 14 February. Outside it, any menu still offering lobster is selling something frozen or illegal, and the boats switch to conch and snapper. Source ↗
- Festival
September Celebrations
10–21 SepMajor festivalCrowdedSt George's Caye Day on the 10th and Independence on the 21st bracket eleven days of flag raisings, carnival parades and boat trips over to Belize City for the bigger version of both. Source ↗
Nearby, and something's on
Within 300 km of Caye Caulker — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Caye Caulker?
Caye Caulker in September — FAQ
- Is September a good time to visit Caye Caulker?
- September in Caye Caulker: sweltering, soaked, with clean air — fine if you can take 26 rainy days. It ranks #9 of 12 months for Caye Caulker on SeasonMap's comfort score (75/100).
- What is the weather like in Caye Caulker in September?
- In September, Caye Caulker averages a daily high of 31.2°C and a low of 26.1°C, with about 196.8 mm of rain over roughly 25.8 rainy days.
- What is the air quality in Caye Caulker in September?
- Caye Caulker has a mean US Air Quality Index of about 31 in September.
Other months in Caye Caulker
Compare Caye Caulker in September
Warmer or cooler than Caye Caulker in September
Similar destinations in Central America — September
Within 300 km: Roatán's Coral spawning nights around 20 Aug – 25 Sep, and Tulum's Sea turtle nesting on 1 May – 31 Oct.