Caye Caulker (Caulker) weather in May
May in Caye Caulker: sweltering, a little rain, with muggy air — fine if you can take 37°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#4 of 12 months in Caye Caulker · #377 of 1413 destinations to visit in May · comfort 86/100 (tier A)
- Days
- 31°C
- Nights
- 27°C
- Wet days
- 15
- Sun
- 11.4 h
- Humidity
- 82%
- Daylight
- 13 h

Traveller notes on Caye Caulker in May
Caye Caulker-forum threads on May weather call it hot and humid, high 20s to low 30s Celsius with humidity high enough to make it feel warmer than the number alone suggests. Precipitation totals are described as low for the month, but posters note a few showers are still likely, usually overnight, early morning, or a brief afternoon burst rather than a washed-out day. May specifically marks the tail end of the low-rain season, the last stretch before the wetter pattern that starts in June takes over. Wind is called a non-issue this month, one less thing to plan around. The record: 31.2C days feeling like a sticky 37C, 26.5C nights, 73mm across 14.5 days, an 82 percent humidity, a 29.4C sea and 11.4 hours of sun.
Other months in Caye Caulker
January is the coolest month here and regulars describe the mechanism rather than the average: from December to March a cold front crosses every ten to fourteen days and lasts a day or two, bringing wind, cloud and sometimes rain - and sometimes no rain at all. What it does bring is wind, which is the part that spoils a snorkelling day. Our row fits: 78mm across 15.4 days is five millimetres a time, and all-day rain is as rare as they say. Days reach 27.4C and feel like 31C at 84 percent humidity; nights fall to 22.4C, or lower behind a front. The sea is 26.7C. The record: 9.4 hours of sun, a 17.3 kph wind and AQI 41.
Caye Caulker-forum threads on July weather describe a real gap between the forecast and lived experience: apps often show rain and storms every single day of the month, but posters consistently report that isn't what actually happens on the ground. The more typical pattern is a single rain event roughly once a week, usually landing in the very early morning hours and clearing up well before 9am, leaving the rest of the day sunny and calm. Some visitors describe entire stretches with barely any rain at all, calling it some of the year's most beautiful weather; others get the more standard hot-and-humid version with an occasional storm. All-day rain is described as genuinely rare rather than typical. Heat and humidity both run high regardless of the rain pattern, the more consistent discomfort across every account. The record: 30.7C days feeling like a punishing 37C, 26.4C nights, a notably high 144mm across 24.6 days, 85 percent humidity, a 30C sea and 11.2 hours of sun.
Caye Caulker-forum threads on November weather are consistent that it's technically inside the rainy season but rarely feels like it day to day: rain doesn't fall every day or all day, arriving instead as a brief shower, often overnight, so mornings tend to stay clear and sunny. Posters call the month variable but mainly sunny overall, and the sea itself stays calm and warm, genuinely comfortable for swimming even with rain technically on the books. The general consensus is not to overthink November's rainy-season label - the actual lived experience most visitors report is closer to a normal tropical month with an occasional wet interruption than a washout. The record: 28.7C days feeling like a sticky 34C, 23.6C nights, a notably high 192mm across 19.6 days, 86 percent humidity, a 28.4C sea and 9.2 hours of sun - wetter by the numbers than the forum's easygoing framing suggests.
April is dry on Caye Caulker - our row's 39.2mm across 8.8 days is the tail of the dry season, with the wet season not starting until June and even then falling mostly overnight - and it is the end of the busy January-to-April stretch. Two things regulars want you to know. April, May and June are the months most likely to bring gusts over 20 mph, against an average nearer 10 to 12. And sargassum, which starts arriving in small irregular amounts in late February, peaks from April through June; how much lands depends almost entirely on the strength and direction of the wind, which is why a north wind in winter blows it back out to sea and the spring pattern does not. The record: 30.3C days that feel like 36C, 25.4C nights, 11.6 hours of sun and a 28C sea.
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Caye Caulker climate normals — May
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Caye Caulker in May
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.
BusyDry season on the reef(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 May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Dry season on the reef
1 Feb – 31 May · usuallyCrowdedThe rain stops, the trades ease off through April and May, and the water over the reef goes glassy. It is the best run of the year for the Blue Hole day boats, which cancel outright in wind.
- 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.
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 May — FAQ
- Is May a good time to visit Caye Caulker?
- May in Caye Caulker: sweltering, a little rain, with muggy air — fine if you can take 37°C afternoons. It ranks #4 of 12 months for Caye Caulker on SeasonMap's comfort score (86/100).
- What is the weather like in Caye Caulker in May?
- In May, Caye Caulker averages a daily high of 31.2°C and a low of 26.5°C, with about 73.1 mm of rain over roughly 14.5 rainy days.
- What is the air quality in Caye Caulker in May?
- Caye Caulker has a mean US Air Quality Index of about 52 in May.
Within 300 km: Placencia's Whale sharks at Gladden Spit around 15 Mar – 15 Jun, and Tulum's Sea turtle nesting on 1 May – 31 Oct.