Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
May verdict
Grand Cayman, Cayman Islands in May
Weather score69Good
Good for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 8.4h per day, so bright days are a strong part of the month. Rainfall averages 132mm, so some wet days are possible.
May weather
Monthly averages
Temp
31°C
Rain
132mm
Sun
8.4h
Sea
28°C
Weather score
69
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 132mm, so some wet days are possible.
Bright
Sunshine averages 8.4h per day, so bright days are a strong part of the month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Grand Cayman, Cayman Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May31°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to October
This stretch sets the upper range for average daytime heat.
Rain
May132mm average rain
May sits near Grand Cayman's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May8.4 hours average sun
May sits close to Grand Cayman's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMarch to April and July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May28°C average sea
May is close to Grand Cayman's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJune to October
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
May69 weather score
May sits close to Grand Cayman's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJanuary to April and December
These months have the strongest weather score in the monthly averages.
