Hot
Average highs reach 32°C, so days can feel very hot.
Weather Guide
Grand Cayman, Cayman Islands Average Monthly Weather
Weather score69Good annual avg
Best months: April, March, February
Across the year, average daytime temperatures are around 31°C, sunshine averages 8h per day, and rainfall totals about 1459mm. Sea temperatures average 28°C across the year.
Annual weather
Annual averages
Temp
31°C
Rain
1459mm
Annual total
Sun
8h
Sea
28°C
Weather score
69
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 176mm, so some wet days are possible.
Bright
Sunshine averages 8.6h per day, so bright days are a strong part of the month.
Warm sea
Sea temperatures average 29°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
July32°C average high
July is one of Grand Cayman's warmest months, with daytime heat above the yearly average.
Warmest monthsMay to October
This stretch sets the upper range for average daytime heat.
Rain
July176mm average rain
July is wetter than Grand Cayman's yearly average, so flexible plans matter more.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July8.6 hours average sun
July 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
July29°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJune to October
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
July62 weather score
July scores below Grand Cayman's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJanuary to April and December
These months have the strongest weather score in the monthly averages.
