worldweather30°Cnear normal
usually 29°C–30°C
night: exceptionally warm
rain: typical rainfall
wind: lighter than usual
Weather in Cayman Islands - today, tomorrow and 14-day forecast
Right now temperatures across Cayman Islands range from 30° to 30°. Below: today's conditions city by city, a live weather map, the 14-day outlook and month-by-month climate to help you pick the best time to travel.
Country values are the median of forecasts from 1 cities; the range shows local differences. Methodology.
Next days in Cayman Islands
today🌧️
30°💧 1.9 mm
Sun🌧️
30°💧 0.3 mm
Mon🌤️
30°💧 0.2 mm
Tue🌧️
30°💧 0.3 mm
Wed🌧️
30°💧 5.2 mm
Thu🌧️
30°💧 4.4 mm
Fri🌧️
30°💧 0.9 mm
Sat🌤️
30°💧 0.8 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Tuesday 8 Sept in Cayman Islands, the forecast high is 30°C. Typical daytime temperatures at this time of year range from 29°C to 30°C, so it will be warmer than usual. It is warmer than 78% of similar days.
30°Cnear normal
usually 29°C–30°C
night: warmer than usual
rain: exceptionally dry
wind: lighter than usual
30°Cwarmer than usual
usually 29°C–30°C
warmer than 73% of similar days
night: exceptionally warm
rain: exceptionally dry
wind: stronger than usual
30°Cwarmer than usual
usually 29°C–30°C
warmer than 78% of similar days
night: exceptionally warm
rain: exceptionally dry
wind: exceptionally strong
30°Cnear normal
usually 29°C–30°C
night: exceptionally warm
rain: more rain than usual
wind: typical
30°Cnear normal
usually 29°C–30°C
night: exceptionally warm
rain: more rain than usual
wind: typical
30°Cnear normal
usually 29°C–30°C
night: warmer than usual
rain: less rain than usual
wind: exceptionally light
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 30°C by day. The coolest year was 1984 (28°C) and the warmest was 2024 (31°C). The current forecast averages 30°C - higher than in 69% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
14-day forecast - Cayman Islands
Cayman Islands 30 & 45-day weather - long-range outlook
Next 15 days · forecast
29°
around 29° at night · days with rain: 9
Weeks 3-4 · avg for September
32°
around 26° at night · rain chance 42%
Weeks 5-7 · avg for October
31°
around 26° at night · rain chance 41%
The 30 & 45-day outlook for Cayman Islands: the next 15 days are a numerical forecast updated daily - on average 29° by day and 29° at night. Further out we rely on multi-year climate averages: around 32° in September, and about 31° in October. Forecasts beyond two weeks are indicative only.
Day-by-day forecast for Cayman Islands
Saturday5 September 2026
🌧️30°light rain
Sunday6 September 2026
🌧️30°light rain
Monday7 September 2026
🌤️30°a few clouds
Tuesday8 September 2026
🌧️30°light rain
Wednesday9 September 2026
🌧️30°light rain
Thursday10 September 2026
🌧️30°light rain
Friday11 September 2026
🌧️30°light rain
Saturday12 September 2026
🌤️30°a few clouds
Sunday13 September 2026
🌧️30°light rain
Monday14 September 2026
🌧️30°moderate rain
Tuesday15 September 2026
🌧️30°light rain
Wednesday16 September 2026
🌧️29°moderate rain
Thursday17 September 2026
🌧️29°moderate rain
Friday18 September 2026
🌧️29°moderate rain
Saturday19 September 2026
🌧️28°heavy rain
Sea temperature - Cayman Islands
Water today
31°C
Week avg
31°C
Waves today
0.9 m
How's the water?
very warm
16-day sea temperature forecast:
Average sea temperature through the year:
| Beach | Water today | Water week avg | Waves | How's the water? |
|---|---|---|---|---|
| Grand Cayman | 31℃ | 31℃ | 0.7 m | very warm |
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Cayman Islands weather through the year
Cayman Islands weather month by month - when is the best time to go?
Weather in other countries in Caribbean
FAQ - Cayman Islands weather
What is the weather like in Cayman Islands today?
Today it is about 30° during the day and 29° at night, light rain.
How far ahead can I check the forecast for Cayman Islands?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.