Measurements:
°C
°F
Grand Cayman
88°F
W 8 mph
Feels like: 98°F
Precip: 80%
World Resorts Cayman Islands Grand Cayman Weather

Grand Cayman Sea Water Temperature

Current Sea Water Temperature:
+90.0°F
Maximum Sea Water Temperature in May: 90.0°F
Minimum Sea Water Temperature in May: 84.2°F
Average water temperature in May: 86.7°F

Sea Water Temperature for the Last 10 Days:

May 28 90.0°F May 23 89.6°F
May 27 90.0°F May 22 89.8°F
May 26 89.6°F May 21 89.8°F
May 25 89.4°F May 20 88.8°F
May 24 89.4°F May 19 89.0°F

When is the Warmest Sea for Grand Cayman?

According to our data for the last three years for Grand Cayman the highest average sea water temperature was in September, August and October.

Average Water Temperature by Month, °F

Sea Water Temperature in September

Select Year: 2023 2022 2021

The average sea surface temperature in September 2023 for Grand Cayman was 91.1°F. The maximum and minimum values were 90.0°F and 92.0°F respectively.

Sea Water Temperature in August

Select Year: 2023 2022 2021

The average sea surface temperature in August 2023 for Grand Cayman was 91.4°F. The maximum and minimum values were 90.0°F and 92.4°F respectively.

Sea Water Temperature in October

Select Year: 2023 2022 2021

The average sea surface temperature in October 2023 for Grand Cayman was 91.6°F. The maximum and minimum values were 89.8°F and 92.8°F respectively.

Best Time to Visit Grand Cayman
The most sunny months:
July 11 days
September 10 days
March 10 days
The most warm months:
August 91.4 °F
July 91.4 °F
September 91.0 °F
Warmest sea temperature:
September 89.9 °F
August 89.7 °F
October 89.4 °F
The most cold months:
January 83.5 °F
February 83.8 °F
March 84.2 °F
The most rainy months:
October 9 days
November 6 days
August 5 days
The most windy months:
December 16 mph
November 16 mph
January 16 mph

Grand Cayman on the Weather Map

Cayman Islands Resorts:
NAME
Cayman Brac +88
George Town +88
Grand Cayman +88
Little Cayman +88
24 Hours Weather Forecast
Grand Cayman
Local time: 19:45
28 may, tuesday
2100 88°F
W
8 mph
29 may, wednesday
0000 88°F
NW
12 mph
0300 88°F
W
6 mph
0600 88°F
W
3 mph
0900 88°F
W
4 mph
1200 88°F
W
4 mph
1500 88°F
SW
7 mph
1800 88°F
SW
7 mph