Measurements:
°C
°F
CURRENT WEATHER
09:58
Grand Cayman
88°F
W 14 mph
Feels like: 96°F
Precip: 16%
World Resorts Cayman Islands Grand Cayman Weather

7 Day Weather Forecast

08.19
wed
DAY
88°F
W 11 mph
precip
10%
NIGHT
86°F
SW 8 mph
precip
7%
08.20
thu
DAY
88°F
SW 9 mph
precip
16%
NIGHT
88°F
W 8 mph
precip
8%
08.21
fri
DAY
88°F
W 11 mph
precip
17%
NIGHT
86°F
W 6 mph
precip
77%
08.22
sat
DAY
88°F
W 9 mph
precip
5%
NIGHT
88°F
W 6 mph
precip
7%
08.23
sun
DAY
88°F
SW 9 mph
precip
5%
NIGHT
88°F
SW 9 mph
precip
19%
08.24
mon
DAY
88°F
W 8 mph
precip
19%
NIGHT
88°F
W 4 mph
precip
6%
08.25
tue
DAY
88°F
W 11 mph
precip
15%
NIGHT
88°F
W 6 mph
precip
20%

Grand Cayman Sea Water Temperature in August, °F

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Grand Cayman was 30.3°F. The maximum and minimum values were 30.1°F and 30.5°F respectively.

Grand Cayman on the Weather Map

Best Time to Visit Grand Cayman
The most sunny months:
July 10 days
March 10 days
September 10 days
The most warm months:
August 91.3 °F
September 91.0 °F
July 90.9 °F
Warmest sea temperature:
September 90.1 °F
August 89.9 °F
October 89.5 °F
The most cold months:
January 83.4 °F
February 83.6 °F
March 84.3 °F
The most rainy months:
October 8 days
May 5 days
November 5 days
The most windy months:
December 16 mph
November 16 mph
January 16 mph
more details