28.12
sun
sun
Day
81°F
W 18 mph
Precip.
0%
0%
Night
77°F
W 19 mph
Precip.
0%
0%
29.12
mon
mon
Day
79°F
W 14 mph
Precip.
0%
0%
Night
77°F
SW 11 mph
Precip.
0%
0%
30.12
tue
tue
Day
77°F
SW 12 mph
Precip.
0%
0%
Night
77°F
SW 11 mph
Precip.
0%
0%
31.12
wed
wed
Day
79°F
SW 11 mph
Precip.
72%
72%
Night
79°F
SW 14 mph
Precip.
0%
0%
01.01
thu
thu
Day
77°F
NE 15 mph
Precip.
67%
67%
Night
75°F
S 14 mph
Precip.
0%
0%
02.01
fri
fri
Day
77°F
S 17 mph
Precip.
0%
0%
Night
77°F
SW 16 mph
Precip.
53%
53%
03.01
sat
sat
Day
75°F
SW 16 mph
Precip.
84%
84%
Night
75°F
SW 15 mph
Precip.
0%
0%
sea water
temperature
temperature
| Grand Cayman |
monthly
weather
weather
| Grand Cayman |
current
weather
weather
| Grand Cayman |
14 days
forecast
forecast
| Grand Cayman |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 83.2°F. The highest and lowest sea temperatures during the month were 83.7°F and 82.2°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 81.5°F. The highest and lowest sea temperatures during the month were 82.8°F and 80.8°F.
Air temperature in Grand Cayman, °F
Precipitation total in Grand Cayman, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Grand Cayman
Grand Cayman on a weather map
Places in Cayman Islands:
Name
°F
24 Hours Forecast
Grand Cayman
Local time: 17:39
December 28, sunday
1800
79°F
W
19 mph
19 mph
2100
79°F
W
19 mph
19 mph
December 29, monday
0000
77°F
W
19 mph
19 mph
0300
77°F
W
16 mph
16 mph
0600
77°F
W
16 mph
16 mph
0900
79°F
W
14 mph
14 mph
1200
79°F
W
14 mph
14 mph
1500
79°F
SW
12 mph
12 mph
