Current sea water temperature:
+82.9°F
| Minimum sea water temperature in May: | 86.4°F |
| Maximum sea water temperature in May: | 80.8°F |
| Average sea water temperature in May: | 83.1°F |
| more information | |
14 days
forecast
forecast
| Grand Cayman |
monthly
weather
weather
| Grand Cayman |
Sea water temperature for the last 10 days:
| May 2 | 82.9°F | April 27 | 82.2°F |
| May 1 | 82.8°F | April 26 | 81.9°F |
| April 30 | 82.8°F | April 25 | 81.9°F |
| April 29 | 82.9°F | April 24 | 81.7°F |
| April 28 | 82.6°F | April 23 | 81.7°F |
Monthly sea water temperature, °F
When is the warmest sea in Grand Cayman?
Based on the data about daily sea water temperature for the last three years the warmest sea in Grand Cayman was noticed in September, August and October.
Monthly Sea Temperatures in Grand Cayman, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 87.4°F. The highest and lowest sea temperatures during the month were 87.8°F and 86.9°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 86.9°F. The highest and lowest sea temperatures during the month were 87.4°F and 85.8°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 86.6°F. The highest and lowest sea temperatures during the month were 88.3°F and 85.3°F.
current
weather
weather
| Grand Cayman |
weather in
May
May
| Grand Cayman |
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: 11:22
May 02, saturday
1200
82°F
NW
16 mph
16 mph
1500
82°F
NW
16 mph
16 mph
1800
82°F
NW
14 mph
14 mph
2100
82°F
NW
12 mph
12 mph
May 03, sunday
0000
82°F
NW
15 mph
15 mph
0300
81°F
NW
14 mph
14 mph
0600
81°F
NW
14 mph
14 mph
0900
82°F
W
14 mph
14 mph
