World Resorts Cayman Islands Grand Cayman Weather

Grand Cayman sea water temperature

Current sea water temperature:
+85.1°F
Minimum sea water temperature in November: 86.0°F
Maximum sea water temperature in November: 81.0°F
Average sea water temperature in November: 83.9°F

Sea water temperature for the last 10 days:

October 28 85.1°F October 23 85.1°F
October 27 85.3°F October 22 85.5°F
October 26 85.6°F October 21 85.6°F
October 25 85.6°F October 20 85.5°F
October 24 85.6°F October 19 85.5°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:
2026
2025
2024

The average sea water temperature in September of 2026 was 87.4°F. The highest and lowest sea temperatures during the month were 88.3°F and 86.0°F.

Sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 86.7°F. The highest and lowest sea temperatures during the month were 87.3°F and 86.2°F.

Sea water temperature in October, °F

Show year:
2026
2025
2024

The average sea water temperature in October of 2026 was 85.5°F. The highest and lowest sea temperatures during the month were 86.0°F and 84.7°F.

Best time for vacation in Grand Cayman

Sunniest months:
July 10 days
March 10 days
September 10 days
Warmest months:
August 87.0 °F
July 86.8 °F
September 86.8 °F
Warmest sea temp:
September 86.1 °F
August 86.0 °F
October 85.5 °F
Coldest months:
January 80.1 °F
February 80.3 °F
March 80.9 °F
Rainiest months:
October 7 days
May 5 days
November 5 days
Windiest months:
December 16.8 mph
November 16.1 mph
January 15.7 mph

Grand Cayman on a weather map

Grand Cayman
+81°F
NW 13 mph
Feels like: +88°F
Precip.: 72%
Places in Cayman Islands:
Name
°F
+81°F
+81°F
+82°F
+82°F
24 Hours Forecast
Grand Cayman
Local time: 10:05
November 03, tuesday
1200
81°F
NW
14 mph
1500
81°F
NW
11 mph
1800
79°F
W
10 mph
2100
81°F
W
10 mph
November 04, wednesday
0000
81°F
W
14 mph
0300
81°F
W
14 mph
0600
81°F
W
11 mph
0900
81°F
W
8 mph
Units of measurement: °C / °F