World Resorts Cayman Islands Grand Cayman Weather

Grand Cayman Sea Temperature in December

Average sea water temperature in December:
+82.4°F
Minimum sea water temperature in December: 84.7°F
Maximum sea water temperature in December: 80.6°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 83.4°F. The highest and lowest sea temperatures during the month were 83.7°F and 82.8°F.

Monthly sea water temperature in Grand Cayman, °F

Which Cayman Islands resorts have warmest sea in December?

Place name December 2025 December 2024
Little Cayman 83.6°F 82.4°F
Cayman Brac 83.5°F 82.2°F
George Town 83.4°F 82.7°F
Grand Cayman 83.4°F 82.7°F

Best time for vacation in Grand Cayman

Sunniest months:
March 11 days
July 11 days
May 10 days
Warmest months:
August 87.1 °F
July 87.0 °F
September 86.9 °F
Warmest sea temp:
September 86.1 °F
August 85.9 °F
October 85.5 °F
Coldest months:
January 80.1 °F
February 80.5 °F
March 80.9 °F
Rainiest months:
October 8 days
May 5 days
November 5 days
Windiest months:
December 16.9 mph
November 16.1 mph
January 15.7 mph

Grand Cayman on a weather map

Current weather
06:15
Grand Cayman
+81°F
SW 19 mph
Feels like: +88°F
Precip.: 0%
Places in Cayman Islands:
Name
°F
Grand Cayman
+81°F
George Town
+81°F
Cayman Brac
+79°F
Little Cayman
+79°F
24 Hours Forecast
Grand Cayman
Local time: 06:15
December 21, sunday
0900
81°F
SW
19 mph
1200
81°F
SW
19 mph
1500
82°F
SW
19 mph
1800
81°F
SW
19 mph
2100
81°F
SW
19 mph
December 22, monday
0000
81°F
SW
21 mph
0300
81°F
SW
23 mph
0600
81°F
SW
24 mph
Units of measurement: °C / °F