World Resorts USA Mustang Island Weather

Mustang Island Sea Temperature in December

Average sea water temperature in December:
+66.2°F
Minimum sea water temperature in December: 73.4°F
Maximum sea water temperature in December: 56.5°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 66.9°F. The highest and lowest sea temperatures during the month were 72.7°F and 63.7°F.

Monthly sea water temperature in Mustang Island, °F

Which USA resorts have warmest sea in December?

Place name December 2025 December 2024
Kailua Kona 79.4°F 78.3°F
West Palm Beach 79.2°F 78.4°F
Fort Lauderdale 78.9°F 77.6°F
Honolulu 78.7°F 78.3°F
Hawaii 78.6°F 78.3°F
Kauai 78.4°F 76.0°F
Maui 78.2°F 77.8°F
Miami Beach 77.8°F 75.9°F
Oahu 77.3°F 77.2°F
Islamorada 77.0°F 73.4°F
Key Largo 76.9°F 73.1°F
Key West 76.4°F 72.6°F
Miami 76.1°F 73.0°F
Everglades 74.2°F 69.7°F
Marco Island 72.1°F 68.0°F
Naples 71.7°F 67.7°F
Cape Coral 71.5°F 67.8°F
South Padre Island 71.4°F 71.9°F
Sanibel Island 71.1°F 67.1°F
Siesta Key 69.5°F 65.6°F

Best time for vacation in Mustang Island

Sunniest months:
October 17 days
August 16 days
July 14 days
Warmest months:
August 89.6 °F
July 88.3 °F
June 87.4 °F
Warmest sea temp:
August 86.4 °F
September 85.3 °F
July 85.0 °F
Coldest months:
January 62.1 °F
February 62.5 °F
December 66.8 °F
Rainiest months:
July 3 days
September 2 days
May 2 days
Windiest months:
April 13.9 mph
May 13.6 mph
June 13.2 mph

Mustang Island on a weather map

Mustang Island
+70°F
NW 9 mph
Feels like: +70°F
Precip.: 0%
Places in USA:
Name
°F
+37°F
+73°F
+73°F
+59°F
+59°F
+70°F
+75°F
+68°F
+36°F
+61°F
+57°F
+66°F
+64°F
+70°F
+39°F
24 Hours Forecast
Mustang Island
Local time: 22:16
December 24, wednesday
0000
70°F
NW
8 mph
0300
70°F
NW
7 mph
0600
68°F
NW
8 mph
0900
70°F
NW
7 mph
1200
72°F
NW
10 mph
1500
72°F
NW
11 mph
1800
70°F
NW
11 mph
2100
70°F
NW
9 mph
Units of measurement: °C / °F