World Resorts USA Seaside Weather

Seaside Sea Temperature in December

Average sea water temperature in December:
+50.7°F
Minimum sea water temperature in December: 53.4°F
Maximum sea water temperature in December: 47.7°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 52.2°F. The highest and lowest sea temperatures during the month were 53.4°F and 50.9°F.

Monthly sea water temperature in Seaside, °F

Which USA resorts have warmest sea in December?

Place name December 2025 December 2024
Kailua Kona 79.2°F 78.3°F
West Palm Beach 79.0°F 78.4°F
Fort Lauderdale 78.7°F 77.6°F
Honolulu 78.6°F 78.3°F
Hawaii 78.5°F 78.3°F
Kauai 78.2°F 76.0°F
Maui 78.0°F 77.8°F
Miami Beach 77.4°F 75.9°F
Oahu 77.1°F 77.2°F
Islamorada 76.4°F 73.4°F
Key Largo 76.3°F 73.1°F
Key West 75.9°F 72.6°F
Miami 75.5°F 73.0°F
Everglades 73.7°F 69.7°F
Marco Island 71.8°F 68.0°F
South Padre Island 71.8°F 71.9°F
Naples 71.5°F 67.7°F
Sanibel Island 70.9°F 67.1°F
Cocoa Beach 69.7°F 66.6°F
Siesta Key 69.3°F 65.6°F

Best time for vacation in Seaside

Sunniest months:
August 13 days
September 12 days
July 11 days
Warmest months:
August 64.9 °F
July 63.1 °F
September 62.8 °F
Warmest sea temp:
August 57.4 °F
July 55.9 °F
September 55.7 °F
Coldest months:
February 45.5 °F
January 46.7 °F
March 47.3 °F
Rainiest months:
January 9 days
November 6 days
December 5 days
Windiest months:
December 10.1 mph
January 9.6 mph
February 9.4 mph

Seaside on a weather map

Seaside
+46°F
NW 5 mph
Feels like: +45°F
Precip.: 0%
Places in USA:
Name
°F
+34°F
+72°F
+72°F
+52°F
+61°F
+66°F
+75°F
+66°F
+30°F
+59°F
+50°F
+59°F
+55°F
+52°F
+36°F
24 Hours Forecast
Seaside
Local time: 19:57
January 12, monday
2100
46°F
NW
5 mph
January 13, tuesday
0000
45°F
NW
3 mph
0300
46°F
W
4 mph
0600
45°F
W
5 mph
0900
41°F
W
5 mph
1200
45°F
W
2 mph
1500
46°F
S
2 mph
1800
45°F
S
2 mph
Units of measurement: °C / °F