World Resorts USA Block Island Weather

Block Island Sea Temperature in January

Average sea water temperature in January:
+44.1°F
Minimum sea water temperature in January: 49.5°F
Maximum sea water temperature in January: 38.3°F

Daily sea water temperature in January, °F

Show year:
2026
2025
2024

The average sea water temperature in January of 2026 was 40.7°F. The highest and lowest sea temperatures during the month were 42.4°F and 38.3°F.

Monthly sea water temperature in Block Island, °F

Which USA resorts have warmest sea in January?

Place name January 2026 January 2025
Kailua Kona 78.3°F 78.2°F
Honolulu 77.2°F 77.6°F
Hawaii 77.2°F 77.5°F
Maui 77.0°F 76.9°F
Kauai 77.0°F 75.0°F
West Palm Beach 76.6°F 75.5°F
Oahu 76.1°F 76.5°F
Fort Lauderdale 75.9°F 75.1°F
Miami Beach 74.0°F 73.1°F
Key West 72.5°F 70.3°F
Key Largo 71.7°F 71.1°F
Miami 71.2°F 70.7°F
Everglades 70.8°F 68.6°F
South Padre Island 69.5°F 66.7°F
Naples 67.7°F 64.7°F
Cocoa Beach 66.9°F 60.9°F
Sanibel Island 66.8°F 63.7°F
Siesta Key 65.0°F 61.5°F
Sarasota 65.0°F 61.2°F
Orlando 64.8°F 59.8°F

Best time for vacation in Block Island

Sunniest months:
November 16 days
September 14 days
December 14 days
Warmest months:
July 74.4 °F
August 73.5 °F
September 68.8 °F
Warmest sea temp:
August 70.1 °F
July 68.6 °F
September 68.3 °F
Coldest months:
January 36.8 °F
February 37.4 °F
December 42.5 °F
Rainiest months:
October 4 days
January 3 days
March 3 days
Windiest months:
December 16.1 mph
January 16.0 mph
November 15.7 mph

Block Island on a weather map

Block Island
+37°F
E 6 mph
Feels like: +36°F
Precip.: 0%
Places in USA:
Name
°F
+54°F
+72°F
+72°F
+88°F
+84°F
+75°F
+73°F
+68°F
+39°F
+81°F
+68°F
+73°F
+75°F
+77°F
+37°F
24 Hours Forecast
Block Island
Local time: 16:34
February 26, thursday
1800
36°F
SE
4 mph
2100
32°F
S
9 mph
February 27, friday
0000
30°F
S
12 mph
0300
27°F
S
9 mph
0600
28°F
S
7 mph
0900
30°F
S
2 mph
1200
34°F
NE
5 mph
1500
39°F
NE
9 mph
Units of measurement: °C / °F