World Resorts USA Nantucket Weather

Nantucket Sea Temperature in October

Average sea water temperature in October:
+61.7°F
Minimum sea water temperature in October: 68.5°F
Maximum sea water temperature in October: 56.8°F

Daily sea water temperature in October, °F

Show year:
2025
2024
2023

The average sea water temperature in October of 2025 was 61.0°F. The highest and lowest sea temperatures during the month were 67.6°F and 56.8°F.

Monthly sea water temperature in Nantucket, °F

Which USA resorts have warmest sea in October?

Place name October 2025 October 2024
Key West 83.8°F 82.9°F
West Palm Beach 83.5°F 83.3°F
Fort Lauderdale 83.5°F 83.0°F
Miami Beach 83.4°F 83.4°F
Key Largo 83.0°F 83.1°F
Hialeah 82.9°F 83.0°F
Miami 82.7°F 82.9°F
Everglades 82.5°F 82.6°F
Corpus Christi 82.2°F 80.6°F
Marco Island 82.0°F 81.9°F
Naples 81.9°F 81.6°F
Kauai 81.3°F 79.2°F
Cape Coral 81.1°F 81.2°F
Galveston 80.8°F 78.8°F
Honolulu 80.7°F 80.6°F
Hawaii 80.6°F 80.5°F
Siesta Key 80.4°F 80.7°F
Houston 80.4°F 78.8°F
Hilo 80.3°F 79.7°F
Sarasota 80.2°F 80.5°F

Best time for vacation in Nantucket

Sunniest months:
June 13 days
October 13 days
September 13 days
Warmest months:
August 70.9 °F
July 70.6 °F
September 67.1 °F
Warmest sea temp:
August 72.0 °F
July 70.1 °F
September 68.5 °F
Coldest months:
February 36.1 °F
January 36.4 °F
March 40.7 °F
Rainiest months:
October 4 days
January 3 days
December 3 days
Windiest months:
January 19.0 mph
March 19.0 mph
December 18.9 mph

Nantucket on a weather map

Nantucket
+55°F
NE 24 mph
Feels like: +52°F
Precip.: 0%
Places in USA:
Name
°F
+66°F
+79°F
+79°F
+93°F
+72°F
+81°F
+82°F
+75°F
+72°F
+64°F
+70°F
+79°F
+81°F
+77°F
+68°F
24 Hours Forecast
Nantucket
Local time: 21:13
May 17, sunday
0000
55°F
NE
29 mph
0300
55°F
NE
26 mph
0600
55°F
NE
22 mph
0900
55°F
NE
17 mph
1200
55°F
NE
15 mph
1500
57°F
NE
18 mph
1800
59°F
NE
19 mph
2100
59°F
E
16 mph
Units of measurement: °C / °F