World Resorts USA Nantucket Weather

Nantucket Sea Temperature in July

Average sea water temperature in July:
+70.1°F
Minimum sea water temperature in July: 75.6°F
Maximum sea water temperature in July: 63.9°F

Daily sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 68.7°F. The highest and lowest sea temperatures during the month were 72.9°F and 63.9°F.

Monthly sea water temperature in Nantucket, °F

Which USA resorts have warmest sea in July?

Place name July 2025 July 2024
New Orleans 87.4°F 87.1°F
Pass Christian 87.3°F 86.7°F
Bay Saint Louis 87.2°F 86.7°F
Clearwater Beach 87.1°F 88.3°F
St. Petersburg 87.0°F 88.0°F
Sarasota 86.9°F 87.9°F
Sanibel Island 86.9°F 87.7°F
Siesta Key 86.9°F 87.9°F
Pensacola 86.9°F 87.3°F
Tampa 86.8°F 87.4°F
Key West 86.7°F 87.6°F
Orange Beach 86.7°F 86.7°F
Pensacola Beach 86.7°F 87.1°F
Marco Island 86.6°F 87.4°F
Naples 86.6°F 87.2°F
Galveston 86.4°F 86.3°F
Islamorada 86.4°F 87.4°F
Galveston Island 86.4°F 86.4°F
Miami 86.3°F 86.9°F
Panama City Beach 86.3°F 86.8°F

Best time for vacation in Nantucket

Sunniest months:
June 13 days
September 13 days
October 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 36.5 °F
January 36.9 °F
March 40.4 °F
Rainiest months:
January 4 days
October 4 days
December 3 days
Windiest months:
March 19.1 mph
January 19.0 mph
December 18.9 mph

Nantucket on a weather map

Nantucket
+21°F
E 17 mph
Feels like: +10°F
Precip.: 0%
Places in USA:
Name
°F
+28°F
+72°F
+72°F
+48°F
+55°F
+46°F
+59°F
+66°F
+19°F
+61°F
+54°F
+46°F
+48°F
+63°F
+14°F
24 Hours Forecast
Nantucket
Local time: 06:48
January 02, friday
0900
23°F
E
22 mph
1200
27°F
E
19 mph
1500
28°F
E
25 mph
1800
30°F
E
22 mph
2100
28°F
E
21 mph
January 03, saturday
0000
30°F
E
21 mph
0300
30°F
E
20 mph
0600
30°F
E
21 mph
Units of measurement: °C / °F