Measurements:
°C
°F
Dennis Port
72°F
NE 14 mph
Feels like: 72°F
Precip: 1%
World Resorts USA Dennis Port Weather

Dennis Port Sea Water Temperature

Current Sea Water Temperature:
+62.4°F
Maximum Sea Water Temperature in June: 73.6°F
Minimum Sea Water Temperature in June: 55.8°F
Average water temperature in June: 65.4°F

Sea Water Temperature for the Last 10 Days:

June 04 62.4°F May 29 59.8°F
June 03 60.6°F May 28 58.2°F
June 01 58.6°F May 27 57.8°F
May 31 57.6°F May 26 58.0°F
May 30 60.8°F May 25 56.8°F

When is the Warmest Sea for Dennis Port?

According to our data for the last three years for Dennis Port the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Dennis Port was 73.8°F. The maximum and minimum values were 70.6°F and 77.2°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Dennis Port was 72.6°F. The maximum and minimum values were 67.4°F and 76.2°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Dennis Port was 70.5°F. The maximum and minimum values were 68.4°F and 73.6°F respectively.

Best Time to Visit Dennis Port
The most sunny months:
November 15 days
June 13 days
September 13 days
The most warm months:
July 78.5 °F
August 77.4 °F
September 71.5 °F
Warmest sea temperature:
August 75.5 °F
July 74.4 °F
September 71.1 °F
The most cold months:
January 34.7 °F
February 35.0 °F
December 40.7 °F
The most rainy months:
October 3 days
January 2 days
April 2 days
The most windy months:
January 14 mph
December 14 mph
March 14 mph

Dennis Port on the Weather Map

USA Resorts:
NAME
Boston +90
Chicago +76
Hawaii +78
Honolulu +78
Houston +86
Las Vegas +92
Los Angeles +70
Maui +70
Miami +82
Miami Beach +84
New York +94
San Diego +64
San Francisco +60
Sarasota +94
Tampa +92
24 Hours Weather Forecast
Dennis Port
Local time: 12:54
04 jun, thursday
1500 70°F
NE
17 mph
1800 66°F
NE
16 mph
2100 62°F
NE
16 mph
05 jun, friday
0000 62°F
NE
16 mph
0300 60°F
NE
14 mph
0600 60°F
E
11 mph
0900 66°F
E
9 mph
1200 70°F
E
6 mph