Measurements:
°C
°F
Dennis Port
68°F
E 11 mph
Feels like: 68°F
Precip: 7%
World Resorts USA Dennis Port Weather

Dennis Port Sea Water Temperature

Current Sea Water Temperature:
+67.4°F
Maximum Sea Water Temperature in June: 73.6°F
Minimum Sea Water Temperature in June: 55.8°F
Average water temperature in June: 65.3°F

Sea Water Temperature for the Last 10 Days:

June 24 67.4°F June 19 67.4°F
June 23 68.4°F June 18 67.4°F
June 22 68.8°F June 17 67.8°F
June 21 68.6°F June 16 66.4°F
June 20 69.0°F June 15 63.2°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
Chicago +66
Hawaii +80
Honolulu +80
Houston +82
Las Vegas +96
Los Angeles +66
Maui +74
Miami +80
Miami Beach +88
Myrtle Beach +78
New York +70
San Diego +68
San Francisco +58
Sarasota +84
Tampa +84
24 Hours Weather Forecast
Dennis Port
Local time: 00:23
25 jun, thursday
0300 64°F
E
9 mph
0600 66°F
E
7 mph
0900 76°F
E
6 mph
1200 78°F
NE
7 mph
1500 78°F
NE
12 mph
1800 74°F
NE
12 mph
2100 70°F
N
12 mph
26 jun, friday
0000 68°F
N
13 mph