Measurements:
°C
°F
Dennis Port
60°F
E 19 mph
Feels like: 56°F
Precip: 2%
World Resorts USA Dennis Port Weather

Dennis Port Sea Water Temperature

Current Sea Water Temperature:
+64.6°F
Maximum Sea Water Temperature in October: 69.8°F
Minimum Sea Water Temperature in October: 56.0°F
Average water temperature in October: 62.6°F

Sea Water Temperature for the Last 10 Days:

October 05 64.6°F September 30 61.6°F
October 04 65.2°F September 29 61.8°F
October 03 62.6°F September 28 61.8°F
October 02 62.0°F September 27 61.8°F
October 01 59.4°F September 26 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: 2026 2025 2024

The average sea surface temperature in August 2026 for Dennis Port was 76.0°F. The maximum and minimum values were 72.6°F and 80.4°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Dennis Port was 74.3°F. The maximum and minimum values were 71.4°F and 76.8°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Dennis Port was 70.1°F. The maximum and minimum values were 61.6°F and 76.0°F respectively.

Best Time to Visit Dennis Port
The most sunny months:
November 15 days
June 14 days
August 13 days
The most warm months:
July 79.1 °F
August 78.3 °F
June 72.0 °F
Warmest sea temperature:
August 75.5 °F
July 74.4 °F
September 70.9 °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
F°
Boston +58
Chicago +62
Hawaii +82
Houston +86
Las Vegas +92
Los Angeles +100
Maui +74
Miami +88
Myrtle Beach +70
New York +62
San Diego +84
San Francisco +66
Santa Monica +94
Sarasota +84
Washington +64
24 Hours Weather Forecast
Dennis Port
Local time: 20:27
05 oct, monday
2100 60°F
E
19 mph
06 oct, tuesday
0000 54°F
SE
15 mph
0300 52°F
E
16 mph
0600 48°F
E
17 mph
0900 48°F
SE
15 mph
1200 54°F
SE
12 mph
1500 60°F
SE
12 mph
1800 58°F
SE
12 mph