This data the coastal West Dennis sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Water temperature in West Dennis today is 72°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near West Dennis was recorded in 2018 and was 73.6°F, and the coldest was recorded in 2007 at 65.5°F. Sea water temperature in West Dennis is expected to drop to 68.2°F in the next 10 days. September average water temperature in West Dennis is 67.5°F, the minimum temperature is 61.2°F, and the maximum is 75.6°F.
The swimming season in West Dennis lasts from July to September. During those months, West Dennis water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in West Dennis in winter reaches 40.5°F, in spring 45.5°F, in summer the average temperature rises to 67.8°F, and in autumn it is 59.7°F.
September 5, 2025 |
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today temp |
72°F |
September 4, 2025 |
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yesterday temp |
70.2°F |
The sea salinity in West Dennis is 31.85‰, and the average salinity of the World Ocean is 35‰.
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for West Dennis. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast West Dennis. Data in table shown for September 5, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
1' 3" | 1' 4" | 1' 5" | 1' 7" |
0.38 m | 0.41 m | 0.44 m | 0.48 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
1' 10" | 2' 1" | 2' 4" | 2' 5" |
0.56 m | 0.64 m | 0.71 m | 0.73 m |
Data in a table show West Dennis temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast West Dennis.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
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65.1°F | 65.7°F | 66.7°F | 68.9°F |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
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71.1°F | 72.3°F | 71.2°F | 70.2°F |
You may also be interested in other sections of our site for West Dennis: Sunrise and Sunset, Tides
These figures shows the average, minimum and maximum monthly sea temperature in West Dennis. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in West Dennis on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
Month | Avr | Min | Max | |
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January | 39.7°F | 32.7°F | 46.9°F | cold |
Sea water temperature in West Dennis in January | ||||
February | 37.4°F | 30.7°F | 42.1°F | cold |
Sea water temperature in West Dennis in February | ||||
March | 39.2°F | 32°F | 46.6°F | cold |
Sea water temperature in West Dennis in March | ||||
April | 44.8°F | 36.7°F | 51.8°F | cold |
Sea water temperature in West Dennis in April | ||||
May | 52.7°F | 45.1°F | 63.1°F | cold |
Sea water temperature in West Dennis in May | ||||
June | 61.9°F | 53.4°F | 72.5°F | cold |
Sea water temperature in West Dennis in June | ||||
July | 70.2°F | 61.2°F | 78.6°F | warm |
Sea water temperature in West Dennis in July | ||||
August | 71.6°F | 64°F | 80.1°F | warm |
Sea water temperature in West Dennis in August | ||||
September | 67.5°F | 61.2°F | 75.6°F | cold |
Sea water temperature in West Dennis in September | ||||
October | 60.1°F | 52.9°F | 68.5°F | cold |
Sea water temperature in West Dennis in October | ||||
November | 51.4°F | 43.9°F | 60.6°F | cold |
Sea water temperature in West Dennis in November | ||||
December | 44.4°F | 37.2°F | 50.9°F | cold |
Sea water temperature in West Dennis in December |