West Dennis water temp

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.

Current sea temperature in West Dennis

Water temperature in West Dennis today is 67.6°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 2021 and was 70.3°F, and the coldest was recorded in 2008 at 62.4°F. Sea water temperature in West Dennis is expected to drop to 62.8°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.

West Dennis water temperature now

The sea salinity in West Dennis is 31.85‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in West Dennis for today

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 25, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in West Dennis

West Dennis weather forecast

Current temperature and weather

Data in a table show West Dennis temperature today (September 25, 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
64°F	64.4°F	65.1°F	66.6°F

12-15 h	15-18 h	18-21 h	21-24 h
68.2°F	68.7°F	69.1°F	69.3°F

West Dennis water temperature by month

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

Chart monthly average water temperature in West Dennis

The nearest beaches and cities from West Dennis with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Bass River	67.5°F	68°F		2' 1"
Smugglers Beach	67.5°F	68°F		2' 1"
West Yarmouth	68.4°F	68°F		2' 1"
Sea Gull Beach	68.4°F	68°F		2' 1"
Seagull Beach	68.4°F	68°F		2' 1"
Lewis Bay	68.4°F	68°F		2' 1"
Sea Street Beach	66.4°F	68°F		2' 2"
Colonial Acres Beach	68.4°F	68°F		2' 1"
Hyannis	68.7°F	68°F		2' 0"
Kalmus Beach	68.7°F	68°F		2' 0"

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West Dennis Beach

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Our report for West Dennis is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.