Dennis water temp

This data the coastal Dennis ocean 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 ocean temperature in Dennis

Water temperature in Dennis today is 69.8°F. Based on our historical data over a period of ten years, the warmest water in this day in the Cape Cod Bay near Dennis was recorded in 2018 and was 72.7°F, and the coldest was recorded in 2017 at 63.7°F. Sea water temperature in Dennis is expected to drop to 66.9°F in the next 10 days. September average water temperature in Dennis is 66.4°F, the minimum temperature is 60.1°F, and the maximum is 73.6°F.

The swimming season in Dennis lasts from July to September. During those months, Dennis water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Dennis in winter reaches 40.6°F, in spring 45.3°F, in summer the average temperature rises to 66.9°F, and in autumn it is 59°F.

Dennis water temperature now

The ocean salinity in Dennis is 31.17‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in 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 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 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)

Surf report in Dennis

Dennis weather forecast

Current temperature and weather

Data in a table show Dennis temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Dennis.

0-3 h	3-6 h	6-9 h	9-12 h
63.9°F	64.4°F	66.6°F	69.1°F

12-15 h	15-18 h	18-21 h	21-24 h
72.1°F	73.4°F	71.4°F	69.6°F

Dennis water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in 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 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 Dennis

The nearest beaches and cities from 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
Harborview Beach	69.8°F	73.4°F		1' 6"
Chapin Beach	69.1°F	73.4°F		1' 5"
Orleans	67.8°F	69.8°F		1' 9"
Skaket Beach	67.8°F	69.8°F		1' 9"
First Encounter Beach	67.8°F	69.8°F		1' 9"
Crosby Landing Beach	67.8°F	69.8°F		1' 9"
Linnell Landing Beach	67.8°F	69.8°F		1' 9"
Ellis Landing beach	67.8°F	69.8°F		1' 9"
Rock Harbor Beach	67.8°F	69.8°F		1' 9"
Thumpertown Beach	67.8°F	69.8°F		1' 9"

If you have interesting photos of this place, you can upload them here. Photos will be available to all users after verification by the moderator.

Get widget or API for your website

Our report for 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.