World sea water temperatures

Water temperature in West Dennis in September

Is it warm enough to swim in West Dennis in September? Average water temperature in West Dennis in September is 67.5°F and therefore is not suitable for comfortable swimming. The warmest sea in West Dennis in September is 75.6°F, and the coldest is 61.2°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in West Dennis

Changes water temperature in West Dennis in September 2025, 2024

To get an accurate forecast for the water temperature in West Dennis for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in West Dennis, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
September 170.2°F72.1°F65.8°F75.6°F
September 269.6°F71.6°F66°F74.8°F
September 370.2°F71.2°F65.8°F74.5°F
September 472°F71.4°F66°F74.7°F
September 572.3°F71.4°F65.5°F73.6°F
September 671.8°F69.3°F64.8°F73.8°F
September 771.2°F68.5°F64.8°F74.8°F
September 870.3°F70.5°F64.9°F73.4°F
September 968.9°F69.6°F65.7°F73.6°F
September 1068.4°F69.4°F65.5°F73.2°F
September 1168.5°F69.4°F65.5°F72.3°F
September 1268.9°F70°F65.1°F74.3°F
September 1368.4°F70.9°F64.2°F72.5°F
September 1469.8°F70.9°F64.4°F74.3°F
September 1568.9°F70.9°F63.9°F72.3°F
Day 2025 2024 Min Max
September 1668.4°F70.7°F64.8°F70.9°F
September 1768.4°F69.4°F63.7°F70.9°F
September 1868.5°F68.9°F63.5°F72.1°F
September 1968.9°F68.4°F62.4°F72.5°F
September 2068.9°F66.7°F63.3°F71.1°F
September 2168.2°F65.1°F62.1°F70.5°F
September 2268°F63.9°F61.2°F71.1°F
September 2367.5°F63.7°F61.2°F70.9°F
September 2467.6°F64°F62.2°F71.2°F
September 25 63.7°F62.4°F70.3°F
September 26 63.3°F61.9°F71.1°F
September 27 63.5°F61.3°F70.9°F
September 28 65.3°F61.3°F70.3°F
September 29 64°F61.5°F69.3°F
September 30 64.6°F61.5°F68.5°F
West Dennis water temp chart in September

Average water temperature in West Dennis in September over a decade

20152016201720182019
69.3°F68.4°F65.3°F69.6°F68.4°F
20202021202220232024
68°F71.4°F70.2°F69.4°F68°F

West Dennis sea state in September

Chart comparing the height of waves in West Dennis in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in West Dennis in September

West Dennis water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in September?

Want to know where the water temperature in September is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Bass River67.6°F61.2°F75.6°F
Smugglers Beach67.6°F61.2°F75.6°F
West Yarmouth68°F61.5°F76.6°F
Sea Gull Beach68°F61.5°F76.6°F
Seagull Beach68°F61.5°F76.6°F
Lewis Bay68°F61.5°F76.6°F
Sea Street Beach66.9°F61°F74.3°F
Colonial Acres Beach68°F61.5°F76.6°F
Hyannis68.4°F61.7°F77°F
Kalmus Beach68.4°F61.7°F77°F

Cape Cod photo gallery

  • Cape Cod
  • Sunset at old silver beach
  • Cape Cod
  • Fisherman of New Seabury

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.

Vote for Cape Cod best beach

Current rating: (0 votes cast)

If you know this place (West Dennis) and want to leave your comment or rate it, then fill out the following form.

Your rating for this place:

Does this place have a "Blue Flag" award [1], are there rip currents and what type of beach is it, sand or pebble:

Is the beach a dog-friendly place, child friendly or a nudist beach?


Your comments for this place (water quality, crowds, facilities, activities, lifeguards, service etc.):



[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

Get widget or API for your website

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.

Contact us: admin@seatemperature.info
privacy policy