Rock Harbor Beach water temp

This data the coastal Rock Harbor Beach 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 Rock Harbor Beach

Water temperature in Rock Harbor Beach today is 56.8°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Rock Harbor Beach was recorded in 2021 and was 61.2°F, and the coldest was recorded in 2010 at 54.1°F. Sea water temperature in Rock Harbor Beach is expected to drop to 55°F in the next 10 days. October average water temperature in Rock Harbor Beach is 58.8°F, the minimum temperature is 52.2°F, and the maximum is 65.5°F.

The swimming season in Rock Harbor Beach lasts from July to August. During those months, Rock Harbor Beach water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Rock Harbor Beach in winter reaches 41.4°F, in spring 45°F, in summer the average temperature rises to 65.8°F, and in autumn it is 58.5°F.

Rock Harbor Beach water temperature now

The ocean salinity in Rock Harbor Beach is 31.18‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Rock Harbor Beach 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 Rock Harbor Beach. 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 Rock Harbor Beach. Data in table shown for October 22, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Rock Harbor Beach

Rock Harbor Beach weather forecast

Current temperature and weather

Data in a table show Rock Harbor Beach temperature today (October 22, 2025). For more information and forecast for a few days, go to the weather forecast Rock Harbor Beach.

0-3 h	3-6 h	6-9 h	9-12 h
53.2°F	57.9°F	59.7°F	60.1°F

12-15 h	15-18 h	18-21 h	21-24 h
61.3°F	63°F	61°F	59.2°F

Rock Harbor Beach water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Rock Harbor Beach. 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 Rock Harbor Beach 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 Rock Harbor Beach

The nearest beaches and cities from Rock Harbor Beach 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
Thumpertown Beach	56.8°F	62.6°F		2' 3"
Campground Beach	56.8°F	62.6°F		2' 3"
Breakwater Beach	56.8°F	62.6°F		2' 3"
Cooks Brook Beach	56.7°F	62.6°F		2' 3"
Brewster	57°F	62.6°F		2' 0"
Marconi Beach	56.8°F	62.6°F		3' 7"
East Dennis	57.2°F	68°F		2' 0"
Corporation Beach	57.2°F	68°F		2' 0"
Harborview Beach	57.2°F	68°F		2' 0"
Wellfleet	56.5°F	62.6°F		2' 6"

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Our report for Rock Harbor Beach 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.