Winter Harbor water temp

This data the coastal Winter Harbor 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 Winter Harbor

Water temperature in Winter Harbor today is 56.5°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Winter Harbor was recorded in 2012 and was 57.6°F, and the coldest was recorded in 2008 at 53.4°F. Sea water temperature in Winter Harbor is expected to drop to 54.9°F in the next 10 days. September average water temperature in Winter Harbor is 56.1°F, the minimum temperature is 52.9°F, and the maximum is 61.9°F.

Throughout the year, the water temperature in Winter Harbor does not rise above 68°F and therefore is not suitable for comfortable swimming. The average water temperature in Winter Harbor in winter reaches 42.1°F, in spring 41°F, in summer the average temperature rises to 54°F, and in autumn it is 53.4°F.

Winter Harbor water temperature now

The ocean salinity in Winter Harbor is 30.16‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Winter Harbor 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 Winter Harbor. 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 Winter Harbor. Data in table shown for September 23, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Winter Harbor

Winter Harbor weather forecast

Current temperature and weather

Data in a table show Winter Harbor temperature today (September 23, 2025). For more information and forecast for a few days, go to the weather forecast Winter Harbor.

0-3 h	3-6 h	6-9 h	9-12 h
53.4°F	52.5°F	52.3°F	57.4°F

12-15 h	15-18 h	18-21 h	21-24 h
60.4°F	65.7°F	63°F	59.9°F

Winter Harbor water temperature by month

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

The nearest beaches and cities from Winter Harbor 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
Sand Beach	56.7°F	66.2°F		2' 6"
Seal Harbor Beach	56.8°F	66.2°F		3' 4"
Southwest Harbor	57.2°F	66.2°F		2' 10"
Islesford	56.5°F	60.8°F		3' 10"
Seawall	56.8°F	59°F		3' 6"
Tremont	57.7°F	66.2°F		2' 4"
Harrington	56.5°F	64.4°F		3' 2"
Ellsworth	58.5°F	59°F		1' 5"
Union River Bay	58.3°F	59°F		2' 2"
Frenchboro	56.3°F	60.8°F		3' 10"

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Our report for Winter Harbor 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.