Boothbay Harbor water temp

This data the coastal Boothbay 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 Boothbay Harbor

Water temperature in Boothbay Harbor today is 59.7°F. Based on our historical data over a period of ten years, the warmest water in this day in the Atlantic Ocean near Boothbay Harbor was recorded in 2021 and was 61.9°F, and the coldest was recorded in 2013 at 55.8°F. Sea water temperature in Boothbay Harbor is expected to drop to 56.5°F in the next 10 days. September average water temperature in Boothbay Harbor is 59.7°F, the minimum temperature is 55.4°F, and the maximum is 67.3°F.

Throughout the year, the water temperature in Boothbay Harbor does not rise above 68°F and therefore is not suitable for comfortable swimming. But on some days of August, the water temperature warms up to 68°F and above. The average water temperature in Boothbay Harbor in winter reaches 42.3°F, in spring 42.4°F, in summer the average temperature rises to 59.9°F, and in autumn it is 54.9°F.

Boothbay Harbor water temperature now

The ocean salinity in Boothbay Harbor is 30.29‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Boothbay 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 Boothbay 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 Boothbay Harbor. 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 Boothbay Harbor

Boothbay Harbor weather forecast

Current temperature and weather

Data in a table show Boothbay Harbor temperature today (September 25, 2025). For more information and forecast for a few days, go to the weather forecast Boothbay Harbor.

0-3 h	3-6 h	6-9 h	9-12 h
55.2°F	55.4°F	55.8°F	58.6°F

12-15 h	15-18 h	18-21 h	21-24 h
60.1°F	62.2°F	63.9°F	64.6°F

Boothbay Harbor water temperature by month

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

The nearest beaches and cities from Boothbay 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
Southport	59.5°F	60.8°F		2' 10"
Reid State Park	59.7°F	62.6°F		3' 4"
Georgetown	59.7°F	62.6°F		3' 4"
Phippsburg	60.3°F	62.6°F		3' 0"
Pemaquid Beach	59.4°F	60.8°F		3' 2"
Christmas Cove	59.4°F	60.8°F		3' 2"
Woolwich	60.6°F	62.6°F		3' 0"
North Bath	60.4°F	62.6°F		2' 5"
Popham Beach	59.7°F	62.6°F		3' 11"
Bristol	59.5°F	60.8°F		3' 5"

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Our report for Boothbay 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.