Water temperature in Dartmouth (NS)

This data the coastal Dartmouth sea 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 sea temperature in Dartmouth

Water temperature in Dartmouth today is 17.4°C. Based on our historical data over a period of ten years, the warmest water in this day in Dartmouth was recorded in 2017 and was 17.7°C, and the coldest was recorded in 2019 at 14.2°C. Sea water temperature in Dartmouth is expected to drop to 15.2°C in the next 10 days. September average water temperature in Dartmouth is 16.6°C, the minimum temperature is 13.7°C, and the maximum is 21.3°C.

Throughout the year, the water temperature in Dartmouth does not rise above 20°C and therefore is not suitable for comfortable swimming. But on some days of September, the water temperature warms up to 20°C and above. The average water temperature in Dartmouth in winter reaches 3.3°C, in spring 3.5°C, in summer the average temperature rises to 14.5°C, and in autumn it is 13.3°C.

Dartmouth water temperature now

The sea salinity in Dartmouth is 30.92‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Dartmouth 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 Dartmouth. 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 Dartmouth. Data in table shown for 26 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Dartmouth

Dartmouth weather forecast

Current temperature and weather

Data in a table show Dartmouth temperature today (26 September 2025). For more information and forecast for a few days, go to the weather forecast Dartmouth.

0-3 h	3-6 h	6-9 h	9-12 h
15.9°C	17.3°C	19.1°C	19.4°C

12-15 h	15-18 h	18-21 h	21-24 h
20.1°C	20.8°C	20.5°C	19°C

Dartmouth water temperature by month

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

The nearest beaches and cities from Dartmouth 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
Herring Cove	18.4°C	21°C		1.78 m
Lawrencetown	18.4°C	21°C		1.68 m
Rainbow Haven Beach	18.4°C	21°C		1.68 m
Conrad's Beach	18.4°C	21°C		1.68 m
Cow Bay	18.4°C	21°C		1.68 m
Sambro	18.5°C	20°C		1.78 m
Lawrencetown Beach	18.3°C	20°C		1.68 m
Crystal Crescent Beach	18.5°C	20°C		1.78 m
Tantallon	17.9°C	22°C		0.83 m
Glen Haven	17.9°C	22°C		0.83 m

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Our report for Dartmouth 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.