Water temperature in Strangford Lough

This data the coastal Strangford Lough 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 Strangford Lough

Water temperature in Strangford Lough today is 15°C. Based on our historical data over a period of ten years, the warmest water in this day in Strangford Lough was recorded in 2021 and was 15.1°C, and the coldest was recorded in 2013 at 13.2°C. Sea water temperature in Strangford Lough is expected to drop to 13.7°C in the next 10 days. September average water temperature in Strangford Lough is 14.2°C, the minimum temperature is 12.8°C, and the maximum is 16.2°C.

Throughout the year, the water temperature in Strangford Lough does not rise above 20°C and therefore is not suitable for comfortable swimming. The average water temperature in Strangford Lough in winter reaches 9°C, in spring 8.7°C, in summer the average temperature rises to 13.1°C, and in autumn it is 13.2°C.

Strangford Lough water temperature now

The sea salinity in Strangford Lough is 33.88‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Strangford Lough 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 Strangford Lough. 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 Strangford Lough. 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 Strangford Lough

Strangford Lough weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
13.3°C	13.7°C	13.4°C	13.3°C

12-15 h	15-18 h	18-21 h	21-24 h
13.8°C	13.8°C	13.5°C	13.5°C

Strangford Lough water temperature by month

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

The nearest beaches and cities from Strangford Lough 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
Millisle	14.7°C	14°C		0.69 m
Greyabbey	14.7°C	14°C		0.69 m
Groomsport	14.7°C	14°C		0.7 m
Belfast	14.2°C	14°C		0.6 m
Holywood	14.2°C	14°C		0.6 m
Crawfordsburn	14.7°C	14°C		0.7 m
Newcastle	14.5°C	14°C		0.83 m
Newtownabbey	14.1°C	15°C		0.6 m
Carrickfergus	14.3°C	14°C		0.6 m
Whitehead	14.6°C	14°C		0.68 m

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Strangford Loch

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Our report for Strangford Lough 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.