Water temperature in Sizewell

This data the coastal Sizewell 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 Sizewell

Water temperature in Sizewell today is 12.6°C. Based on our historical data over a period of ten years, the warmest water in this day in the North Sea near Sizewell was recorded in 2022 and was 14.2°C, and the coldest was recorded in 2012 at 11.4°C. Sea water temperature in Sizewell is expected to drop to 12°C in the next 10 days. November average water temperature in Sizewell is 11.9°C, the minimum temperature is 8.5°C, and the maximum is 15°C.

Throughout the year, the water temperature in Sizewell does not rise above 20°C and therefore is not suitable for comfortable swimming. But on some days of August, the water temperature warms up to 20°C and above. The average water temperature in Sizewell in winter reaches 7.1°C, in spring 8.6°C, in summer the average temperature rises to 17°C, and in autumn it is 14.9°C.

Sizewell water temperature now

The sea salinity in Sizewell is 33.63‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Sizewell 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 Sizewell. 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 Sizewell. Data in table shown for 5 November 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Sizewell

Sizewell weather forecast

Current temperature and weather

Data in a table show Sizewell temperature today (5 November 2025). For more information and forecast for a few days, go to the weather forecast Sizewell.

0-3 h	3-6 h	6-9 h	9-12 h
14°C	13.9°C	14°C	14.2°C

12-15 h	15-18 h	18-21 h	21-24 h
14.1°C	14.6°C	14.6°C	14.2°C

Sizewell water temperature by month

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

The nearest beaches and cities from Sizewell 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
Thorpeness	12.6°C	15°C		0.96 m
Walberswick	12.8°C	15°C		0.84 m
Orford	12.3°C	15°C		0.71 m
Shingle Street	12.1°C	15°C		0.71 m
Kessingland	12.9°C	15°C		1.05 m
Dovercourt	11.8°C	15°C		0.71 m
Mistley	11.4°C	15°C		0.58 m
Manningtree	11.3°C	15°C		0.58 m
Great Yarmouth	12.7°C	15°C		1.02 m
Gorleston-on-Sea	12.7°C	15°C		1.02 m

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Sizewell Beach

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Our report for Sizewell 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.