Water temperature in Knokke-Heist

This data the coastal Knokke-Heist 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 Knokke-Heist

Water temperature in Knokke-Heist today is 18.4°C. Based on our historical data over a period of ten years, the warmest water in this day in the North Sea near Knokke-Heist was recorded in 2022 and was 20.3°C, and the coldest was recorded in 2011 at 17.6°C. Sea water temperature in Knokke-Heist is expected to drop to 18°C in the next 10 days. September average water temperature in Knokke-Heist is 17.8°C, the minimum temperature is 15.4°C, and the maximum is 21°C.

The swimming season in Knokke-Heist lasts from July to August. During those months, Knokke-Heist water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Knokke-Heist in winter reaches 6.6°C, in spring 9.6°C, in summer the average temperature rises to 18.3°C, and in autumn it is 14.5°C.

Knokke-Heist water temperature now

The sea salinity in Knokke-Heist is 27.17‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Knokke-Heist 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 Knokke-Heist. 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 Knokke-Heist. Data in table shown for 6 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Knokke-Heist

Knokke-Heist weather forecast

Current temperature and weather

Data in a table show Knokke-Heist temperature today (6 September 2025). For more information and forecast for a few days, go to the weather forecast Knokke-Heist.

0-3 h	3-6 h	6-9 h	9-12 h
14.2°C	12.6°C	12.2°C	17.9°C

12-15 h	15-18 h	18-21 h	21-24 h
20°C	20.4°C	18.5°C	14.1°C

Knokke-Heist water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Knokke-Heist. 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 Knokke-Heist 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 Knokke-Heist

The nearest beaches and cities from Knokke-Heist 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
Wenduine	18.5°C	20°C		0.49 m
Blankenberge	18.5°C	20°C		0.49 m
Cadzand	18.7°C	20°C		0.43 m
Groede	18.9°C	19°C		0.37 m
De Haan	18.8°C	19°C		0.56 m
Zoutelande	19°C	19°C		0.37 m
Westkapelle	18.9°C	19°C		0.46 m
Domburg	19°C	19°C		0.46 m
Middelburg	19.1°C	19°C		0.27 m
Breskens	19.1°C	19°C		0.27 m

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Our report for Knokke-Heist 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.