Swimming in Belgium in september 2025 Sea temperature by city in september
Do you want to go to the beach in Belgium in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in Belgium by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Belgium in september 2025
Here, find the average sea temperature in Belgium in september in several coastal cities.
65°F
min: 63°F / max: 68°F
65°F
min: 63°F / max: 67°F
Bredene-aan-Zee
65°F
min: 63°F / max: 67°F
De Haan
65°F
min: 63°F / max: 67°F
65°F
min: 63°F / max: 68°F
65°F
min: 63°F / max: 68°F
Oostduinkerke-Bad
65°F
min: 63°F / max: 68°F
65°F
min: 63°F / max: 68°F
Zwin
65°F
min: 63°F / max: 68°F
Blankenberge
65°F
min: 63°F / max: 68°F
Koksijde
65°F
min: 63°F / max: 68°F
Knokke-Heist
65°F
min: 63°F / max: 67°F
Middelkerke
65°F
min: 63°F / max: 67°F
Where should you go swimming in Belgium in the month of september?
Swimming in Belgium in september is cool
In september in Belgium swimming conditions are generally the same everywhere.
Swimming in september in Brugge, Ostend, Bredene-aan-Zee, De Haan, De Panne, Nieuwpoort, Oostduinkerke-Bad, Westende-Bad, Zwin, Blankenberge, Koksijde, Knokke-Heist and Middelkerke is possible but the sea is generally cool. So though the sea temperature may sometimes reach 68°F, it can also go as low as 63°F. Note that the average is 65°F.
Where to go swimming in Belgium in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Brugge
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 3.1in | ||
| Number of days of precipitation | 6 jour(s) (18%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in Brugge in september
Ostend
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 67°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 2.6in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in Ostend in september
Bredene-aan-Zee
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 67°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 2.6in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
De Haan
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 67°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 67°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 2.6in | ||
| Number of days of precipitation | 4 jour(s) (15%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
De Panne
| September | |||
| Average sea temperature | 65°F | ||
| Minimum sea temperature | 63°F | ||
| Maximum sea temperature | 68°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 2.7in | ||
| Number of days of precipitation | 4 jour(s) (14%) | ||
| Cloud cover | 39% | ||
| Our opinion | cool swimming |
More information on swimming in De Panne in september
List of coastal cities in Belgium
| Brugge in september | cool swimming |
| Ostend in september | cool swimming |
| Bredene-aan-Zee in september | cool swimming |
| De Haan in september | cool swimming |
| De Panne in september | cool swimming |
| Nieuwpoort in september | cool swimming |
| Oostduinkerke-Bad in september | cool swimming |
| Westende-Bad in september | cool swimming |
| Zwin in september | cool swimming |
| Blankenberge in september | cool swimming |
| Koksijde in september | cool swimming |
| Knokke-Heist in september | cool swimming |
| Middelkerke in september | cool swimming |