The water quality of Wassenaarse Slag at Wassenaar

What is the swimming water like? Wassenaarse Slag? On the water map below you'll see the swimming location in its immediate vicinity. On the right of on this page you will find all information about the current weather, at the bottom of the swimming spots in the area.



Open the Water Map for Wassenaar in full window
The bathing water location Wassenaarse Slag is part of the continuous North Sea beach from Scheveningen to Katwijk. The characterizes as a small-scale family beach. The place Wassenaar lies behind the dune area, in the hinterland ter height of this bathing water location. The protected dunes of Meijendel & Berkheide enclose the swimmingwater location. The beach is accessible via the A44-N44 and subsequently local roads.



Swimming spots nearby

1. Katwijk aan zee boulevard noord: water quality is good
2. Katwijk aan zee boulevard zuid: water quality is good
3. Scheveningen zwarte pad: water quality is good
4. Wassenaarse slag: water quality is good


The weather in Wassenaar, now:


Lichte regen

The current weather in Wassenaar is Lichte regen
Wind Force 3 bft | 7.8 Knopen | 14.4 km/h
Wind direction West
Wind arrow
Today: Buien, overdag geleidelijk vooral in het noorden met elders steeds meer zon


Extended weather forecast for Wassenaar (click)



Swim at Wassenaarse Slag

The bathing water quality at Wassenaarse Slag is good
Last check 18-06-2024

E.coli: 30 n/dl (below 1800 is ok)
Intestinal enterococci: 15 n/dl (under 400 is ok)
Monitoring category D
Waste bins
Sandy beach
Salt water
Bicycle shed
WC / Toilets
Information board
Accessible by public transport
Tidal water

Water temperature


Measurement time: 12 juli, 20:10
(more info)
Wassenaarseslag, Wassenaar
Do you have any questions about this swimming location? Contact the administrator:

Gemeente Wassenaar
Phone: 070-5122222


Photo of Wassenaarse SlagFoto: Gemeente Wassenaar
Foto van Wassenaarse SlagPhoto: Gemeente Wassenaar

Information board

The information board at the swimming location Wassenaarse Slag


The water temperature value comes from the nearest official Rijkswaterstaat measuring station and is an approximation for this location. Always take local conditions into account, it is usually colder in deeper water than on the shore!
The water quality measurement is based on the amount of bacteria in nanograms per deciliter (n /dl). In this case it concerns the intestinal bacteria Escherichia coli (E.coli) and intestinal enterococci, which occur in the feces of both animals and humans. A suddenly high value is often related to bird droppings in the water, for example, but can certainly also have other causes. It is unwise to swim in water where these values exceed the standards. The water manager also inspects the bathing water areas for other types of pollution, such as blue-green algae or other toxic algae and general safety features.

More information about this swimming location can be found at

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