Watersportvereniging Jan van Ketel is a marina and water-sports club situated in Schagen on the Kanaal Schagen-Kolhorn, set within the open, green polder landscape of Noord-Holland.

The harbour accommodates around 65 permanent berths and 40 visitor berths, and serves as a practical access point to nearby waterways including the Amstelmeer and the Kanaal Alkmaar-Kolhorn.

Onboard facilities include electricity and water points, showers, toilets, chemical-toilet drainage, Wi-Fi, and a washing machine.

The historic town centre of Schagen is easily reached on foot or by bike from the marina, and the picturesque village of Kolhorn lies roughly 9 km to the east by water.

The harbour also makes a convenient base for cycling routes along the region's historic dikes and polders.