All about the Willem I-sluis: service times, location and contact details. On the water map below do you see this lock complex in its immediate vicinity. On the right on this page you will find the locking times, additional information and the telephone numbers and VHF channels.
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For seasoned water sports enthusiasts it is a simple procedure, but if you are not yet experienced on the water, entering and exiting the lock can be an impressive experience. How does it work, where do you moor, what should you pay attention to?
From 01-01 until 04-01:
If you do not hear a request, call 0900 - 9394
Saturday, between 09:00h and 15:00h
Sundays and public holidays, between 00:00h and 23:59h - No service
Working days, between 09:00h and 16:00h
From 05-01 until 31-03
Saturday, between 09:00h and 15:00h
Sunday, between 00:00h and 23:59h - No service
Working days, between 06:00h and 22:00h
From 01-04 until 04-05
Weekends and holidays, between 09:00h and 21:00h
Working days, between 06:00h and 22:00h
From 05-05 until 28-05
Holidays, monday, Tuesday, Wednesday, Thursday, Friday, between 06:00h and 22:00h
Saturday, Sunday, between 09:00h and 21:00h
From 29-05 until 31-10
Weekends and holidays, between 09:00h and 21:00h
Working days, between 06:00h and 22:00h
From 01-11 until 14-12:
On 24 and 31 December the service ends at 16:00.
Saturday, between 09:00h and 15:00h
Sunday, between 00:00h and 23:59h - No service
Working days, between 06:00h and 22:00h
From 15-12 until 21-12:
If you do not hear a request, call 0900 - 9394
Saturday, between 09:00h and 15:00h
Sunday, between 00:00h and 23:59h - No service
Working days, between 06:00h and 22:00h
From 22-12 until 28-12:
If you do not hear a request, call 0900 - 9394
Weekends and holidays, between 00:00h and 23:59h - No service
Working days, between 09:00h and 16:00h
From 29-12 until 31-12:
If you do not hear a request, call 0900 - 9394
Saturday, between 09:00h and 15:00h
Sunday, between 00:00h and 23:59h - No service
Working days, between 09:00h and 16:00h
Administrator visiting address
Houtplein 33 Haarlem
Phone: 0800-0200600
Data updated: 15 Oktober 2025, 15:01 uur, all data comes directly from Rijkswaterstaat systems.
