The Hop-on Hop-off tram runs every 30 minutes from 10:15. The last tour from the city centre departs at 16:45. From Scheveningen the last tram back to the city centre leaves at 17:11.
On some days there may be some busyness in the Tourist Tram between 10:00 and 12:00 in the morning.
Download a PDF of the timetable.