Washington State Ferries is advising travelers to plan ahead for ferry travel during the holiday season.

The schedules for several routes will be adjusted around Christmas and Hanukkah, and all ferry runs will switch over to the winter sailing schedule on Jan. 1.

The Clinton-Mukilteo route — and also the Seattle-Bainbridge Island and Point Defiance-Tahlequah runs — will be on a holiday schedule on Monday, Dec. 26, and customers can check WSF’s fall schedule for details on vessel sailing times.

All other routes will remain on their normal fall schedules throughout the December holidays.

Also during the holiday week and weekend, the schedule for the Coupeville (Keystone)-Port Townsend route will again be adjusted to due to low tides that make it difficult to navigate through Keystone Harbor. To avoid missing the boat, riders on the route should carefully check the schedule for revised sailing times on the days they plan to travel.

Travelers can also check wait times and traffic cameras online for other routes. For terminal, wait time and camera information, visit http://www.wsdot.wa.gov/ferries/vesselwatch/Terminals.aspx.

All routes will switch over to the winter sailing schedule on Sunday, Jan. 1.