About tides, currents, and water levels
Services and information
Tides and currents in Canada
About tides and currents, including their causes and how we use their data.
Notices and important messages
Notices on digital services and water level gauges.
Definitions
List of tidal terms and expressions, and acronym meanings.
Vertical datum chart references
About the vertical datum reference on navigational charts.
Tidal phenomena
Tides and tidal streams, shallow water effects and non-tidal influences.
History of tidal measurements
Background on tidal, current and water level surveying.
What we are doing
Features
CHS Digital Transformation Initiative
At the Canadian Hydrographic Service, innovation is a guiding principle for the bold digital transformation initiative now underway.
Client suggested enhancements have been implemented to the CHS NONNA Data Portal including migration to chart datum and enhanced tools for selecting and downloading large geographic areas.
2023 Tide Tables Available Now
Download your 2023 Canadian Tide and Current Tables now to help navigate safely through Canadian waters.