Tides, currents, and water levels

Predicted times and heights of high and low waters, and the hourly water levels for over seven hundred stations in Canada.

Follow us

New water level tools are now online and we want to hear from you! Try out our new:

Send your feedback about our new tools to chsinfo@dfo-mpo.gc.ca.

Services and information

Tidal and water level stations

Interactive map showing observations, predictions, and forecasted water level data.

Tides and water levels data archive

Monthly mean water level, historical tide and water level station data, and water level station benchmarks.


Current Predictions By Station

Predicted times and speeds of weak and strong currents.

Great Lakes – St. Lawrence River Information

Monthly water level bulletins and information on the Great Lakes – St. Lawrence river system.


Water levels by phone

Telephone information system on water levels and tides.

Web services

Web services for accessing official data on navigating modelled surface currents and water levels.


About tides, currents, and water levels

Learn about tides and currents in Canada and the history of tidal measurements.

Contact us

Contact us for more information on tides currents or water levels.


What we are doing


CHS Digital Transformation Initiative

CHS Digital Transformation Initiative

At the Canadian Hydrographic Service, innovation is a guiding principle for the bold digital transformation initiative now underway.

NONNA Version 3.0 Release

NONNA Version 3.0 Release

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.

2024 Tide Tables Available Now

2024 Tide Tables Available Now

Download your 2024 Canadian Tide and Current Tables now to help navigate safely through Canadian waters.