Tides and water levels data archive
Services and information
Tide and water level station data
Historical, downloadable tide and water level data for 968 gauges across Canada.
Benchmarks for vertical water levels control
Definition of water level gauge benchmarks.
Great Lakes monthly mean water level
Monthly mean water level in metres referred to chart datum.
Historical Great Lakes water level data
Historical monthly mean water levels for each of the Great Lakes from 1918 to 2021.
Tidal field and format descriptions
Tides and current format (TCF) header definition
The TCF is a format used to exchange tidal predictions, water levels, currents and tidal constituents data.
Tidal highs and lows
Sample record of tidal highs and lows data.
Daily means, monthly means and extremes for tides
Sample record of tidal daily mean levels, monthly mean levels and extremes data.
What we are doing
- Canadian Hydrographic Service Non-Navigational (NONNA) Bathymetric Data
- Chart Index
- Natural Resource Maps
- S-100 services for safe and optimized e-navigation
- Automated Hydrographic Surface Vehicles
- Channel Survey and Sounding Vessels
- The Science of Hydrography
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.