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Canadian Tides and Water Levels Data Archive
The Canadian Tides and Water Levels Data Archive provides records of tides and water levels across Canada.
About Canadian Tides and Water Levels Data Archive
The Canadian Tides and Water Levels Data Archive provides observed tide and water level records from over a thousand stations across Canada, with the earliest records dating back to 1848. It offers hourly heights, daily and monthly means, monthly instantaneous extremes, and tidal highs and lows for a limited number of years, with station inventory, downloads, Great Lakes and St. Lawrence bulletins, and a database of harmonic constituents.
Coverage averages 6 years per station, with 60 stations recording for over 50 years. Some analog charts stored on microfilm have not been digitized, 15-minute data are not generally available, and some very early records lack exact times or complete extremes.
Key features
- Station inventory with downloadable observed water level data
- Interactive map and list to locate stations
- Observed hourly heights, daily means and monthly instantaneous extremes
- Observed tidal highs and lows for limited years
- Weekly and hourly Great Lakes and St. Lawrence bulletins
- National database of harmonic constituents for tidal stations
Best for: Researchers needing historical tide and water level observations from Canadian stations.
Good for
- Holds observations from over a thousand stations dating back to 1848
- Archived data undergo two levels of quality control with datum adjustments
- Permanent network observations are added on a daily to monthly basis
Watch out for
- Some analog charts on microfilm have not been digitized
- 15-minute data are not quality controlled and not generally available
- Observed tidal highs and lows are available for only a limited number of years
Canadian Tides and Water Levels Data Archive at a glance
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Canadian Tides and Water Levels Data Archive FAQ
How far back do the water level records go?
The earliest station records date back to 1848, with coverage averaging 6 years per station.
Are 15-minute water level readings available?
No. The archive states 15-minute data lack datum corrections, are not quality controlled, and are not made generally available.
How can I request data or additional information?
Requests can be made online by completing the Data Request Form.
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