Canada · coast guide
Understanding the coast of Canada
This guide explains the coast of Canada on the Atlantic, the Pacific, the Arctic; calculations, observations and product limits remain distinct.
Read a local tide
Times and heights depend on the port, datum and station timezone. Canada has Atlantic, Pacific and Arctic coasts as well as the Great Lakes. Canadian Hydrographic Service predictions and observations are station products, while Great Lakes water levels use a distinct regime. Preserve the station name, datum and timestamp instead of treating a national coastline as one tide. A value from another place cannot be carried to a nearby beach. Mareloa preserves the source and timestamp of its data but does not replace the national hydrographic reference.
Tidal range and coast
Tidal range differs among the Bay of Fundy, Pacific inlets, Atlantic estuaries and Arctic coasts. Those contrasts make a national access rule misleading. Begin with the specified station and consult locally published shore, harbour or park information for the place you intend to visit. Tidal range is the vertical difference between low and high water. Bays, depth and coastal shape change it, so one astronomical cycle does not create the same range everywhere. Mareloa creates no national coefficient for Canada and infers no access from one number.
Prediction, model and observation
Prediction, observed level and marine weather are separate evidence. Wind and pressure can alter actual levels, and a station observation reports only its location and time. Keep those labels visible when comparing sources; unavailable data does not become reassurance. An astronomical prediction calculates a periodic component. A model adds assumptions; an observation is a measurement at a station and time. Wind, pressure, waves and geography can change actual level. These categories remain separate and missing evidence never becomes reassuring.
Plan a coast visit
Water-quality notices, shellfish harvesting areas, park access and local restrictions are issued by competent authorities for each place. Review those notices and on-site signs before an activity. This guide links to public sources but neither grants permission nor offers navigation instruction. Use this guide to understand provenance, not to decide an activity. Restrictions, health notices, access and signage are local and can change. Consult the competent authority and on-site information; Mareloa is not a navigation tool.
Reviewed source
This page cites and links to this public reference; it does not reproduce its tables.
Reviewed 2026-09-11.