There is current an outage for the tides.gc.ca web site. We apologize for any inconvenience.
We’ll be doing maintenance on the website on June 3, 2020, from 8:00 A.M. – 8:30 A.M. (ET). During this period, there may be service interruptions to the tides.gc.ca and the digital data portal websites.
Please note that the CHS tides database can no longer manage the data received from Environment and Climate Change Canada (ECCC) for the following stations: Sainte-Anne-De-Bellevue (#16005) and Pointe-Claire (#15330). We are currently building a new system that will support these stations which will be available later this year.
For immediate access to ECCC tide gauge data, please follow the links below. Be aware that the vertical datum from ECCC (IGLD85) is not the same as from CHS (Chart Datum):
An issue was discovered in the calculations for Holyrood (00925) station 2020 data. Corrections have been applied and the WDS has been updated. If you have acquired data from the WDS service for Holyrood (00925) station prior to Tuesday February 11th 2020, please be advised you must re-download the data starting Dec 14th 2019 and onward through 2020.
Users of the WDS tidal prediction data service: A problem developed with water level prediction data on the WDS service following loading of new 2020 data, which commenced on Nov 10, 2019. If you have acquired data from the WDS service on or prior to Thursday Dec 5th 2019, please be advised you must re-download all tidal predictions starting Dec 14th 2019 and onward through 2020.