System maintenance - November 6, 2026, 21:00 (ET) - November 8, 2026, 24:00 (ET)

System maintenance is planned from Friday, November 6, 21:00 (ET) to Sunday, November 8, 24:00 (ET). During this period, you will not have access to the CHS Tides Website. Access to observation data, prediction data, and to station meta-data will still be available from the following services:

• Tide Mobile App
• IWLS API

These services do not provide access to the annual high and low tide predictions. Please download electronic copies for your specific stations from Tides.gc.ca prior to the outage if you require this data during the outage period. We apologize for the inconvenience.