CHS Tide Interpolation (API-Only)

Enter the station ID, date, and time, then click "Fetch & Interpolate." We’ll fetch data from the Canadian Hydrographic Service (IWLS) for that day, find the points surrounding your desired time, and do a simple linear interpolation.

Station ID: Date (YYYY-MM-DD): Time (HH:MM, 24-hour): Fetch & Interpolate

Note: This example does a straightforward linear interpolation between the preceding and succeeding data points returned by the CHS IWLS API. For most day-to-day tide predictions, this is accurate enough, given the API data often includes readings at 6-, 15-, or 60-minute intervals.