ISS Passes Over Toronto

Next ISS Pass Over Toronto

Loading a forecast, not a live observation.

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Why two Toronto ISS schedules can differ

The forecast on this page is calculated for PocketWorld's YYZ reference point, whose coordinates are printed with the table. It is not an automatically selected Toronto neighbourhood. A schedule entered for another position can legitimately produce different numbers. Before comparing times, check both observer locations rather than assuming that every page labelled Toronto uses an identical point.

Check the date in UTC as carefully as the hour. A time near midnight can belong to a different local calendar date, so copying just the clock reading into a message loses important context. The table deliberately keeps its time standard visible even if you open it while travelling or using a device configured for another country.

Read the complete prediction before choosing an opportunity

Compare the start, predicted end, visible duration and maximum elevation as separate fields. The end of the predicted pass is not obtained by adding visible duration to its start: those fields answer different questions in the source response. Keep them together when comparing a short opportunity with a longer one.

The brightness column is also a prediction, not a live light measurement. An unknown magnitude is labelled unknown rather than converted into a weak or strong sighting. A high elevation or bright estimate does not mean the sky above your observing position will be clear.

For a Toronto planning check, first verify the YYZ reference, then note the UTC date and initial direction, then inspect local sky conditions independently. Reopen the page near the planned time if the retrieval timestamp is old. The service uses a bounded cache, so repeated refreshes are not a way to obtain a new orbital calculation every second. If a row has expired or the provider is unavailable, the page explains that state without inventing a replacement time.

Observer settings and forecast scope

Reference: YYZ, Toronto, Canada. Latitude 43.6777°, longitude -79.6248°. Observer altitude input: 0 metres. This fixed input is not a measurement of the city's elevation or your location. The request asks N2YO for up to 10 days of visual passes with a minimum visible duration of 60 seconds. Results can be cached for up to one hour; the retrieval timestamp is shown with the table.

All table dates and times are UTC, not automatically converted to your local time zone. Keep the date when converting. The countdown depends on your device clock. A predicted start and end describe a pass window; the separately reported visible duration can be shorter. Maximum elevation is an angle above the horizon. An unknown magnitude is not a prediction of a faint pass.

When the table cannot answer your question

Read the status message before relying on the countdown. A partial list contains only the source entries that passed validation. An unavailable result provides no reliable schedule at all. The page makes one bounded request rather than repeatedly contacting the provider in the background. If loading fails, reloading makes another attempt; the source links below remain usable independently of that request. Closing or leaving the page stops its countdown timer.

Seeing the ISS from Toronto

A forecast is not proof of visibility from your position. Sunlight on the station, a sufficiently dark sky, cloud and your local horizon all matter. The globe's position marker is not a confirmed sighting.

Observation and forecast sources

• Canadian Space Agency: how to see the space station — observation guidance.
• NASA Spot the Station FAQ — visibility and prediction fields.
• N2YO API documentation — forecast data, observer inputs and field definitions.
• Environment and Climate Change Canada: astronomy weather — a separate check of forecast sky conditions, not ISS position.