About Sarnia, ON

Sarnia sits where Lake Huron narrows into the St. Clair River, right across from Port Huron, Michigan, connected by the Blue Water Bridge, one of the country's busiest border crossings. Highway 402 links Sarnia to London and the 401 for anyone heading toward Toronto, while short local runs to Point Edward, Petrolia, and St. Clair make up most day-to-day traffic. Refineries along the river give the south end of town its old nickname, Chemical Valley. Chris Hadfield Airport, right in the city, is named after the Canadian astronaut who grew up here.

Where is Sarnia, ON on the map?

Sarnia, ON is in Canada, at 42.999, -82.309 - about 9 km east of Point Edward, ON.

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Forecast for October 19, 2026

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