Thunder Bay Weather and Lake Superior Marine Outlook

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View from Hillcrest Park
View from Hillcrest Park

Thunder Bay:
Today is shaping up to be a beautiful one in Thunder Bay with mainly sunny skies and a high of 26°C, though it will feel like 31°C with the humidex. Winds are calm today but will shift to the east tomorrow at 20 km/h. Tonight, expect a few clouds and a mild low of 12°C.

The sunny weather continues through Thursday and Friday, with highs of 24°C to 25°C. The weekend brings some clouds, with Saturday reaching a cooler high of 21°C and a 30% chance of showers in the evening. Sunday’s high will be 23°C under mostly cloudy skies​.

Lake Superior Marine Forecast (Western):
Currently, there are no weather warnings in effect for Western Lake Superior. Winds today are expected to remain light at 10 knots, becoming southwest at 15 knots by this evening. Wave heights will remain calm, between 0.5 and 1 meter. Expect clear conditions tonight as winds diminish.

For Thursday, winds will increase slightly to 20 knots but remain calm enough for most boating activities​.

Wardrobe Tip: With the sunshine and mild winds, it’s perfect weather for light summer attire during the day, but you’ll want a light jacket or sweater for the cooler evenings.

Fun Fact: Thunder Bay’s average high temperature for this time of year is 18°C, so today’s warmth is a delightful bonus!

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