Thunder Bay Weather & Western Lake Superior Marine Forecast

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Weather Update - Leaves in Fall

Thunder Bay – Weather – Current Conditions: In Thunder Bay, skies are mostly cloudy, with temperatures around 12°C. Winds are blowing from the northwest at 8 km/h, and the humidity stands at 69%. The barometric pressure is at 101.4 kPa and rising, indicating stable weather on the horizon.

Forecast for Thunder Bay:

  • Tonight (Sept 21): Expect mostly cloudy skies with a low of 7°C. Winds will pick up to 20 km/h from the northwest by midnight, possibly bringing in a few scattered showers.
  • Sunday (Sept 22): The weather cools down slightly, with a high of 15°C and a continued chance of light showers, particularly in the morning.
  • Monday (Sept 23): Expect sunnier conditions with a high of 17°C, a great day to enjoy the outdoors as the week starts on a brighter note.

Marine Forecast for Western Lake Superior:

A strong wind warning is in effect for today and tomorrow, so mariners should proceed with caution. Winds will shift throughout the day, starting as light but becoming southeast at 15 to 20 knots this evening, then turning northwest overnight with gusts reaching 20 knots. Waves will build from 0.5 meters tonight to 1.5 meters by Sunday morning, calming down later in the day.

Expect scattered showers tonight, with the risk of thunderstorms and some patchy fog dissipating by the morning

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