Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 26°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

Monday
10th Aug
26

12

9

5
Tuesday
11th Aug
25

13

6

4
Wednesday
12th Aug
25

13

6

5
Thursday
13th Aug
24

12

7

4
Friday
14th Aug
24

11

9

6

5-day weather forecast updated at 04:00 on Monday 10th August 2026 GMT

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The 5-day weather forecast for Ontario (Thunder Bay) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Thunder Bay weather forecast by day

Below are the detailed weather forecasts for Thunder Bay for the next 5 days.

Thunder Bay weather for Monday 10th August 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 26°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the west.

26
°C maximum temperature
12
°C minimum temperature
broken clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
26
°C wind chill
11
kph wind from W

Thunder Bay weather for Tuesday 11th August 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

25
°C maximum temperature
13
°C minimum temperature
broken clouds
6
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
25
°C wind chill
9
kph wind from NW

Thunder Bay weather for Wednesday 12th August 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

25
°C maximum temperature
13
°C minimum temperature
broken clouds
6
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
9
kph wind from NW

Thunder Bay weather for Thursday 13th August 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

24
°C maximum temperature
12
°C minimum temperature
broken clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from NW

Thunder Bay weather for Friday 14th August 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 24°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south.

24
°C maximum temperature
11
°C minimum temperature
scattered clouds
9
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from S

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Ontario - quick facts
Flight time^✝	8 hours
Time difference	UK -5 to -6 hours
Language(s)	English, French
Currency	Canadian Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes