Thunder Bay weather live forecast

Today's maximum temperature in Thunder Bay is expected to be 25°C. Select a day from the live weather forecast for Thunder Bay, Ontario, Canada for more weather parameters.

Sunday
9th Aug
25

13

10

6
Monday
10th Aug
25

12

8

5
Tuesday
11th Aug
26

13

7

4
Wednesday
12th Aug
25

12

3

5
Thursday
13th Aug
24

12

7

6

5-day weather forecast updated at 04:00 on Sunday 9th August 2026 GMT

More about Thunder Bay

Thunder Bay by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ontario

Crystal Ski: Top ski deals to Canada

Sale

Save on skiing holidays to Canada in winter 2025/2026
Book early with Crystal Ski for the best deals
Filter by promotional offers, duration, board basis & more

Go to Crystal Ski deal >>

View all Crystal Ski offers

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 Sunday 9th August 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the west.

25
°C maximum temperature
13
°C minimum temperature
broken clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
9
kph wind from W

Thunder Bay weather for Monday 10th August 2026

Expect scattered clouds in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the west.

25
°C maximum temperature
12
°C minimum temperature
scattered clouds
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from W

Thunder Bay weather for Tuesday 11th August 2026

Expect broken clouds in Thunder Bay, Ontario with a maximum temperature of 26°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

26
°C maximum temperature
13
°C minimum temperature
broken clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
11
kph wind from NW

Thunder Bay weather for Wednesday 12th August 2026

Expect mostly cloudy with light rain in Thunder Bay, Ontario with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a light breeze of 8 kph from the north-west.

25
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
5
UV index (Moderate)
55
% chance of some rain
<2
mm of rainfall expected
25
°C wind chill
8
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 6 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

24
°C maximum temperature
12
°C minimum temperature
broken clouds
7
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
24
°C wind chill
11
kph wind from NW

Hurtigruten: Latest offers on worldwide cruises

Sale

Explore latest special offers on Hurtigruten Expeditions
Includes online discount, no single supplement & more
Browse top online deals & destination specific offers

Go to Hurtigruten deal >>

More about Ontario

Be inspired

Get your weekly fix of holiday inspiration from some of the world's best travel writers plus save on your next trip with the latest exclusive offers

We promise not to share your details

Popular travel offers

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