Ottawa weather live forecast

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

Tuesday
18th Aug
26

14

11

6
Wednesday
19th Aug
24

17

4

4
Thursday
20th Aug
23

15

8

5
Friday
21st Aug
25

13

10

6
Saturday
22nd Aug
26

15

2

5

5-day weather forecast updated at 04:00 on Wednesday 19th August 2026 GMT

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

Ottawa weather forecast by day

Below are the detailed weather forecasts for Ottawa for the next 5 days.

Ottawa weather for Tuesday 18th August 2026

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 26°C, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south-west.

26
°C maximum temperature
14
°C minimum temperature
scattered clouds
11
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
26
°C wind chill
9
kph wind from SW

Ottawa weather for Wednesday 19th August 2026

Expect isolated thunderstorms in Ottawa, Ontario with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 70% chance of some rain and a light breeze of 10 kph from the west.

24
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
4
UV index (Moderate)
70
% chance of some rain
<20
mm of rainfall expected
24
°C wind chill
10
kph wind from W

Ottawa weather for Thursday 20th August 2026

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

23
°C maximum temperature
15
°C minimum temperature
scattered clouds
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
9
kph wind from NW

Ottawa weather for Friday 21st August 2026

Expect scattered clouds in Ottawa, 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 7 kph from the north-west.

25
°C maximum temperature
13
°C minimum temperature
scattered clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
25
°C wind chill
7
kph wind from NW

Ottawa weather for Saturday 22nd August 2026

Expect broken clouds in Ottawa, Ontario with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the east.

26
°C maximum temperature
15
°C minimum temperature
broken clouds
2
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
12
kph wind from E

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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