Ottawa weather live forecast

Today's maximum temperature in Ottawa is expected to be 29°C. Select a day from the live weather forecast for Ottawa, Ontario, Canada for more weather parameters.

5-day weather forecast updated at 04:00 on Wednesday 5th 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 4th August 2026

Expect clear skies in Ottawa, Ontario with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.

  • 29°C maximum temperature29
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Clear skies
    clear skies
  • 14 hours of bright sunshine14
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 13 kph from the South-West13
    kph wind from SW

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Ottawa weather for Wednesday 5th August 2026

Expect clear skies in Ottawa, Ontario with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south.

  • 30°C maximum temperature30
    °C maximum temperature
  • 16°C minimum temperature16
    °C minimum temperature
  • Clear skies
    clear skies
  • 13 hours of bright sunshine13
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 12 kph from the South12
    kph wind from S

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Ottawa weather for Thursday 6th August 2026

Expect broken clouds in Ottawa, Ontario with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-west.

  • 29°C maximum temperature29
    °C maximum temperature
  • 19°C minimum temperature19
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 10 kph from the South-West10
    kph wind from SW

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Ottawa weather for Friday 7th August 2026

Expect isolated thunderstorms in Ottawa, Ontario with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 32% chance of some rain and a light breeze of 8 kph from the south-west.

  • 28°C maximum temperature28
    °C maximum temperature
  • 21°C minimum temperature21
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 32% chance of some rain32
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 8 kph from the South-West8
    kph wind from SW

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Ottawa weather for Saturday 8th August 2026

Expect isolated thunderstorms in Ottawa, Ontario with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 2-5 mm of rainfall expected with 61% chance of some rain and a light breeze of 11 kph from the south-west.

  • 28°C maximum temperature28
    °C maximum temperature
  • 21°C minimum temperature21
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 61% chance of some rain61
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 11 kph from the South-West11
    kph wind from SW

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