Porto Alegre weather live forecast

Today's maximum temperature in Porto Alegre is expected to be 25°C. Select a day from the live weather forecast for Porto Alegre, Brazil for more weather parameters.

5-day weather forecast updated at 04:00 on Wednesday 17th September 2025 GMT

More about Porto Alegre

Porto Alegre by month

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

Recommended for Brazil

International Drivers Association: Get driving permit in 8 minutes

  • Order International Driving Permit (IDP) in 8 minutes online
  • Recognised in over 150 countries in Asia, Europe, Africa & more
  • Accepted by rental car agencies worldwide
Go to International Drivers Association deal >>

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

Porto Alegre weather forecast by day

Below are the detailed weather forecasts for Porto Alegre for the next 5 days.

Porto Alegre weather for Wednesday 17th September 2025

Expect sunshine and showers in Porto Alegre, Brazil with a maximum temperature of 25°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected and a light breeze of 7 kph from the east.

  • 25°C maximum temperature25
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 7 kph from the East7
    kph wind from E

Back to top

Porto Alegre weather for Thursday 18th September 2025

Expect scattered clouds in Porto Alegre, Brazil with a maximum temperature of 25°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the east.

  • 25°C maximum temperature25
    °C maximum temperature
  • 16°C minimum temperature16
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Little or no wind of 5 kph from the East5
    kph wind from E

Back to top

Porto Alegre weather for Friday 19th September 2025

Expect isolated thunderstorms in Porto Alegre, Brazil with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and little or no wind of 3 kph from the north-west.

  • 29°C maximum temperature29
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 21% chance of some rain21
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Little or no wind of 3 kph from the North-West3
    kph wind from NW

Back to top

Porto Alegre weather for Saturday 20th September 2025

Expect isolated thunderstorms in Porto Alegre, Brazil with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 10-20 mm of rainfall expected with 83% chance of some rain and little or no wind of 3 kph from the east.

  • 26°C maximum temperature26
    °C maximum temperature
  • 20°C minimum temperature20
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 83% chance of some rain83
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Little or no wind of 3 kph from the East3
    kph wind from E

Back to top

Porto Alegre weather for Sunday 21st September 2025

Expect isolated thunderstorms in Porto Alegre, Brazil with a maximum temperature of 24°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 30-40 mm of rainfall expected with 93% chance of some rain and little or no wind of 5 kph from the north-west.

  • 24°C maximum temperature24
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 93% chance of some rain93
    % chance of some rain
  • 30-40 mm of rainfall expected<40
    mm of rainfall expected
  • 24°C wind chill24
    °C wind chill
  • Little or no wind of 5 kph from the North-West5
    kph wind from NW

Back to top

Avalon Waterways: Top deals on 2026 river cruises

  • Book early & save on 2026 river cruises with Avalon Waterways
  • Filter deals by promotion, month, destination & more
  • Travel between 1st Jan & 31st Dec 2026 (inclusive)
Go to Avalon Waterways deal >>

Expires at 23:59 on Thursday 31st Dec 2026 · View all Avalon Waterways offers

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about Brazil

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^