Porto Alegre weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Good
Best time to visit: February – December
What is the weather like in Porto Alegre in October?
In October, Porto Alegre is warm: daytime highs average 24 °C, and nights cool down to about 15 °C. The sea averages 19.8 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 161 mm in total. All in all, October is a good month for a holiday in Porto Alegre.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 71 | 71 | 80 |
| Day | 21° | 24° | 26° |
| Night | 13° | 15° | 17° |
| Sea | 17° | 20° | 22° |
| Sun | 5 h | 6 h | 8 h |
| Rain days | 11 | 12 | 11 |
More details for October
- Daylight
- 12 h 46 min05:47 – 18:34
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 8 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 63 %on averageAll months
- Hot days
- 2 days30 °C or moreAll months
- Time zone
- UTC−3America/Sao_Paulo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %45 %
- Few rainy daysweight 30 %41 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Porto Alegre in October: quick answers
Is Porto Alegre hot in October?
Warm rather than hot: in October, daytime highs in Porto Alegre average 24 °C and nights cool to about 15 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Porto Alegre in October?
Only if you don't mind cold water: in October the sea averages just 19.8 °C. Comfortable swimming is possible from November to April.
Does it rain much in Porto Alegre in October?
Rain is frequent, with about 12 rainy days and 161 mm in total.
Porto Alegre month by month
The whole year in Porto AlegreAll destinations: BrazilWhere to go in OctoberSea temperature in October
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences