AI-generatedPorto Alegre at a glance
- Best time
- Feb – Dec
- Warmest month
- Jan · 29°
- Warmest sea
- Feb · 26.1°
- Sunshine a year
- 2,160 h
- Rain a year
- 1,521 mm
- Climate
- Subtropical
- Time zone
- UTC−3
- Elevation
- 46 m
Climate in Porto Alegre
Porto Alegre has a subtropical climate with warm summers and mild winters. January is the warmest month with average highs of 29 °C, while July is the coolest at 18 °C. With around 2,160 hours of sunshine a year, Porto Alegre is moderately sunny; January is the sunniest month with 7.7 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: February – December
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 19°
- Midday, 13:00: about 23°
- Afternoon, 16:00: about 23°
- Evening, 20:00: about 19°
- Night, 23:00: about 18°
05:4718:34
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:33–06:19 · evening 18:02–18:48
- Blue hour
- Morning 05:23–05:33 · evening 18:48–18:58
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
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.
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
Sea temperature in Porto Alegre
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 18.7 – 20.7 °C
Swimming season: Nov – Apr
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Porto Alegre ranges from 15.1 °C in July to 26.1 °C in February. It is warm enough for a comfortable swim (20 °C and more) from November to April.
The sea warms up slowly: it is warmest in February, while the air already peaks in January. The sea temperature varies from year to year: in February, eight out of ten years were between 24.8 and 27.4 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 25.9° | 24.9° | 26.8° | pleasant |
| FebruaryFeb | 26.1° | 24.8° | 27.4° | warm |
| MarchMar | 25.3° | 24.4° | 26.3° | pleasant |
| AprilApr | 22.7° | 21.7° | 23.5° | refreshing |
| MayMay | 19.3° | 18.4° | 20.3° | fresh |
| JuneJun | 16.4° | 14.8° | 18.0° | cold |
| JulyJul | 15.1° | 13.7° | 16.4° | cold |
| AugustAug | 15.7° | 14.2° | 17.2° | cold |
| SeptemberSep | 17.3° | 16.1° | 18.3° | fresh |
| OctoberOct | 19.8° | 18.7° | 20.7° | fresh |
| NovemberNov | 22.2° | 21.4° | 23.3° | refreshing |
| DecemberDec | 24.3° | 23.5° | 25.4° | pleasant |
Sunshine hours in Porto Alegre
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.7 of 12.8 hours of daylight in Porto Alegre, 45 % of the day.
Sunshine hours: measured at the weather station 6 km away, averages 1991–2020 (WMO climate normals). Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Porto Alegre
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 10 · very highStay in the shade around midday; SPF 50, clothing, hat and sunglasses.
The sun is strongest in December (UV 11).
Minutes until sunburn in October
- Very fair skin
- about 15 min
- Fair skin
- about 15 min
- Light brown skin
- about 25 min
- Olive skin
- about 30 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Porto Alegre: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Porto Alegre has about 12 rainy days with 161 mm of rain in total.
Wind and clouds in Porto Alegre
How breezy and how cloudy Porto Alegre is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Porto Alegre typically peaks at 19 km/h during the day: Beaufort 3, light breeze.
Breezy months for windsurfing and kiting
The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 63 % of the sky over Porto Alegre: variable cloud, with about 5.7 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Porto Alegre
How often the day gets hot in Porto Alegre (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Porto Alegre has about 2 hot days, with an average daytime high of 24 °C: some hot or muggy days. Single hot or muggy days are possible; a hat and water bottle are enough.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Porto Alegre
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- muggy month (10+ muggy days)
PleasantOctober: nights around 15°. Ideal for sleeping, often with the window open. Muggy on about 8 days (dew point 18 °C or more).
The coolest nights are in July (10°), the warmest in January (21°). Tropical nights of 20 °C and more are the rule from January to March; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) in April and from October to December. It is muggy (dew point 18 °C or more) on about 118 days a year, mostly from November to April.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 61 | 29° | 21° | 25.9° | 7.7 h | 14 | 130 |
| FebruaryFeb | 65 | 29° | 21° | 26.1° | 7.3 h | 12 | 117 |
| MarchMar | 72 | 28° | 20° | 25.3° | 6.7 h | 12 | 113 |
| AprilApr | 78 | 25° | 17° | 22.7° | 5.6 h | 9 | 106 |
| MayMay | 73 | 21° | 13° | 19.3° | 4.6 h | 10 | 117 |
| JuneJun | 72 | 19° | 11° | 16.4° | 4.0 h | 9 | 123 |
| JulyJul | 73 | 18° | 10° | 15.1° | 4.3 h | 9 | 125 |
| AugustAug | 73 | 20° | 11° | 15.7° | 4.8 h | 10 | 117 |
| SeptemberSep | 71 | 21° | 13° | 17.3° | 5.0 h | 11 | 158 |
| OctoberOct | 71 | 24° | 15° | 19.8° | 5.7 h | 12 | 161 |
| NovemberNov | 80 | 26° | 17° | 22.2° | 7.5 h | 11 | 125 |
| DecemberDec | 72 | 28° | 19° | 24.3° | 7.7 h | 12 | 130 |
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
30.03° S, 51.23° W · 46 m · America/Sao_Paulo
Best time to visit Porto Alegre
The best time to visit Porto Alegre is from February to December. For a beach holiday with the sea above 21 °C, go from March to April and from November to December. For sightseeing, day trips and hiking, conditions are most comfortable from March to September and from November to December. Rain is most frequent from January to February and in October; the wettest month is October with 161 mm.
Porto Alegre through the seasons
How the weather changes over the seasons, with averages for each.
Porto Alegre in spring
Sep – Nov
Good
- 21–26 °C by day
- Sea 20 °C
- 6 h of sun a day
- 35 rainy days in all
Porto Alegre in summer
Dec – Feb
Good
- 28–29 °C by day
- Sea 25 °C
- 8 h of sun a day
- 38 rainy days in all
Porto Alegre in autumn
Mar – May
Good
- 21–28 °C by day
- Sea 22 °C
- 6 h of sun a day
- 31 rainy days in all
Porto Alegre in winter
Jun – Aug
Good
- 18–20 °C by day
- Sea 16 °C
- 4 h of sun a day
- 29 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Porto Alegre for you.
Your best months: April, October – November
Based on the climate averages; tap a month to see its details.
Compare two months in Porto Alegre
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
November has the better holiday weather in Porto Alegre: score 80 against 71. In November, days are 2 °C warmer than in October. The sea is 2 °C warmer in November. November has one rainy day fewer. The sun shines 2 hours longer a day in November.
| Month | October | November |
|---|---|---|
| Weather score | 71 | 80better |
| Day high | 24° | 26° |
| Night low | 15° | 17° |
| Sea | 19.8° | 22.2° |
| Sunshine | 5.7 h | 7.5 hbetter |
| Rainy days | 12 | 11better |
| Rainfall | 161 mm | 125 mmbetter |
| Muggy days | 8better | 10 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Mar – Apr, Nov – Dec
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Mar – Sep, Nov – Dec
15–28 °C and not too much rain
Rainy months
Jan – Feb, Oct
12 or more rainy days
Porto Alegre month by month
The typical weather for every month at a glance.
61January29° · Sea 26° · 8 h
In January, Porto Alegre is hot: daytime highs average 29 °C, and even at night it stays warm at around 21 °C. The sea averages 25.9 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 14 rainy days and 130 mm in total. On about 12 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, January is a good month for a holiday in Porto Alegre.
Porto Alegre in January65February29° · Sea 26° · 7 h
In February, Porto Alegre is hot: daytime highs average 29 °C, and even at night it stays warm at around 21 °C. The sea averages 26.1 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 117 mm in total. On about 9 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, February is a good month for a holiday in Porto Alegre.
Porto Alegre in February72March28° · Sea 25° · 7 h
In March, Porto Alegre is hot: daytime highs average 28 °C, and nights cool down to about 20 °C. The sea averages 25.3 °C – pleasant for swimming. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 113 mm in total. On about 7 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is a good month for a holiday in Porto Alegre.
Porto Alegre in March78April25° · Sea 23° · 6 h
In April, Porto Alegre is warm: daytime highs average 25 °C, and nights cool down to about 17 °C. The sea averages 22.7 °C – refreshing for a swim. Expect around 6 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 106 mm in total. All in all, April is a good month for a holiday in Porto Alegre.
Porto Alegre in April73May21° · Sea 19° · 5 h
In May, Porto Alegre is mild: daytime highs average 21 °C, and nights cool down to about 13 °C. The sea averages 19.3 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 117 mm in total. All in all, May is a good month for a holiday in Porto Alegre.
Porto Alegre in May72June19° · Sea 16° · 4 h
In June, Porto Alegre is mild: daytime highs average 19 °C, and nights cool down to about 11 °C. The sea averages 16.4 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 123 mm in total. All in all, June is a good month for a holiday in Porto Alegre.
Porto Alegre in June73July18° · Sea 15° · 4 h
In July, Porto Alegre is mild: daytime highs average 18 °C, and nights cool down to about 10 °C. The sea averages 15.1 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 125 mm in total. All in all, July is a good month for a holiday in Porto Alegre.
Porto Alegre in July73August20° · Sea 16° · 5 h
In August, Porto Alegre is mild: daytime highs average 20 °C, and nights cool down to about 11 °C. The sea averages 15.7 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 117 mm in total. All in all, August is a good month for a holiday in Porto Alegre.
Porto Alegre in August71September21° · Sea 17° · 5 h
In September, Porto Alegre is warm: daytime highs average 21 °C, and nights cool down to about 13 °C. The sea averages 17.3 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 158 mm in total. All in all, September is a good month for a holiday in Porto Alegre.
Porto Alegre in September71October24° · Sea 20° · 6 h
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.
Porto Alegre in October80November26° · Sea 22° · 8 h
In November, Porto Alegre is warm: daytime highs average 26 °C, and nights cool down to about 17 °C. The sea averages 22.2 °C – refreshing for a swim. The sun shines for around 8 hours a day. Rain is frequent, with about 11 rainy days and 125 mm in total. All in all, November is an excellent month for a holiday in Porto Alegre.
Porto Alegre in November72December28° · Sea 24° · 8 h
In December, Porto Alegre is hot: daytime highs average 28 °C, and nights cool down to about 19 °C. The sea averages 24.3 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 12 rainy days and 130 mm in total. On about 9 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is a good month for a holiday in Porto Alegre.
Porto Alegre in DecemberPorto Alegre compared
Put Porto Alegre side by side with another destination.
No destination found
Porto Alegre vs. Florianópolis
In October Porto Alegre has the better holiday weather (score 71 vs. 58). During the day Florianópolis is 1 °C cooler than Porto Alegre. The sea in Florianópolis is 1 °C warmer. Florianópolis gets 2 fewer hours of sunshine a day.
| in October | Porto Alegre | Florianópolis |
|---|---|---|
| Holiday score | 71 | 58 |
| Daytime high | 24° | 23° |
| Sea | 20° | 21° |
| Sunshine | 6 h | 4 h |
| Rainy days | 12 | 16 |
| Best time | Feb – Dec | Dec – Apr |
Through the year
Brazil in October: the best places
In October, Porto Alegre ranks 6 of 19 destinations in this country.
- Natal29°27°90
- 2Fortaleza30°27°79
- 3Salvador27°26°78
- 4Belo Horizonte27°75
- 5João Pessoa29°27°75
- 6Porto AlegreThis page24°20°71
- 7Ipanema District28°22°71
- 8Rio de Janeiro28°22°71
Planning a trip to Porto Alegre
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Porto Alegre in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Porto Alegre has its best school-holiday weather during the Easter holidays (score 76) and its weakest during the Christmas holidays (score 67).
- 76
Easter holidays
Mar – Apr
GoodBest holidays
- 26 °C by day
- Sea 23 °C
- 5.9 h of sun a day
- 10 rainy days a month
Good for: Beach & swimming, Sightseeing & walks
- 73
May half-term
May – Jun
Good
- 20 °C by day
- Sea 19 °C
- 4.5 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 73
Summer holidays
Jul – Aug
Good
- 20 °C by day
- Sea 15 °C
- 4.6 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 71
October half-term
Oct
Good
- 24 °C by day
- Sea 20 °C
- 5.7 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 67
Christmas holidays
Dec – Jan
Good
- 29 °C by day
- Sea 25 °C
- 7.7 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 12 h 55 min
- Distance
- 10,330 km
- Time zone
- UTC−3
- Jet lag
- About 3 days (4 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Porto Alegre
When is the best time to visit Porto Alegre?
The best time to visit Porto Alegre is from February to December. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Porto Alegre?
The sea temperature in Porto Alegre ranges from 15.1 °C in July to 26.1 °C in February. It is warm enough for a comfortable swim (20 °C and more) from November to April.
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.
What is the warmest month in Porto Alegre?
January is the warmest month, with average highs of 29 °C and nights around 21 °C. July is the coolest month at 18 °C.
When does it rain most in Porto Alegre?
Rain is most frequent from January to February and in October; the wettest month is October with 161 mm. The driest month is April with 106 mm.
How many hours of sunshine does Porto Alegre get?
Porto Alegre gets around 2,160 hours of sunshine a year. The sunniest month is January with 7.7 hours a day; in June there are 4.0 hours a day.
What time zone is Porto Alegre in?
Porto Alegre uses the time zone America/Sao_Paulo, at UTC−3 all year.
How long is the flight from London to Porto Alegre?
A nonstop flight from London to Porto Alegre takes about 12 h 55 min, for a straight-line distance of about 10,330 km. Most routes need a change of planes, which adds time.
Which school holidays are best for Porto Alegre?
Porto Alegre has its best school-holiday weather during the Easter holidays (score 76) and its weakest during the Christmas holidays (score 67). Holiday ratings (0–100): Easter holidays 76, May half-term 73, Summer holidays 73, October half-term 71, Christmas holidays 67.
Near Porto Alegre
Other destinations close by.
Places with a climate like Porto Alegre
Destinations whose weather through the year is closest to Porto Alegre's – good alternatives.