World Resorts Brazil Porto Alegre Weather

Porto Alegre 7 Days Forecast

15.09
tue
Day
64°F
E 4 mph
Precip.
5%
Night
55°F
SW 1 mph
Precip.
19%
16.09
wed
Day
57°F
NW 6 mph
Precip.
17%
Night
52°F
W 6 mph
Precip.
7%
17.09
thu
Day
70°F
W 3 mph
Precip.
5%
Night
59°F
NW 2 mph
Precip.
13%
18.09
fri
Day
73°F
NW 4 mph
Precip.
11%
Night
63°F
W 6 mph
Precip.
30%
19.09
sat
Day
75°F
W 9 mph
Precip.
15%
Night
64°F
W 9 mph
Precip.
35%
20.09
sun
Day
64°F
W 4 mph
Precip.
64%
Night
66°F
SW 2 mph
Precip.
39%
21.09
mon
Day
75°F
E 6 mph
Precip.
17%
Night
64°F
NW 6 mph
Precip.
12%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 62.9°F. The highest and lowest sea temperatures during the month were 64.2°F and 61.7°F.

Air temperature in Porto Alegre, °F

Precipitation total in Porto Alegre, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Porto Alegre

Sunniest months:
February 15 days
March 15 days
May 15 days
Warmest months:
January 86.7 °F
February 86.6 °F
March 84.2 °F
Warmest sea temp:
February 81.1 °F
January 80.6 °F
March 79.8 °F
Coldest months:
June 64.1 °F
July 64.7 °F
August 67.2 °F
Rainiest months:
September 5 days
November 4 days
October 4 days
Windiest months:
December 7.3 mph
November 7.3 mph
January 7.2 mph

Porto Alegre on a weather map

Current weather
12:43
Porto Alegre
+64°F
E 4 mph
Feels like: +64°F
Precip.: 5%
Places in Brazil:
Name
°F
Balneario Camboriu
+72°F
Buzios
+73°F
Joao Pessoa
+81°F
Ilha de Itamaraca
+81°F
Natal
+86°F
Recife
+84°F
Rio de Janeiro
+68°F
Salvador
+79°F
Sao Jose de Ribamar
+82°F
Sao Paulo
+57°F
Sao Sebastiao
+63°F
Santos
+66°F
Florianopolis
+66°F
Fortaleza
+82°F
Xangri-la
+59°F
all places
24 Hours Forecast
Porto Alegre
Local time: 12:43
September 15, tuesday
1500
63°F
N
8 mph
1800
61°F
N
3 mph
2100
59°F
N
1 mph
September 16, wednesday
0000
55°F
SW
1 mph
0300
52°F
SE
4 mph
0600
50°F
N
5 mph
0900
57°F
N
4 mph
1200
57°F
NW
6 mph
Units of measurement: °C / °F