26.08
wed
wed
Day
70°F
SW 3 mph
Precip.
13%
13%
Night
64°F
SW 3 mph
Precip.
12%
12%
27.08
thu
thu
Day
82°F
S 6 mph
Precip.
2%
2%
Night
73°F
E 2 mph
Precip.
17%
17%
28.08
fri
fri
Day
72°F
NW 5 mph
Precip.
44%
44%
Night
64°F
N 7 mph
Precip.
80%
80%
29.08
sat
sat
Day
64°F
N 5 mph
Precip.
78%
78%
Night
64°F
N 6 mph
Precip.
80%
80%
30.08
sun
sun
Day
64°F
N 7 mph
Precip.
77%
77%
Night
63°F
N 6 mph
Precip.
44%
44%
31.08
mon
mon
Day
63°F
N 9 mph
Precip.
43%
43%
Night
57°F
N 6 mph
Precip.
38%
38%
01.09
tue
tue
Day
66°F
NW 6 mph
Precip.
2%
2%
Night
55°F
W 8 mph
Precip.
8%
8%
sea water
temperature
temperature
| Porto Alegre |
monthly
weather
weather
| Porto Alegre |
current
weather
weather
| Porto Alegre |
14 days
forecast
forecast
| Porto Alegre |
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 62.8°F. The highest and lowest sea temperatures during the month were 66.0°F and 59.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 64.3°F. The highest and lowest sea temperatures during the month were 65.8°F and 62.4°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
Porto Alegre on a weather map
Places in Brazil:
Name
°F
24 Hours Forecast
Porto Alegre
Local time: 10:54
August 26, wednesday
1200
70°F
SW
3 mph
3 mph
1500
73°F
NW
4 mph
4 mph
1800
68°F
NW
5 mph
5 mph
2100
64°F
NW
4 mph
4 mph
August 27, thursday
0000
64°F
SW
3 mph
3 mph
0300
64°F
SW
4 mph
4 mph
0600
63°F
SW
4 mph
4 mph
0900
68°F
SW
4 mph
4 mph
