Measurements:
°C
°F
CURRENT WEATHER
17:17
Porto Alegre
66°F
N 4 mph
Feels like: 66°F
Precip: 4%
World Resorts Brazil Porto Alegre Weather

7 Day Weather Forecast

09.08
tue
DAY
68°F
SE 4 mph
precip
2%
NIGHT
58°F
N 4 mph
precip
22%
09.09
wed
DAY
70°F
NW 6 mph
precip
14%
NIGHT
62°F
W 4 mph
precip
25%
09.10
thu
DAY
70°F
N 2 mph
precip
21%
NIGHT
64°F
NW 5 mph
precip
32%
09.11
fri
DAY
66°F
W 2 mph
precip
91%
NIGHT
62°F
E 21 mph
precip
36%
09.12
sat
DAY
56°F
NE 8 mph
precip
38%
NIGHT
56°F
N 7 mph
precip
29%
09.13
sun
DAY
64°F
NW 7 mph
precip
13%
NIGHT
56°F
NW 11 mph
precip
21%
09.14
mon
DAY
58°F
W 11 mph
precip
33%
NIGHT
58°F
W 7 mph
precip
66%

Porto Alegre Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Porto Alegre was 17.9°F. The maximum and minimum values were 16.9°F and 18.8°F respectively.

Porto Alegre on the Weather Map

Best Time to Visit Porto Alegre
The most sunny months:
February 15 days
March 15 days
May 15 days
The most warm months:
January 90.7 °F
February 90.6 °F
March 88.0 °F
Warmest sea temperature:
February 84.6 °F
January 84.0 °F
March 83.2 °F
The most cold months:
June 65.7 °F
July 66.3 °F
August 69.1 °F
The most rainy months:
September 5 days
November 4 days
October 4 days
The most windy months:
December 7 mph
November 7 mph
January 7 mph
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