17.03
tue
tue
Day
91°F
S 2 mph
Precip.
0%
0%
Night
75°F
W 3 mph
Precip.
0%
0%
18.03
wed
wed
Day
84°F
N 4 mph
Precip.
0%
0%
Night
73°F
W 10 mph
Precip.
100%
100%
19.03
thu
thu
Day
72°F
NW 9 mph
Precip.
100%
100%
Night
70°F
W 9 mph
Precip.
0%
0%
20.03
fri
fri
Day
86°F
NW 4 mph
Precip.
0%
0%
Night
72°F
W 7 mph
Precip.
0%
0%
21.03
sat
sat
Day
90°F
SW 1 mph
Precip.
0%
0%
Night
75°F
N 4 mph
Precip.
0%
0%
22.03
sun
sun
Day
86°F
N 4 mph
Precip.
0%
0%
Night
73°F
W 7 mph
Precip.
0%
0%
23.03
mon
mon
Day
88°F
W 5 mph
Precip.
0%
0%
Night
73°F
W 5 mph
Precip.
0%
0%
24.03
tue
tue
Day
86°F
NE 2 mph
Precip.
0%
0%
Night
75°F
NW 3 mph
Precip.
0%
0%
25.03
wed
wed
Day
86°F
N 5 mph
Precip.
0%
0%
Night
75°F
W 9 mph
Precip.
0%
0%
26.03
thu
thu
Day
90°F
SW 2 mph
Precip.
0%
0%
Night
77°F
SW 2 mph
Precip.
100%
100%
27.03
fri
fri
Day
79°F
E 5 mph
Precip.
82%
82%
Night
73°F
SE 3 mph
Precip.
100%
100%
28.03
sat
sat
Day
72°F
N 4 mph
Precip.
100%
100%
Night
70°F
NW 2 mph
Precip.
100%
100%
29.03
sun
sun
Day
79°F
NW 9 mph
Precip.
100%
100%
Night
70°F
W 8 mph
Precip.
0%
0%
30.03
mon
mon
Day
73°F
NW 11 mph
Precip.
0%
0%
Night
72°F
NW 9 mph
Precip.
0%
0%
sea water
temperature
temperature
| Porto Alegre |
monthly
weather
weather
| Porto Alegre |
current
weather
weather
| Porto Alegre |
7 days
forecast
forecast
| Porto Alegre |
Sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 78.8°F. The highest and lowest sea temperatures during the month were 80.8°F and 77.7°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
Porto Alegre on a weather map
Places in Brazil:
Name
°F
24 Hours Forecast
Porto Alegre
Local time: 08:09
March 17, tuesday
0900
79°F
SW
3 mph
3 mph
1200
91°F
S
2 mph
2 mph
1500
95°F
N
6 mph
6 mph
1800
86°F
W
13 mph
13 mph
2100
75°F
SE
7 mph
7 mph
March 18, wednesday
0000
75°F
W
3 mph
3 mph
0300
73°F
W
3 mph
3 mph
0600
73°F
W
2 mph
2 mph
