15.09
tue
tue
Day
70°F
SW 5 mph
Precip.
11%
11%
Night
57°F
N 2 mph
Precip.
30%
30%
16.09
wed
wed
Day
64°F
W 4 mph
Precip.
25%
25%
Night
55°F
N 2 mph
Precip.
27%
27%
17.09
thu
thu
Day
68°F
SW 6 mph
Precip.
11%
11%
Night
59°F
NW 1 mph
Precip.
44%
44%
18.09
fri
fri
Day
63°F
N 1 mph
Precip.
73%
73%
Night
64°F
W 4 mph
Precip.
82%
82%
19.09
sat
sat
Day
64°F
W 6 mph
Precip.
94%
94%
Night
64°F
W 9 mph
Precip.
95%
95%
20.09
sun
sun
Day
68°F
NE 3 mph
Precip.
49%
49%
Night
64°F
S 1 mph
Precip.
83%
83%
21.09
mon
mon
Day
77°F
E 4 mph
Precip.
35%
35%
Night
68°F
N 1 mph
Precip.
44%
44%
22.09
tue
tue
Day
75°F
SW 3 mph
Precip.
21%
21%
Night
64°F
NW 1 mph
Precip.
60%
60%
23.09
wed
wed
Day
64°F
N 1 mph
Precip.
49%
49%
Night
63°F
NE 2 mph
Precip.
44%
44%
24.09
thu
thu
Day
82°F
S 2 mph
Precip.
9%
9%
Night
64°F
S 0 mph
Precip.
21%
21%
25.09
fri
fri
Day
84°F
SW 2 mph
Precip.
4%
4%
Night
66°F
NW 1 mph
Precip.
44%
44%
26.09
sat
sat
Day
81°F
S 4 mph
Precip.
16%
16%
Night
66°F
SE 1 mph
Precip.
36%
36%
27.09
sun
sun
Day
72°F
SW 4 mph
Precip.
26%
26%
Night
68°F
SE 3 mph
Precip.
52%
52%
28.09
mon
mon
Day
68°F
W 3 mph
Precip.
78%
78%
Night
66°F
E 2 mph
Precip.
60%
60%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 66.2°F. The highest and lowest sea temperatures during the month were 68.4°F and 64.4°F.
Air temperature in Itajai, °F
Precipitation total in Itajai, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Itajai
Itajai on a weather map
Places in Brazil:
Name
°F
24 Hours Forecast
Itajai
Local time: 05:10
September 15, tuesday
0600
50°F
E
2 mph
2 mph
0900
59°F
NE
2 mph
2 mph
1200
70°F
SW
5 mph
5 mph
1500
66°F
W
6 mph
6 mph
1800
59°F
W
2 mph
2 mph
2100
59°F
N
2 mph
2 mph
September 16, wednesday
0000
57°F
N
2 mph
2 mph
0300
55°F
N
1 mph
1 mph
