16.07
thu
thu
Day
73°F
W 3 mph
Precip.
1%
1%
Night
63°F
SW 6 mph
Precip.
5%
5%
17.07
fri
fri
Day
77°F
W 2 mph
Precip.
1%
1%
Night
64°F
SW 6 mph
Precip.
4%
4%
18.07
sat
sat
Day
79°F
SW 4 mph
Precip.
1%
1%
Night
68°F
SW 6 mph
Precip.
5%
5%
19.07
sun
sun
Day
82°F
SW 3 mph
Precip.
1%
1%
Night
68°F
SW 6 mph
Precip.
5%
5%
20.07
mon
mon
Day
81°F
SW 5 mph
Precip.
3%
3%
Night
70°F
S 6 mph
Precip.
3%
3%
21.07
tue
tue
Day
84°F
S 4 mph
Precip.
1%
1%
Night
72°F
S 5 mph
Precip.
3%
3%
22.07
wed
wed
Day
86°F
E 2 mph
Precip.
1%
1%
Night
68°F
S 1 mph
Precip.
11%
11%
23.07
thu
thu
Day
81°F
N 4 mph
Precip.
2%
2%
Night
68°F
SW 1 mph
Precip.
11%
11%
24.07
fri
fri
Day
79°F
N 7 mph
Precip.
3%
3%
Night
70°F
SE 2 mph
Precip.
24%
24%
25.07
sat
sat
Day
81°F
NW 4 mph
Precip.
3%
3%
Night
70°F
SE 2 mph
Precip.
10%
10%
26.07
sun
sun
Day
79°F
NE 9 mph
Precip.
4%
4%
Night
70°F
SE 3 mph
Precip.
21%
21%
27.07
mon
mon
Day
77°F
NW 6 mph
Precip.
6%
6%
Night
70°F
SW 4 mph
Precip.
11%
11%
28.07
tue
tue
Day
86°F
W 2 mph
Precip.
1%
1%
Night
75°F
S 6 mph
Precip.
3%
3%
29.07
wed
wed
Day
91°F
SE 7 mph
Precip.
0%
0%
Night
72°F
SE 2 mph
Precip.
5%
5%
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 72.9°F. The highest and lowest sea temperatures during the month were 74.3°F and 71.6°F.
Air temperature in Niteroi, °F
Precipitation total in Niteroi, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Niteroi
Niteroi on a weather map
Places in Brazil:
Name
°F
24 Hours Forecast
Niteroi
Local time: 22:42
July 17, friday
0000
63°F
SW
6 mph
6 mph
0300
61°F
SW
6 mph
6 mph
0600
61°F
S
6 mph
6 mph
0900
68°F
S
6 mph
6 mph
1200
77°F
W
2 mph
2 mph
1500
79°F
W
6 mph
6 mph
1800
72°F
SW
6 mph
6 mph
2100
66°F
SW
6 mph
6 mph
