Measurements:
°C
°F
CURRENT WEATHER
18:49
Niteroi
74°F
W 17 mph
Feels like: 80°F
Precip: 29%
World Resorts Brazil Niteroi Weather

7 Day Weather Forecast

09.28
mon
DAY
76°F
NW 11 mph
precip
19%
NIGHT
72°F
SW 5 mph
precip
16%
09.29
tue
DAY
78°F
NW 11 mph
precip
11%
NIGHT
76°F
W 8 mph
precip
15%
09.30
wed
DAY
88°F
SW 2 mph
precip
4%
NIGHT
74°F
E 6 mph
precip
35%
10.01
thu
DAY
74°F
N 3 mph
precip
17%
NIGHT
72°F
NW 2 mph
precip
57%
10.02
fri
DAY
72°F
N 11 mph
precip
78%
NIGHT
70°F
W 19 mph
precip
76%
10.03
sat
DAY
72°F
W 11 mph
precip
72%
NIGHT
72°F
S 6 mph
precip
66%
10.04
sun
DAY
82°F
NE 1 mph
precip
6%
NIGHT
74°F
E 17 mph
precip
46%

Niteroi Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Niteroi was 22.9°F. The maximum and minimum values were 21.9°F and 23.8°F respectively.

Niteroi on the Weather Map

Best Time to Visit Niteroi
The most sunny months:
July 19 days
August 18 days
June 16 days
The most warm months:
February 88.5 °F
March 88.0 °F
January 87.6 °F
Warmest sea temperature:
February 84.0 °F
January 83.4 °F
March 83.0 °F
The most cold months:
July 79.5 °F
June 79.7 °F
August 80.0 °F
The most rainy months:
February 5 days
December 5 days
January 5 days
The most windy months:
September 7 mph
October 6 mph
August 6 mph
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