Measurements:
°C
°F
Niteroi
74°F
N 4 mph
Feels like: 74°F
Precip: 100%
World Resorts Brazil Niteroi Weather

Niteroi Sea Water Temperature

Current Sea Water Temperature:
+83.0°F
Maximum Sea Water Temperature in December: 84.2°F
Minimum Sea Water Temperature in December: 77.4°F
Average water temperature in December: 80.4°F

Sea Water Temperature for the Last 10 Days:

December 17 83.0°F December 12 80.4°F
December 16 82.8°F December 11 82.8°F
December 15 79.4°F December 10 82.0°F
December 14 79.6°F December 09 79.4°F
December 13 79.6°F December 08 79.8°F

When is the Warmest Sea for Niteroi?

According to our data for the last three years for Niteroi the highest average sea water temperature was in February, January and March.

Average Water Temperature by Month, °F

Sea Water Temperature in February

Select Year: 2025 2024 2023

The average sea surface temperature in February 2025 for Niteroi was 84.3°F. The maximum and minimum values were 82.2°F and 85.8°F respectively.

Sea Water Temperature in January

Select Year: 2025 2024 2023

The average sea surface temperature in January 2025 for Niteroi was 82.2°F. The maximum and minimum values were 78.2°F and 86.6°F respectively.

Sea Water Temperature in March

Select Year: 2025 2024 2023

The average sea surface temperature in March 2025 for Niteroi was 82.0°F. The maximum and minimum values were 80.0°F and 83.8°F respectively.

Best Time to Visit Niteroi
The most sunny months:
July 20 days
August 19 days
May 16 days
The most warm months:
February 88.8 °F
March 88.7 °F
January 88.0 °F
Warmest sea temperature:
February 83.6 °F
January 83.3 °F
March 83.1 °F
The most cold months:
July 79.6 °F
June 80.2 °F
August 80.3 °F
The most rainy months:
December 6 days
February 5 days
January 5 days
The most windy months:
October 6 mph
September 6 mph
August 6 mph

Niteroi on the Weather Map

24 Hours Weather Forecast
Niteroi
Local time: 21:09
18 dec, thursday
0000 72°F
N
4 mph
0300 72°F
N
4 mph
0600 74°F
N
2 mph
0900 76°F
N
2 mph
1200 78°F
N
6 mph
1500 74°F
NW
5 mph
1800 74°F
W
4 mph
2100 74°F
SW
3 mph