Monthly weather forecast and climate
Niterói, Brazil

The best months for a swim in Niterói, Brazil, are January through April, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

An excellent water temperature of 25.1°C (77.2°F) makes January in Niterói, Brazil, a prime for swimming and other water activities. In Niterói, Brazil, the average seawater temperature in January is 25.1°C (77.2°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in January »

The perfect water temperature of 25.3°C (77.5°F) makes February a great period for swimming and other water activities in Niterói, Brazil. In Niterói, Brazil, the average seawater temperature is 25.3°C (77.5°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in February »

The perfect water temperature of 25.8°C (78.4°F) makes March a great period for swimming and other water activities in Niterói, Brazil. The month with the warmest seawater is March, with an average sea temperature of 25.8°C (78.4°F). Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. Weather in March »

The perfect water temperature of 25.4°C (77.7°F) makes April a great period for swimming and other water activities in Niterói, Brazil. In Niterói, the average seawater temperature in April is 25.4°C (77.7°F). Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable. Weather in April »

In Niterói, Brazil, in May, the average water temperature is 24.3°C (75.7°F). Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. Weather in May »

In Niterói, Brazil, in June, the average water temperature is 23.3°C (73.9°F). Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. Weather in June »

In Niterói, Brazil, in July, the average water temperature is 22.1°C (71.8°F). Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22.1°C (71.8°F) water. Weather in July »

In Niterói, Brazil, in August, the average water temperature is 22.3°C (72.1°F). Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22.3°C (72.1°F) water may be enjoyable. Weather in August »

September is the month with the coldest seawater in Niterói, Brazil, with an average sea temperature of 21.6°C (70.9°F). Note: For most, swimming in 21.6°C (70.9°F) is not an enjoyable activity. Weather in September »

In Niterói, Brazil, the average seawater temperature in October is 22.7°C (72.9°F). Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22.7°C (72.9°F) water may be enjoyable. Weather in October »

In November, the average sea temperature in Niterói, Brazil, is 23.2°C (73.8°F). Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 23.2°C (73.8°F) water. Weather in November »

In Niterói, Brazil, in December, the average water temperature is 24°C (75.2°F). Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 24°C (75.2°F) water. Weather in December »

When is the sea warmest in Niterói?

March is the month with the warmest seawater, with an average sea temperature of 25.8°C (78.4°F).

What is the month with the shortest days in Niterói?

The month with the shortest days is June, with an average of 10.7h of daylight.

What is the month with the coldest sea water in Niterói?

September is the month with the coldest seawater, with an average sea temperature of 21.6°C (70.9°F).

When are the longest days in Niterói?

December has the longest days of the year, with an average of 13.5h of daylight.
Average sea temperature - Niterói, Brazil

The best month for swimming (with the highest average sea temperature) is March (25.8°C).
The coldest month (with the lowest average sea temperature) is September (21.6°C).

Average daylight - Niterói, Brazil

The month with the longest days is December (Average daylight: 13.5h).
The month with the shortest days is June (Average daylight: 10.7h).