, with a relatively cool and dry season from June to August, and a hot and rainy season from November to March.
The city is located in southeastern Brazil, in the state of Rio de Janeiro, at 21 degrees south latitude. The Atlantic Ocean coast, where São João da Barra is located, is 30 kilometers (18 miles) away.
Sometimes in winter, from June to August, there can be slightly cool days, with highs of 22/23 °C (72/73 °F). At night the temperature can drop to 11/12 °C (52/54 °F). In July 1975 it dropped to 9 °C (48 °F).
In the hot season, from November to March, the sea breeze tempers the heat, however, there can be very hot periods.
From mid-August to October, in spring, the temperature rises and there can be very hot periods, however, sometimes cool, winter-like weather can return. The rains become more frequent, although they are not yet as frequent as in the summer.
The best time to visit Campos dos Goytacazes is from May to August, being the coolest and driest of the year. The sea is warm enough for swimming, although it is cooler than in the other months, moreover, sometimes there can be cool days. For a beach holiday you can then choose the period from February to April, even though it is hot and muggy and thunderstorms can break out.
. Here are the average temperatures.
January is generally a very hot, muggy month. The average temperature is of
28 °C, with a minimum of
23.6 °C and a maximum of
32.3 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C. However, it dropped to
18.1 °C in January 1991.

On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
39 °C in January 2016.

Precipitation amounts to
135 mm, distributed over 9 days.
The day lasts on average 13 hours and 20 minutes.

There are on average 6.5 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
17.3 kph.

The average sea temperature is of
25.9 °C. Therefore, the sea is warm enough for swimming.
February, the hottest month of the year, is generally a very hot month. The average temperature is of
28.5 °C, with a minimum of
24.1 °C and a maximum of
32.9 °C.

On the coldest nights of the month, the temperature usually drops to around
21.5 °C. However, it dropped to
19.1 °C in February 2005.

On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
40 °C in February 2010.

Precipitation amounts to
60 mm, distributed over 7 days.
The day lasts on average 12 hours and 50 minutes.

There are on average 7.5 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 70%.
The average wind speed is of
15.9 kph.

The average sea temperature is of
26.5 °C. Therefore, the sea is pleasantly warm and allows long swims.
March is generally a very hot, muggy month. The average temperature is of
27.7 °C, with a minimum of
23.7 °C and a maximum of
31.8 °C.

On the coldest nights of the month, the temperature usually drops to around
21 °C. However, it dropped to
19 °C in March 2020.

On the warmest days of the month, the temperature usually reaches around
36.5 °C. However, it reached
39 °C in March 2017.

Precipitation amounts to
105 mm, distributed over 9 days.
The day lasts on average 12 hours and 10 minutes.

There are on average 6 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
12 kph.

The average sea temperature is of
26.8 °C. Therefore, the sea is pleasantly warm and allows long swims.
April is generally a warm to hot, muggy month. The average temperature is of
26.3 °C, with a minimum of
22.2 °C and a maximum of
30.4 °C.

On the coldest nights of the month, the temperature usually drops to around
19 °C. However, it dropped to
17.4 °C in April 2004.

On the warmest days of the month, the temperature usually reaches around
34.5 °C. However, it reached
37.3 °C in April 2016.

Precipitation amounts to
85 mm, distributed over 7 days.
The day lasts on average 11 hours and 35 minutes.

There are on average 6 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
10.5 kph.

The average sea temperature is of
26.5 °C. Therefore, the sea is pleasantly warm and allows long swims.
May is generally a warm to hot, muggy month. The average temperature is of
24.1 °C, with a minimum of
19.8 °C and a maximum of
28.4 °C.

On the coldest nights of the month, the temperature usually drops to around
16 °C. However, it dropped to
14.4 °C in May 2020.

On the warmest days of the month, the temperature usually reaches around
33 °C. However, it reached
34 °C in May 2009.

Precipitation amounts to
45 mm, distributed over 6 days.
The day lasts on average 11 hours and 5 minutes.

There are on average 6 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
10.1 kph.

The average sea temperature is of
25.2 °C. Therefore, the sea is warm enough for swimming.
June is generally a warm to hot, muggy month. The average temperature is of
23.1 °C, with a minimum of
18.4 °C and a maximum of
27.8 °C.

On the coldest nights of the month, the temperature usually drops to around
15 °C. However, it dropped to
11.2 °C in June 1994.

On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
35 °C in June 2012.

Precipitation amounts to
30 mm, distributed over 4 days.
The day lasts on average 10 hours and 50 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.

There are on average 6 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
10.6 kph.

The average sea temperature is of
24.1 °C. Therefore, the sea is warm enough for swimming.
July, the coolest month of the year, is generally a warm to hot, muggy month. The average temperature is of
22.6 °C, with a minimum of
17.7 °C and a maximum of
27.4 °C.

On the coldest nights of the month, the temperature usually drops to around
14.5 °C. However, it dropped to
11 °C in July 2000.

On the warmest days of the month, the temperature usually reaches around
32 °C. However, it reached
35.7 °C in July 2016.

Precipitation amounts to
30 mm, distributed over 5 days.
The day lasts on average 11 hours and 0 minutes.

There are on average 6 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
12.6 kph.

The average sea temperature is of
23.4 °C. Therefore, the sea can be considered barely acceptable for swimming.
August is generally a warm to hot, muggy month. The average temperature is of
22.8 °C, with a minimum of
18.2 °C and a maximum of
27.4 °C.

On the coldest nights of the month, the temperature usually drops to around
14.5 °C. However, it dropped to
12.6 °C in August 2004.

On the warmest days of the month, the temperature usually reaches around
32.5 °C. However, it reached
35 °C in August 2011.

Precipitation amounts to
25 mm, distributed over 3 days.
The day lasts on average 11 hours and 25 minutes.

There are on average 6 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
15.4 kph.

The average sea temperature is of
22.9 °C. Therefore, the sea can be considered barely acceptable for swimming.
September is generally a warm to hot, muggy month. The average temperature is of
24.1 °C, with a minimum of
19.9 °C and a maximum of
28.3 °C.

On the coldest nights of the month, the temperature usually drops to around
15.5 °C. However, it dropped to
11.8 °C in September 2019.

On the warmest days of the month, the temperature usually reaches around
35 °C. However, it reached
39 °C in September 2007.

Precipitation amounts to
70 mm, distributed over 7 days.
The day lasts on average 12 hours and 0 minutes.

There are on average 4.5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
19 kph.

The average sea temperature is of
22.9 °C. Therefore, the sea can be considered barely acceptable for swimming.
October is generally a warm to hot, muggy month. The average temperature is of
25.3 °C, with a minimum of
21.4 °C and a maximum of
29.1 °C.

On the coldest nights of the month, the temperature usually drops to around
17 °C. However, it dropped to
14.6 °C in October 2003.

On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
40 °C in October 2012.

Precipitation amounts to
100 mm, distributed over 8 days.
The day lasts on average 12 hours and 35 minutes.

There are on average 4.5 hours of sunshine per day. So, the sun shines 34% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
18.9 kph.

The average sea temperature is of
23.4 °C. Therefore, the sea can be considered barely acceptable for swimming.
November is generally a warm to hot, muggy month. The average temperature is of
25.7 °C, with a minimum of
22.1 °C and a maximum of
29.4 °C.

On the coldest nights of the month, the temperature usually drops to around
18 °C. However, it dropped to
15.6 °C in November 2003.

On the warmest days of the month, the temperature usually reaches around
35.5 °C. However, it reached
38.6 °C in November 2015.

Precipitation amounts to
165 mm, distributed over 11 days.
The day lasts on average 13 hours and 10 minutes.

There are on average 5 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
16.3 kph.

The average sea temperature is of
24.2 °C. Therefore, the sea is warm enough for swimming.
December is generally a warm to hot, muggy month. The average temperature is of
27.2 °C, with a minimum of
23.2 °C and a maximum of
31.1 °C.

On the coldest nights of the month, the temperature usually drops to around
19.5 °C. However, it dropped to
16.2 °C in December 2018.

On the warmest days of the month, the temperature usually reaches around
36 °C. However, it reached
39 °C in December 2014.

Precipitation amounts to
170 mm, distributed over 12 days.
The day lasts on average 13 hours and 25 minutes. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.

There are on average 5 hours of sunshine per day. So, the sun shines 38% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of
14.9 kph.

The average sea temperature is of
25.2 °C. Therefore, the sea is warm enough for swimming.