São Sebastião Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit São Sebastião.
Climate overview of São Sebastião
With consistently stable weather, São Sebastião, São Paulo State, Brazil, sees little seasonal temperature change. Daytime highs average 25°C (77°F), ranging from 28°C (82°F) in February to 23°C (73°F) in July.
Rainfall is high, totalling around 1757 mm (69 in) per year. January is the wettest month and August the driest. The city also experiences a distinct rainy season from December to March. The most sunshine falls in July, with an average of 3.7 hours of daily sunshine.
São Sebastião Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in São Sebastião — and find the best time to visit.
Monthly Temperature in São Sebastião
The climate in São Sebastião remains fairly constant, offering comfortable temperatures throughout the year. Average maximum daytime temperatures range from a comfortable 28°C (82°F) in February, the warmest time of the year, to a comfortable 23°C (73°F) during cooler months like July.
At night, you can expect temperatures ranging from 24°C (75°F) in February to around 18°C (64°F) during July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in São Sebastião
São Sebastião is known for its substantial rainfall, with annual precipitation reaching 1757 mm (69 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, January it receives heavy rainfall, averaging 228 mm (9 in) of precipitation, recorded across 18 rainy days. In contrast, the driest month August brings less rainfall, with 78 mm (3.1 in) over 10 rainy days. For more details, please visit our São Sebastião Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in São Sebastião
While the amount of sunshine in São Sebastião varies throughout the year, all seasons offer their own charm. Enjoy up to 3.7 hours of daily sun in July, and experience slightly darker atmosphere in October, with about 2.5 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit São Sebastião
The weather does bring rainfall during this period, between 78 mm (3.1 in) and 139 mm (5.5 in).
Plan accordingly for January, February, March, November and December, when conditions bring the heaviest precipitation. Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.
Frequently asked questions about the climate in São Sebastião
What is the best time to visit São Sebastião?
June, July and August typically offer the most optimal weather in São Sebastião. In contrast, January, February and March tend to have less optimal conditions. São Sebastião has a distinct rainy season from December to March.
What temperatures can I expect in São Sebastião?
Daytime highs range from 23°C (73°F) in July to 28°C (82°F) in February. Nighttime lows range from 18°C (64°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does São Sebastião get?
Annual rainfall is around 1757 mm (69 in). January is the wettest month with 228 mm (9 in), while August is the driest with 78 mm (3.1 in).
How sunny is São Sebastião?
São Sebastião receives around 1,182 hours of sunshine per year. July is the sunniest month with 111 hours, while October is the cloudiest with just 74 hours.
São Sebastião 3-Day Forecast
São Sebastião 3-Day Forecast
São Sebastião on the map
São Sebastião is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Fortaleza
31°C (88°F) Salvador
26°C (79°F) Rio de Janeiro
26°C (79°F) Búzios
25°C (77°F) Sao Paulo23°C (73°F) Paraty23°C (73°F) Florianópolis21°C (70°F) Gramado
19°C (66°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 10 most alternative cities in South America
Discover South America's top 10 alternative cities! From Valparaíso's vibrant streets to La Paz's high-altitude charm and Medellín's innovative spirit.
The 5 most tranquil retreats in the Amazon Rainforest, Brazil
Discover top sustainable lodges in the Amazon. Enjoy unique wildlife, eco-friendly stays, and immersive experiences at Anavilhanas, Cristalino, and more.
An alternative way to discover Rio de Janeiro
Don't feel like seeing the traditional tourist sights in Rio de Janeiro? We have made an overview of the sights in Rio de Janeiro that you must see if you want to visit Rio in an alternative way.
Iguazu Falls
Iguazu Falls are among the largest waterfalls on earth. You will be speechless when you see this miracle of mother nature. They are included in the World Heritage List and have also been named one of the seven wonders of the world.