Live Weather & Forecast
Weather in São Sebastião
São Paulo, Brazil · Real-time conditions & 3-day outlook
25°C
Feels like 26°C
77°F / Feels 79°F
Sunny
São Sebastião, São Paulo
🌞 Daytime
Updated: 2026-04-21 11:30
Humidity
59%
Wind
7.6 km/h SSW
Wind Gust
8.7 km/h
Pressure
1018 mb
Visibility
10 km
UV Index
7.7
(High)
Precipitation
0 mm
Cloud Cover
19%
Dew Point
16.3°C
Wind Degree
202°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
81.9 μg/m³
NO₂
1.3 μg/m³
O₃
75 μg/m³
SO₂
1.4 μg/m³
PM 2.5
9.3 μg/m³
PM 10
13.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for São Sebastião, São Paulo
12 AM
18°
Clear
1 AM
17°
Clear
2 AM
17°
Clear
3 AM
17°
Clear
4 AM
17°
Clear
5 AM
17°
Clear
6 AM
18°
Clear
7 AM
18°
Sunny
8 AM
22°
Sunny
9 AM
24°
Sunny
10 AM
25°
Sunny
11 AM
25°
Sunny
12 PM
25°
Sunny
1 PM
25°
Sunny
2 PM
25°
Sunny
3 PM
25°
Sunny
4 PM
24°
Sunny
5 PM
23°
Sunny
6 PM
21°
Clear
7 PM
20°
Clear
8 PM
20°
Clear
9 PM
19°
Clear
10 PM
19°
Clear
11 PM
19°
Clear
3-Day Forecast
Daily overview for São Sebastião, São Paulo
Today
Sunny
25°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 75%
💨 Max wind: 8.6 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 8.7
🌅 Sunrise: 06:18 AM
🌇 Sunset: 05:43 PM
🌙 Waxing Crescent
🌑 Moon: 17% lit
Wed, Apr 22
Sunny
25°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 7.9 km/h
🌧️ Total precip: 0.02 mm
☀️ UV Index: 8.7
🌅 Sunrise: 06:18 AM
🌇 Sunset: 05:42 PM
🌙 Waxing Crescent
🌑 Moon: 27% lit
Thu, Apr 23
Sunny
26°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 11.9 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 8.6
🌅 Sunrise: 06:19 AM
🌇 Sunset: 05:41 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Best Time to Visit São Sebastião
Plan your trip to São Sebastião, Brazil around the most favorable weather conditions.
Peak Season
December – March
Southern hemisphere summer — warm and generally dry.
Shoulder Season
April – May, November
Fewer crowds, moderate prices, mild weather.
Off Season
June – September
Cooler winter months; indoor activities preferred.
Frequently Asked Questions
What is the current weather in São Sebastião?
Current conditions in São Sebastião: Sunny, temperature 25°C, humidity 59%.
What is the best time to visit São Sebastião?
The best time to visit São Sebastião is typically December – March. Southern hemisphere summer — warm and generally dry.
What is the climate like in São Sebastião?
São Sebastião is located at approximately -23.8° latitude. It experiences a temperate southern hemisphere climate.
Does it rain a lot in São Sebastião?
The wettest period in São Sebastião is typically during June – September. Cooler winter months; indoor activities preferred.
What should I pack for a trip to São Sebastião?
For visits to São Sebastião during December – March: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What are the public holidays in São Sebastião in 2026?
View the 2026 public holidays for São Sebastião on our Holidays page.
What are the GPS coordinates used for the weather forecast in São Sebastião?
The weather forecast for São Sebastião uses coordinates -23.8028, -45.4071.
What is the current temperature outside in São Sebastião?
The current outdoor temperature in São Sebastião is 25°C (77°F) with sunny.
What is the hourly weather forecast for São Sebastião today?
Today's hour-by-hour weather breakdown for São Sebastião is shown in the Hourly Forecast section above, including temperature, rain chance, and conditions for each hour of the day.
What is the weather in São Sebastião tomorrow hour by hour?
Tomorrow's forecast for São Sebastião shows a high of 25°C and a low of 17°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in São Sebastião?
Rain is not expected in São Sebastião today. Current forecast shows no significant rain probability.
Is it going to rain today in São Sebastião?
No, rain is not forecast for São Sebastião today. Current conditions show clear to partly cloudy skies.