Live Weather & Forecast
Weather in São Sebastião do Caí
Rio Grande do Sul, Brazil · Real-time conditions & 3-day outlook
19°C
Feels like 19°C
67°F / Feels 67°F
Mist
São Sebastião do Caí, Rio Grande do Sul
🌙 Nighttime
Updated: 2026-04-21 06:30
Humidity
100%
Wind
3.6 km/h N
Wind Gust
5.3 km/h
Pressure
1015 mb
Visibility
5 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
15.5°C
Wind Degree
352°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (2)
CO
186.9 μg/m³
NO₂
15.5 μg/m³
O₃
31 μg/m³
SO₂
2.3 μg/m³
PM 2.5
16.2 μg/m³
PM 10
16.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for São Sebastião do Caí, Rio Grande do Sul
12 AM
18°
Clear
1 AM
18°
Clear
2 AM
18°
Partly Cloudy
3 AM
18°
Cloudy
4 AM
18°
Partly Cloudy
5 AM
17°
Partly Cloudy
6 AM
19°
Mist
7 AM
18°
Partly Cloudy
8 AM
19°
Partly Cloudy
9 AM
21°
Partly Cloudy
10 AM
22°
Partly Cloudy
11 AM
23°
Partly Cloudy
12 PM
24°
Patchy rain nearby
1 PM
23°
Patchy rain nearby
2 PM
23°
Patchy rain nearby
3 PM
24°
Patchy rain nearby
4 PM
24°
Partly Cloudy
5 PM
24°
Partly Cloudy
6 PM
21°
Partly Cloudy
7 PM
21°
Partly Cloudy
8 PM
20°
Partly Cloudy
9 PM
19°
Partly Cloudy
10 PM
19°
Partly Cloudy
11 PM
19°
Partly Cloudy
3-Day Forecast
Daily overview for São Sebastião do Caí, Rio Grande do Sul
Today
Partly Cloudy
24°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 73%
💨 Max wind: 6.1 km/h
🌧️ Total precip: 0.06 mm
☀️ UV Index: 3.7
🌅 Sunrise: 06:48 AM
🌇 Sunset: 06:00 PM
🌙 Waxing Crescent
🌑 Moon: 17% lit
Wed, Apr 22
Partly Cloudy
31°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 65%
💨 Max wind: 9.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 6.9
🌅 Sunrise: 06:49 AM
🌇 Sunset: 05:59 PM
🌙 Waxing Crescent
🌑 Moon: 27% lit
Thu, Apr 23
Moderate rain
24°
/
18°
🌧️ 79% chance of rain
💧 Avg. humidity: 92%
💨 Max wind: 8.3 km/h
🌧️ Total precip: 6.78 mm
☀️ UV Index: 4.5
🌅 Sunrise: 06:49 AM
🌇 Sunset: 05:58 PM
🌙 Waxing Crescent
🌑 Moon: 38% lit
Best Time to Visit São Sebastião do Caí
Plan your trip to São Sebastião do Caí, 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 do Caí?
Current conditions in São Sebastião do Caí: Mist, temperature 19°C, humidity 100%.
What is the best time to visit São Sebastião do Caí?
The best time to visit São Sebastião do Caí is typically December – March. Southern hemisphere summer — warm and generally dry.
What is the climate like in São Sebastião do Caí?
São Sebastião do Caí is located at approximately -29.6° latitude. It experiences a temperate southern hemisphere climate.
Does it rain a lot in São Sebastião do Caí?
The wettest period in São Sebastião do Caí is typically during June – September. Cooler winter months; indoor activities preferred.
What should I pack for a trip to São Sebastião do Caí?
For visits to São Sebastião do Caí during December – March: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is São Sebastião do Caí in?
São Sebastião do Caí is located in Brazil, in the state of Rio Grande do Sul.
What are the public holidays in São Sebastião do Caí in 2026?
View the 2026 public holidays for São Sebastião do Caí on our Holidays page.
What are the GPS coordinates used for the weather forecast in São Sebastião do Caí?
The weather forecast for São Sebastião do Caí uses coordinates -29.5912, -51.3779.
What is the current temperature outside in São Sebastião do Caí?
The current outdoor temperature in São Sebastião do Caí is 19°C (66°F) with mist.
What is the hourly weather forecast for São Sebastião do Caí today?
Today's hour-by-hour weather breakdown for São Sebastião do Caí 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 do Caí tomorrow hour by hour?
Tomorrow's forecast for São Sebastião do Caí shows a high of 31°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 do Caí?
Rain is not expected in São Sebastião do Caí today. Current forecast shows no significant rain probability.
Is it going to rain today in São Sebastião do Caí?
No, rain is not forecast for São Sebastião do Caí today. Current conditions show clear to partly cloudy skies.