Live Weather & Forecast
Weather in San Sebastián
Puerto Rico, United States · Real-time conditions & 3-day outlook
23°C
Feels like 25°C
74°F / Feels 78°F
Partly cloudy
San Sebastián, Puerto Rico
🌙 Nighttime
Updated: 2026-04-16 06:00
Humidity
83%
Wind
7.2 km/h ESE
Wind Gust
15.1 km/h
Pressure
1013 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
20.9°C
Wind Degree
109°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
112.9 μg/m³
NO₂
1.4 μg/m³
O₃
59 μg/m³
SO₂
2.1 μg/m³
PM 2.5
6.3 μg/m³
PM 10
7.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for San Sebastián, Puerto Rico
12 AM
23°
Partly Cloudy
1 AM
23°
Partly Cloudy
2 AM
23°
Partly Cloudy
3 AM
23°
Partly Cloudy
4 AM
23°
Partly Cloudy
5 AM
22°
Clear
6 AM
23°
Partly cloudy
7 AM
24°
Sunny
8 AM
25°
Sunny
9 AM
26°
Partly Cloudy
10 AM
27°
Partly Cloudy
11 AM
28°
Partly Cloudy
12 PM
28°
Cloudy
1 PM
27°
Thundery outbreaks in nearby
2 PM
27°
Cloudy
3 PM
27°
Thundery outbreaks in nearby
4 PM
26°
Thundery outbreaks in nearby
5 PM
26°
Heavy rain at times
6 PM
25°
Partly Cloudy
7 PM
24°
Thundery outbreaks in nearby
8 PM
24°
Moderate or heavy rain shower
9 PM
24°
Mist
10 PM
23°
Mist
11 PM
23°
Light rain shower
3-Day Forecast
Daily overview for San Sebastián, Puerto Rico
Today
Heavy rain
29°
/
22°
🌧️ 88% chance of rain
💧 Avg. humidity: 86%
💨 Max wind: 7.9 km/h
🌧️ Total precip: 28.71 mm
☀️ UV Index: 2.4
🌅 Sunrise: 06:10 AM
🌇 Sunset: 06:45 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Heavy rain
27°
/
20°
🌧️ 89% chance of rain
💧 Avg. humidity: 92%
💨 Max wind: 11.2 km/h
🌧️ Total precip: 137.56 mm
☀️ UV Index: 2.4
🌅 Sunrise: 06:10 AM
🌇 Sunset: 06:45 PM
🌙 New Moon
🌑 Moon: 0% lit
Sat, Apr 18
Heavy rain
27°
/
21°
🌧️ 88% chance of rain
💧 Avg. humidity: 91%
💨 Max wind: 9 km/h
🌧️ Total precip: 95.29 mm
☀️ UV Index: 2.3
🌅 Sunrise: 06:09 AM
🌇 Sunset: 06:46 PM
🌙 Waxing Crescent
🌑 Moon: 1% lit
Best Time to Visit San Sebastián
Plan your trip to San Sebastián, United States around the most favorable weather conditions.
Peak Season
November – April
Dry season — low humidity, clear skies, comfortable temperatures.
Shoulder Season
May, October
Fewer crowds, moderate prices, mild weather.
Off Season
June – September
Wet/monsoon season; heavier rainfall possible.
Frequently Asked Questions
What is the current weather in San Sebastián?
Current conditions in San Sebastián: Partly cloudy, temperature 23°C, humidity 83%.
What is the best time to visit San Sebastián?
The best time to visit San Sebastián is typically November – April. Dry season — low humidity, clear skies, comfortable temperatures.
What is the climate like in San Sebastián?
San Sebastián is located at approximately 18.3° latitude. It has a tropical or subtropical climate with wet and dry seasons.
Does it rain a lot in San Sebastián?
The wettest period in San Sebastián is typically during June – September. Wet/monsoon season; heavier rainfall possible.
What should I pack for a trip to San Sebastián?
For visits to San Sebastián during November – April: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is San Sebastián in?
San Sebastián is located in United States, in the state of Puerto Rico.
What are the public holidays in San Sebastián in 2026?
View the 2026 public holidays for San Sebastián on our Holidays page.
What are the GPS coordinates used for the weather forecast in San Sebastián?
The weather forecast for San Sebastián uses coordinates 18.3366, -66.9911.