National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

Partly Cloudy

89°F

32°C

Humidity 65%
Wind Speed NE 15 mph
Barometer 29.93 in (1013.5 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 19 Sep 12:56 pm AST
Extended Forecast for

Tierras Nuevas Poniente PR

Heat Advisory September 19, 01:14pm until September 19, 05:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 19, 01:14pm until September 19, 05:00pm

    NOW until 5:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 89 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 74. Southeast wind 6 to 10 mph. Chance of precipitation is 40%.

    Low: 74 °F

    Scattered
    Showers

  • Sunday

    Sunday: Isolated showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 89. Heat index values as high as 103. East northeast wind 7 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 89 °F

    Isolated
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Scattered showers and thunderstorms before midnight, then isolated showers. Partly cloudy, with a low around 74. Southeast wind 5 to 8 mph. Chance of precipitation is 50%.

    Low: 74 °F

    Scattered
    Showers then
    Isolated
    Showers

  • Monday

    Monday: Scattered showers and thunderstorms after noon. Mostly sunny, with a high near 89. East wind 6 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 89 °F

    Sunny then
    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers, mainly before midnight. Partly cloudy, with a low around 75. Southeast wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. East northeast wind 8 to 15 mph, with gusts as high as 21 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. East southeast wind 6 to 13 mph.

    Low: 74 °F

    Clear

Detailed Forecast

This Afternoon
Isolated showers, then scattered showers and thunderstorms after 3pm. Partly sunny, with a high near 89. Heat index values as high as 105. East northeast wind around 15 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Scattered showers before midnight, then isolated showers after 3am. Partly cloudy, with a low around 74. Southeast wind 6 to 10 mph. Chance of precipitation is 40%.
Sunday
Isolated showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 89. Heat index values as high as 103. East northeast wind 7 to 16 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
Scattered showers and thunderstorms before midnight, then isolated showers. Partly cloudy, with a low around 74. Southeast wind 5 to 8 mph. Chance of precipitation is 50%.
Monday
Scattered showers and thunderstorms after noon. Mostly sunny, with a high near 89. East wind 6 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Monday Night
Scattered showers, mainly before midnight. Partly cloudy, with a low around 75. Southeast wind 5 to 7 mph. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 89. East northeast wind 8 to 15 mph, with gusts as high as 21 mph.
Tuesday Night
Clear, with a low around 74. East southeast wind 6 to 13 mph.
Wednesday
Sunny, with a high near 88. East northeast wind 10 to 18 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Scattered showers. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
Thursday Night
Mostly clear, with a low around 74.
Friday
Scattered showers. Mostly sunny, with a high near 90. Chance of precipitation is 50%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tierras Nuevas Poniente PR
 18.47°N 66.48°W (Elev. 56 ft)
Last Update:
4:49 am AST Sep 19, 2026
Forecast Valid:
1pm AST Sep 19, 2026-6pm AST Sep 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation