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

Isaias to Bring Tropical Impacts Across to the East Coast

Isaias is forecast to make landfall tonight in the Carolinas with dangerous storm surge, flash flooding, damaging winds, and isolated tropical tornadoes. Isaias may strengthen briefly prior to landfall, but the impacts will be the same regardless of the categorical definition. Isaias impacts will be felt all along the East Coast as Isaias moves northward through mid-week. Read More >

Hazardous Weather Conditions

Current conditions at

San Juan, Luis Munoz Marin International Airport (TJSJ)

Lat: 18.45°NLon: 66°WElev: 10ft.

A Few Clouds

84°F

29°C

Humidity 84%
Wind Speed E 12 mph
Barometer 30.03 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 3 Aug 7:56 pm AST
Extended Forecast for

San Juan PR

  • Tonight

    Tonight: Scattered showers. Mostly cloudy, with a low around 78. East wind 7 to 9 mph. Chance of precipitation is 40%.

    Scattered
    Showers

    Low: 78 °F

  • Tuesday

    Tuesday: Scattered showers, mainly between 9am and noon. Mostly sunny, with a high near 92. Heat index values as high as 103. East wind 9 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Scattered
    Showers

    High: 92 °F

  • Tuesday
    Night

    Tuesday Night: Isolated showers. Partly cloudy, with a low around 78. East southeast wind 8 to 11 mph. Chance of precipitation is 20%.

    Isolated
    Showers

    Low: 78 °F

  • Wednesday

    Wednesday: Isolated showers. Mostly sunny, with a high near 88. East wind 11 to 14 mph. Chance of precipitation is 20%.

    Isolated
    Showers

    High: 88 °F

  • Wednesday
    Night

    Wednesday Night: Scattered showers. Partly cloudy, with a low around 77. East southeast wind 9 to 11 mph. Chance of precipitation is 30%.

    Scattered
    Showers

    Low: 77 °F

  • Thursday

    Thursday: Isolated showers. Mostly sunny, with a high near 89. East wind 8 to 13 mph. Chance of precipitation is 20%.

    Isolated
    Showers

    High: 89 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 77. East southeast wind 7 to 9 mph.

    Partly Cloudy

    Low: 77 °F

  • Friday

    Friday: Scattered showers, mainly after noon. Mostly sunny, with a high near 90. East wind 13 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Mostly Sunny
    then
    Scattered
    Showers

    High: 90 °F

  • Friday
    Night

    Friday Night: Scattered showers. Mostly cloudy, with a low around 79. East southeast wind 8 to 10 mph. Chance of precipitation is 40%.

    Scattered
    Showers

    Low: 79 °F

Detailed Forecast

Tonight
Scattered showers. Mostly cloudy, with a low around 78. East wind 7 to 9 mph. Chance of precipitation is 40%.
Tuesday
Scattered showers, mainly between 9am and noon. Mostly sunny, with a high near 92. Heat index values as high as 103. East wind 9 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tuesday Night
Isolated showers. Partly cloudy, with a low around 78. East southeast wind 8 to 11 mph. Chance of precipitation is 20%.
Wednesday
Isolated showers. Mostly sunny, with a high near 88. East wind 11 to 14 mph. Chance of precipitation is 20%.
Wednesday Night
Scattered showers. Partly cloudy, with a low around 77. East southeast wind 9 to 11 mph. Chance of precipitation is 30%.
Thursday
Isolated showers. Mostly sunny, with a high near 89. East wind 8 to 13 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 77. East southeast wind 7 to 9 mph.
Friday
Scattered showers, mainly after noon. Mostly sunny, with a high near 90. East wind 13 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday Night
Scattered showers. Mostly cloudy, with a low around 79. East southeast wind 8 to 10 mph. Chance of precipitation is 40%.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Scattered showers. Mostly cloudy, with a low around 78. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Scattered showers. Partly cloudy, with a low around 78. Chance of precipitation is 30%.
Monday
Scattered showers. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
San Juan PR
 18.41°N 66.08°W (Elev. 16 ft)
Last Update:
3:59 pm AST Aug 3, 2020
Forecast Valid:
8pm AST Aug 3, 2020-6pm AST Aug 10, 2020
 
Forecast Discussion
 
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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