Since 2001 providing the latest information on tropical cyclone activity in the Atlantic Basin and the weather conditions in Puerto Rico.

Local Weather Conditions

 

National Weather Service Today's Weather Impact Levels

National Weather Service Forecast for: San Juan, Puerto Rico  

Updated: 7:32 am AST Sep 24, 2021

Hazardous Weather Outlook
Today

Today: Isolated showers, then scattered showers and thunderstorms after 3pm.  Mostly sunny, with a high near 94. Heat index values as high as 103. East wind 5 to 7 mph.  Chance of precipitation is 30%.
Scattered
Showers

Hi 94 °F
Tonight

Tonight: Isolated showers after 9pm.  Mostly clear, with a low around 79. Light south wind.  Chance of precipitation is 20%.
Isolated
Showers

Lo 79 °F
Saturday

Saturday: Isolated showers.  Mostly sunny, with a high near 93. Heat index values as high as 103. Light and variable wind becoming east northeast 5 to 9 mph in the morning.  Chance of precipitation is 20%.
Isolated
Showers

Hi 93 °F
Saturday
Night
Saturday Night: Isolated showers.  Partly cloudy, with a low around 77. East wind 5 to 7 mph becoming north after midnight.  Chance of precipitation is 20%.
Isolated
Showers

Lo 77 °F
Sunday

Sunday: Scattered showers and thunderstorms.  Partly sunny, with a high near 91. Light and variable wind becoming east northeast 5 to 9 mph in the morning.  Chance of precipitation is 40%.
Scattered
Showers

Hi 91 °F
Sunday
Night
Sunday Night: Isolated showers.  Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph.  Chance of precipitation is 20%.
Isolated
Showers

Lo 77 °F
Monday

Monday: Scattered showers, mainly after noon.  Mostly sunny, with a high near 88. East wind 5 to 9 mph.  Chance of precipitation is 30%.
Mostly Sunny
then
Scattered
Showers
Hi 88 °F
Monday
Night
Monday Night: Partly cloudy, with a low around 77. East southeast wind around 7 mph.
Partly Cloudy

Lo 77 °F
Tuesday

Tuesday: Scattered showers, mainly before noon.  Mostly sunny, with a high near 90. East wind 6 to 9 mph.  Chance of precipitation is 30%.
Scattered
Showers then
Mostly Sunny
Hi 90 °F

National Weather Service Forecast Details

 

GRLevel3 Radar

  [10/10
GRLevel3 radar from NWS station TJUA

Day 1 rainfall

Day 2 rainfall

Day 3 rainfall

000
AWCA82 TJSJ 240831
RWSPR
PRZ001>013-242045-

Weather Summary for Puerto Rico
National Weather Service San Juan PR
431 AM AST Fri Sep 24 2021

Generally tranquil conditions with mostly clear to partly cloudy
skies were observed across the islands throughout the night. A few
showers and isolated thunderstorms developed over the Atlantic
waters but remained offshore all night. Temperatures dropped into
the upper 70s to low 80s with light and variable winds.

It will be another hot day across Puerto Rico. Temperatures are
expected to reach the low and mid-90s, with heat indices around
102 to 106 degrees, mainly over the urban and low-elevated areas
of the northern half. In the afternoon, due to local effects,
showers and isolated thunderstorms could develop over the interior
and north, with urban and small stream flooding possible. Winds
will be out of the south at 5 to 10 mph.

Across the local waters, seas up to 5 feet are expected with
winds up to 10 knots. There is a moderate rip current risk for the
northern half of Puerto Rico, including Culebra.

$$

This product is issued around 5 AM and 5 PM each day and weather
conditions may change between issuances. Please verify the status
of any Watches...Warnings or Advisories mentioned in this product.

NWS SJU Office Area Forecast Discussion

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