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National Weather Service Forecast for: San Juan PR
Issued by: National Weather Service San Juan, PR
Updated: 5:34 am AST Jun 22, 2018

San Juan
 
Today

Today: Isolated showers, then showers and possibly a thunderstorm after noon.  High near 88. East southeast wind around 10 mph.  Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Isolated
Showers then
Showers
Tonight

Tonight: Isolated showers, then scattered showers and thunderstorms after midnight.  Mostly cloudy, with a low around 75. East southeast wind 7 to 11 mph.  Chance of precipitation is 50%.
Isolated
Showers then
Scattered
Showers
Saturday

Saturday: Isolated showers, then showers likely and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 89. East wind 10 to 13 mph.  Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.
Isolated
Showers then
Showers
Likely
Saturday
Night
Saturday Night: Scattered showers.  Mostly cloudy, with a low around 77. East wind around 10 mph.  Chance of precipitation is 50%.
Scattered
Showers

Sunday

Sunday: Scattered showers, with thunderstorms also possible after noon.  Partly sunny, with a high near 89. East wind 13 to 16 mph, with gusts as high as 21 mph.  Chance of precipitation is 50%.
Scattered
Showers

Sunday
Night
Sunday Night: Isolated showers.  Partly cloudy, with a low around 78. East wind around 13 mph.  Chance of precipitation is 20%.
Isolated
Showers

Monday

Monday: Mostly sunny, with a high near 90. East wind around 16 mph, with gusts as high as 21 mph.
Mostly Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 78. East wind around 11 mph.
Partly Cloudy

Tuesday

Tuesday: Sunny, with a high near 91. East wind 11 to 14 mph.
Sunny

Hi 88 °F Lo 75 °F Hi 89 °F Lo 77 °F Hi 89 °F Lo 78 °F Hi 90 °F Lo 78 °F Hi 91 °F

Hazardous Weather Outlook
 

Today
 
Isolated showers, then showers and possibly a thunderstorm after noon. High near 88. East southeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Tonight
 
Isolated showers, then scattered showers and thunderstorms after midnight. Mostly cloudy, with a low around 75. East southeast wind 7 to 11 mph. Chance of precipitation is 50%.
Saturday
 
Isolated showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 89. East wind 10 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.
Saturday Night
 
Scattered showers. Mostly cloudy, with a low around 77. East wind around 10 mph. Chance of precipitation is 50%.
Sunday
 
Scattered showers, with thunderstorms also possible after noon. Partly sunny, with a high near 89. East wind 13 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Sunday Night
 
Isolated showers. Partly cloudy, with a low around 78. East wind around 13 mph. Chance of precipitation is 20%.
Monday
 
Mostly sunny, with a high near 90. East wind around 16 mph, with gusts as high as 21 mph.
Monday Night
 
Partly cloudy, with a low around 78. East wind around 11 mph.
Tuesday
 
Sunny, with a high near 91. East wind 11 to 14 mph.
Tuesday Night
 
Mostly clear, with a low around 78.
Wednesday
 
Mostly sunny, with a high near 90.
Wednesday Night
 
Mostly clear, with a low around 77.
Thursday
 
Sunny, with a high near 91.

 

 

Weather Summary

000
AWCA82 TJSJ 220915
RWSPR

Weather Summary for Puerto Rico
National Weather Service San Juan PR
515 AM AST Fri Jun 22 2018

Partly cloudy skies prevailed across the forecast area early
this morning with some showers noted across the local waters.
Temperatures were in the mid to upper 70s under easterly winds
at 10 mph or less.

Unsettled weather conditions are expected to prevail this afternoon
into Saturday as an approaching tropical wave interacts with an
upper level trough. As the wave moves closer to the forecast area,
shower and thunder activity will increase across eastern Puerto
Rico late this morning, spreading across the western half of the
island in the afternoon. Although the shower and thunder activity
should decrease across the western half of the island by the late
evening hours, the chance for showers and thunderstorms across
the eastern half will continue overnight. Periods of heavy
rainfall will result in urban flooding as well as sharp rises
along small streams and rivers. Mudslides in areas of steep
terrain are likely, particularly across northwest Puerto Rico
where soils are already saturated.

Seas of 3 to 5 feet with winds of 15 to 20 knots are expected
across the local waters. Showers and thunderstorms will
increase across the local waters as a tropical wave moves across
the eastern Caribbean. Locally higher seas and winds likely in
thunderstorms.

$$

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.

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