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: 6:44 pm AST Sep 30, 2022

Hazardous Weather Outlook
Tonight

Tonight: Scattered showers.  Mostly cloudy, with a low around 77. South southeast wind 5 to 8 mph.  Chance of precipitation is 40%.
Scattered
Showers

Lo 77 °F
Saturday

Saturday: Scattered showers, then showers and possibly a thunderstorm after noon.  High near 88. South southeast wind 5 to 11 mph.  Chance of precipitation is 90%. New rainfall amounts between 2 and 3 inches possible.
Scattered
Showers then
Showers
Hi 88 °F
Saturday
Night
Saturday Night: Scattered showers, mainly before 9pm.  Partly cloudy, with a low around 76. South southeast wind around 6 mph.  Chance of precipitation is 30%.
Scattered
Showers

Lo 76 °F
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 102. East southeast wind 5 to 11 mph.  Chance of precipitation is 70%.
Isolated
Showers then
Showers
Likely
Hi 89 °F
Sunday
Night
Sunday Night: Scattered showers.  Mostly cloudy, with a low around 77. Light south southeast wind.  Chance of precipitation is 50%.
Scattered
Showers

Lo 77 °F
Monday

Monday: Scattered showers and thunderstorms.  Partly sunny, with a high near 89. East wind 5 to 8 mph.  Chance of precipitation is 40%.
Scattered
Showers

Hi 89 °F
Monday
Night
Monday Night: Scattered showers.  Mostly cloudy, with a low around 77. East southeast wind 5 to 7 mph.  Chance of precipitation is 50%.
Scattered
Showers

Lo 77 °F
Tuesday

Tuesday: Scattered showers, mainly before noon.  Mostly sunny, with a high near 89. Light east wind increasing to 5 to 10 mph in the morning.  Chance of precipitation is 30%.
Scattered
Showers then
Mostly Sunny
Hi 89 °F
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 77. East wind around 7 mph.
Partly Cloudy

Lo 77 °F

National Weather Service Forecast Details

 

GRLevel3 radar images are not available at this time.

Day 1 rainfall

Day 2 rainfall

Day 3 rainfall

000
AWCA82 TJSJ 302037
RWSPR
PRZ001>013-010845-

Weather Summary for Puerto Rico
National Weather Service San Juan PR
437 PM AST Fri Sep 30 2022

Mostly sunny to partly cloudy skies prevailed today, and
cloudiness increased by mid-morning into the afternoon, leaving
mostly cloudy skies in some areas. The winds were from the south
at ten mph or less, pushing tropical moisture over the islands.
Therefore, showers developed across the south, southeast, east,
interior, north, and northwest coast of Puerto Rico throughout the
day. At the moment of writing this summary, rainfall
accumulations were around an inch with isolated higher amounts up
to 2 inches. Maximum temperatures were on the coast and urban
areas in the upper 80s and low 90s.

An unstable weather pattern will persist across the islands
through the weekend due to the proximity of an upper-level trough
and abundant tropical moisture. Therefore, the chance for
precipitation and periods of moderate to heavy rain will be high
across the islands through the weekend. The southern coast will
likely observe shower activity during the overnight and morning,
and the interior and western sections during the afternoon.
Overnight low temperatures will dip into the low and mid-70s along
the coast and around the low 60s in mountains and valleys.

Mariners can expect seas between 1 and 3 feet across the Caribbean
Waters and between 3 and 5 feet across the Atlantic and Passages.
Mariners should exercise caution across the local waters,
especially during the afternoon, due to the possibility of
thunderstorm activity.

$$

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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Wind Shear Tendency

Sea Surface Temperatures

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