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: 3:25 pm AST Jun 18, 2021

Hazardous Weather Outlook
Tonight

Tonight: Isolated showers.  Partly cloudy, with a low around 77. East southeast wind around 16 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.
Isolated
Showers
Lo 77 °F
Saturday

Saturday: Scattered showers, mainly after 4pm.  Mostly sunny, with a high near 89. East wind 15 to 17 mph, with gusts as high as 22 mph.  Chance of precipitation is 30%.
Scattered
Showers
Hi 89 °F
Saturday
Night
Saturday Night: Scattered showers, mainly after 1am.  Partly cloudy, with a low around 76. East wind 14 to 16 mph, with gusts as high as 21 mph.  Chance of precipitation is 30%.
Scattered
Showers
Lo 76 °F
Sunday

Sunday: Scattered showers, then showers likely and possibly a thunderstorm after 1pm.  Increasing clouds, with a high near 89. East wind around 13 mph.  Chance of precipitation is 70%.
Showers
Likely
Hi 89 °F
Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms after 7pm.  Mostly cloudy, with a low around 78. East southeast wind 10 to 13 mph.  Chance of precipitation is 60%.
Showers
Likely
Lo 78 °F
Monday

Monday: Scattered showers, with thunderstorms also possible after 1pm.  Partly sunny, with a high near 90. East southeast wind around 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 50%.
Scattered
Showers
Hi 90 °F
Monday
Night
Monday Night: Scattered showers.  Mostly cloudy, with a low around 78. East wind around 11 mph.  Chance of precipitation is 40%.
Scattered
Showers
Lo 78 °F
Tuesday

Tuesday: Scattered showers.  Mostly sunny, with a high near 89. East wind 13 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.
Scattered
Showers
Hi 89 °F
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 77. East wind around 10 mph.
Partly Cloudy
Lo 77 °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 182102
RWSPR
PRZ001>013-190915-

Weather Summary for Puerto Rico
National Weather Service San Juan PR
502 PM AST Fri Jun 18 2021

Variably cloudy skies were observed across Puerto Rico today.
Scattered showers were observed across northern and eastern Puerto
Rico in the morning, leaving up to a half an inch of rain in some
areas. In the afternoon, showers and isolated thunderstorms
affected portions of central and northwestern Puerto Rico, leaving
1 to 2 inches of rain in some areas. The daytime high temperatures
were in the upper 80s to low 90s across the lower elevations,
while the higher elevations observed temperatures in the low to
mid 80s.

Dry and stable air mass will be moving in tonight. There will also
be some Saharan dust, which will cause some haze. Therefore,
mainly fair weather is expected overnight, with the exception of
eastern Puerto Rico, where brief showers are forecast. The
overnight low temperatures will be in the mid to upper 70s across
the lower elevations, and in the mid 60s to low 70s across the
higher elevations.

Seas of up to 6 feet and winds up to 20 knots are expected
tonight. Therefore, small craft operators are urged to exercise
caution. There is a moderate risk of rip currents for most of the
local beaches, but there is a low risk of rip currents for the
beaches of western Puerto Rico.

$$

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

Saharan Air Layer

Wind Shear Tendency

Sea Surface Temperatures

Sea Surface Temperatures Anomalies