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: 5:35 am AST May 28, 2023

Hazardous Weather Outlook
This
Afternoon
This Afternoon: Scattered showers and thunderstorms.  Partly sunny, with a high near 89. East wind around 14 mph, with gusts as high as 20 mph.  Chance of precipitation is 50%.
Scattered
Showers

Hi 89 °F
Tonight

Tonight: Scattered showers.  Mostly cloudy, with a low around 77. East southeast wind 6 to 9 mph.  Chance of precipitation is 50%. New precipitation amounts between a quarter and half of an inch possible.
Scattered
Showers

Lo 77 °F
Memorial
Day
Memorial Day: Scattered showers, with thunderstorms also possible after 3pm.  Partly sunny, with a high near 88. East wind 7 to 16 mph, with gusts as high as 24 mph.  Chance of precipitation is 50%. New rainfall amounts between a half and three quarters of an inch possible.
Scattered
Showers

Hi 88 °F
Monday
Night
Monday Night: Scattered showers.  Mostly cloudy, with a low around 78. East southeast wind 6 to 9 mph.  Chance of precipitation is 40%.
Scattered
Showers

Lo 78 °F
Tuesday

Tuesday: Showers likely, mainly before noon.  Mostly cloudy, with a high near 90. East southeast wind 9 to 16 mph, with gusts as high as 24 mph.  Chance of precipitation is 60%.
Showers
Likely

Hi 90 °F
Tuesday
Night
Tuesday Night: Scattered showers and thunderstorms.  Mostly cloudy, with a low around 77. East southeast wind 7 to 10 mph.  Chance of precipitation is 50%.
Scattered
Showers

Lo 77 °F
Wednesday

Wednesday: Mostly sunny, with a high near 90. East southeast wind 8 to 17 mph, with gusts as high as 22 mph.
Mostly Sunny

Hi 90 °F
Wednesday
Night
Wednesday Night: Clear, with a low around 79. East southeast wind 7 to 9 mph.
Clear

Lo 79 °F
Thursday

Thursday: Scattered showers, mainly after noon.  Mostly sunny, with a high near 89. East southeast wind 10 to 17 mph, with gusts as high as 22 mph.  Chance of precipitation is 40%.
Mostly Sunny
then
Scattered
Showers
Hi 89 °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 280800
RWSPR
PRZ001>013-282200-

Weather Summary for Puerto Rico
National Weather Service San Juan PR
400 AM AST Sun May 28 2023

A moist plume streaming across the region caused increased cloud
cover and brought showers with isolated thunderstorms to eastern
and southern sections of Puerto Rico. Through 4 AM AST, radar-
estimated rainfall accumulations have peaked between two to three
inches in Guayama and neighboring municipalities. Elsewhere, fair
weather conditions under partly cloudy skies prevailed. Overnight
minimum temperatures range from around 66 degrees across the
higher elevations to about 79 degrees across the lower elevations
of northeastern Puerto Rico. Winds were generally calm to light
from the east-southeast but variable further inland.

As the moist plume continues to stream across the region, showers
with isolated thunderstorms will continue to affect the eastern
and southern sections of the island this morning. As the day
progresses, the shower and thunderstorm activity will shift to
land areas, aided by local effects and diurnal heating, clustering
along the northwestern quadrant of the island. Moderate to
locally heavy rains could result in flooding impacts, including
localized flash flooding. Elsewhere, showers are still possible
but with lower rainfall totals and potential risks, mainly
downwind from El Yunque and the local islands. Daytime maximum
temperatures will peak into the lower 90s across lower elevations
and other urban areas, with heat indices likely exceeding 102
degrees. Winds will become more east-southeasterly at 10-15 mph
with higher gusts and sea breeze variations.

Across the local waters, mariners can expect seas up to 5 feet and
east-to-southeast winds up to 15 knots. For beachgoers, life-
threatening rip currents are possible across northern and eastern
Puerto Rico and Culebra beaches.

$$

The last Weather Summary for the Puerto Rico will be issued on
Wednesday, May 31, 2023. To stay updated on the weather in Puerto
Rico, please check the Areal Forecast Discussion (AFDSJU) and the
Hazardous Weather Outlook (HWOSJU).

NWS SJU Office Area Forecast Discussion

Saharan Air Layer

Wind Shear Tendency

Sea Surface Temperatures

Sea Surface Temperatures Anomalies