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: 3:17 am AST Apr 15, 2021

Hazardous Weather Outlook
Tonight

Tonight: Clear, with a low around 74. East northeast wind 5 to 10 mph becoming south after midnight.
Clear

Lo 74 °F
Friday

Friday: Isolated showers, then scattered showers and thunderstorms after noon.  Increasing clouds, with a high near 89. Light and variable wind becoming east northeast 8 to 13 mph in the morning.  Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Isolated
Showers then
Scattered
Showers
Hi 89 °F
Friday
Night
Friday Night: Scattered showers.  Mostly cloudy, with a low around 74. Southeast wind around 8 mph.  Chance of precipitation is 40%.
Scattered
Showers

Lo 74 °F
Saturday

Saturday: Scattered showers, mainly after noon.  Mostly sunny, with a high near 91. East wind 9 to 11 mph.  Chance of precipitation is 40%.
Isolated
Showers then
Scattered
Showers
Hi 91 °F
Saturday
Night
Saturday Night: Isolated showers.  Partly cloudy, with a low around 76. Southeast wind around 8 mph.  Chance of precipitation is 10%.
Isolated
Showers

Lo 76 °F
Sunday

Sunday: Isolated showers.  Mostly sunny, with a high near 91. East southeast wind 10 to 14 mph.  Chance of precipitation is 10%.
Isolated
Showers

Hi 91 °F
Sunday
Night
Sunday Night: Partly cloudy, with a low around 73. East southeast wind around 9 mph.
Partly Cloudy

Lo 73 °F
Monday

Monday: Mostly sunny, with a high near 90. East wind 11 to 15 mph.
Mostly Sunny

Hi 90 °F
Monday
Night
Monday Night: Partly cloudy, with a low around 75. East southeast wind around 9 mph.
Partly Cloudy

Lo 75 °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 152112
RWSPR
PRZ001>013-160915-

Weather Summary for Puerto Rico
National Weather Service San Juan PR
512 PM AST Thu Apr 15 2021

An overall dry air mass lingered across the region today with mostly
sunny skies and fair weather conditions prevailing over much of the
islands. The exception was over the central interior of Puerto Rico
where some clouds and a few very light afternoon showers developed.
No significant rainfall was observed or reported so far today. Daytime
high temperatures were in the low to mid 80s along the coastal areas
and winds were generally from the northeast between 5 to 15 mph with
sea breeze variations.

Skies will be mostly clear to partly cloudy skies during the overnight
and early morning hours with limited or no shower activity expected
to affect the islands. Low temperatures will be from the high 50s to
low 60s across the higher elevations and in the low 70s across coastal
areas. Winds will be calm to light and variable overnight. For the
rest of the day on Friday, expect an increase in moisture across
the region during the late afternoon as fragments from an old frontal
boundary returns to the region as winds become more southeasterly.
This in turn will aid in the a development of afternoon showers
activity over portions of the islands.

Across the regional waters, seas will range between 1 to 5 feet
in general and winds between 10 to 15 knots from the northeast are
expected overnight. There is a moderate risk of rip currents for
the northern beaches of 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