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: 3:54 am AST Oct 19, 2021

Hazardous Weather Outlook
This
Afternoon
This Afternoon: Isolated showers.  Mostly sunny, with a steady temperature around 85. East wind around 9 mph.  Chance of precipitation is 20%.
Isolated
Showers
Hi 85 °F
Tonight

Tonight: Scattered showers, mainly after 9pm.  Partly cloudy, with a low around 77. East wind 5 to 7 mph.  Chance of precipitation is 40%.
Scattered
Showers
Lo 77 °F
Wednesday

Wednesday: Scattered showers, then showers likely and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 88. East wind 6 to 11 mph.  Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Showers
Likely
Hi 88 °F
Wednesday
Night
Wednesday Night: Scattered showers and thunderstorms.  Mostly cloudy, with a low around 76. East wind around 8 mph.  Chance of precipitation is 50%.
Scattered
Showers
Lo 76 °F
Thursday

Thursday: Isolated showers.  Mostly sunny, with a high near 88. East wind 8 to 14 mph.  Chance of precipitation is 20%.
Isolated
Showers
Hi 88 °F
Thursday
Night
Thursday Night: Scattered showers.  Mostly cloudy, with a low around 76. East southeast wind around 9 mph.  Chance of precipitation is 40%.
Scattered
Showers
Lo 76 °F
Friday

Friday: Scattered showers, mainly before noon.  Mostly sunny, with a high near 88. East wind 9 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.
Scattered
Showers then
Mostly Sunny
Hi 88 °F
Friday
Night
Friday Night: Scattered showers.  Partly cloudy, with a low around 76. East wind around 10 mph.  Chance of precipitation is 30%.
Scattered
Showers
Lo 76 °F
Saturday

Saturday: Mostly sunny, with a high near 89. East wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Sunny

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 190829
RWSPR
PRZ001>013-192030-

Weather Summary for Puerto Rico
National Weather Service San Juan PR
429 AM AST Tue Oct 19 2021

Generally fair weather under clear to partly cloudy skies was seen
overnight, though with a few showers pushing onshore in windward
portions of the islands, mostly in the northeast. Rainfall amounts
over land remained relatively low, though radar estimates suggest
amounts to near half an inch locally. Overnight lows were in the mid
to upper 70s at lower elevations and in the upper 60s to low 70s at
higher elevations. Winds were generally light and variable.

Though there is slightly drier air over the region today, there
remains more than enough to support typical shower activity. Showers
and thunderstorms are expected over interior and southern Puerto
Rico. Slow-moving showers are likely to result in locally high
rainfall amounts, and there remains an enhanced risk of flooding
for affected areas. Temperatures are forecast to increase to the
mid 80s to near 90 at lower elevations and into the upper 70s at
higher elevations. Winds will be generally out of the east-
northeast to near 10 mph.

Marine conditions remain relatively tranquil, with seas generally 3
feet or less. Winds out of the east at 5 to 10 knots. There is a low
risk of rip currents across the local beaches during the day
today.

$$

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