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: 7:50 am AST Feb 8, 2025

Hazardous Weather Outlook
This
Afternoon
This Afternoon: Showers likely, mainly before 3pm.  Mostly cloudy, with a high near 85. East northeast wind around 17 mph, with gusts as high as 22 mph.  Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Showers
Likely

Hi 85 °F
Tonight

Tonight: Showers likely, mainly before 9pm.  Mostly cloudy, with a low around 73. East northeast wind around 11 mph.  Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
Showers
Likely

Lo 73 °F
Sunday

Sunday: Scattered showers, mainly after 3pm.  Mostly sunny, with a high near 85. East wind 11 to 16 mph, with gusts as high as 21 mph.  Chance of precipitation is 50%.
Scattered
Showers

Hi 85 °F
Sunday
Night
Sunday Night: Scattered showers, mainly after midnight.  Mostly cloudy, with a low around 73. East northeast wind around 11 mph.  Chance of precipitation is 50%.
Isolated
Showers then
Scattered
Showers
Lo 73 °F
Monday

Monday: Scattered showers, mainly before noon.  Mostly sunny, with a high near 86. East northeast wind 11 to 17 mph, with gusts as high as 22 mph.  Chance of precipitation is 50%.
Scattered
Showers then
Isolated
Showers
Hi 86 °F
Monday
Night
Monday Night: Scattered showers.  Partly cloudy, with a low around 73. East wind around 11 mph.  Chance of precipitation is 40%.
Scattered
Showers

Lo 73 °F
Tuesday

Tuesday: Scattered showers.  Partly sunny, with a high near 85. East wind 11 to 14 mph.  Chance of precipitation is 50%.
Scattered
Showers

Hi 85 °F
Tuesday
Night
Tuesday Night: Scattered showers.  Partly cloudy, with a low around 73. East wind around 10 mph.  Chance of precipitation is 30%.
Scattered
Showers

Lo 73 °F
Wednesday

Wednesday: Mostly sunny, with a high near 85. East wind 10 to 16 mph, with gusts as high as 21 mph.
Mostly Sunny

Hi 85 °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

984
FXCA62 TJSJ 081458
AFDSJU

Area Forecast Discussion
National Weather Service San Juan PR
1058 AM AST Sat Feb 8 2025

.UPDATE...
Trade wind showers were observed through the morning hours across
the USVI, Vieques, Culebra, and most of eastern and northern PR.
Some showers made it further inland over central PR due to the
strong trades. The Doppler radar estimated around half an inch of
rain over el Yunque area since midnight. Max wind gusts were
between 25 and 31 mph. Temperatures were in the low 80s across
the lower elevations as of 10:30 AM. Breezy conditions and scattered
showers will continue through the rest of the day across the
islands.


.AVIATION...

(12Z TAFS)

Mainly VFR expected...except in brief MVFR cigs at FL025-FL030 due
to quick trade wind SHRA across the USVI terminals and TJSJ thru
the fcst period. The latest 08/12z TJSJ upper air sounding indicated
ENE winds at 11-22 kts blo 2500 ft.


&&

.FIRE WEATHER...

As of 10:30 AM, RAWS stations across SW PR were indicating RH`s
between 52%-63% and wind speeds at less than 10 mph in the
southern coastal plains under a weak southerly sea breeze, and a
max gust of 17 mph in Maricao. Although cloudiness and quick
moving showers are increasing along portions of the Cordillera,
conditions could become briefly favorable for the spread of
wildfires across SW PR before the onset of afternoon shallow
convection.


&&

.PREV DISCUSSION... /issued 453 AM AST Sat Feb 8 2025/

SYNOPSIS...

Variable weather conditions will continue throughout the weekend across
the local islands. Breezy to locally windy conditions will also
persist. Hazardous marine conditions will persist due to wind-
driven seas creating choppy conditions across most exposed waters
and local passages. For the next few days, dry and breezy
conditions in combination with low humidity will result in
favorable conditions for fire spread today.

SHORT TERM...Today through Monday...

A variable weather pattern prevailed across the region, bringing
periods of shower activity that mainly affected the north and
northeastern parts of Puerto Rico. Breezy conditions accompanied the
passing showers, under a steady 15-20 kt east-northeast wind flow.
Despite the occasional rainfall, temperatures remained seasonable,
with overnight lows ranging from the low to mid-70s across coastal
and lower elevation areas, while higher elevations experienced
cooler conditions, with temperatures dipping into the low 60s.

A mid-level ridge will continue to dominate the region through the
weekend, with a brief weakening expected from tonight into Sunday
due to a frontal boundary well north of the region moving eastward
into the northeastern Atlantic. This scenario will maintain moderate
to fresh east-northeast winds, promoting breezy conditions with
sustained winds in the range of 15 to 20 mph and gusty winds up to
30 mph. Given the expected conditions, the sea breeze influence will
not be significant. In terms of moisture levels, low-level moisture
will be the main factor for shower development, with PWAT values
ranging between 1.2 to 1.4 inches. As a result, showery conditions
will persist across Puerto Rico and the U.S. Virgin Islands.
However, these fast-moving showers are not expected to cause
significant flooding. The most frequent rainfall activity will favor
the north-central, northeast, and east-coastal regions of Puerto
Rico, though the probability of exceeding 0.5 inches of daily
accumulation remains low at around 30%.

Similar weather conditions are expected on Monday, with an east-
northeast flow continuing across the islands due to the influence of
a broad surface high-pressure system extending from the western
Atlantic into the central Atlantic. Therefore, a similar weather
pattern will persist, with showers likely during the early morning
and evening hours.

LONG TERM...Tuesday through Saturday...

A surface high pressure extending across the northern Atlantic, will
be the most dominant feature for the long term period. The presence
of the surface high will maintain a tight pressure gradient,
therefore, promoting breezy to windy conditions through the end of
the period. Windy conditions, will promote fast moving patches of
moisture reaching the islands, resulting in quick passing showers
mainly across eastern and northern Puerto Rico and the U.S. Virgin
Islands.

Precipitable water content values are expected to remain slightly
below normal in the range between 1.3 and 1.5 inches. A mid-level
ridge will maintain stable and dry conditions most of the week. At
this moment, no significant shower activity is anticipated. By the
end of the period into the weekend, a mid-to-upper level trough will
increase instability across the area. Under this pattern, and
increase in rainfall activity is likely over the islands. Seasonal
temperatures will remain across the region with highs in the low to
mid 80s along the coastal and urban areas of Puerto Rico and the
U.S. Virgin Islands. In addition, lows will remain in the range from
the low to mid 70s across the coastal areas, and from the low to mid
60s in the higher elevations.

AVIATION...

(06Z TAFS)

Mainly VFR conditions are expected to prevail across all terminals
during the next 24 hours. However, trade wind -RA to SHRA will
continue to move at times across east located terminals through
during the period. Winds will continue from the ENE at 10 knots or
less, increasing 15-20 kt aft 08/13Z across all sites.

MARINE...

A surface high pressure over the central Atlantic will maintain
moderate to fresh east to northeast winds. This conditions will
persist over the next few days resulting in choppy seas across most
local waters and hazardous conditions for small craft, particularly
across the offshore Atlantic waters and local Caribbean passages.

BEACH FORECAST...

There is a moderate risk of rip currents across most beaches in
Puerto Rico and the U.S. Virgin Islands. Some localized exposed
beaches along the north and northeast coasts may present a higher
threat due to bathymetric features or jetties along the shore.
Beachgoers are urged to visit designated swimming areas along the
exposed northern coasts of Puerto Rico and the U.S. Virgin
Islands.

&&

.SJU WATCHES/WARNINGS/ADVISORIES...
PR...None.
VI...None.
AM...Small Craft Advisory until midnight AST Sunday night for AMZ711-
     723.

&&

$$

SHORT TERM...DS
LONG TERM....GRS
AVIATION...DS

NWS SJU Office Area Forecast Discussion

Saharan Air Layer

Wind Shear Tendency

Sea Surface Temperatures

Sea Surface Temperatures Anomalies

200hPa Velocity Potential Forecast