textproduct: San Juan

KEY MESSAGES

Issued at 100 PM AST Wed Nov 26 2025

* Limited shower activity is expected across Puerto Rico and the U.S. Virgin Islands through at least the upcoming weekend.

* Breezy conditions are anticipated across the local islands; therefore, unsecured items could blow around.

* Wind-driven seas will result in choppy and hazardous marine conditions for small crafts.

* Life-threatening rip currents will remain possible across most beaches of Puerto Rico and the U.S. Virgin Islands during the next few days.

Short Term(This afternoon through Friday)

Issued at 100 PM AST Wed Nov 26 2025

Mostly sunny skies prevailed during the morning hours, becoming partly cloudy by the afternoon, particularly across western and southwestern Puerto Rico. Maximum temperatures ranged from the mid-80s to around 90 degrees across the lower elevations.

Although mid-level ridging is expected to build across the forecast area, it should weaken toward the end of the cycle as a polar trough and its associated frontal boundary move across the western Atlantic. At the surface, the pressure gradient is forecast to tighten as a broad surface high over the central tropical Atlantic strengthens, supporting a moderate to fresh east-northeast wind flow through the next few days. The latest guidance continues to suggest precipitable water values remaining below 1.75 inches and confined below 850 mb. Nevertheless, the surface high will continue to advect patches of moisture across the region at times.

As a result, a seasonable weather pattern will dominate the forecast cycle, with limited afternoon shower development across southwest Puerto Rico. Elsewhere, fair weather is expected to prevail, with a few passing showers possible across windward areas. Due to the tightening pressure gradient, breezy conditions are expected, ensuring quick-moving showers with little to no flood threat. High temperatures will continue to range from the mid-80s to around 90F across the lower elevations, while nighttime lows in the higher terrain may drop into the mid-60s.

LONG TERM...(Saturday through Wednesday)

Issued at 518 AM AST Wed Nov 26 2025

Generally breezy conditions are forecast to start the long term period, particularly Saturday to Monday as a surface high builds over the western to central Atlantic and tightens the pressure gradient. 925 mb wind speeds are forecast at high end normal to slightly above normal values during these days, with model guidance suggesting a decrease towards normal values Tuesday and Wednesday. By Tuesday and Wednesday a low pressure system will move out of the eastern US towards the Atlantic promoting a looser pressure gradient and promote more seasonal wind speeds. PWAT values will be at up to normal values (1.5 to 1.8 in) with patches of drier and slightly more humid air providing some variability. Patches of moisture will promote showers steered by east- northeast, becoming more northeasterly as the period progresses, flow to reach windward sectors of the islands at times and promote a chance of afternoon showers mainly over interior to SW PR. Model guidance suggests the Wednesday will be the most humid day with PWAT values at around 1.9 to 1.9 in, but uncertainty remains. Flooding risks are not forecast during the period but above mentioned showers can promote brief heavy downpours. 925 mb temperatures are forecast to remain at below normal to low end normal values for this time of the year.

AVIATION

(18Z TAFS) Issued at 100 PM AST Wed Nov 26 2025

VFR conditions will prevail at all TAF sites during the forecast cycle with VCSH possible at USVI and JSJ terminals. E to NE winds to continue at 15 to 20 knots with land breeze variation overnight.

MARINE

Issued at 100 PM AST Wed Nov 26 2025

A surface high pressure over the central Atlantic will yield moderate to locally fresh easterly winds over the next few days. Therefore, wind-driven seas will result in choppy and hazardous marine conditions for small crafts. Winds increasing once again the upcoming weekend.

BEACH FORECAST

Issued at 518 AM AST Wed Nov 26 2025

There is a moderate risk of rip currents for the northern exposed beaches of Puerto Rico, as well as for Culebra, Vieques and St. Croix. This evening the moderate risk of rip currents is forecast to spread towards eastern PR, southeastern PR, St. John and St. Thomas. By early tomorrow, areas of southern PR will also be under a moderate risk of rip currents. Up to a moderate risk of rip currents will continue during the rest of the week with localized areas possibly under a high risk of rip currents tomorrow night. Always check the beach forecast before heading out, and avoid swimming at beaches with a high risk of rip currents. For location-specific information, visit weather.gov/beach/sju.

SJU WATCHES/WARNINGS/ADVISORIES

PR...None. VI...None. AM...Small Craft Advisory from midnight tonight to noon AST Friday for AMZ711.