textproduct: San Juan

KEY MESSAGES

Issued at 419 AM AST Tue Nov 11 2025

* Mostly stable weather conditions for today and tomorrow, with only a few areas that would experience afternoon convection and a limited flood threat.

* From Saturday into Sunday, weather conditions will deteriorate as a frontal boundary approaches north of the islands.

* On Thursday into Friday, a long-period northerly swell will result in a high risk of rip currents along the north-facing beaches in PR and the USVI.

* The U.S. Virgin Islands will enjoy stable and fair weather conditions from today into Friday, with some passing showers in the early morning hours.

Short Term(Today through Thursday)

Issued at 419 AM AST Tue Nov 11 2025

A few showers were observed during the nighttime over the local waters, and occasionally reaching portions of eastern Puerto Rico and the Virgin Islands. However, rainfall accumulations were mostly light, and most of the area saw clear skies and temperatures in the 70s.

Generally stable conditions are expected to prevail through much of the workweek. At the upper levels, a ridge is centered just west of Puerto Rico. At the mid levels, the ridge is centered just to the northeast of the Caribbean. At the surface, high pressure is driving the trade winds from the southeast, at speeds just below 15 knots. In these winds, irregular patches of moisture, induced by an upper level trough located east of the Lesser Antilles, will reach the islands at times. This rain interruptions are expected to be brief, and flooding is not anticipated. Also, diurnal heating is expected to fire up showers in the northwest each afternoon, but rainfall accumulation are expected to be minimal as well.

Temperatures are expected to be a little warmer than normal, with highs mostly in the upper 80s, and lows in the 70s for coastal areas, and in the 60s in the mountains.

AVIATION

(06Z TAFS) Issued at 419 AM AST Tue Nov 11 2025

Mostly VFR conditions are expected to prevail through the forecast period. SHRA will move at times across the local terminals and surrounding waters, but impacts to operations are expected to be minimal to none. However, from 18-22Z, SHRA are expected in the vicinity of TJBQ, with periods of reduced VIS possible. Winds will be from the SE at 11-14 kts, with gusts around 20 kts, especially from 14-21Z.

MARINE

Issued at 419 AM AST Tue Nov 11 2025

A broad surface high pressure extending from the north into the Central Atlantic will maintain a moderate to locally fresh easterly wind flow across the regional waters. A north- northwesterly swell is forecast to arrive by Wednesday, increasing seas and producing hazardous marine conditions across the offshore Atlantic waters. Seas are expected to build to around 7 feet. Small Craft Advisories may be required later today or tomorrow.

SJU WATCHES/WARNINGS/ADVISORIES

PR...None. VI...None. AM...None.