textproduct: San Juan

KEY MESSAGES

Issued at 227 AM AST Thu Oct 29 2026

* Another round of showers is expected this afternoon for the interior and western Puerto Rico, and portions of the San Juan metro area. Urban and small stream flooding may develop.

* Hot conditions will continue for Puerto Rico and the Virgin Islands. Users should look for shade and stay hydrated.

* Exceptionally high tides will continue today, with potential coastal flooding for vulnerable areas. The period of high tide is around noon.

* Unsettled weather conditions may develop on Saturday and Sunday. Users should stay tuned for further updates today and tomorrow.

Short Term(Today through Saturday)

Issued at 227 AM AST Thu Oct 29 2026

A few showers moved into the vicinity of the Virgin Islands and eastern Puerto Rico during the early morning hours. Otherwise, skies were mostly clear, except across western Puerto Rico. Temperatures cooled down to the low 80s in the Virgin Islands, the upper 70s or low 80s across coastal areas in Puerto Rico, and into the 60s for the Cordillera Central.

A low pressure area at the upper levels is currently located just to the southeast of Puerto Rico, while high pressure at all levels just to northeast of the islands maintain a southeasterly wind flow. The steering flow will stay from this direction, at speeds of 9 to 12 knots through at least Saturday. In the most recent satellite-derived precipitable water imagery, plenty of moisture is still evident over Hispaniola. Some of this moisture is still reaching the local islands, with a slot of drier air just east of the Lesser Antilles. Today, decent lapse rates, above normal moisture and diurnal heating should trigger another round of showers and thunderstorms for the interior and west of Puerto Rico. Lines of showers could also reach the San Juan metropolitan area. In these areas, the risk of urban and small stream flooding will be medium, while frequent lightning is also anticipated. Additional showers may also reach the Virgin Islands and eastern Puerto Rico, where flooding is not a concern at this time.Tomorrow, that slot of dry air will move in, limiting the potential for rain activity.

There could be some changes in the forecast for Saturday, especially late in the day. A deepening trough over the western Caribbean will pull moisture into the region. Conditions aloft could be favorable for an increase in showers and thunderstorms, especially late in the day and in the nighttime. The confidence in the forecast for this period is low at this time, since there are some discrepancies in the global models regarding this rain event. The users should stay tuned for any changes introduced in the forecast.

Temperatures will remain warmer than normal, with a level of heat that primarily affects individuals extremely sensitive, especially when outdoors without effective cooling or adequate hydration.

AVIATION

(06Z TAFS) Issued at 227 AM AST Thu Oct 29 2026

SHRA and TSRA expected this afternoon (17-22Z) for the Cordillera Central, and the vicinity of TJBQ and TJSJ. Periods of reduced VIS and low ceilings can be expected. Passing SHRA expected for the vicinity of USVI, but with little to no impact for terminals. Winds will persist from SE at 9-12 kts, with stronger gusts and sea breeze variations from 14-22Z.

BEACH FORECAST

Issued at 227 AM AST Thu Oct 29 2026

A high risk of rip currents (rip currents are likely in the surf zone) will be in effect through 1 PM AST this afternoon along the north-facing beaches of Puerto Rico and Culebra, becoming moderate thereafter as the northerly swell energy continues to decrease. Up to a moderate risk (rip currents are possible in the surf zone) will persist across the USVI. Additionally, spring tides, which contributed to elevated water levels during the past few days, are expected to persist through at least tomorrow, Friday. Consequently, even as the northerly swell subsides, ongoing coastal effects may be heightened at high tide, potentially resulting in localized flooding in susceptible, low- lying shorelines. Beachgoers are strongly urged to stay out of the water at beaches under a high risk of rip currents. Always observe posted warning signs, flags, and guidance provided by local authorities and lifeguards. Up to a moderate risk of rip currents is expected to persist Friday and into the weekend.

SJU WATCHES/WARNINGS/ADVISORIES

PR...High Rip Current Risk until 1 PM AST this afternoon for PRZ001- 002-005-008-010-012.

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