Marine Weather and Tide Forecast for Santo Domingo, PR

.Short Term(This evening through Sunday)...
Issued at 229 PM AST Fri May 15 2026

Mostly tranquil conditions have persisted this morning, with the exception of a few passing showers across the U.S. Virgin Islands and portions of eastern and southeastern Puerto Rico. Surface observations have registered east to southeast winds at around 10 to 15 mph, with peak gusts up to 20 mph near coastal areas. Daytime highs have generally ranged from the upper 80s to low 90s across urban and coastal areas of Puerto Rico and from the upper 70s to low 80s across higher elevations. Across the U.S. Virgin Islands, maximum temperatures have reached the mid to upper 80s. Heat indices have generally ranged from the mid 90s to around 100 to 105 degrees F.

This afternoon, expect the development of isolated to scattered diurnally induced showers across the northwestern quadrant of Puerto Rico, while streamers from El Yunque may bring some cloudiness or rain activity to the metro area. Rainfall accumulations are not expected to be significant, and the flood risk remains limited.

The dominant feature through Saturday will continue to be a mid to upper-level ridge, which will help limit widespread thunderstorm development and maintain similar conditions tomorrow. As a result, east to southeast winds will continue to transport patches of moisture across Puerto Rico and the U.S. Virgin Islands, resulting in periods of showery weather with moderate to locally heavy rainfall at times. During the afternoon hours, local effects, sea breeze convergence, and daytime heating will once again support the development of showers across interior and western Puerto Rico.
Additionally, low concentrations of Saharan dust will remain present across the region during the short-term period. The highest concentrations are expected to stay south of the islands over the Caribbean Sea, although slight increases in hazy conditions are possible by Saturday.

By Sunday, the ridge is forecast to start weakening as a mid to upper- level trough approaches from the west. This will increase instability and improve the chances for thunderstorm development across the region. However, current model guidance indicates the presence of some drier air in the mid-levels of the atmosphere, which could help suppress convective activity.

Warm to hot conditions will remain one of the primary weather concerns. Current 925 mb temperature guidance indicates above-normal temperatures will persist throughout the short term period. Expect daytime highs in the upper 80s to lower 90s across coastal and urban areas with heat indices exceeding 100 degrees F during peak afternoon hours.

.Long Term(Monday through next Thursday)...
Issued at 403 AM AST Fri May 15 2026

A gradual transition toward a wetter weather pattern is expected across Puerto Rico and the U.S. Virgin Islands through the upcoming workweek. Surface high pressure over the western Atlantic will maintain easterly winds early in the period, gradually veering east- southeasterly by midweek while weakening from fresh to strong speeds to more moderate to locally fresh conditions late in the week.
Although moisture levels early in the period should remain near to slightly below seasonal normals, patches of deeper tropical moisture moving across the region will continue to promote passing showers across eastern Puerto Rico and the U.S. Virgin Islands during the overnight and morning hours, followed by afternoon convection across western Puerto Rico.

At upper levels, model guidance continues to indicate an amplifying trough north of the northeastern Caribbean, with marginally cooler mid-level temperatures gradually spreading closer to the local islands through mid to late week. At the same time, mid-level conditions are forecast to become less dry, allowing for a somewhat more favorable environment for shower development. As precipitable water values gradually increase to near and occasionally above normal levels, shower activity is expected to become more frequent by Wednesday and Thursday, particularly across western and northwestern Puerto Rico and portions of the San Juan metropolitan area. Although thunderstorms were not explicitly introduced into the forecast at this time, excessive diurnal heating combined with the more favorable thermodynamic environment may support one or two very isolated thunderstorms during the afternoon hours. Hazard risks remain at medium confidence, primarily associated with localized excessive rainfall and excessive heat, as warm to hot daytime temperatures and elevated humidity levels will likely continue through much of the period.

AVIATION
(18Z TAFS)
Issued at 229 PM AST Fri May 15 2026

VFR conditions are expected across all TAF terminals. TJBQ may observe VCSH/SHRA thru 15/22Z. Winds will remain from E-SE around 10 to 15 kts with occasional higher gusts, becoming light and variable overnight. VCSH over TIST and TISX are possible during the overnight period. From 16/14Z, winds are expected to increase again and VCTS/TSRA are possible across TJBQ aft 16/17Z.

MARINE
Issued at 229 PM AST Fri May 15 2026

A broad surface high-pressure over the central Atlantic will continue to promote moderate to locally fresh east to east- southeasterly winds across the regional waters. These conditions will maintain choppy seas across the offshore Atlantic and Caribbean waters during the next several days. Seas are forecast to remain between 4 and 5 feet, occasionally up to 6 feet, through early next week.

BEACH FORECAST
Issued at 229 PM AST Fri May 15 2026

A moderate rip current risk is expected to prevail through the middle of next week along the northern and eastern beaches of PR, as well as Culebra, Vieques, and the US Virgin Islands. Beachgoers are encouraged to continue exercising caution especially near piers and unprotected beaches, as life-threatening rip currents are possible in the area.

SJU WATCHES/WARNINGS/ADVISORIES
PR...None.
VI...None.
AM...None.