Marine Weather and Tide Forecast for Aguas Claras, PR

.Short Term(This evening through Friday)...
Issued at 115 PM AST Wed Jun 17 2026

A relatively dry and stable air mass will keep weather conditions generally quiet across Puerto Rico and the U.S. Virgin Islands through tonight. However, strong daytime heating, combined with local effects, will still trigger scattered afternoon showers and isolated thunderstorms, primarily over portions of the interior and western Puerto Rico, where brief heavy rain could cause minor ponding on roads. Additionally, breezy easterly winds and dry conditions will maintain an elevated fire weather risk across the southern coastal plains of Puerto Rico. As of 1 PM AST, daytime highs were in the mid-80s to low 90s across all the islands, with heat indices in the mid-to upper 90s.

Moisture will increase noticeably on Thursday as a weak tropical wave moves into the region. Precipitable water values are forecast to rise to around 1.75 inches, leading to greater coverage of showers and thunderstorms. Passing showers will affect windward coasts and the U.S. Virgin Islands during the morning, followed by stronger convection over the interior and western PR in the afternoon. The main impacts expected from this activity are localized urban and small stream flooding, slippery roads, and gusty winds.

A sharp drying trend takes hold on Friday as the tropical wave exits and a dense layer of Saharan dust spreads across the region through the morning hours. Precipitable water will drop significantly below seasonal averages, to around 1.40 inches, and combined with the Saharan Air Layer suppressing deep, organized convection and limiting rainfall across the islands. The primary hazard will transition to widespread hazy skies, reduced horizontal visibility, and degraded air quality, which may affect individuals with respiratory sensitivities. Breezy conditions will prevail through the short-term period in response to a building surface high pressure over the central Atlantic.

.Long Term(Saturday through next Tuesday)...
Issued at 300 AM AST Wed Jun 17 2026

Over the weekend, a broad surface high-pressure system over the central Atlantic will maintain a typical easterly trade wind pattern across the northeastern Caribbean. A relatively dry air mass and intermittent intrusions of Saharan dust will support generally stable weather conditions, hazy skies at times, and warm to locally hot daytime temperatures. Passing showers embedded within the trade wind flow will continue, mainly across windward areas, but rainfall accumulations are expected to remain light.

By early to mid next week, moisture associated with a tropical wave will increase across the region, resulting in a more humid and unsettled pattern. This will support periods of showers and isolated thunderstorms, especially during the afternoon hours across portions of western and interior Puerto Rico. While a few locally heavy showers cannot be ruled out, widespread hazardous weather is not expected.

Thereafter, a gradual return to a drier air mass is expected as the Atlantic ridge reestablishes a typical trade wind pattern.
This will favor generally fair and warm conditions with passing showers embedded in the easterly flow and limited afternoon convection.

The primary hazards through the long-term period will include periods of elevated heat, occasional Saharan dust intrusions, strengthening trade winds at times, and localized impacts from isolated showers and thunderstorms.

AVIATION
(18Z TAFS)
Issued at 115 PM AST Wed Jun 17 2026

Mainly VFR conditions expected to prevail across all terminals through the forecast period. However, SHRA and iso TSRA expected to develop over western PR thru 17/22z, this may cause brief MVFR conds at TJBQ. The 17/12z TJSJ sounding indicated ESE winds up to 22 kt blo FL080. A tropical wave will increase SHRA with possible -TSRA around 18/15z across the USVI terminals, with similar conditions spreading gradually across the PR terminals through Thursday evening.

MARINE
Issued at 115 PM AST Wed Jun 17 2026

A broad surface high pressure building over the Central Atlantic will promote moderate to locally fresh E-ESE winds for the next several days, resulting in choppy seas across local waters and Caribbean passages that could lead to hazardous conditions for small craft. Shower activity will gradually increase by Thursday morning into Friday, as a tropical wave approaches the Caribbean Basin, leading to localized heavy rainfall, gusty winds, and reduced visibility. A dense layer of Saharan Dust will gradually filter into the region by late Thursday, bringing hazy skies, reduced visibility, and poor air quality through Saturday.

BEACH FORECAST
Issued at 115 PM AST Wed Jun 17 2026

The low risk of rip currents continues tonight across the islands, though beachgoers should stay aware of beach conditions as life- threatening rip currents can occur in the vicinity of groins, jetties, reefs, and piers. As winds gradually strengthen tonight, the risk should become moderate and spread across most beaches of the islands through Father’s Day weekend. Though the risk should remain moderate, beachgoers must exercise caution as life- threatening rip currents are possible along the surf zone. Residents and visitors are encouraged to choose beaches with lifeguards and follow the flag warning system.

Besides rip currents, beachgoers should stay weather alert, as afternoon showers and isolated thunderstorms can be expected for the rest of the workweek and possibly on Father’s Day weekend, which may move over coastal areas of Puerto Rico and bring wind gusts and lightning. Moderate concentrations of Saharan Dust will arrive by Thursday, resulting in hazy skies, reduced visibility, and poor air quality through Saturday.

FIRE WEATHER
Issued at 115 PM AST Wed Jun 17 2026

Critically dry soils, hot daytime temperatures, and a dry air mass will combine with sustained winds of 14 to 18 mph with stronger gusts to maintain an elevated fire weather risk through late this afternoon. The highest threat will remain concentrated across the southern coastal plains of Puerto Rico, where a Fire Danger Statement continues in effect through 4 PM AST. While a passing tropical wave will briefly introduce higher moisture and a chance for localized wetting rains on Thursday, any precipitation is expected to be localized and insufficient to provide widespread or lasting relief to the ongoing dry fuel conditions. Behind the wave on Friday, a quick return to a very dry, stable air mass with Saharan dust will cause relative humidity values to drop sharply once again, allowing the critical fire weather danger to persist through the end of the week. Outdoor burning and activities that could generate sparks should be strongly discouraged.

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