Southern US Virgin Islands, Vieques and Eastern Puerto Rico out 10nm Marine Forecast
| Rest Of Today...Southwest Winds 5 To 10 Knots. Seas 1 To 3 Feet. Dominant Period 11 Seconds. Isolated Showers. |
| Tonight...West Winds 5 To 10 Knots. Seas 1 To 3 Feet. Dominant Period 10 Seconds. Isolated Showers. |
| Thursday...West Winds 5 To 10 Knots. Seas 2 To 4 Feet With Occasional Seas Around 5 Feet. Dominant Period 10 Seconds. Numerous Showers. |
| Thursday Night...North Winds 10 To 15 Knots. Seas 4 To 6 Feet With Occasional Seas Up To 8 Feet. Dominant Period 11 Seconds. Scattered Showers. |
| Friday...North Winds 10 To 15 Knots With Gusts Up To 25 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 11 Seconds. Isolated Showers. |
| Saturday...Southeast Winds 5 To 10 Knots. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 12 Seconds. Isolated Showers. |
| Sunday...South Winds 5 To 10 Knots, Becoming East. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 12 Seconds. |
| Area Forecast Discussion ...CORRECTED National Weather Service San Juan PR 455pm AST Sunday Nov 9 2025 .Short Term(This evening through Tuesday)... Issued at 443pm AST Sunday Nov 9 2025 Showers and a few thunderstorms have been affecting the eastern and southern half of Puerto Rico, as well as Culebra, Vieques, and the U.S. Virgin Islands most of today. These showers moved quickly across the region, producing wind gusts between 25 and 35 mph. Rainfall totals have ranged from 1 to 3 inches across the El Yunque area, northwestern and southern Puerto Rico, with localized amounts up to 4 inches in Ponce, Juana Diaz and Santa Isabel. Elsewhere, skies have been mostly cloudy with light passing showers. Morning temperatures stayed in the low to mid-80s due to cloud cover and rain. Satellite images show drier air moving into the U.S. Virgin Islands and eastern Puerto Rico early this afternoon. As the easterly wave moves away, weather conditions will improve, and showers will decrease by late afternoon and evening. By Monday, a ridge of high pressure will strengthen over the region, bringing more stable and dry weather. Moisture will drop to near one inch late Monday into Tuesday, and only brief showers are expected over eastern Puerto Rico and the U.S. Virgin Islands. A few afternoon showers may form over western Puerto Rico due to sea breeze convergence, but flooding risk will stay low. Tuesday looks to be the driest day of the period. The ridge will continue to dominate, keeping fair weather with moderate to breezy trade winds. Quick showers may move over windward areas overnight and early in the morning, followed by mostly sunny skies. Any afternoon showers will be brief and focused over interior and western Puerto Rico. .Long Term(Wednesday through next Saturday)... Issued at 300am AST Sunday Nov 9 2025 A mid to upper level ridge will prevail across the local islands through the forecast cycle, with some weakening anticipated toward the end of the period as a polar trough and its associated frontal boundary move across the western and central Atlantic. At the surface, a broad high-pressure system positioned northeast of the islands will maintain easterly winds through at least the end of the workweek. However, as the aforementioned surface front approaches the area, winds are expected to veer to east-southeast and become light and variable. Under the subsidence associated with the ridge aloft, precipitable water values are expected to remain below normal for much of the workweek. However, an increase in PW values (Precipitable Water values) is expected over the upcoming weekend as the ridge aloft weakens and the surface front moves closer to the local islands. As a result, a seasonable weather pattern is anticipated across Puerto Rico and the U.S. Virgin Islands, with a few passing showers affecting portions of eastern Puerto Rico, Culebra, Vieques, and the U.S. Virgin Islands during the nighttime and early morning hours, followed by limited afternoon convection across western and interior Puerto Rico. Additionally, seasonable temperatures will prevail, with daytime highs reaching the mid-to-upper 80s across coastal and lower-elevation areas. Overall, no significant weather threats are currently anticipated. However, the flooding potential may increase toward the end of the period due to moisture advection associated with the approaching frontal boundary. Marine Issued at 419pm AST Sunday Nov 9 2025 A surface high pressure over the north central Atlantic will promote moderate to locally fresh easterly winds for the next few days, small craft should exercise caution. An easterly wave will bring additional showers, and isolated thunderstorms this evening, mainly over the western offshore Atlantic waters and the Mona Passage. A north-northwesterly swell will bring hazardous marine conditions across the local waters and passages by midweek. Beach Forecast Issued at 119pm AST Sunday Nov 9 2025 A moderate risk of rip currents will continue to prevail across most of the shorelines of Puerto Rico and the U.S. Virgin Islands, with possible life-threatening rip currents in the surf zone. By midweek, a north-northwesterly swell will bring hazardous beach conditions, particularly along north-facing beaches of Puerto Rico and the U.S. Virgin Islands, increasing the risk of rip currents. Beachgoers are urged to heed the advice of the flag warning system and to always swim near a lifeguard. .SJU WATCHES/WARNINGS/ADVISORIES... PR...None. VI...None. AM...None. |
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