Puerto Rico Caribbean Waters from 10nm to 17N Marine Forecast
| Rest Of Today...South Winds 5 To 10 Knots. Seas Around 2 Feet Or Less. Dominant Period 11 Seconds. Isolated Showers. |
| Tonight...West Winds 5 To 10 Knots, Becoming Northwest After Midnight. Seas Around 2 Feet Or Less. Dominant Period 11 Seconds. Isolated Showers. |
| Thursday...West Winds 5 To 10 Knots. Seas 1 To 3 Feet. Dominant Period 11 Seconds. Isolated Showers. |
| Thursday Night...North Winds 10 To 15 Knots. Gusts Up To 25 Knots In The Evening. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 11 Seconds. Scattered Showers. |
| Friday...Northeast 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 2 To 4 Feet With Occasional Seas Around 5 Feet. Dominant Period 12 Seconds. Isolated Showers. |
| Sunday...Southeast Winds 5 To 10 Knots, Becoming East. Seas 3 To 5 Feet With Occasional Seas Up To 6 Feet. Dominant Period 12 Seconds. |
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Area Forecast Discussion National Weather Service San Juan PR 408pm AST Sat Jan 25 2025 Synopsis A gradual increase in moisture is expected from tonight into Sunday across the region. Variable weather conditions are anticipated with light to moderate showers moving over the eastern half of Puerto Rico and the U.S. Virgin Islands. Hazardous marine and coastal conditions continue across the local waters and passages, as well the northern and eastern coastlines of the islands. A high risk of rip currents continue in effect, as well as a small craft advisory for boaters. .SHORT TERM...Tonight through Monday... Today, mostly clear to partly cloudy skies prevailed, with only a few light showers moving in with the trade winds across eastern Puerto Rico’s municipalities, bringing only trace amounts of rain. Winds remained easterly at approximately 10 to 15 mph, with periods of higher gusts around 18 to 25 mph, particularly along coastal areas. The lack of cloud cover allowed maximum temperatures to range from the mid to upper 80s in urban and low-elevation areas, and even into the low 90s in some spots in southern Puerto Rico, while temperatures in mountainous regions remained in the mid-70s to low 80s. Looking ahead, the short-term forecast remains on track. Tonight through Sunday morning, we should see an increase in humidity levels, reaching typical seasonal values near 1.5 inches of precipitable water (PWAT). This will bring more variable conditions and the onset of more frequent light to moderate showers, especially across the eastern half of Puerto Rico and surrounding islands and waters. However, showers are expected to move quickly, and no flooding risks are anticipated at the moment. Model guidance shows that most of the activity will occur over the Caribbean waters on Sunday afternoon, but some showers may again reach eastern sectors of the island. An approaching TUTT will begin to influence the region by Monday, increasing instability. Combined with available moisture, this will support continued variable conditions, with breezy trade winds pooling moisture across the islands, leading to short, passing showers, especially in windward areas. Winds will remain easterly in response to a surface high-pressure system situated over the Central Atlantic. As for temperatures, they will remain in the mid to upper 80s for lower elevations and mid to upper 70s for higher elevations. Long Term Tuesday through Saturday... /...from previous discussion.../ Instability will increase in response to a short wave trough at upper levels and a low at mid-levels on Tuesday. This will be followed by a more stable atmosphere Wednesday through Friday as a mid-to-upper-level ridge builds over the Northeast Caribbean. Then, we expect a trough amplifying from the Northeast near us by Saturday, enhancing instability near the archipelago. Meanwhile, a surface high pressure centered across the Central Atlantic will keep away a frontal boundary (moving eastward across the Western Atlantic) from PR and USVI. Its associated pre-frontal trough will position off to the northwest of PR. However, the breezy trade winds will promote the arrival of moisture, resulting in occasional periods of showery weather on Wednesday and Friday. Moisture will slowly erode around late Friday through Saturday before the frontal boundary moves closer to the islands by the weekend, as another high pressure builds behind it over the Western Atlantic. Marine A surface high pressure across the central Atlantic will support moderate to fresh easterlies for the next several days. As a result, choppy to hazardous wind-driven seas continue across most of the local waters and passages. Therefore, Small Craft Advisory conditions are expected to continue throughout the weekend. Beach Forecast Life-threatening rip currents will likely develop along the north and east-facing beaches in PR, Culebra and St Croix due to the combination of fresh easterly winds and pulses of a lingering northwesterly swell. As a result, a High Rip Current Risk statement continue in effect. .SJU WATCHES/WARNINGS/ADVISORIES... PR...High Rip Current Risk through late Sunday night for PRZ001-002- 005-008-012. VI...High Rip Current Risk through late Sunday night for VIZ002. AM...Small Craft Advisory until 6am AST Monday for AMZ711-723-741. Small Craft Advisory from midnight tonight to 6am AST Monday for AMZ712-716-726-733. |
San Juan Radar
Southeast Radar