Heavy Rain in the Southern Appalachians; Heat Continues in the West; Monitoring Tropical Storm Erin

Heavy to excessive rain falling over the southern Appalachians may bring areas of flooding into Wednesday. Hot temperatures are in place through Wednesday across parts of the western U.S. and New England. Tropical Storm Erin is forecast to become a Hurricane by late this week as it moves westward across the central Atlantic Ocean. Monitor forecasts for any Puerto Rico or U.S. East Coast impacts. Read More >

Hazardous Weather Conditions

Last Update: 456 PM AST Tue Aug 12 2025

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San Juan, PR Local Forecast Office

9NM NNW Charlotte Amalie VI

Marine Zone Forecast


Tonight
East winds 10 to 15 knots with gusts up to 20 knots. Seas 3 to 4 feet. Wave detail: east 3 feet at 6 seconds and northeast 3 feet at 9 seconds. Isolated showers this evening, then scattered showers after midnight.
Wednesday
East winds 10 to 15 knots with gusts up to 20 knots. Seas 2 to 3 feet. Wave detail: northeast 3 feet at 9 seconds and east 1 foot at 3 seconds. Scattered showers early in the morning.
Wednesday Night
East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave detail: east 3 feet at 4 seconds and northeast 3 feet at 8 seconds. Scattered showers.
Thursday
East winds 15 to 20 knots, diminishing to 10 to 15 knots in the afternoon. Seas 3 to 4 feet. Wave detail: east 3 feet at 5 seconds and northeast 2 feet at 9 seconds.
Thursday Night
East winds 10 to 15 knots with gusts up to 25 knots. Seas 3 to 4 feet. Wave detail: northeast 4 feet at 9 seconds and east 3 feet at 6 seconds.
Friday
Northeast winds 10 to 15 knots. Seas 3 to 4 feet. Wave detail: northeast 4 feet at 9 seconds. Scattered showers until late afternoon.
Friday Night
Northeast winds 10 to 15 knots. Seas 2 to 3 feet. Scattered showers.
Saturday
Tropical storm conditions possible. Scattered showers in the morning.
Saturday Night
Northwest winds 10 to 15 knots, becoming west after midnight. Seas 4 to 5 feet.
Sunday
Southwest winds 5 to 10 knots, becoming south in the afternoon. Seas 4 to 6 feet.
Sunday Night
South winds 5 to 10 knots, increasing to 10 to 15 knots with gusts up to 20 knots after midnight. Seas 4 to 5 feet. Numerous showers.



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456 PM AST Tue Aug 12 2025
 
 

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