Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Last Update: 401 PM EDT Thu Aug 27 2026

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Philadelphia, PA Local Forecast Office

19NM NNE Lewes DE

Marine Zone Forecast

...SEVERE THUNDERSTORM WATCH 630 IN EFFECT UNTIL 8 PM EDT THIS EVENING...

Tonight

S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt late this evening and early morning, then becoming W late. Seas around 2 ft. Wave detail: SE 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers after midnight.

Fri

S winds around 5 kt. Seas 1 to 2 ft. Wave detail: SE 1 foot at 5 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms in the afternoon.

Fri Night

W winds around 5 kt, becoming N after midnight. Seas 1 to 2 ft. Wave detail: SE 1 foot at 5 seconds and SE 1 foot at 8 seconds. A chance of showers and tstms in the evening.

Sat

NE winds 5 to 10 kt, becoming E in the afternoon. Seas 1 to 2 ft. Wave detail: S 1 foot at 5 seconds and SE 1 foot at 8 seconds.

Sat Night

SE winds around 5 kt. Seas 1 to 2 ft. Wave detail: SE 1 foot at 4 seconds and SE 1 foot at 8 seconds.

Sun

S winds around 5 kt, becoming SE in the afternoon. Seas 1 foot or less. Wave detail: SE 1 foot at 8 seconds.

Sun Night

S winds 5 to 10 kt. Seas around 2 ft.

Mon

SW winds around 5 kt. Seas 1 foot or less.

Mon Night

S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight.