Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Last Update: 401 AM EDT Sun Sep 20 2026

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Philadelphia, PA Local Forecast Office

15NM E Lewes DE

Marine Zone Forecast

Today

S winds 10 to 15 kt with gusts up to 20 kt, becoming around 15 kt with gusts up to 20 kt late. Seas 3 to 4 ft. Wave detail: SE 4 ft at 6 seconds.

Tonight

S winds 10 to 15 kt with gusts up to 20 kt, becoming W 5 to 10 kt after midnight. Seas 3 to 4 ft. Wave detail: S 3 ft at 4 seconds and E 3 ft at 8 seconds. A chance of rain in the evening, then rain likely after midnight.

Mon

NE winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave detail: NE 4 ft at 5 seconds and E 3 ft at 8 seconds. A chance of showers.

Mon Night

NE winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 6 ft. Wave detail: E 6 ft at 7 seconds. A chance of showers.

Tue

NE winds 20 to 25 kt with gusts up to 30 kt, increasing to 25 to 30 kt with gusts up to 40 kt in the afternoon. Seas 5 to 8 ft, building to 7 to 10 ft in the afternoon. Wave detail: E 8 ft at 7 seconds, becoming E 9 ft at 7 seconds. Showers likely.

Tue Night

NE winds around 30 kt with gusts up to 40 kt. Seas 9 to 12 ft. Wave detail: E 11 ft at 8 seconds. Showers likely, mainly in the evening.

Wed

NE winds 30 to 35 kt. Seas 10 to 13 ft. A chance of showers.

Wed Night

NE winds 30 to 35 kt. Seas 11 to 13 ft. A chance of showers.

Thu

NE winds 30 to 35 kt. Seas 11 to 14 ft. A chance of showers.

Thu Night

NE winds 30 to 35 kt, diminishing to 25 to 30 kt after midnight. Seas 10 to 14 ft. A chance of showers.