Severe Thunderstorms; Excessive Rainfall; Dangerous Heat; Air Quality Concerns

Canadian wildfire smoke will push into the Midwest, worsening air quality. A frontal system brings severe storms from the Northern Plains to the Mid‑Atlantic the next few days. Heavy Gulf Coast rain is possible as we closely monitor tropical development, while monsoonal storms persist in the Southwest with heavy rainfall. Hazardous heat expands from the Plains into the Lower Mississippi Valley. Read More >

Last Update: 609 AM EDT Sun Jul 19 2026

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Philadelphia, PA Local Forecast Office

19NM NNE Lewes DE

Marine Zone Forecast

Today

NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Wave detail: W 2 ft at 3 seconds and S 1 foot at 5 seconds. Patchy fog early this morning.

Tonight

NW winds 5 to 10 kt, becoming NE after midnight. Seas around 2 ft. Wave detail: NW 1 foot at 3 seconds and S 1 foot at 7 seconds.

Mon

NE winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Wave detail: SE 1 foot at 2 seconds and NW 1 foot at 3 seconds.

Mon Night

SE winds 10 to 15 kt. Seas around 2 ft. Wave detail: SE 2 ft at 3 seconds and S 1 foot at 6 seconds.

Tue

S winds 10 to 15 kt. Seas around 2 ft. Wave detail: SE 2 ft at 4 seconds. Showers likely in the morning, then showers with a chance of tstms in the afternoon.

Tue Night

SW winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Wave detail: S 3 ft at 4 seconds. A chance of tstms. Showers.

Wed

SW winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Seas 2 to 4 ft. Showers in the morning, then showers likely with a chance of tstms in the afternoon.

Wed Night

W winds 10 to 15 kt, becoming NW after midnight. Seas 2 to 3 ft. Showers likely with a chance of tstms in the evening, then a chance of showers after midnight.

Thu

N winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 3 ft. A chance of showers in the morning.

Thu Night

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

winds and seas higher in and near tstms.

Winds and seas higher in and near tstms.