Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Last Update: 401 AM EDT Sat Aug 1 2026

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Philadelphia, PA Local Forecast Office

35NM NNW Lewes DE

Marine Zone Forecast

Today

S winds around 5 kt, becoming SE 10 to 15 kt with gusts up to 20 kt. Seas 1 foot or less, then around 2 ft this afternoon. Wave detail: S 1 foot at 2 seconds, becoming SE 2 ft at 3 seconds.

Tonight

S winds 10 to 15 kt. Seas around 2 ft. Wave detail: SE 2 ft at 4 seconds.

Sun

SE winds 10 to 15 kt, increasing to 15 to 20 kt in the afternoon. Seas 2 to 3 ft. Wave detail: SE 3 ft at 4 seconds. A chance of showers and tstms in the afternoon.

Sun Night

SE winds 15 to 20 kt, becoming S 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave detail: SE 3 ft at 5 seconds. A chance of tstms. Showers.

Mon

SW winds 5 to 10 kt. Seas around 2 ft. Wave detail: SE 2 ft at 7 seconds. Showers. A chance of tstms in the afternoon.

Mon Night

S winds 5 to 10 kt. Seas around 2 ft. Wave detail: SE 2 ft at 7 seconds. Showers with a chance of tstms in the evening, then a chance of showers after midnight.

Tue

SE winds 5 to 10 kt. Seas around 2 ft in the morning, then 1 foot or less. A chance of showers in the morning, then showers likely with a chance of tstms in the afternoon.

Tue Night

S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft after midnight. Showers likely with a chance of tstms in the evening, then a chance of showers after midnight.

Wed

S winds 5 to 10 kt. Seas 1 foot or less. A chance of showers. A chance of tstms in the afternoon.

Wed Night

S winds 5 to 10 kt. Seas around 2 ft. A chance of showers and tstms in the evening.

winds and seas higher in and near tstms.

Winds and seas higher in and near tstms.