Heat Builds in the West; Severe Thunderstorms and Heavy Rain in the Upper Midwest and Mid-Mississippi Valley; Extremely Critical Fire Weather in the Northwest on Saturday

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rainfall are expected over parts of the Upper Midwest to mid-Mississippi Valley today. Critical to extremely critical fire weather conditions from the Northwest and the northern Great Basin on Saturday and Sunday. Read More >

For More Weather Information:

Philadelphia, PA Local Forecast Office

15NM NE Lewes DE

Marine Point Forecast

[NOTICE]

This Afternoon
High: 85 °F
Light Wind
1ft
Tonight
Low: 71 °F
S 10kt
1ft
Saturday
High: 85 °F
⇑SSE 10kt
1ft
Saturday Night
Low: 73 °F
S 10kt
1ft
Sunday
High: 86 °F
SSE 10kt
1ft
Sunday Night
Low: 73 °F
S 10kt
1ft
Monday
High: 86 °F
SSW 10kt
1ft
Monday Night
Low: 71 °F
Light Wind
1ft
Tuesday
High: 83 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Associated Zone Forecast which includes this point

Last Update: 8:59 am EDT Jul 31, 2026
Forecast Valid: 12pm EDT Jul 31, 2026-6pm EDT Aug 6, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

Variable winds 5 kt or less. Mostly sunny. Seas around 1 ft.

Tonight

S wind 5 to 10 kt. Mostly clear. Seas around 1 ft.

Saturday

Variable winds less than 5 kt becoming SSE 5 to 10 kt in the afternoon. Mostly sunny. Seas around 1 ft.

Saturday Night

S wind around 10 kt. Mostly cloudy. Seas around 1 ft.

Sunday

SSE wind 5 to 10 kt. Partly sunny. Seas around 1 ft.

Sunday Night

S wind around 10 kt. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Seas around 1 ft.

Monday

SSW wind around 10 kt. Showers likely, with thunderstorms also possible after 2pm. Seas around 1 ft.

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms. Seas around 1 ft.

Tuesday

Variable winds 5 kt or less. A chance of showers. Seas around 1 ft.

Winds and seas higher in and near tstms.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.