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

33NM NNW Lewes DE

Marine Point Forecast

[NOTICE]

Today
High: 87 °F
Light Wind
< 1ft
Tonight
Low: 68 °F
Light Wind
< 1ft
Saturday
High: 88 °F
⇑SSE 10kt
< 1ft
Saturday Night
Low: 70 °F
Light Wind
< 1ft
Sunday
High: 87 °F
⇑SSE 10kt
< 1ft
Sunday Night
Low: 71 °F
SSE 10kt
< 1ft
Monday
High: 85 °F
SSW 10kt
< 1ft
Monday Night
Low: 69 °F
Light Wind
< 1ft
Tuesday
High: 87 °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: 9am EDT Jul 31, 2026-6pm EDT Aug 6, 2026

View Nearby Observations

Detailed Forecast

Today

Variable winds 5 kt or less. Mostly sunny. Waves 1 ft or less.

Tonight

Variable winds 5 kt or less. Mostly clear. Waves 1 ft or less.

Saturday

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

Saturday Night

Variable winds 5 kt or less. Mostly cloudy. Waves 1 ft or less.

Sunday

SSE wind 5 to 8 kt increasing to 7 to 10 kt in the afternoon. A slight chance of showers after 2pm. Waves 1 ft or less.

Sunday Night

SSE wind 5 to 10 kt becoming S after midnight. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Waves 1 ft or less.

Monday

SSW wind 5 to 10 kt. Showers likely, with thunderstorms also possible after 2pm. Waves 1 ft or less.

Monday Night

Variable winds 5 kt or less. A chance of showers and thunderstorms before 2am. Waves 1 ft or less.

Tuesday

Variable winds 5 kt or less. A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Waves 1 ft or less.

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.