🌊 US Weather Warriors MarineCast — Sunday, August 9, 2026
Choppy Atlantic seas are the main concern today, with 3 to 4 ft seas occasionally reaching 6 ft before easing tonight.
Today on the Water: No active marine alerts, but Atlantic waters will be roughest today with southwest winds up to 15 kt and gusts to 20 kt. Radar is quiet across Delmarva, though isolated to scattered showers and thunderstorms remain in the afternoon forecast. Conditions settle notably tonight, especially in the Delaware Bay and coastal waters.
Atlantic Coastal Waters (Lewes → southern VA coast): Southwest winds 10 to 15 kt with gusts to 20 kt ease to 5 to 10 kt early this afternoon, then turn south at 10 to 15 kt late. Seas run 3 to 4 ft, occasionally to 6 ft, before subsiding to 2 to 3 ft; a slight chance of afternoon showers and thunderstorms remains. Best coastal window is tonight, with southwest winds 5 to 10 kt and seas around 2 ft.
Delaware Bay: West winds 5 to 10 kt become south late, with seas around 2 ft and isolated afternoon showers or thunderstorms possible. Tonight is the smoother stretch: southwest winds around 5 kt, with seas 1 ft or less.
Chesapeake Bay & Delmarva-facing Waters: Southwest winds 10 to 15 kt with gusts up to 20 kt diminish to 5 to 10 kt late this morning and early this afternoon, then become southeast around 10 kt late. Waves include southwest 2 ft at 3 seconds and southeast 2 ft at 7 seconds; showers and thunderstorms are possible this afternoon. The lightest Bay conditions are west winds around 5 kt with waves less than 1 ft.
Wind & Seas Outlook: The peak wind and sea period is today over the Atlantic coastal waters, where seas may occasionally reach 6 ft. Tonight brings the lowest winds and seas; by Tuesday, Delaware Bay winds are west 5 to 10 kt with seas around 2 ft.
Marine Alerts: No active marine alerts.
Best Window to be Out: Tonight in Delaware Bay or along the Atlantic coast, after seas subside and winds fall to 5 to 10 kt.
Worst Window: Today on the Atlantic coastal waters, especially before seas ease from 3 to 4 ft with occasional 6-footers.
Bottom Line: Launch plans favor the Chesapeake or a wait until tonight, while the open Atlantic is a bumpy ride today.
— US Weather Warriors #DelmarvaWeather #MarineWeather #BoatingWeather