🌊 US Weather Warriors MarineCast — Wednesday, August 12, 2026
Coastal Flood Advisories are in effect along parts of Delmarva, while a Marine Weather Statement remains posted for portions of the Chesapeake Bay early this morning.
Today on the Water: Coastal Flood Advisories affect Delaware and nearby New Jersey coastal areas through early Thursday morning. A Marine Weather Statement covers portions of the Chesapeake Bay until 5:15 AM Wednesday. Sub-Small Craft Advisory winds are expected today, but isolated showers and thunderstorms may affect the waters. The supplied forecast points to a stronger south-wind period later in the outlook.
Atlantic Coastal Waters (Lewes → southern VA coast): Today-specific coastal-water details are limited. Tonight brings southeast winds 5 to 10 kt, becoming south after midnight, with seas around 1 foot. The calmest listed window is tonight. Showers are noted in the forecast.
Delaware Bay: Today-specific bay details are limited. Tonight, south winds around 5 kt become southwest after midnight, with seas 1 foot or less. That is the lightest-wind period in the supplied forecast; showers are possible at times.
Chesapeake Bay & Delmarva-facing Waters: Northwest winds 5 to 10 kt, with gusts up to 15 kt, become north late today. Waves are around 1 foot. A slight chance of showers exists early this morning, with a slight chance of showers and thunderstorms this afternoon. Tonight, east winds near 5 kt turn south late evening and overnight.
Wind & Seas Outlook: The next defined peak in the supplied outlook is Sunday Night, when south winds reach 15 to 20 kt, with gusts up to 25 kt on the Atlantic waters and Chesapeake Bay. Atlantic coastal waters and Delaware Bay build to 2 to 3 ft Sunday Night, with showers possible.
Marine Alerts:
- Coastal Flood Advisory for Kent, Inland Sussex, Delaware Beaches, Cumberland, Cape May, Atlantic Coastal Cape May, until Thursday at 1:00 AM EDT.
- Coastal Flood Advisory for New Castle and Salem, until Thursday at 2:00 AM EDT.
- Marine Weather Statement for portions of the Chesapeake Bay, until 5:15 AM Wednesday.
Best Window to be Out: Tonight, after the early Bay statement expires: light winds and 1-foot-or-less conditions are the best available window, but account for coastal flooding near affected shore access points.
Worst Window: Sunday Night, when south winds increase to 15 to 20 kt and seas build to 2 to 3 ft.
Bottom Line: Launches are manageable in the lighter conditions tonight, but coastal flooding and isolated thunderstorms keep today from being a carefree run.
— US Weather Warriors #DelmarvaWeather #MarineWeather #BoatingWeather