🌊 US Weather Warriors MarineCast — Saturday, August 15, 2026
Dense Fog Advisories remain in effect until 9 AM EDT for listed inland areas, while radar shows a cluster of cells near Cape Charles moving WNW toward the Bay-side coast.
Today on the Water: Radar has five cells within 50 nm of Delmarva, concentrated 15 to 22 miles north and northwest of Cape Charles. The stronger cells are moving WNW at 19 to 21 kt, bringing the immediate concern toward the coast and lower Bay corridor. Official marine text also flags fog, showers, and thunderstorm chances during the period.
Atlantic Coastal Waters (Lewes → southern VA coast): Today-specific wind and sea values are limited in the supplied forecast. Showers are noted. Conditions build Sunday night: south winds 15 to 20 kt, gusting to 30 kt, with seas 3 to 4 ft and occasional 6-foot sets. Showers are likely.
Delaware Bay: Today-specific wind and sea values are limited in the supplied forecast, with showers noted. Sunday night turns rougher with south winds 15 to 20 kt, becoming southwest after midnight, gusts to 30 kt, and 2 to 3 ft seas. Showers and a chance of thunderstorms are forecast.
Chesapeake Bay & Delmarva-facing Waters: Cells near Cape Charles are moving WNW, a worsening direction for the lower Bay-side coast. Fog, showers, and thunderstorm chances are in the marine forecast. Sunday afternoon waves build to 2 to 3 ft with southeast winds increasing to 10 to 15 kt and gusts to 20 kt; south winds reach 15 to 20 kt Sunday night with gusts to 25 kt.
Wind & Seas Outlook: The peak period is Sunday night, with the strongest south winds and highest Atlantic seas. Conditions ease substantially by Tuesday night, when winds are around 5 kt and waters settle to around 2 ft offshore, 1 ft or less in Delaware Bay, and 1 ft on Chesapeake Bay.
Marine Alerts:
- Dense Fog Advisory until 9 AM EDT for Extreme Western Allegany, Central and Eastern Allegany, Western and Eastern Garrett, Hampshire, Western Mineral, and Eastern Mineral.
- Dense Fog Advisory until 9 AM EDT for Washington, Shenandoah, Frederick, Page, Warren, Clarke, Morgan, Berkeley, Jefferson, Hardy, and Eastern Grant.
- Special Weather Statement until 5:30 AM EDT for Washington, Shenandoah, Frederick, Page, Warren, Clarke, Morgan, Berkeley, Jefferson, Hardy, and Eastern Grant.
- Special Weather Statement until 9 AM EDT for the same area.
Best Window to be Out: Tuesday night, when the provided forecast shows the lightest winds and lowest seas across all three zones.
Worst Window: Sunday night—south winds, 25 to 30 kt gusts, building seas, showers, and thunderstorm potential make this the stay-in period.
Bottom Line: Saturday has radar-driven concerns near Cape Charles, and the more hazardous marine setup arrives Sunday night.
— US Weather Warriors #DelmarvaWeather #MarineWeather #BoatingWeather