Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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154 FZUS51 KLWX 082034 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 434 PM EDT Tue Jul 8 2025 Tidal Potomac River and Maryland portion of Chesapeake Bay. Forecasts of wave heights do not include effects of wind direction relative to tidal currents. Expect higher waves when winds are blowing against the tidal flow. Waves flat where waters are iced over. ANZ500-090800- 434 PM EDT Tue Jul 8 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A front will drop closer to the area this afternoon and may stall nearby through much of the week. $$ ANZ535-090800- Tidal Potomac from Key Bridge to Indian Head- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds around 5 kt. Waves 1 ft. Showers and tstms likely. Vsby 1 NM or less. .WED...SW winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...S winds around 5 kt. Waves 1 ft. Showers and tstms likely. .THU...S winds around 5 kt. Waves 1 ft. Showers and tstms likely. .THU NIGHT...S winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves 1 ft or less. Showers likely with a chance of tstms through the night. .SAT...S winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-090800- Tidal Potomac from Indian Head to Cobb Island- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds around 5 kt. Waves 1 ft. Showers and tstms likely. Vsby 1 NM or less. .WED...SW winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .THU...S winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...S winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .FRI...SW winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms. .SAT...S winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-090800- Tidal Potomac from Cobb Island to Smith Point- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. A slight chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .WED...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU...SW winds 5 to 10 kt. Waves 1 ft. Showers with tstms likely. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI...SW winds around 5 kt. Waves 1 ft or less. Showers likely with a chance of tstms. .SAT...S winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-090800- Chesapeake Bay north of Pooles Island- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds around 5 kt. Waves 1 ft. Showers and tstms likely. Vsby 1 NM or less. .WED...SW winds around 5 kt. Waves 1 ft. .WED NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .THU...S winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds around 5 kt. Waves 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves 1 ft or less. A chance of showers. A chance of tstms through the night. .SAT...SE winds around 5 kt. Waves 1 ft. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-090800- Chesapeake Bay from Pooles Island to Sandy Point- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Showers and tstms likely. Vsby 1 NM or less. .WED...SW winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .THU...S winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves flat. A chance of showers. A chance of tstms. .SAT...SE winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-090800- Patapsco River including Baltimore Harbor- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. Showers and tstms likely. Vsby 1 NM or less. .TONIGHT...SW winds around 5 kt. Waves 1 ft or less. Showers and tstms likely. Vsby 1 NM or less. .WED...S winds around 5 kt. Waves flat. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds around 5 kt. Waves flat. Showers likely with a chance of tstms. .THU...S winds around 5 kt. Waves flat. Showers and tstms likely. .THU NIGHT...S winds around 5 kt. Waves flat. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves flat. A chance of showers. A chance of tstms. .SAT...SE winds around 5 kt. Waves flat. A chance of showers and tstms. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-090800- Chester River to Queenstown MD- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 kt. Waves less than 1 ft. Showers and tstms likely. Vsby 1 NM or less. .WED...SW winds 5 kt. Waves flat. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers likely with a chance of tstms. .THU...SW winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves flat. Showers likely with a chance of tstms. .SAT...SE winds around 5 kt. Waves flat. A chance of showers. A chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-090800- Chesapeake Bay from Sandy Point to North Beach- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...W winds 5 to 10 kt...becoming SW in the late evening and overnight. Waves 1 ft. Showers and tstms likely. Vsby 1 NM or less. .WED...S winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU...SW winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves 1 ft or less. Showers likely with a chance of tstms. .SAT...S winds 5 kt. Waves less than 1 ft. A chance of showers. A chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-090800- Eastern Bay- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. Showers and tstms likely. Vsby 1 NM or less. .WED...SW winds 5 kt. Waves flat. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU...SW winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves flat. Showers likely with a chance of tstms. .SAT...SE winds around 5 kt. Waves flat. A chance of showers. A chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-090800- Chesapeake Bay from North Beach to Drum Point- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. A slight chance of showers and tstms. Vsby 1 NM or less. .TONIGHT...SW winds 5 to 10 kt...becoming SE late in the evening, then becoming SW after midnight. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .WED...S winds around 5 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves 1 ft or less. A chance of showers. A chance of tstms. .SAT...S winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-090800- Choptank River to Cambridge MD and the Little Choptank River- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. A chance of showers and tstms. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .WED...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves 1 ft or less. A chance of showers. A chance of tstms. .SAT...S winds around 5 kt. Waves 1 ft or less. A chance of showers. A chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-090800- Patuxent River to Broomes Island MD- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 1 ft. A slight chance of showers and tstms. .TONIGHT...S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .WED...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU...SW winds 5 kt. Waves less than 1 ft. Showers and tstms likely. .THU NIGHT...SW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms. .FRI...S winds around 5 kt. Waves 1 ft. A chance of showers. A chance of tstms. .SAT...S winds around 5 kt. Waves 1 ft. A chance of showers and tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-090800- Chesapeake Bay from Drum Point to Smith Point- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt. Waves 2 ft. A slight chance of showers and tstms. .TONIGHT...SW winds 5 to 10 kt. Waves 2 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .WED...S winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .WED NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. .THU...SW winds 10 kt. Waves 1 ft. Showers with tstms likely. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .SAT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-090800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 434 PM EDT Tue Jul 8 2025 ...SEVERE THUNDERSTORM WATCH 496 IN EFFECT UNTIL 9 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 15 kt. Waves 1 ft. A slight chance of showers and tstms. .TONIGHT...S winds 10 to 15 kt. Waves 1 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .WED...SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely. Vsby 1 NM or less. .WED NIGHT...SW winds 10 kt. Waves 1 ft. Showers and tstms likely. .THU...SW winds 10 kt. Waves 1 ft. Tstms likely with a chance of showers. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms. .FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers. A chance of tstms. .SAT...SW winds 5 kt...becoming S. Waves 1 ft or less. A chance of showers. A chance of tstms through the night. Winds and waves higher and visibilities lower in and near tstms. $$