FZUS51 KLWX 230259 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 1059 PM EDT Wed Apr 22 2026 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. ANZ500-230800- 1059 PM EDT Wed Apr 22 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A cold front will stall southwest of the Potomac River on Thursday. The front will lift back northward as a warm front Friday into Saturday, then will be followed by a cold front Saturday night. Small Craft Advisories may be needed for portions of the waters in east to southeast flow Friday night into Saturday. $$ ANZ535-230800- Tidal Potomac from Key Bridge to Indian Head- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. .THU...NW winds around 5 kt. Waves 1 ft. .THU NIGHT...W winds around 5 kt. Waves 1 ft or less. .FRI...NE winds around 5 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...E winds 5 to 10 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft. Showers. .SUN...NE winds 5 to 10 kt. Waves 1 ft. Showers likely, mainly in the morning. .MON...E winds 5 to 10 kt. Waves 1 ft. A chance of showers through the night. $$ ANZ536-230800- Tidal Potomac from Indian Head to Cobb Island- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. .THU...NW winds around 5 kt. Waves 1 ft. .THU NIGHT...SW winds around 5 kt. Waves 1 ft or less. .FRI...N winds around 5 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .SAT...E winds 5 to 10 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft. Showers. .SUN...NE winds 5 to 10 kt. Waves 1 ft. Showers likely, mainly in the morning. .MON...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft. A chance of showers through the night. $$ ANZ537-230800- Tidal Potomac from Cobb Island to Smith Point- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. .THU...W winds 5 kt. Waves less than 1 ft. .THU NIGHT...S winds around 5 kt. Waves flat. .FRI...NE winds 5 to 10 kt. Waves 1 ft or less. A chance of showers. .FRI NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt. Waves 2 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers. .SUN...NE winds 10 to 15 kt. Waves 2 ft. Showers likely in the morning, then a chance of showers through the night. .MON...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ530-230800- Chesapeake Bay north of Pooles Island- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...NE winds 5 kt. Waves flat. .THU...NW winds around 5 kt. Waves flat. .THU NIGHT...NE winds around 5 kt. Waves flat. .FRI...E winds around 5 kt. Waves flat. .FRI NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers. .SUN...NE winds 5 to 10 kt. Waves 1 ft or less. Showers likely, mainly in the morning. .MON...E winds 5 to 10 kt. Waves 1 ft or less. A chance of showers after midnight. $$ ANZ531-230800- Chesapeake Bay from Pooles Island to Sandy Point- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...NW winds 5 kt. Waves less than 1 ft. Patchy fog with vsby 1 to 3 NM. .THU...W winds 5 kt. Waves less than 1 ft. Patchy fog. Vsby 1 to 3 NM. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...E winds 5 kt. Waves flat. .FRI NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers. .SUN...NE winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 to 2 ft. Showers likely, mainly in the morning. .MON...E winds 5 to 10 kt. Waves 1 ft. A chance of showers after midnight. $$ ANZ538-230800- Patapsco River including Baltimore Harbor- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...NW winds 5 kt. Waves flat. .THU...N winds around 5 kt. Waves flat. .THU NIGHT...E winds around 5 kt. Waves flat. .FRI...E winds 5 kt. Waves flat. A chance of showers. .FRI NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...E winds 5 to 10 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 10 kt with gusts to 20 kt. Waves 1 ft. Showers. .SUN...NE winds 5 to 10 kt. Waves 1 ft. Showers likely, mainly in the morning. .MON...E winds 5 kt. Waves less than 1 ft. A chance of showers after midnight. $$ ANZ539-230800- Chester River to Queenstown MD- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves flat. Patchy fog with vsby 1 to 3 NM. .THU...NW winds 5 kt. Waves flat. Patchy fog. Vsby 1 to 3 NM. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...NE winds 5 kt. Waves flat. .FRI NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers. .SUN...NE winds 10 to 15 kt...diminishing to around 5 kt after midnight. Waves 1 ft. Showers likely, mainly in the morning. .MON...E winds 5 kt...becoming SE. Waves 1 ft or less. A chance of showers after midnight. $$ ANZ532-230800- Chesapeake Bay from Sandy Point to North Beach- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. .THU...NE winds 5 kt. Waves less than 1 ft. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...NE winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers. .SUN...NE winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight. Waves 1 to 2 ft. Showers likely, mainly in the morning. .MON...NE winds 5 to 10 kt...becoming SE. Waves 1 to 2 ft. A chance of showers after midnight. $$ ANZ540-230800- Eastern Bay- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. Patchy fog with vsby 1 to 3 NM. .THU...NW winds 5 kt. Waves less than 1 ft. Patchy fog. Vsby 1 to 3 NM. .THU NIGHT...SE winds around 5 kt. Waves flat. .FRI...NE winds around 5 kt. Waves flat. .FRI NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers. .SUN...NE winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 ft. Showers likely, mainly in the morning. .MON...NE winds 5 to 10 kt...becoming SE. Waves 1 ft or less. A chance of showers after midnight. $$ ANZ533-230800- Chesapeake Bay from North Beach to Drum Point- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...SW winds 5 to 10 kt...becoming NW late. Waves 1 ft. .THU...N winds 5 kt. Waves less than 1 ft. .THU NIGHT...S winds around 5 kt. Waves flat. .FRI...NE winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely. .SAT NIGHT...NE winds 15 to 20 kt. Waves 2 to 3 ft. Showers. .SUN...NE winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight. Waves 2 to 3 ft...subsiding to 1 ft after midnight. Showers likely, mainly in the morning. .MON...E winds 10 to 15 kt...becoming SE after midnight. Waves 1 to 2 ft. A chance of showers after midnight. $$ ANZ541-230800- Choptank River to Cambridge MD and the Little Choptank River- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. .THU...NW winds around 5 kt. Waves 1 ft. .THU NIGHT...S winds around 5 kt. Waves flat. .FRI...NE winds 5 kt. Waves flat. .FRI NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. Showers. .SUN...NE winds 10 to 15 kt. Waves 1 to 2 ft. Showers likely, mainly in the morning. .MON...NE winds 5 to 10 kt...becoming SE. Waves 1 ft. A chance of showers after midnight. $$ ANZ542-230800- Patuxent River to Broomes Island MD- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...W winds 5 kt. Waves less than 1 ft. .THU...N winds around 5 kt. Waves 1 ft. .THU NIGHT...Light winds. Waves 1 ft. .FRI...NE winds around 5 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...SE winds 5 kt. Waves less than 1 ft. A chance of showers. .SAT...E winds 5 to 10 kt. Waves 1 ft. Showers likely. .SAT NIGHT...NE winds 5 to 10 kt. Waves 1 ft. Showers. .SUN...NE winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 ft. Showers likely in the morning, then a chance of showers through the night. .MON...E winds 5 to 10 kt...becoming SE after midnight. Waves 1 ft. A chance of showers through the night. $$ ANZ534-230800- Chesapeake Bay from Drum Point to Smith Point- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...SW winds 5 to 10 kt...becoming W late. Waves 1 ft. .THU...NW winds 5 to 10 kt...becoming SE late. Waves 1 ft. .THU NIGHT...SW winds around 5 kt. Waves flat. .FRI...NE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...SE winds 10 kt. Waves 2 ft. A chance of showers. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance of showers. .SAT NIGHT...NE winds 15 to 20 kt. Waves 2 to 3 ft. Showers. .SUN...NE winds 15 to 20 kt. Waves 2 to 3 ft. Showers likely in the morning, then a chance of showers through the night. .MON...E winds 10 to 15 kt...becoming SE after midnight. Waves 1 to 2 ft. A chance of showers through the night. $$ ANZ543-230800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 1059 PM EDT Wed Apr 22 2026 .REST OF TONIGHT...SW winds 5 kt...becoming NW late. Waves 1 ft. .THU...W winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...S winds 5 kt. Waves flat. .FRI...E winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...SE winds 10 kt. Waves 1 ft. A chance of showers. .SAT...E winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of showers. .SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers. .SUN...NE winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight. Waves 1 to 2 ft. Showers likely in the morning, then a chance of showers through the night. .MON...E winds 10 to 15 kt...becoming SE 5 to 10 kt after midnight. Waves 1 ft. A chance of showers after midnight. $$