FZUS51 KLWX 150858 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 458 AM EDT Wed Apr 15 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. ANZ500-152300- 458 AM EDT Wed Apr 15 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... It will remain very warm and dry through Friday as an area of high pressure builds across the Mid-Atlantic. A cold front late this weekend could bring the next chance for widespread showers. Small Craft Advisories may be needed at times Thursday through Thursday night and again late Saturday through Monday. $$ ANZ535-152300- Tidal Potomac from Key Bridge to Indian Head- 458 AM EDT Wed Apr 15 2026 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. .THU...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .THU NIGHT...W winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. .FRI...NW winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers through the night. .SUN...NW winds 10 to 15 kt. Waves 1 ft. A chance of showers. $$ ANZ536-152300- Tidal Potomac from Indian Head to Cobb Island- 458 AM EDT Wed Apr 15 2026 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 5 to 10 kt. Waves 1 ft. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. .THU...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft. A chance of showers through the night. .SUN...W winds 10 to 15 kt...becoming NW. Waves 1 ft. A chance of showers. $$ ANZ537-152300- Tidal Potomac from Cobb Island to Smith Point- 458 AM EDT Wed Apr 15 2026 .REST OF THE OVERNIGHT...SW winds 10 kt. Waves 1 ft. .TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .TONIGHT...SW winds 10 kt with gusts to 20 kt. Waves 1 to 2 ft. .THU...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds 10 to 15 kt...becoming S after midnight. Waves 1 to 2 ft. A chance of showers after midnight. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 to 3 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ530-152300- Chesapeake Bay north of Pooles Island- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. Isolated showers. .TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. .THU...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds 5 to 10 kt. Waves 1 ft or less. A chance of showers through the night. .SUN...SW winds 10 to 15 kt...becoming NW. Waves 1 to 2 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ531-152300- Chesapeake Bay from Pooles Island to Sandy Point- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .THU...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 to 2 ft. .THU NIGHT...SW winds 10 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .FRI...W winds 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds 10 to 15 kt. Waves 1 ft. A chance of showers through the night. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ538-152300- Patapsco River including Baltimore Harbor- 458 AM EDT Wed Apr 15 2026 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. .TODAY...SW winds 5 to 10 kt. Waves 1 ft. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. .THU...SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft or less. .SAT...SE winds 5 to 10 kt. Waves 1 ft or less. A chance of showers through the night. .SUN...W winds 10 to 15 kt...becoming NW. Waves 1 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ539-152300- Chester River to Queenstown MD- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 5 kt. Waves flat. .TODAY...SW winds 5 to 10 kt with gusts to 20 kt... becoming S 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .THU...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .THU NIGHT...SW winds 10 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .FRI...W winds 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft. A chance of showers through the night. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 to 3 ft. A chance of showers. $$ ANZ532-152300- Chesapeake Bay from Sandy Point to North Beach- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .THU...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 to 2 ft. .THU NIGHT...SW winds 10 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...SE winds 10 to 15 kt...becoming S after midnight. Waves 1 to 2 ft. A chance of showers through the night. .SUN...SW winds 15 to 20 kt...becoming NW. Waves 2 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ540-152300- Eastern Bay- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 5 to 10 kt with gusts to 20 kt... becoming S 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .THU...S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .THU NIGHT...SW winds 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...NE winds around 5 kt...becoming S 10 to 15 kt. Waves 1 ft. A chance of showers through the night. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 ft. A chance of showers. $$ ANZ533-152300- Chesapeake Bay from North Beach to Drum Point- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .THU...SW winds 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 to 2 ft. .THU NIGHT...SW winds 10 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. .SAT...SE winds 10 to 15 kt...becoming S after midnight. Waves 1 to 2 ft. A chance of showers through the night. .SUN...SW winds 15 to 20 kt...becoming NW 20 to 25 kt. Waves 2 to 3 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ541-152300- Choptank River to Cambridge MD and the Little Choptank River- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .THU...SW winds 10 kt. Gusts up to 20 kt in the afternoon. Waves 1 ft. .THU NIGHT...SW winds 10 kt. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 to 10 kt. Waves 1 ft. .SAT...NE winds around 5 kt...becoming S 10 to 15 kt. Waves 1 ft. A chance of showers through the night. .SUN...SW winds 15 to 20 kt...becoming NW. Waves 2 to 3 ft. A chance of showers. $$ ANZ542-152300- Patuxent River to Broomes Island MD- 458 AM EDT Wed Apr 15 2026 .REST OF THE OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .TODAY...SW winds 5 to 10 kt. Waves 1 ft. .TONIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. .SAT...SE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft. A chance of showers after midnight. .SUN...W winds 10 to 15 kt...becoming NW. Waves 1 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ534-152300- Chesapeake Bay from Drum Point to Smith Point- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 10 kt. Waves 1 ft. .TODAY...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .THU...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...SW winds 5 kt...becoming NE after midnight. Waves 1 ft. .SAT...SE winds 10 to 15 kt...becoming S 15 to 20 kt after midnight. Waves 1 to 2 ft...building to 3 ft after midnight. .SUN...SW winds 15 to 20 kt...becoming NW 20 to 25 kt. Waves 3 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ543-152300- Tangier Sound and the inland waters surrounding Bloodsworth Island- 458 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .REST OF THE OVERNIGHT...SW winds 10 kt. Waves 1 ft. .TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .THU...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...SW winds 5 kt...becoming NE after midnight. Waves 1 ft. .SAT...SE winds 10 to 15 kt...becoming S 15 to 20 kt after midnight. Waves 1 to 2 ft. .SUN...SW winds 15 to 20 kt...becoming NW 20 to 25 kt. Waves 2 to 3 ft. A chance of showers. $$