FZUS51 KLWX 151458 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 1058 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. ANZ500-152000- 1058 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. $$ ANZ535-152000- Tidal Potomac from Key Bridge to Indian Head- 1058 AM EDT Wed Apr 15 2026 .REST OF TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon. Waves 1 ft. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...NW winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 kt. Waves 1 ft. .SAT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers through the night. .SUN...NW winds 10 to 15 kt. Waves 1 ft. A chance of showers. $$ ANZ536-152000- Tidal Potomac from Indian Head to Cobb Island- 1058 AM EDT Wed Apr 15 2026 .REST OF 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. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 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. $$ ANZ537-152000- Tidal Potomac from Cobb Island to Smith Point- 1058 AM EDT Wed Apr 15 2026 .REST OF TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon. Waves 1 ft. .TONIGHT...SW winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...NE winds around 5 kt. Waves 1 ft or less. .SAT...SE winds 10 to 15 kt...becoming S after midnight. Waves 1 ft or less...building to 2 ft. A chance of showers after midnight. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 to 3 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ530-152000- Chesapeake Bay north of Pooles Island- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...SW winds 5 to 10 kt. Gusts up to 20 kt this afternoon. Waves 1 to 2 ft. .TONIGHT...SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 to 2 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 kt. Waves 1 ft. .SAT...SE winds 5 to 10 kt. Waves 1 ft. 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. $$ ANZ531-152000- Chesapeake Bay from Pooles Island to Sandy Point- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...SW winds 5 to 10 kt with gusts to 20 kt...becoming S 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 kt after midnight. Waves 1 to 2 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds 5 kt. Waves less than 1 ft. .SAT...SE winds 10 to 15 kt. Waves 1 ft or less. A chance of showers through the night. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ538-152000- Patapsco River including Baltimore Harbor- 1058 AM EDT Wed Apr 15 2026 .REST OF TODAY...SW winds 5 to 10 kt. Waves 1 ft or less. .TONIGHT...SW winds 5 to 10 kt. Waves 1 ft or less. .THU...SW winds 5 to 10 kt. Waves 1 ft or less. .THU NIGHT...W winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 kt. Waves flat. .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. $$ ANZ539-152000- Chester River to Queenstown MD- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...SW winds 5 to 10 kt with gusts to 20 kt...becoming S 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 kt late. Waves 1 to 2 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 kt. Waves 1 ft or less. .SAT...E winds around 5 kt...becoming SE. Waves 1 ft or less. A chance of showers through the night. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 to 3 ft. A chance of showers. $$ ANZ532-152000- Chesapeake Bay from Sandy Point to North Beach- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...S winds 5 to 10 kt with gusts to 20 kt... increasing to 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW 5 to 10 kt late. Gusts up to 20 kt. Waves 1 to 2 ft. .THU...S winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 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 ft or less...building 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. $$ ANZ540-152000- Eastern Bay- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...S winds 5 to 10 kt with gusts to 20 kt... increasing to 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW 5 kt late. Gusts up to 20 kt. Waves 1 to 2 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 kt. Waves flat. .SAT...NE winds around 5 kt...becoming S 10 to 15 kt. Waves 1 ft or less. A chance of showers through the night. .SUN...SW winds 10 to 15 kt...becoming NW 15 to 20 kt. Waves 2 ft. A chance of showers. $$ ANZ533-152000- Chesapeake Bay from North Beach to Drum Point- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...S winds 5 to 10 kt...increasing to 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 kt. Waves 1 ft or less. .SAT...SE winds 10 to 15 kt...becoming S after midnight. Waves 1 ft or less...building 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. $$ ANZ541-152000- Choptank River to Cambridge MD and the Little Choptank River- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...SW winds 5 to 10 kt...becoming S 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. .THU...SW winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...N winds around 5 kt. Waves 1 ft or less. .SAT...NE winds around 5 kt...becoming S 10 to 15 kt. Waves 1 ft or less...building to 2 ft after midnight. A chance of showers through the night. .SUN...SW winds 15 to 20 kt...becoming NW. Waves 2 to 3 ft. A chance of showers. $$ ANZ542-152000- Patuxent River to Broomes Island MD- 1058 AM EDT Wed Apr 15 2026 .REST OF 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. Waves 1 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .FRI...W winds 5 kt. Waves less than 1 ft. A chance of showers. .FRI NIGHT...NE winds around 5 kt. Waves 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. $$ ANZ534-152000- Chesapeake Bay from Drum Point to Smith Point- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...S winds 5 to 10 kt...increasing to 15 kt with gusts to 20 kt late. Waves 1 to 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .THU...S winds 5 to 10 kt. Waves 2 ft. .THU NIGHT...SW winds 5 to 10 kt. Waves 2 ft. .FRI...W winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI NIGHT...E winds around 5 kt. Waves 1 ft. .SAT...SE winds 10 to 15 kt...becoming S 15 to 20 kt after midnight. Waves 1 ft or less...building to 2 to 3 ft. .SUN...SW winds 15 to 20 kt...becoming NW 20 to 25 kt. Waves 3 ft. A chance of showers in the morning, then showers likely through the night. A chance of showers after midnight. $$ ANZ543-152000- Tangier Sound and the inland waters surrounding Bloodsworth Island- 1058 AM EDT Wed Apr 15 2026 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT THIS EVENING... .REST OF TODAY...SW winds 5 to 10 kt...becoming S 15 kt with gusts to 20 kt late. 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 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. .FRI NIGHT...SE winds around 5 kt. Waves flat. .SAT...SE winds 10 to 15 kt...becoming S 15 to 20 kt after midnight. Waves 1 ft or less...building to 2 ft after midnight. .SUN...SW winds 15 to 20 kt...becoming NW 20 to 25 kt. Waves 2 to 3 ft. A chance of showers. $$