Coastal Waters Forecast
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
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195 FZUS51 KLWX 190534 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 134 AM EDT Thu Jun 19 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. ANZ500-192000- 134 AM EDT Thu Jun 19 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A strong cold front crosses the waters this evening into early Friday. Increased shower and thunderstorm chances are expected during this time in which Special Marine Warnings may be needed. High pressure returns to the waters this weekend into the middle part of next week. Small Craft Advisories are likely to continue at times through Friday. $$ ANZ535-192000- Tidal Potomac from Key Bridge to Indian Head- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .THU...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .THU NIGHT...W winds 10 to 15 kt with gusts to 20 kt... becoming NW 5 to 10 kt late. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...NW winds 5 kt. Waves less than 1 ft. .FRI NIGHT...SW winds around 5 kt. Waves 1 ft or less. .SAT...SW winds around 5 kt. Waves 1 ft. .SAT NIGHT...S winds 5 kt. Waves less than 1 ft. .SUN...W winds around 5 kt. Waves 1 ft. .MON...W winds around 5 kt. Waves 1 ft or less. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-192000- Tidal Potomac from Indian Head to Cobb Island- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .OVERNIGHT...SW winds 5 kt. Waves less than 1 ft. .THU...SW winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 10 to 15 kt with gusts to 25 kt...becoming NW 5 to 10 kt late. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...NW winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...SW winds around 5 kt. Waves 1 ft or less. .SAT...SW winds around 5 kt. Waves 1 ft. .SAT NIGHT...S winds 5 kt. Waves less than 1 ft. .SUN...SW winds around 5 kt. Waves 1 ft. .MON...NW winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-192000- Tidal Potomac from Cobb Island to Smith Point- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. .THU NIGHT...SW winds 10 to 15 kt...becoming NW late. Gusts up to 25 kt. Waves 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts to 20 kt... becoming W 5 kt in the afternoon. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. .SAT...SW winds 5 to 10 kt. Waves 1 ft or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .MON...S winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-192000- Chesapeake Bay north of Pooles Island- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 5 to 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 10 to 15 kt...becoming W late. Gusts up to 25 kt. Waves 1 to 2 ft. Showers with a chance of tstms. Vsby 1 NM or less. .FRI...W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. .FRI NIGHT...W winds around 5 kt. Waves 1 ft. .SAT...SW winds around 5 kt. Waves 1 ft. .SAT NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 to 10 kt. Waves 1 ft. .MON...W winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-192000- Chesapeake Bay from Pooles Island to Sandy Point- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft... building to 3 ft in the afternoon. Showers likely with a chance of tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 10 to 15 kt...becoming W late. Gusts up to 25 kt. Waves 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .FRI...W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. .SAT...SW winds around 5 kt. Waves 1 ft or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 to 10 kt. Waves 1 ft. .MON...S winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-192000- Patapsco River including Baltimore Harbor- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 5 kt. Waves flat. .THU...SW winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft. Showers with tstms likely. Vsby 1 NM or less. .THU NIGHT...W winds 10 to 15 kt...becoming 10 kt late. Gusts up to 25 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .FRI...W winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...SW winds around 5 kt. Waves flat. .SAT...SW winds around 5 kt. Waves 1 ft or less. .SAT NIGHT...S winds 5 kt. Waves less than 1 ft. .SUN...W winds 5 kt. Waves less than 1 ft. .MON...S winds around 5 kt. Waves flat. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-192000- Chester River to Queenstown MD- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 15 to 20 kt...becoming NW late. Gusts up to 25 kt. Waves 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts to 20 kt... becoming W 5 kt in the afternoon. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. .SAT...SW winds around 5 kt. Waves 1 ft or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...W winds 5 kt. Waves less than 1 ft. .MON...SW winds 5 kt. Waves flat. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-192000- Chesapeake Bay from Sandy Point to North Beach- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Waves 1 ft...building to 3 ft in the afternoon. A chance of showers and tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 15 to 20 kt...becoming W 10 to 15 kt late. Gusts up to 25 kt. Waves 2 to 3 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .FRI...W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. .SAT...SW winds around 5 kt. Waves 1 ft or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .MON...S winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-192000- Eastern Bay- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 15 kt...becoming NW late. Gusts up to 25 kt. Waves 2 ft. Showers likely with a chance of tstms. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts to 20 kt... becoming W 5 kt in the afternoon. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. .SAT...SW winds 5 kt. Waves less than 1 ft. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .MON...W winds 5 kt. Waves flat. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-192000- Chesapeake Bay from North Beach to Drum Point- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 ft...building to 3 ft in the afternoon. A chance of showers and tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 10 to 15 kt...becoming NW late. Gusts up to 25 kt. Waves 2 to 3 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...W winds 10 to 15 kt. Gusts up to 20 kt in the morning. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. .SAT...SW winds 5 to 10 kt. Waves 1 ft or less. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .MON...W winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-192000- Choptank River to Cambridge MD and the Little Choptank River- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 10 to 15 kt...becoming NW late. Gusts up to 25 kt. Waves 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts to 20 kt... becoming W 5 kt in the afternoon. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 kt. Waves less than 1 ft. .SAT...SW winds 5 kt. Waves less than 1 ft. .SAT NIGHT...S winds 5 to 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .MON...W winds 5 kt. Waves less than 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-192000- Patuxent River to Broomes Island MD- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH THIS EVENING... .OVERNIGHT...SW winds 10 kt. Waves 1 ft. .THU...SW winds 10 to 15 kt. Gusts up to 25 kt in the afternoon. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .THU NIGHT...SW winds 10 to 15 kt with gusts to 25 kt...becoming NW late. Waves 1 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...NW winds 5 to 10 kt. Waves 1 ft. .FRI NIGHT...SW winds around 5 kt. Waves 1 ft. .SAT...SW winds around 5 kt. Waves 1 ft. .SAT NIGHT...S winds 5 kt. Waves less than 1 ft. .SUN...SW winds 5 kt. Waves less than 1 ft. .MON...W winds around 5 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-192000- Chesapeake Bay from Drum Point to Smith Point- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 to 15 kt. Waves 1 to 2 ft. .THU...SW winds 15 to 20 kt. Gusts up to 25 kt in the afternoon. Waves 2 to 3 ft. .THU NIGHT...SW winds 15 to 20 kt...becoming NW late. Gusts up to 30 kt. Waves 3 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts to 25 kt... becoming W 5 to 10 kt in the afternoon. Waves 3 ft...subsiding to 1 ft in the afternoon. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .SAT...SW winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...S winds 10 kt. Waves 2 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .MON...NW winds 5 to 10 kt...becoming S. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-192000- Tangier Sound and the inland waters surrounding Bloodsworth Island- 134 AM EDT Thu Jun 19 2025 ...SMALL CRAFT ADVISORY IN EFFECT FROM 1 PM EDT THIS AFTERNOON THROUGH LATE TONIGHT... .OVERNIGHT...SW winds 10 to 15 kt. Waves 1 ft. .THU...SW winds 15 to 20 kt. Gusts up to 25 kt in the afternoon. Waves 2 ft. .THU NIGHT...SW winds 15 to 20 kt...becoming W late. Gusts up to 30 kt. Waves 2 ft. A chance of showers and tstms. Vsby 1 NM or less. .FRI...NW winds 10 to 15 kt with gusts to 25 kt... becoming W 5 to 10 kt in the afternoon. Waves 1 to 2 ft. .FRI NIGHT...SW winds 5 to 10 kt. Waves 1 ft. .SAT...SW winds 5 to 10 kt. Waves 1 ft. .SAT NIGHT...S winds 10 kt. Waves 1 ft. .SUN...SW winds 5 to 10 kt. Waves 1 ft. .MON...W winds 5 to 10 kt...becoming S. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$