FZUS51 KLWX 162058 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 458 PM EDT Fri Oct 16 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. ANZ500-170800- 458 PM EDT Fri Oct 16 2026 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... A cold front approaching from the Ohio River Valley will cross the Mid-Atlantic through this evening. High pressure will build in from the central U.S. for the weekend, then linger early next week as low pressure develops and meanders off the Carolina coast. Additional Small Craft Advisories may be needed Sunday into early next week. $$ ANZ535-170800- Tidal Potomac from Key Bridge to Indian Head- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 25 kt. Waves 1 ft. A slight chance of tstms with isolated showers. .TONIGHT...NW winds 10 to 15 kt. Gusts up to 25 kt. Waves 1 ft. Numerous showers. .SAT...N winds 10 to 15 kt with gusts to 30 kt. Waves 2 ft. Scattered showers. .SAT NIGHT...N winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 ft. .SUN...NE winds 5 to 10 kt. Waves 1 ft. .SUN NIGHT...NE winds 10 to 15 kt. Waves 1 ft. .MON...N winds 10 to 15 kt. Waves 1 ft. A chance of showers. .TUE...N winds 10 to 15 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-170800- Tidal Potomac from Indian Head to Cobb Island- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH SATURDAY EVENING... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. A slight chance of tstms. .TONIGHT...W winds 10 to 15 kt...becoming NW in the late evening and overnight. Gusts up to 25 kt. Waves 2 ft. Showers with a chance of tstms. .SAT...N winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Numerous showers. .SAT NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. .SUN...N winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SUN NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. .MON...N winds 15 to 20 kt. Waves 2 ft. A chance of showers. .TUE...N winds 15 to 20 kt. Waves 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-170800- Tidal Potomac from Cobb Island to Smith Point- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...SW winds 10 to 15 kt...becoming NW 15 to 20 kt in the late evening and overnight. Gusts up to 30 kt. Waves 2 to 3 ft. Showers. .SAT...N winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft. Showers. .SAT NIGHT...N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft. .SUN...NE winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft. .SUN NIGHT...NE winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft. A chance of showers. .MON...N winds 25 to 30 kt. Waves 4 ft. A chance of showers. .TUE...N winds 20 to 25 kt. Waves 4 ft. A chance of showers. $$ ANZ530-170800- Chesapeake Bay north of Pooles Island- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 15 kt with gusts to 20 kt. Waves 1 ft. Scattered showers with a slight chance of tstms. .TONIGHT...W winds 10 to 15 kt...becoming NW 15 to 20 kt late. Gusts up to 25 kt. Waves 2 ft. Showers. .SAT...N winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Scattered showers. .SAT NIGHT...N winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft. .SUN...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SUN NIGHT...NE winds 5 to 10 kt...becoming N 15 to 20 kt with gusts to 25 kt after midnight. Waves 1 to 2 ft. .MON...N winds 20 to 25 kt. Waves 2 ft. A chance of showers. .TUE...N winds 15 to 20 kt. Waves 1 to 2 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-170800- Chesapeake Bay from Pooles Island to Sandy Point- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves 2 ft. Scattered showers with a slight chance of tstms. .TONIGHT...NW winds 15 kt...increasing to 20 to 25 kt late. Gusts up to 30 kt. Waves 2 to 3 ft. Showers. .SAT...N winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft. Numerous showers. .SAT NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 2 to 3 ft. .SUN NIGHT...NE winds 10 to 15 kt...increasing to 20 to 25 kt after midnight. Waves 2 to 3 ft. .MON...N winds 20 to 25 kt. Waves 3 ft. A chance of showers. .TUE...N winds 20 to 25 kt. Waves 3 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-170800- Patapsco River including Baltimore Harbor- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. Scattered showers with a chance of tstms. .TONIGHT...W winds 10 to 15 kt...becoming NW late. Gusts up to 25 kt. Waves 1 ft. Showers with a chance of tstms. .SAT...N winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft. Numerous showers. .SAT NIGHT...N winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. .SUN...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .SUN NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .MON...N winds 10 to 15 kt. Waves 1 ft. A chance of showers. .TUE...N winds 10 to 15 kt. Waves 1 ft. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-170800- Chester River to Queenstown MD- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt...increasing to 15 to 20 kt late. Gusts up to 30 kt. Waves 2 to 3 ft. Showers. .SAT...N winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft. Numerous showers. .SAT NIGHT...N winds 15 to 20 kt. Gusts up to 30 kt... diminishing to 20 kt after midnight. Waves 2 to 3 ft. .SUN...NE winds 15 to 20 kt. Gusts up to 25 kt in the morning. Waves 2 ft. .SUN NIGHT...NE winds 10 kt...increasing to 15 to 20 kt with gusts to 25 kt after midnight. Waves 1 to 2 ft. .MON...N winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers. .TUE...N winds 15 to 20 kt. Waves 2 to 3 ft. A chance of showers in the morning. $$ ANZ532-170800- Chesapeake Bay from Sandy Point to North Beach- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT... .REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves 2 ft. A slight chance of tstms. .TONIGHT...W winds 15 to 20 kt...becoming NW 20 to 25 kt late. Gusts up to 30 kt. Waves 2 to 3 ft. Showers. .SAT...N winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft. Numerous showers. .SAT NIGHT...N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft. .SUN...NE winds 20 to 25 kt. Gusts up to 30 kt in the morning. Waves 3 ft. .SUN NIGHT...NE winds 15 to 20 kt...increasing to 25 to 30 kt after midnight. Waves 3 ft. .MON...N winds 25 to 30 kt. Waves 4 ft. A chance of showers. .TUE...N winds 25 to 30 kt. Waves 3 ft. A chance of showers in the morning. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-170800- Eastern Bay- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...NW winds 10 to 15 kt...increasing to 15 to 20 kt late. Gusts up to 30 kt. Waves 2 ft. Showers. .SAT...N winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft. Numerous showers. .SAT NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 2 to 3 ft. .SUN...NE winds 20 to 25 kt...diminishing to 10 to 15 kt in the afternoon. Waves 2 ft. .SUN NIGHT...NE winds 10 to 15 kt with gusts to 20 kt...increasing to 20 to 25 kt with gusts to 30 kt after midnight. Waves 1 to 2 ft. .MON...N winds 20 to 25 kt. Waves 2 ft. A chance of showers. .TUE...N winds 20 to 25 kt...diminishing to 15 to 20 kt. Waves 2 ft. A chance of showers through the day. $$ ANZ533-170800- Chesapeake Bay from North Beach to Drum Point- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT... .REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...W winds 15 kt...becoming NW 20 to 25 kt in the late evening and overnight. Gusts up to 30 kt. Waves 3 ft. Showers with a chance of tstms. .SAT...N winds 25 to 30 kt. Waves 5 ft. Numerous showers. .SAT NIGHT...N winds 20 to 25 kt with gusts to 30 kt. Waves 4 ft. .SUN...NE winds 25 to 30 kt...diminishing to 15 to 20 kt in the afternoon. Waves 4 ft. .SUN NIGHT...NE winds 25 to 30 kt. Waves 4 ft. .MON...N winds 25 to 30 kt. Waves 5 ft. A chance of showers. .TUE...N winds 25 to 30 kt. Waves 4 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-170800- Choptank River to Cambridge MD and the Little Choptank River- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...S winds 10 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...W winds 10 to 15 kt...becoming NW 20 to 25 kt in the late evening and overnight. Gusts up to 30 kt. Waves 2 to 3 ft. Showers with a chance of tstms. .SAT...N winds 25 to 30 kt. Waves 3 ft. Showers. .SAT NIGHT...N winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft. .SUN...NE winds 20 to 25 kt. Gusts up to 30 kt in the morning. Waves 2 to 3 ft. .SUN NIGHT...NE winds 15 to 20 kt...increasing to 25 to 30 kt after midnight. Waves 2 to 3 ft. .MON...N winds 25 to 30 kt. Waves 3 ft. A chance of showers. .TUE...N winds 20 to 25 kt. Waves 3 ft. A chance of showers through the day. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-170800- Patuxent River to Broomes Island MD- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE SATURDAY NIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... .REST OF THIS AFTERNOON...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. .TONIGHT...SW winds 10 to 15 kt...becoming NW in the late evening and overnight. Gusts up to 25 kt. Waves 1 ft. Showers with a chance of tstms. .SAT...N winds 15 to 20 kt with gusts to 35 kt. Waves 1 to 2 ft. Showers. .SAT NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 1 ft. .SUN...NE winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft. .SUN NIGHT...NE winds 15 to 20 kt with gusts to 30 kt. Waves 1 ft. A chance of showers. .MON...N winds 20 to 25 kt. Waves 1 ft. A chance of showers. .TUE...N winds 15 to 20 kt. Waves 1 ft. A chance of showers. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-170800- Chesapeake Bay from Drum Point to Smith Point- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT... .REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...SW winds 15 kt...becoming NW 20 to 25 kt in the late evening and overnight. Gusts up to 30 kt. Waves 3 ft. Showers. .SAT...N winds 25 to 30 kt. Waves 6 ft. Showers. .SAT NIGHT...N winds 20 to 25 kt with gusts to 35 kt. Waves 5 ft. .SUN...NE winds 25 to 30 kt. Waves 4 ft. .SUN NIGHT...NE winds 25 to 30 kt. Waves 4 ft. A chance of showers. .MON...N winds 25 to 30 kt. Waves 5 ft. A chance of showers. .TUE...N winds 25 to 30 kt. Waves 5 ft. A chance of showers. $$ ANZ543-170800- Tangier Sound and the inland waters surrounding Bloodsworth Island- 458 PM EDT Fri Oct 16 2026 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... ...SEVERE THUNDERSTORM WATCH 686 IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT... .REST OF THIS AFTERNOON...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...SW winds 15 to 20 kt...becoming NW 20 to 25 kt in the late evening and overnight. Gusts up to 30 kt. Waves 2 to 3 ft. Showers. .SAT...N winds 25 to 30 kt. Waves 3 ft. Showers. .SAT NIGHT...N winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft. .SUN...NE winds 25 to 30 kt. Waves 3 ft. .SUN NIGHT...NE winds 25 to 30 kt. Waves 3 ft. A chance of showers. .MON...N winds 25 to 30 kt. Waves 3 ft. A chance of showers. .TUE...N winds 20 to 25 kt. Waves 3 ft. A chance of showers. $$