HomeForecastsVirginia ForecastsDahlgren, VA - Upper Machodoc Creek, Va. Coastal Forecast

Dahlgren, VA - Upper Machodoc Creek, Va. Coastal Forecast

FZUS51 KLWX 252334
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
734 PM EDT Mon Aug 25 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.

ANZ500-260800-
734 PM EDT Mon Aug 25 2025

.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...

High pressure will build over the Mid-Atlantic this week. A cold
front likely crosses the region Friday. Small Craft Advisories may
be needed Tuesday night into Wednesday, Thursday into Thursday
night, and again on Friday.

$$

ANZ535-260800-
Tidal Potomac from Key Bridge to Indian Head-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...NW winds 5 kt. Waves less than 1 ft.
.WED...NW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft or less.
.THU...SW winds around 5 kt. Waves 1 ft.
.THU NIGHT...S winds 5 kt. Waves less than 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft.
.SAT...N winds around 5 kt. Waves 1 ft.

$$

ANZ536-260800-
Tidal Potomac from Indian Head to Cobb Island-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 kt. Waves less than 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft or less.
.THU...SW winds around 5 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft.
.SAT...N winds around 5 kt. Waves 1 ft.

$$

ANZ537-260800-
Tidal Potomac from Cobb Island to Smith Point-
734 PM EDT Mon Aug 25 2025

.TONIGHT...N winds 10 kt. Waves 1 to 2 ft. Isolated showers this
evening.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ530-260800-
Chesapeake Bay north of Pooles Island-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft or less.

$$

ANZ531-260800-
Chesapeake Bay from Pooles Island to Sandy Point-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt...becoming SW in the afternoon. Waves
1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft.

$$

ANZ538-260800-
Patapsco River including Baltimore Harbor-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.TUE...NW winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft or less.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...SW winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt. Waves 1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft or less.

$$

ANZ539-260800-
Chester River to Queenstown MD-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 to 10 kt...becoming N after midnight. Waves 1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft.

$$

ANZ532-260800-
Chesapeake Bay from Sandy Point to North Beach-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 10 kt. Waves 1 ft.
.TUE...N winds 5 to 10 kt...becoming SW late. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 kt. Waves 2 ft.
.FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft.

$$

ANZ540-260800-
Eastern Bay-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 10 kt. Waves 1 ft.
.TUE...NW winds 5 to 10 kt...becoming SW late. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 10 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft.
.SAT...N winds 5 to 10 kt. Waves 1 ft.

$$

ANZ533-260800-
Chesapeake Bay from North Beach to Drum Point-
734 PM EDT Mon Aug 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM EDT
TUESDAY...

.TONIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt late this evening
and overnight. Waves 1 to 2 ft.
.TUE...N winds 5 to 10 kt. Waves 1 to 2 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft or less.
.THU NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ541-260800-
Choptank River to Cambridge MD and the Little Choptank River-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt late this evening
and overnight. Waves 1 ft.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 1 ft.
.FRI...W winds 5 to 10 kt...becoming N. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ542-260800-
Patuxent River to Broomes Island MD-
734 PM EDT Mon Aug 25 2025

.TONIGHT...NW winds 5 to 10 kt. Waves 1 ft. Isolated showers this
evening.
.TUE...NW winds 5 kt. Waves less than 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds around 5 kt. Waves 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 5 to 10 kt. Waves 1 ft.
.FRI...NW winds 5 kt. Waves less than 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.

$$

ANZ534-260800-
Chesapeake Bay from Drum Point to Smith Point-
734 PM EDT Mon Aug 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM EDT
TUESDAY...

.TONIGHT...NW winds 10 to 15 kt. Gusts up to 20 kt after midnight.
Waves 1 to 2 ft. Isolated showers this evening.
.TUE...N winds 10 to 15 kt...becoming NW 5 kt late. Waves 1 to 2 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 to 2 ft.
.WED...N winds 5 to 10 kt. Waves 2 ft.
.WED NIGHT...W winds 5 kt. Waves less than 1 ft.
.THU...SW winds 5 to 10 kt. Waves 1 to 2 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.FRI...W winds 5 to 10 kt...becoming N. Waves 1 to 2 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 to 2 ft.

$$

ANZ543-260800-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
734 PM EDT Mon Aug 25 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM EDT
TUESDAY...

.TONIGHT...NW winds 5 to 10 kt with gusts to 20 kt... becoming N
15 kt with gusts to 20 kt late. Waves 1 ft. Isolated showers this
evening.
.TUE...NW winds 5 to 10 kt. Waves 1 ft.
.TUE NIGHT...NW winds 5 to 10 kt. Waves 1 ft.
.WED...NW winds 5 to 10 kt. Waves 1 ft.
.WED NIGHT...W winds 5 to 10 kt. Waves 1 ft or less.
.THU...SW winds 5 to 10 kt. Waves 1 ft.
.THU NIGHT...S winds 10 to 15 kt. Waves 2 ft.
.FRI...W winds 10 kt...becoming N. Waves 1 ft.
.SAT...NE winds 5 to 10 kt. Waves 1 ft.

$$



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