National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 041735
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
135 PM EDT Fri Apr 4 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.

ANZ500-050800
135 PM EDT Fri Apr 4 2025

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

A front will oscillate across the Mid Atlantic through Saturday. Another area of low pressure and the accompanying cold front will move through on Sunday. A secondary reinforcing cold front tracks through the waters Monday night. Small Craft Advisories may be needed Saturday night through early Monday and again on Tuesday. Boaters should be aware of the threats of boating in cold water, even when air temperatures are warm. Visit weather.gov/safety/coldwater for more information.

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ANZ535-050800
Tidal Potomac from Key Bridge to Indian Head
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
E winds around 5 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers and tstms.

SAT
SE winds 5 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 5 to 10 kt. Waves 1 ft. Scattered showers.

SUN
SW winds 10 kt...becoming N in the afternoon. Gusts up to 20 kt. Waves 1 ft. Showers.

SUN NIGHT
NE winds 5 to 10 kt. Waves 1 ft in the evening. Showers.

MON
NW winds 5 to 10 kt. Waves 1 ft. Showers, mainly in the morning.

TUE
NW winds 10 to 15 kt...diminishing to 5 kt after midnight. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ536-050800
Tidal Potomac from Indian Head to Cobb Island
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
E winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers and tstms.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

SUN
SW winds 10 to 15 kt...becoming NW in the afternoon. Gusts up to 20 kt. Waves 1 ft. Showers.

SUN NIGHT
NE winds 5 to 10 kt. Waves 1 ft in the evening. Showers.

MON
N winds 5 to 10 kt. Waves 1 ft. A chance of showers through the day.

TUE
NW winds 10 to 15 kt. Waves 1 to 2 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ537-050800
Tidal Potomac from Cobb Island to Smith Point
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
E winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers and tstms.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.

SUN
SW winds 15 to 20 kt...becoming W 10 to 15 kt in the afternoon. Waves 2 ft. Numerous showers.

SUN NIGHT
NE winds 10 to 15 kt. Waves 1 ft in the evening. Showers.

MON
N winds 10 to 15 kt...becoming NW after midnight. Waves 1 to 2 ft. Showers, mainly in the morning.

TUE
NW winds 15 to 20 kt. Waves 2 to 3 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ530-050800
Chesapeake Bay north of Pooles Island
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Isolated sprinkles.

TONIGHT
NE winds around 5 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
SE winds 5 to 10 kt. Waves 1 ft or less. Scattered showers.

SUN
W winds 10 to 15 kt...becoming N in the afternoon. Waves 1 ft. Showers.

SUN NIGHT
N winds 5 to 10 kt. Waves 1 ft in the evening. Showers.

MON
NW winds 10 to 15 kt. Waves 1 ft or less. Showers, mainly in the morning.

TUE
NW winds 15 to 20 kt...diminishing to 5 to 10 kt after midnight. Waves 2 ft.

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ANZ531-050800
Chesapeake Bay from Pooles Island to Sandy Point
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Isolated showers.

TONIGHT
NE winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
SE winds 5 to 10 kt. Waves 1 ft. Scattered showers.

SUN
SW winds 10 to 15 kt...becoming N in the afternoon. Waves 1 to 2 ft. Showers.

SUN NIGHT
NE winds 10 kt. Waves 1 ft in the evening. Showers.

MON
NW winds 10 to 15 kt. Waves 1 ft. Showers, mainly in the morning.

TUE
NW winds 15 to 20 kt. Waves 2 to 3 ft.

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ANZ538-050800
Patapsco River including Baltimore Harbor
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Isolated showers.

TONIGHT
E winds around 5 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
SE winds 5 to 10 kt. Waves 1 ft or less. Scattered showers.

SUN
W winds 10 kt...becoming N in the afternoon. Waves 1 ft. Showers.

SUN NIGHT
N winds 5 to 10 kt. Waves 1 ft in the evening. Showers.

MON
NW winds 5 to 10 kt. Waves 1 ft or less. Showers, mainly in the morning.

TUE
NW winds 10 to 15 kt. Waves 1 ft.

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ANZ539-050800
Chester River to Queenstown MD
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Isolated showers.

TONIGHT
NE winds 5 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 5 to 10 kt. Waves 1 ft. Scattered showers.

SUN
SW winds 10 to 15 kt...becoming N in the afternoon. Gusts up to 20 kt. Waves 2 ft. Showers.

SUN NIGHT
NE winds 10 kt. Waves 1 ft in the evening. Showers.

MON
NW winds 10 to 15 kt. Waves 1 ft. Showers, mainly in the morning.

TUE
NW winds 15 to 20 kt. Waves 2 to 3 ft.

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ANZ532-050800
Chesapeake Bay from Sandy Point to North Beach
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
NE winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 10 to 15 kt. Gusts up to 20 kt. Waves 1 to 2 ft.

SUN
SW winds 10 to 15 kt...becoming N in the afternoon. Gusts up to 20 kt. Waves 2 ft. Showers.

SUN NIGHT
NE winds 10 to 15 kt. Waves 1 ft in the evening. Showers.

MON
N winds 10 to 15 kt...becoming NW. Waves 1 ft. A chance of showers through the day.

TUE
NW winds 15 to 20 kt. Waves 2 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ540-050800
Eastern Bay
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
NE winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

SUN
SW winds 10 to 15 kt...becoming N in the afternoon. Gusts up to 20 kt. Waves 1 to 2 ft. Showers.

SUN NIGHT
NE winds 10 kt. Waves 1 ft in the evening. Showers.

MON
NW winds 10 to 15 kt. Waves 1 ft. Showers, mainly in the morning.

TUE
NW winds 15 to 20 kt. Waves 2 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ533-050800
Chesapeake Bay from North Beach to Drum Point
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
E winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.

SUN
SW winds 15 to 20 kt...becoming NW 10 to 15 kt in the afternoon. Waves 2 ft. Showers.

SUN NIGHT
NE winds 10 to 15 kt. Waves 2 ft in the evening. Showers.

MON
N winds 10 to 15 kt...becoming NW after midnight. Waves 1 to 2 ft. Showers, mainly in the morning.

TUE
NW winds 15 to 20 kt. Waves 2 to 3 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ541-050800
Choptank River to Cambridge MD and the Little Choptank River
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Isolated showers and tstms.

TONIGHT
E winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft.

SUN
SW winds 15 kt...becoming NW in the afternoon. Gusts up to 20 kt. Waves 2 ft. Numerous showers.

SUN NIGHT
NE winds 10 to 15 kt. Waves 1 ft in the evening. Showers.

MON
N winds 10 to 15 kt...becoming NW after midnight. Waves 1 ft. Showers, mainly in the morning.

TUE
NW winds 15 to 20 kt. Waves 2 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ542-050800
Patuxent River to Broomes Island MD
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
E winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers and tstms.

SAT
SE winds 5 to 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.

SUN
SW winds 10 to 15 kt...becoming NW in the afternoon. Gusts up to 20 kt. Waves 1 ft. Numerous showers.

SUN NIGHT
NE winds 5 to 10 kt. Waves 1 ft in the evening. Showers.

MON
N winds 5 to 10 kt. Waves 1 ft. Showers, mainly in the morning.

TUE
NW winds 10 to 15 kt. Waves 1 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ534-050800
Chesapeake Bay from Drum Point to Smith Point
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Scattered showers with isolated tstms.

TONIGHT
E winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers and tstms. Vsby 1 NM or less.

SAT
SE winds 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 15 to 20 kt. Waves 2 to 3 ft.

SUN
SW winds 15 to 20 kt...becoming W 10 to 15 kt in the afternoon. Waves 3 ft. Numerous showers.

SUN NIGHT
NE winds 10 to 15 kt. Waves 2 ft in the evening. Showers.

MON
N winds 10 to 15 kt...becoming NW after midnight. Waves 1 to 2 ft. Showers through the day, then a chance of showers through the night.

TUE
NW winds 15 to 20 kt. Waves 3 ft.

Winds and waves higher and visibilities lower in and near tstms.

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ANZ543-050800
Tangier Sound and the inland waters surrounding Bloodsworth Island
135 PM EDT Fri Apr 4 2025

THIS AFTERNOON
N winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 17:00:00 GMT, Apr 04 25 22:00:00 GMT)*|. Isolated showers and tstms.

TONIGHT
E winds 5 to 10 kt. |* Insufficient grids for WaveHeight during (Apr 04 25 22:00:00 GMT, Apr 05 25 10:00:00 GMT)*|. Scattered showers and tstms. Vsby 1 NM or less.

SAT
SE winds 10 kt. Waves 1 ft in the afternoon. Scattered showers.

SAT NIGHT
S winds 15 to 20 kt. Waves 2 ft.

SUN
SW winds 15 to 20 kt...becoming W 10 to 15 kt in the afternoon. Gusts up to 25 kt. Waves 2 ft. Numerous showers.

SUN NIGHT
NE winds 10 to 15 kt. Waves 1 ft in the evening. Showers.

MON
N winds 10 to 15 kt...becoming NW after midnight. Waves 1 to 2 ft. Showers through the day, then a chance of showers through the night.

TUE
NW winds 15 to 20 kt. Waves 2 ft.

Winds and waves higher and visibilities lower in and near tstms.