National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 120258
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
1058 PM EDT Thu Jun 11 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.

ANZ500-120800
1058 PM EDT Thu Jun 11 2026

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

A surface trough will linger near the Chesapeake Bay today. Scattered showers and thunderstorms this afternoon and evening, a few of which could bring damaging winds gusts. A cold front brings potential for more widespread severe thunderstorms Friday into Friday night. Small Craft Advisories may be needed in the wake of the front Friday night into Saturday morning, and then again in southerly channeling on Sunday. Gusty winds and rain chances could return Sunday afternoon.

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ANZ535-120800
Tidal Potomac from Key Bridge to Indian Head
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
Light winds. Waves 1 ft or less. Isolated showers and tstms late this evening.

FRI
W winds 5 to 10 kt. Waves 1 ft. Showers and tstms.

FRI NIGHT
NW winds 5 kt. Waves less than 1 ft. Showers and tstms.

SAT
NW winds around 5 kt. Waves 1 ft.

SAT NIGHT
S winds around 5 kt. Waves 1 ft.

SUN
S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Showers likely with a chance of tstms.

SUN NIGHT
W winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.

MON
N winds 5 to 10 kt. Waves 1 ft or less.

TUE
S winds around 5 kt. Waves 1 ft. A chance of showers through the day.

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

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ANZ536-120800
Tidal Potomac from Indian Head to Cobb Island
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening.

FRI
SW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.

FRI NIGHT
NW winds 5 to 10 kt. Waves 1 ft. Showers and tstms.

SAT
NW winds around 5 kt. Waves 1 ft.

SAT NIGHT
S winds around 5 kt. Waves 1 ft or less.

SUN
S winds 5 to 10 kt. Waves 1 ft. Showers likely with a chance of tstms.

SUN NIGHT
SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of showers and tstms.

MON
NW winds 5 to 10 kt...becoming E. Waves 1 ft or less.

TUE
SE winds around 5 kt. Waves 1 ft or less. A chance of showers through the day.

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

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ANZ537-120800
Tidal Potomac from Cobb Island to Smith Point
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then a slight chance of showers with isolated tstms.

FRI
SW winds 5 kt. Waves less than 1 ft.

FRI NIGHT
SE winds 5 to 10 kt...becoming NW in the late evening and overnight. Waves 1 ft. A chance of showers and tstms.

SAT
N winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
S winds around 5 kt. Waves 1 ft or less.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt...becoming W 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

MON
NW winds 5 to 10 kt...becoming SW. Waves 1 ft or less. A chance of showers after midnight.

TUE
SE winds around 5 kt. Waves 1 ft. A chance of showers.

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

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ANZ530-120800
Chesapeake Bay north of Pooles Island
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then isolated showers and tstms.

FRI
W winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely.

FRI NIGHT
NW winds 5 to 10 kt. Waves 1 ft. A chance of showers and tstms.

SAT
NW winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
SW winds around 5 kt. Waves 1 ft.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. A chance of showers and tstms.

SUN NIGHT
SW winds 10 to 15 kt...becoming NW 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 1 ft. Showers likely with a chance of tstms.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

TUE
S winds around 5 kt. Waves 1 ft or less.

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

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ANZ531-120800
Chesapeake Bay from Pooles Island to Sandy Point
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then isolated showers and tstms.

FRI
SW winds 5 to 10 kt. Waves 1 ft. Showers and tstms likely.

FRI NIGHT
NW winds 5 to 10 kt. Waves 1 ft. Showers and tstms.

SAT
NW winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
SW winds around 5 kt. Waves flat.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

SUN NIGHT
SW winds 10 to 15 kt...becoming NW after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

TUE
NE winds around 5 kt...becoming S. Waves 1 ft or less.

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

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ANZ538-120800
Patapsco River including Baltimore Harbor
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 5 kt. Waves flat. Scattered showers and tstms late this evening.

FRI
W winds 5 to 10 kt. Waves 1 ft or less. Showers and tstms likely.

FRI NIGHT
NW winds 5 to 10 kt. Waves 1 ft. Showers and tstms.

SAT
NW winds 5 kt. Waves flat.

SAT NIGHT
SW winds around 5 kt. Waves flat.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. Showers likely with a chance of tstms.

SUN NIGHT
W winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Showers likely with a chance of tstms.

MON
NW winds around 5 kt. Waves 1 ft or less.

TUE
S winds around 5 kt. Waves 1 ft or less.

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

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ANZ539-120800
Chester River to Queenstown MD
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then isolated showers and tstms.

FRI
SW winds 5 kt. Waves less than 1 ft. A chance of tstms.

FRI NIGHT
NW winds 5 to 10 kt. Waves 1 ft. Showers and tstms.

SAT
NW winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
S winds around 5 kt. Waves flat.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

SUN NIGHT
SW winds 10 to 15 kt...becoming NW 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

MON
NW winds 5 to 10 kt. Waves 1 ft or less.

TUE
S winds around 5 kt. Waves 1 ft or less. A chance of showers through the day.

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

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ANZ532-120800
Chesapeake Bay from Sandy Point to North Beach
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then isolated showers and tstms.

FRI
SW winds 5 kt. Waves less than 1 ft. A chance of tstms.

FRI NIGHT
SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. Showers and tstms.

SAT
N winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
S winds 5 kt. Waves less than 1 ft.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft... building to 3 ft in the afternoon. Showers likely with a chance of tstms.

SUN NIGHT
SW winds 10 to 15 kt...becoming NW after midnight. Gusts up to 20 kt. Waves 3 ft...subsiding to 1 ft after midnight. Showers likely with a chance of tstms.

MON
NW winds 5 to 10 kt...becoming W. Waves 1 ft or less.

TUE
NE winds 5 kt...becoming S. Waves 1 ft or less. A chance of showers through the day.

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

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ANZ540-120800
Eastern Bay
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
SW winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then isolated showers and tstms.

FRI
SW winds 5 kt. Waves less than 1 ft. A chance of tstms.

FRI NIGHT
W winds 5 to 10 kt...becoming NW late. Waves 1 ft. Showers and tstms.

SAT
NW winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
S winds around 5 kt. Waves flat.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

SUN NIGHT
SW winds 10 to 15 kt...becoming NW 5 to 10 kt after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

MON
NW winds 5 to 10 kt...becoming W. Waves 1 ft or less.

TUE
S winds around 5 kt. Waves 1 ft or less. A chance of showers through the day.

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

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ANZ533-120800
Chesapeake Bay from North Beach to Drum Point
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then a slight chance of showers with isolated tstms.

FRI
SW winds 5 to 10 kt. Waves 1 ft or less.

FRI NIGHT
SW winds 5 to 10 kt...becoming NW after midnight. Waves 1 ft. A chance of showers and tstms.

SAT
N winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
S winds around 5 kt. Waves 1 ft or less.

SUN
S winds 5 to 10 kt...increasing to 15 to 20 kt in the afternoon. Waves 1 ft...building to 3 ft in the afternoon. Showers likely with a chance of tstms.

SUN NIGHT
S winds 15 to 20 kt...becoming NW 10 kt after midnight. Waves 3 ft...subsiding to 1 ft after midnight. Showers likely with a chance of tstms.

MON
NW winds 10 to 15 kt...becoming W 5 kt. Waves 1 to 2 ft... subsiding to flat after midnight.

TUE
E winds 5 to 10 kt...becoming S. Waves 1 ft or less. A chance of showers through the day.

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

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ANZ541-120800
Choptank River to Cambridge MD and the Little Choptank River
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then a slight chance of showers with isolated tstms.

FRI
SW winds 5 kt. Waves less than 1 ft.

FRI NIGHT
W winds 5 to 10 kt...becoming NW late. Waves 1 ft. Showers and tstms.

SAT
N winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
S winds around 5 kt. Waves 1 ft or less.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt...becoming NW after midnight. Gusts up to 20 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

MON
NW winds 10 to 15 kt...becoming W around 5 kt. Waves 1 ft or less.

TUE
E winds 5 kt...becoming S. Waves 1 ft or less. A chance of showers through the day.

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

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ANZ542-120800
Patuxent River to Broomes Island MD
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 5 kt. Waves less than 1 ft. Scattered showers and tstms late this evening, then a slight chance of showers with isolated tstms.

FRI
SW winds 5 kt. Waves less than 1 ft.

FRI NIGHT
NW winds 5 kt. Waves less than 1 ft. A chance of showers and tstms.

SAT
N winds 5 kt. Waves less than 1 ft.

SAT NIGHT
S winds around 5 kt. Waves 1 ft.

SUN
S winds 5 to 10 kt with gusts to 20 kt. Waves 1 ft. Showers likely with a chance of tstms.

SUN NIGHT
S winds 5 to 10 kt with gusts to 20 kt... becoming W after midnight. Waves 1 ft. Showers likely with a chance of tstms.

MON
NW winds 5 to 10 kt...becoming W. Waves 1 ft. A chance of showers after midnight.

TUE
SE winds around 5 kt. Waves 1 ft. A chance of showers.

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

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ANZ534-120800
Chesapeake Bay from Drum Point to Smith Point
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 5 to 10 kt. Waves 1 ft. Scattered showers with isolated tstms late this evening, then a slight chance of showers.

FRI
SW winds 5 to 10 kt. Waves 1 ft.

FRI NIGHT
S winds 5 to 10 kt...becoming NW in the late evening and overnight. Waves 1 to 2 ft. Showers and tstms likely.

SAT
N winds 5 to 10 kt. Waves 1 to 2 ft.

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

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft... building to 3 ft in the afternoon. Showers likely with a chance of tstms.

SUN NIGHT
S winds 10 to 15 kt...becoming W after midnight. Gusts up to 20 kt. Waves 2 to 3 ft. Showers likely with a chance of tstms.

MON
N winds 10 to 15 kt...becoming S 5 kt. Waves 1 to 2 ft. A chance of showers after midnight.

TUE
E winds 5 to 10 kt...becoming SW after midnight. Waves 1 ft. A chance of showers.

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

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ANZ543-120800
Tangier Sound and the inland waters surrounding Bloodsworth Island
1058 PM EDT Thu Jun 11 2026

REST OF TONIGHT
W winds 10 kt. Waves 1 ft. Scattered showers with isolated tstms late this evening, then a slight chance of showers.

FRI
SW winds 5 to 10 kt. Waves 1 ft.

FRI NIGHT
W winds 5 to 10 kt...becoming NW late. Waves 1 ft. Showers and tstms likely.

SAT
NW winds 5 to 10 kt. Waves 1 ft.

SAT NIGHT
SW winds 5 to 10 kt. Waves 1 ft or less.

SUN
S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers and tstms.

SUN NIGHT
S winds 10 to 15 kt...becoming W after midnight. Gusts up to 20 kt. Waves 2 ft. Showers likely with a chance of tstms.

MON
NW winds 10 to 15 kt...becoming S 5 kt. Waves 1 ft or less. A chance of showers after midnight.

TUE
SE winds 5 to 10 kt...becoming S after midnight. Waves 1 ft or less. A chance of showers.

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