National Weather Service Marine Forecast FZUS51 KLWX

FZUS51 KLWX 022058
CWFLWX

Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
458 PM EDT Thu Jul 2 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.

ANZ500-030800
458 PM EDT Thu Jul 2 2026

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

A broad area of hot high pressure will remain near the Mid-Atlantic through the weekend. The chance for strong thunderstorms increases Friday into early next week, with Special Marine Warnings possible.

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ANZ535-030800
Tidal Potomac from Key Bridge to Indian Head
458 PM EDT Thu Jul 2 2026

REST OF THIS AFTERNOON
W winds 5 kt. Waves less than 1 ft.

TONIGHT
SW winds around 5 kt. Waves 1 ft.

FRI
W winds around 5 kt. Waves 1 ft.

FRI NIGHT
W winds around 5 kt. Waves 1 ft or less.

SAT
NW winds around 5 kt. Waves 1 ft. A chance of showers and tstms.

SAT NIGHT
W winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms.

SUN
E winds around 5 kt. Waves 1 ft. Showers and tstms likely through the night. Showers likely with a chance of tstms after midnight.

MON
E winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning, then showers likely with a chance of tstms.

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

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ANZ536-030800
Tidal Potomac from Indian Head to Cobb Island
458 PM EDT Thu Jul 2 2026

REST OF THIS AFTERNOON
S winds 10 kt. Waves 1 ft.

TONIGHT
SW winds around 5 kt. Waves 1 ft.

FRI
W winds around 5 kt. Waves 1 ft.

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

SAT
W winds around 5 kt. Waves 1 ft. A chance of showers and tstms.

SAT NIGHT
W winds around 5 kt. Waves 1 ft. A chance of showers and tstms.

SUN
E winds around 5 kt. Waves 1 ft or less. Showers and tstms likely through the night. Showers likely with a chance of tstms after midnight.

MON
E winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms.

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

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ANZ537-030800
Tidal Potomac from Cobb Island to Smith Point
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
SE winds 10 kt. Waves 1 ft.

TONIGHT
S winds 5 to 10 kt. Waves 1 ft.

FRI
SW winds around 5 kt. Waves 1 ft.

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

SAT
W winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms.

SAT NIGHT
SW winds around 5 kt. Waves 1 ft. A chance of showers and tstms.

SUN
NE winds around 5 kt...becoming SE. Waves 1 ft or less. A chance of showers and tstms through the night. A chance of tstms after midnight.

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

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

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ANZ530-030800
Chesapeake Bay north of Pooles Island
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
SW winds 10 kt. Waves 1 ft.

TONIGHT
SW winds 5 to 10 kt. Gusts up to 20 kt in the evening. Waves 1 ft.

FRI
W winds around 5 kt...becoming SW late. Waves 1 ft.

FRI NIGHT
W winds around 5 kt. Waves 1 ft.

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

SAT NIGHT
W winds 5 to 10 kt...becoming N after midnight. Waves 1 ft. A chance of showers and tstms.

SUN
E winds around 5 kt. Waves 1 ft. Showers likely with a chance of tstms.

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

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

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ANZ531-030800
Chesapeake Bay from Pooles Island to Sandy Point
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 15 kt. Waves 1 ft.

TONIGHT
S winds 10 to 15 kt with gusts to 20 kt... becoming W 5 kt after midnight. Waves 1 to 2 ft.

FRI
W winds around 5 kt...becoming S late. Waves 1 ft or less.

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

SAT
W winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.

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

SUN
E winds 5 to 10 kt. Waves 1 ft or less. Showers with a chance of tstms.

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

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

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ANZ538-030800
Patapsco River including Baltimore Harbor
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 10 kt. Waves 1 ft.

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

FRI
SE winds around 5 kt. Waves flat.

FRI NIGHT
W winds around 5 kt. Waves flat.

SAT
W winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.

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

SUN
E winds around 5 kt. Waves 1 ft or less. Showers likely with a chance of tstms.

MON
E winds 5 to 10 kt. Waves 1 ft. A chance of tstms. A chance of showers in the morning, then showers likely.

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

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ANZ539-030800
Chester River to Queenstown MD
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
SW winds 10 kt. Waves 1 ft.

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

FRI
W winds around 5 kt. Waves 1 ft or less.

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

SAT
W winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.

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

SUN
E winds 5 kt. Waves flat. A chance of showers and tstms in the afternoon. Showers with a chance of tstms through the night.

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

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

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ANZ532-030800
Chesapeake Bay from Sandy Point to North Beach
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 15 kt with gusts to 20 kt. Waves 2 ft.

TONIGHT
S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft.

FRI
W winds around 5 kt...becoming S late. Waves 1 ft.

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

SAT
W winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.

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

SUN
NE winds around 5 kt...becoming SE. Waves 1 ft or less. A chance of showers and tstms in the afternoon. Showers likely with a chance of tstms through the night.

MON
E winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning, then showers likely with a chance of tstms.

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

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ANZ540-030800
Eastern Bay
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
SW winds 10 kt. Waves 1 ft.

TONIGHT
SW winds 5 to 10 kt. Gusts up to 20 kt early in the evening. Waves 1 ft.

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

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

SAT
W winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms.

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

SUN
E winds 5 kt. Waves less than 1 ft. A chance of showers and tstms in the afternoon. Showers likely with a chance of tstms through the night.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning, then showers likely with a chance of tstms.

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

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ANZ533-030800
Chesapeake Bay from North Beach to Drum Point
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 15 kt with gusts to 20 kt. Waves 2 ft.

TONIGHT
S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt after midnight. Waves 1 to 2 ft.

FRI
NW winds around 5 kt...becoming S late. Waves 1 ft.

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

SAT
NW winds around 5 kt...becoming SW in the afternoon. Waves 1 ft or less. A chance of showers and tstms.

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

SUN
NE winds around 5 kt...becoming E. Waves 1 ft or less. A chance of showers and tstms in the afternoon. Showers likely with a chance of tstms through the night.

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

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

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ANZ541-030800
Choptank River to Cambridge MD and the Little Choptank River
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 10 kt. Waves 1 ft.

TONIGHT
S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 kt late. Waves 1 ft.

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

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

SAT
W winds around 5 kt. Waves 1 ft or less. A chance of showers and tstms.

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

SUN
NE winds around 5 kt...becoming E. Waves 1 ft or less. A chance of showers and tstms in the afternoon. Showers likely with a chance of tstms through the night.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning, then showers likely with a chance of tstms.

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

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ANZ542-030800
Patuxent River to Broomes Island MD
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 10 kt. Waves 1 ft.

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

FRI
NW winds around 5 kt. Waves 1 ft.

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

SAT
W winds around 5 kt. Waves 1 ft. A chance of showers and tstms.

SAT NIGHT
SW winds around 5 kt. Waves 1 ft. A chance of showers and tstms.

SUN
E winds around 5 kt. Waves 1 ft. A chance of showers and tstms in the afternoon. Showers likely with a chance of tstms through the night.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers in the morning, then showers likely with a chance of tstms.

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

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ANZ534-030800
Chesapeake Bay from Drum Point to Smith Point
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 15 kt with gusts to 20 kt. Waves 2 ft.

TONIGHT
S winds 10 to 15 kt with gusts to 20 kt... becoming SW 5 to 10 kt late. Waves 2 ft.

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

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

SAT
SW winds 5 to 10 kt. Waves 1 ft. A chance of showers.

SAT NIGHT
S winds 5 to 10 kt...becoming W after midnight. Waves 1 ft. A chance of showers and tstms.

SUN
E winds around 5 kt...becoming SE. Waves 1 ft. A chance of showers and tstms.

MON
SE winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers through the day. A chance of tstms. Showers likely through the night.

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

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ANZ543-030800
Tangier Sound and the inland waters surrounding Bloodsworth Island
458 PM EDT Thu Jul 2 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT FRIDAY

REST OF THIS AFTERNOON
S winds 10 kt with gusts to 20 kt. Waves 1 ft.

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

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

SUN
SE winds 5 to 10 kt. Waves 1 ft or less. A chance of showers and tstms through the night.

MON
SE winds 5 to 10 kt. Waves 1 ft. A chance of showers through the day. A chance of tstms. Showers likely through the night.

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