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Conowingo, MD Coastal Forecast

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Coastal Waters Forecast
National Weather Service Baltimore MD/Washington DC
658 PM EST Sat Dec 27 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.

ANZ500-280900-
658 PM EST Sat Dec 27 2025

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

High pressure to the north will briefly gain control through Sunday
morning. A wave of low pressure will drive a strong cold front
across the area Sunday night into Monday. A clipper-type system
nears the waters by the middle of next week. Small Craft Advisories
will likely be needed Sunday night through Tuesday. Gale conditions
are possible Monday evening through Tuesday afternoon.

$$

ANZ535-280900-
Tidal Potomac from Key Bridge to Indian Head-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds around 5 kt. Waves 1 ft or less.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 10 to 15 kt. Gusts up to 20 kt... increasing to
25 kt late. Waves 1 ft. Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 15 to 20 kt with gusts to 30 kt. Waves 1 ft. A
chance of rain. Patchy fog.
.MON NIGHT...W winds 10 to 15 kt with gusts to 25 kt. Waves 1 ft.
.TUE...W winds 15 to 20 kt with gusts to 30 kt. Waves 1 ft.
.TUE NIGHT...W winds 10 to 15 kt. Gusts up to 25 kt in the evening.
Waves 1 ft.
.WED...W winds 5 to 10 kt. Waves 1 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.

$$

ANZ536-280900-
Tidal Potomac from Indian Head to Cobb Island-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt until early morning... becoming
light. Waves 1 ft or less.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 20 to 25 kt. Waves 2 ft.
.MON...SW winds 20 to 25 kt with gusts to 30 kt. Waves 2 ft. A
chance of rain.
.MON NIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
.TUE...W winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
.TUE NIGHT...W winds 10 to 15 kt. Gusts up to 20 kt in the evening.
Waves 1 ft.
.WED...SW winds 5 to 10 kt. Waves 1 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.

$$

ANZ537-280900-
Tidal Potomac from Cobb Island to Smith Point-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt. Waves 1 to 2 ft.
.SUN...SE winds around 5 kt...becoming S in the afternoon. Waves
1 ft or less.
.SUN NIGHT...S winds 15 to 20 kt. Gusts up to 25 kt late. Waves
2 ft. Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 20 kt with gusts to 30 kt. Waves 3 ft. A chance of
rain.
.MON NIGHT...W winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft.
.TUE...W winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft.
.TUE NIGHT...W winds 15 to 20 kt. Waves 1 to 2 ft.
.WED...SW winds 10 to 15 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt...becoming NW after midnight. Waves 1 to
2 ft.

$$

ANZ530-280900-
Chesapeake Bay north of Pooles Island-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt this evening...becoming light. Waves
1 ft or less.
.SUN...SE winds around 5 kt...becoming S late. Waves 1 ft. A chance
of rain. Vsby 1 to 3 NM.
.SUN NIGHT...S winds 15 to 20 kt. Waves 1 to 2 ft. A chance of rain.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 15 to 20 kt...becoming W 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Waves 2 ft. Rain likely. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 2 ft.
.TUE...W winds 20 to 25 kt with gusts to 30 kt. Waves 2 ft.
.TUE NIGHT...W winds 20 to 25 kt...diminishing to 10 to 15 kt after
midnight. Waves 1 to 2 ft.
.WED...W winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.

$$

ANZ531-280900-
Chesapeake Bay from Pooles Island to Sandy Point-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt until early morning... becoming
light. Waves 1 ft or less.
.SUN...SE winds 5 to 10 kt. Waves 1 ft or less. A chance of rain.
Patchy fog. Vsby 1 to 3 NM.
.SUN NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 to
3 ft. A chance of rain. Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 15 to 20 kt with gusts to 25 kt... becoming W 20 to
25 kt with gusts to 35 kt in the afternoon. Waves 3 ft. Rain likely.
Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE NIGHT...W winds 20 to 25 kt. Waves 2 to 3 ft.
.WED...W winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...W winds 10 to 15 kt...becoming NW after midnight. Waves 1 ft.


$$

ANZ538-280900-
Patapsco River including Baltimore Harbor-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt this evening...becoming light. Waves
1 ft or less.
.SUN...SE winds 5 to 10 kt. Waves 1 ft or less. A chance of rain.
.SUN NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 15 to 20 kt with gusts to 25 kt. Waves 1 to 2 ft.
Rain likely. Patchy fog.
.MON NIGHT...W winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
.TUE...W winds 15 to 20 kt with gusts to 30 kt. Waves 2 ft.
.TUE NIGHT...W winds 10 to 15 kt. Gusts up to 25 kt in the evening.
Waves 1 to 2 ft.
.WED...W winds 10 to 15 kt. Waves 1 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.

$$

ANZ539-280900-
Chester River to Queenstown MD-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt this evening...becoming light. Waves
1 ft or less.
.SUN...SE winds 5 to 10 kt. Waves 1 ft or less.
.SUN NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 15 to 20 kt...becoming W 20 to 25 kt in the
afternoon. Gusts up to 30 kt. Waves 3 ft. Rain likely. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE NIGHT...W winds 20 to 25 kt...diminishing to 15 kt after
midnight. Waves 2 to 3 ft.
.WED...W winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.

$$

ANZ532-280900-
Chesapeake Bay from Sandy Point to North Beach-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt. Waves 1 ft or less.
.SUN...SE winds 10 to 15 kt. Waves flat...building to 2 ft in the
afternoon.
.SUN NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 3 ft.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft. Rain
likely. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE NIGHT...W winds 20 to 25 kt. Waves 2 to 3 ft.
.WED...W winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...W winds 10 to 15 kt...becoming NW. Waves 1 to 2 ft.

$$

ANZ540-280900-
Eastern Bay-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt until early morning... becoming
light. Waves 1 ft or less.
.SUN...SE winds 5 to 10 kt. Waves 1 ft or less.
.SUN NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 15 to 20 kt with gusts to 30 kt. Waves 3 ft. Rain
likely. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft.
.TUE...W winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft.
.TUE NIGHT...W winds 20 to 25 kt...diminishing to 15 kt after
midnight. Waves 2 ft.
.WED...W winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...W winds 10 to 15 kt. Waves 1 ft.

$$

ANZ533-280900-
Chesapeake Bay from North Beach to Drum Point-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 10 to 15 kt...diminishing to 5 kt after
midnight. Waves 1 to 2 ft...subsiding to flat late.
.SUN...SE winds 10 to 15 kt. Waves flat...building to 2 ft in the
afternoon.
.SUN NIGHT...S winds 20 to 25 kt. Waves 3 ft. Patchy fog. Vsby 1 to
3 NM.
.MON...SW winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft. Rain
likely. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE...W winds 25 to 30 kt. Waves 4 ft.
.TUE NIGHT...W winds 20 to 25 kt. Gusts up to 30 kt in the evening.
Waves 4 ft...subsiding to 2 ft after midnight.
.WED...W winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...W winds 10 to 15 kt...becoming NW. Waves 1 to 2 ft.

$$

ANZ541-280900-
Choptank River to Cambridge MD and the Little Choptank River-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt. Waves 1 ft or less.
.SUN...SE winds 5 to 10 kt. Waves 1 ft or less.
.SUN NIGHT...S winds 20 to 25 kt. Waves 2 to 3 ft. Patchy fog. Vsby
1 to 3 NM.
.MON...SW winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft. Rain
likely. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE...W winds 25 to 30 kt. Waves 4 ft.
.TUE NIGHT...W winds 20 to 25 kt. Gusts up to 30 kt in the evening.
Waves 2 to 3 ft.
.WED...W winds 10 to 15 kt. Waves 1 to 2 ft.
.THU...W winds 10 to 15 kt...becoming NW after midnight. Waves 1 to
2 ft.

$$

ANZ542-280900-
Patuxent River to Broomes Island MD-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 5 to 10 kt until early morning... becoming
light. Waves 1 ft or less.
.SUN...S winds 5 to 10 kt. Waves 1 ft.
.SUN NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft. A
chance of rain.
.MON NIGHT...W winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft.
.TUE...W winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft.
.TUE NIGHT...W winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft.
.WED...W winds 5 to 10 kt. Waves 1 ft.
.THU...W winds 5 to 10 kt. Waves 1 ft.

$$

ANZ534-280900-
Chesapeake Bay from Drum Point to Smith Point-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 10 to 15 kt...diminishing to 5 kt after
midnight. Waves 1 to 2 ft.
.SUN...E winds around 5 kt...becoming S in the afternoon. Waves 1 ft
or less.
.SUN NIGHT...S winds 15 to 20 kt. Gusts up to 25 kt. Waves 3 ft.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 20 to 25 kt. Gusts up to 25 kt... increasing to
35 kt in the afternoon. Waves 4 ft. A chance of rain. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 5 ft.
.TUE...W winds 20 to 25 kt with gusts to 35 kt. Waves 4 ft.
.TUE NIGHT...W winds 20 to 25 kt. Waves 3 ft.
.WED...W winds 10 to 15 kt. Waves 2 ft.
.THU...W winds 10 to 15 kt...becoming NW 15 to 20 kt after midnight.
Waves 2 to 3 ft.

$$

ANZ543-280900-
Tangier Sound and the inland waters surrounding Bloodsworth Island-
658 PM EST Sat Dec 27 2025

.TONIGHT...NE winds 10 to 15 kt...diminishing to 5 kt after
midnight. Waves 1 ft or less.
.SUN...E winds around 5 kt...becoming S in the afternoon. Waves 1 ft
or less.
.SUN NIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft.
Patchy fog. Vsby 1 to 3 NM.
.MON...SW winds 20 to 25 kt with gusts to 30 kt. Waves 3 ft. A
chance of rain. Patchy fog.
.MON NIGHT...W winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft.
.TUE...W winds 20 to 25 kt with gusts to 35 kt. Waves 3 ft.
.TUE NIGHT...W winds 20 to 25 kt. Waves 2 ft.
.WED...W winds 10 to 15 kt. Waves 1 ft.
.THU...W winds 10 to 15 kt...becoming NW 15 to 20 kt after midnight.
Waves 1 to 2 ft.

$$



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