fzus51 klwx 211904
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coastal waters forecast
national weather service baltimore md/washington dc
304 pm edt tue apr 21 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.


anz531-220800-
chesapeake bay from pooles island to sandy point-
304 pm edt tue apr 21 2026

...small craft advisory in effect through wednesday morning...

.rest of this afternoon...s winds 10 kt. waves 1 ft. 
.tonight...s winds 15 to 20 kt. gusts up to 25 kt... increasing to
30 kt late. waves 2 ft. 
.wed...s winds 10 to 15 kt with gusts to 20 kt... becoming ne 5 kt
late. waves 1 to 2 ft. scattered showers.
.wed night...n winds around 5 kt. waves 1 ft or less. scattered
showers. 
.thu...nw winds 5 kt. waves flat. 
.thu night...nw winds around 5 kt. waves flat. 
.fri...e winds 5 to 10 kt. waves 1 ft or less. a chance of showers. 
.sat...e winds 10 to 15 kt. waves 1 to 2 ft. showers likely.  

$$

fzus51 klwx 211904
cwflwx
expires:202604220800;;759998

coastal waters forecast
national weather service baltimore md/washington dc
304 pm edt tue apr 21 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.


anz532-220800-
chesapeake bay from sandy point to north beach-
304 pm edt tue apr 21 2026

...small craft advisory in effect through wednesday morning...

.rest of this afternoon...se winds 15 kt. waves 2 ft. 
.tonight...s winds 15 to 20 kt. gusts up to 25 kt... increasing to
30 kt late. waves 2 to 3 ft. 
.wed...sw winds 10 to 15 kt with gusts to 25 kt... diminishing to
5 kt late. waves 3 ft...subsiding to 1 ft in the afternoon.
scattered showers. 
.wed night...nw winds 5 kt. waves less than 1 ft. scattered showers.
.thu...nw winds 5 kt. waves flat. 
.thu night...w winds 5 kt. waves flat. 
.fri...e winds 5 to 10 kt. waves 1 ft or less. a chance of showers. 
.sat...e winds 15 to 20 kt. waves 1 to 2 ft. a chance of showers in
the morning, then showers.  

$$

fzus51 klwx 211904
cwflwx
expires:202604220800;;760000

coastal waters forecast
national weather service baltimore md/washington dc
304 pm edt tue apr 21 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.


anz533-220800-
chesapeake bay from north beach to drum point-
304 pm edt tue apr 21 2026

...small craft advisory in effect through wednesday morning...

.rest of this afternoon...se winds 15 kt. waves 1 ft. 
.tonight...s winds 15 to 20 kt. gusts up to 25 kt... increasing to
30 kt late. waves 2 to 3 ft. 
.wed...sw winds 15 to 20 kt with gusts to 25 kt... becoming w 5 to
10 kt in the afternoon. waves 3 ft...subsiding to 1 ft in the
afternoon. scattered showers. 
.wed night...nw winds around 5 kt. waves 1 ft or less. 
.thu...nw winds 5 kt. waves less than 1 ft. 
.thu night...w winds around 5 kt. waves flat. 
.fri...e winds 5 to 10 kt. waves 1 ft or less. a chance of showers. 
.sat...e winds 15 to 20 kt. waves 1 to 2 ft. a chance of showers in
the morning, then showers.  

$$

fzus51 klwx 211904
cwflwx
expires:202604220800;;760003

coastal waters forecast
national weather service baltimore md/washington dc
304 pm edt tue apr 21 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.


anz534-220800-
chesapeake bay from drum point to smith point-
304 pm edt tue apr 21 2026

...small craft advisory in effect through wednesday morning...

.rest of this afternoon...se winds 15 kt. waves 1 ft. 
.tonight...s winds 20 to 25 kt with gusts to 30 kt. waves 3 ft. 
.wed...sw winds 20 to 25 kt with gusts to 30 kt... becoming w 5 to
10 kt in the afternoon. waves 2 to 3 ft. scattered showers. 
.wed night...w winds 5 kt. waves less than 1 ft. 
.thu...nw winds 5 kt. waves less than 1 ft. 
.thu night...sw winds 5 kt. waves less than 1 ft. 
.fri...e winds 10 to 15 kt. waves 1 ft. a chance of showers through
the night. 
.sat...e winds 15 to 20 kt. waves 2 to 3 ft. a chance of showers in
the morning. showers. 

$$

fzus51 klwx 211904
cwflwx
expires:202604220800;;759991

coastal waters forecast
national weather service baltimore md/washington dc
304 pm edt tue apr 21 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.


anz535-220800-
tidal potomac from key bridge to indian head-
304 pm edt tue apr 21 2026

...small craft advisory in effect through wednesday morning...

.rest of this afternoon...s winds 10 kt. waves 1 ft. 
.tonight...s winds 5 to 10 kt with gusts to 20 kt. waves 1 ft. 
.wed...sw winds 5 to 10 kt. gusts up to 20 kt early in the morning.
waves 1 ft. scattered showers. 
.wed night...nw winds around 5 kt. waves 1 ft. scattered showers. 
.thu...nw winds around 5 kt. waves 1 ft. 
.thu night...nw winds around 5 kt. waves 1 ft or less. 
.fri...e winds around 5 kt. waves 1 ft. a chance of showers. 
.sat...e winds 5 to 10 kt. waves 1 ft. a chance of showers in the
morning. showers. 

$$

fzus51 klwx 211904
cwflwx
expires:202604220800;;759992

coastal waters forecast
national weather service baltimore md/washington dc
304 pm edt tue apr 21 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.


anz536-220800-
tidal potomac from indian head to cobb island-
304 pm edt tue apr 21 2026

...small craft advisory in effect through wednesday morning...

.rest of this afternoon...s winds 10 kt. waves 1 ft. 
.tonight...s winds 10 to 15 kt with gusts to 25 kt. waves 1 ft. 
.wed...sw winds 10 to 15 kt...becoming w 5 to 10 kt late. gusts up
to 20 kt. waves 1 ft. numerous showers. 
.wed night...nw winds around 5 kt. waves 1 ft. 
.thu...nw winds around 5 kt. waves 1 ft. 
.thu night...w winds around 5 kt. waves 1 ft or less. 
.fri...e winds around 5 kt. waves 1 ft. a chance of showers. 
.sat...e winds 5 to 10 kt. waves 1 ft. a chance of showers in the
morning. showers. 

$$

fzus51 klwx 211904
cwflwx
expires:202604220800;;759993

coastal waters forecast
national weather service baltimore md/washington dc
304 pm edt tue apr 21 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.


anz537-220800-
tidal potomac from cobb island to smith point-
304 pm edt tue apr 21 2026

...small craft advisory in effect through wednesday morning...

.rest of this afternoon...se winds 15 kt. waves 1 ft. 
.tonight...s winds 15 to 20 kt with gusts to 25 kt. waves 2 ft. 
.wed...sw winds 15 to 20 kt with gusts to 25 kt... becoming w 5 to
10 kt in the afternoon. waves 1 to 2 ft. scattered showers. 
.wed night...w winds around 5 kt. waves 1 ft or less. 
.thu...nw winds 5 kt. waves flat. 
.thu night...sw winds around 5 kt. waves flat. 
.fri...e winds 5 to 10 kt. waves 1 ft or less. a chance of showers
through the night. 
.sat...e winds 10 to 15 kt. waves 1 to 2 ft...building to 3 ft after
midnight. a chance of showers in the morning. showers. 

$$