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(1/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 4:57 AM America/New_York.
Valid through 7/21/2026 7:00 PM America/New_York.
fzus51 klwx 210857
cwflwx
expires:202607212300;;339930
coastal waters forecast
national weather service baltimore md/washington dc
457 am edt tue jul 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.
anz531-212300-
chesapeake bay from pooles island to sandy point-
457 am edt tue jul 21 2026
...small craft advisory in effect through wednesday morning...
.rest of the overnight...se winds 15 kt with gusts to 20 kt. waves
2 ft. scattered showers and tstms.
.today...s winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
showers and numerous tstms.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 3 ft.
showers and numerous tstms.
.wed...sw winds 10 to 15 kt with gusts to 20 kt. waves 1 to 2 ft. a
chance of showers and tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. a chance of showers and tstms.
.thu...n winds 10 to 15 kt. waves 1 to 2 ft.
.thu night...ne winds 5 kt. waves less than 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft.
.sat...e winds 5 kt. waves less than 1 ft. a chance of showers
through the night.
winds and waves higher and visibilities lower in and near tstms.
$$
(2/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 4:57 AM America/New_York.
Valid through 7/21/2026 7:00 PM America/New_York.
fzus51 klwx 210857
cwflwx
expires:202607212300;;339933
coastal waters forecast
national weather service baltimore md/washington dc
457 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz532-212300-
chesapeake bay from sandy point to north beach-
457 am edt tue jul 21 2026
...small craft advisory in effect through wednesday morning...
.rest of the overnight...s winds 15 kt. waves 2 ft. scattered
showers and tstms.
.today...s winds 10 to 15 kt with gusts to 25 kt. waves 2 to 3 ft.
numerous showers and tstms.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 3 ft.
showers and numerous tstms.
.wed...sw winds 10 to 15 kt with gusts to 20 kt. waves 1 to 2 ft. a
chance of showers and tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. a chance of showers and tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft.
.sat...e winds 5 to 10 kt...becoming se after midnight. waves 1 ft.
a chance of showers through the night.
winds and waves higher and visibilities lower in and near tstms.
$$
(3/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 4:57 AM America/New_York.
Valid through 7/21/2026 7:00 PM America/New_York.
fzus51 klwx 210857
cwflwx
expires:202607212300;;339935
coastal waters forecast
national weather service baltimore md/washington dc
457 am edt tue jul 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.
anz533-212300-
chesapeake bay from north beach to drum point-
457 am edt tue jul 21 2026
...small craft advisory in effect through wednesday morning...
.rest of the overnight...s winds 10 kt. waves 2 ft. scattered
showers and tstms.
.today...s winds 15 to 20 kt with gusts to 25 kt. waves 2 to 3 ft.
numerous showers and tstms.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 3 ft.
showers and numerous tstms.
.wed...sw winds 15 to 20 kt with gusts to 25 kt... diminishing to
5 to 10 kt in the afternoon. waves 2 to 3 ft. showers likely with a
chance of tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. showers likely with a chance of tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft.
.sat...e winds 5 to 10 kt...becoming s after midnight. waves 1 ft.
winds and waves higher and visibilities lower in and near tstms.
$$
(4/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 4:57 AM America/New_York.
Valid through 7/21/2026 7:00 PM America/New_York.
fzus51 klwx 210857
cwflwx
expires:202607212300;;339938
coastal waters forecast
national weather service baltimore md/washington dc
457 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz534-212300-
chesapeake bay from drum point to smith point-
457 am edt tue jul 21 2026
...small craft advisory in effect through wednesday afternoon...
.rest of the overnight...s winds 10 kt. waves 2 ft. scattered
showers and tstms.
.today...s winds 15 to 20 kt with gusts to 25 kt. waves 2 to 3 ft.
numerous showers and tstms.
.tonight...sw winds 20 to 25 kt with gusts to 30 kt. waves 4 ft.
showers and numerous tstms.
.wed...sw winds 20 to 25 kt with gusts to 30 kt. waves 3 ft. showers
with a chance of tstms.
.wed night...w winds 10 kt...becoming n after midnight. gusts up to
20 kt. waves 2 to 3 ft. showers with a chance of tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 to 3 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft. a chance of showers after
midnight.
.sat...e winds 5 to 10 kt...becoming sw after midnight. waves 1 ft.
a chance of showers.
winds and waves higher and visibilities lower in and near tstms.
$$
(5/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 4:57 AM America/New_York.
Valid through 7/21/2026 7:00 PM America/New_York.
fzus51 klwx 210857
cwflwx
expires:202607212300;;339926
coastal waters forecast
national weather service baltimore md/washington dc
457 am edt tue jul 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.
anz535-212300-
tidal potomac from key bridge to indian head-
457 am edt tue jul 21 2026
...small craft advisory in effect from 2 pm edt this afternoon
through late tonight...
.rest of the overnight...s winds 5 kt. waves less than 1 ft.
scattered showers with isolated tstms.
.today...s winds 10 to 15 kt. gusts up to 20 kt... increasing to
25 kt late. waves 1 ft. numerous showers and tstms.
.tonight...sw winds 10 to 15 kt. gusts up to 25 kt until early
morning. waves 1 ft. numerous showers and tstms.
.wed...w winds 5 to 10 kt. waves 1 ft. showers likely with a chance
of tstms.
.wed night...nw winds 5 to 10 kt. waves 1 ft. a chance of showers
and tstms.
.thu...n winds 5 to 10 kt. waves 1 ft.
.thu night...ne winds around 5 kt. waves 1 ft or less.
.fri...e winds around 5 kt. waves 1 ft.
.sat...se winds around 5 kt. waves 1 ft.
winds and waves higher and visibilities lower in and near tstms.
$$
(6/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 4:57 AM America/New_York.
Valid through 7/21/2026 7:00 PM America/New_York.
fzus51 klwx 210857
cwflwx
expires:202607212300;;339927
coastal waters forecast
national weather service baltimore md/washington dc
457 am edt tue jul 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz536-212300-
tidal potomac from indian head to cobb island-
457 am edt tue jul 21 2026
...small craft advisory in effect from 2 pm edt this afternoon
through late tonight...
.rest of the overnight...s winds 10 kt. waves 1 ft. scattered
showers with isolated tstms.
.today...sw winds 10 to 15 kt with gusts to 20 kt. waves 1 ft.
numerous showers and tstms.
.tonight...sw winds 10 to 15 kt with gusts to 25 kt. waves 1 to
2 ft. showers and numerous tstms.
.wed...sw winds 10 to 15 kt with gusts to 20 kt. waves 1 ft. showers
with a chance of tstms.
.wed night...nw winds 5 to 10 kt. waves 1 ft. showers likely with a
chance of tstms.
.thu...n winds 5 to 10 kt. waves 1 ft.
.thu night...ne winds around 5 kt. waves 1 ft.
.fri...e winds around 5 kt. waves 1 ft.
.sat...se winds around 5 kt. waves 1 ft.
winds and waves higher and visibilities lower in and near tstms.
$$
(7/7)
Latest Coastal Waters Forecast by KLWX
Issued 7/21/2026 4:57 AM America/New_York.
Valid through 7/21/2026 7:00 PM America/New_York.
fzus51 klwx 210857
cwflwx
expires:202607212300;;339928
coastal waters forecast
national weather service baltimore md/washington dc
457 am edt tue jul 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.
anz537-212300-
tidal potomac from cobb island to smith point-
457 am edt tue jul 21 2026
...small craft advisory in effect through wednesday afternoon...
.rest of the overnight...s winds 10 kt. waves 1 ft. scattered
showers and tstms.
.today...sw winds 15 to 20 kt. gusts up to 25 kt. waves 2 ft.
numerous showers and tstms.
.tonight...sw winds 15 to 20 kt with gusts to 25 kt. waves 2 ft.
showers and numerous tstms.
.wed...sw winds 15 to 20 kt with gusts to 25 kt. waves 2 ft. showers
with a chance of tstms.
.wed night...nw winds 10 to 15 kt. gusts up to 20 kt. waves 1 to
2 ft. showers with a chance of tstms.
.thu...n winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
.thu night...ne winds 5 to 10 kt. waves 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft. a chance of showers after
midnight.
.sat...e winds 5 kt. waves less than 1 ft. a chance of showers
through the day.
winds and waves higher and visibilities lower in and near tstms.
$$
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