(1/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 9:43 AM America/New_York.
Valid through 4/21/2026 4:00 PM America/New_York.
fzus51 klwx 211343
cwflwx
expires:202604212000;;746388
coastal waters forecast
national weather service baltimore md/washington dc
943 am 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.
anz531-212000-
chesapeake bay from pooles island to sandy point-
943 am edt tue apr 21 2026
.rest of today...se winds 5 to 10 kt. waves 1 ft.
.tonight...s winds 10 to 15 kt with gusts to 20 kt. waves 2 ft.
.wed...sw winds 10 to 15 kt...diminishing to 5 kt in the afternoon.
waves 1 to 2 ft. showers likely.
.wed night...nw winds around 5 kt. waves 1 ft or less.
.thu...nw winds 5 kt. waves flat.
.thu night...se 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. a chance of showers in
the morning, then showers likely.
$$
(2/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 9:43 AM America/New_York.
Valid through 4/21/2026 4:00 PM America/New_York.
fzus51 klwx 211343
cwflwx
expires:202604212000;;746391
coastal waters forecast
national weather service baltimore md/washington dc
943 am edt tue apr 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz532-212000-
chesapeake bay from sandy point to north beach-
943 am edt tue apr 21 2026
...small craft advisory in effect from 8 pm edt this evening through
wednesday morning...
.rest of today...se winds 5 to 10 kt...increasing to 15 kt late.
waves 1 ft.
.tonight...s winds 15 to 20 kt. waves 2 to 3 ft.
.wed...sw winds 10 to 15 kt with gusts to 20 kt... becoming w 5 kt
late. waves 3 ft...subsiding to 1 ft in the afternoon. showers
likely.
.wed night...nw winds around 5 kt. waves 1 ft or less.
.thu...nw winds 5 kt. waves flat.
.thu night...w winds 5 kt. waves flat.
.fri...e winds 5 to 10 kt. waves 1 ft or less. a chance of showers.
.sat...e winds 10 to 15 kt...becoming ne 15 to 20 kt after midnight.
waves 1 to 2 ft. a chance of showers in the morning, then showers
likely.
$$
(3/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 9:43 AM America/New_York.
Valid through 4/21/2026 4:00 PM America/New_York.
fzus51 klwx 211343
cwflwx
expires:202604212000;;746393
coastal waters forecast
national weather service baltimore md/washington dc
943 am 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.
anz533-212000-
chesapeake bay from north beach to drum point-
943 am edt tue apr 21 2026
...small craft advisory in effect from 8 pm edt this evening through
wednesday morning...
.rest of today...e winds 5 kt...becoming se 10 to 15 kt this
afternoon. waves 1 ft.
.tonight...s winds 15 to 20 kt. waves 2 to 3 ft.
.wed...sw winds 15 to 20 kt...becoming w 5 to 10 kt in the
afternoon. waves 3 ft...subsiding to 1 ft in the afternoon. showers
likely.
.wed night...nw winds around 5 kt. waves 1 ft or less.
.thu...nw winds around 5 kt. waves 1 ft.
.thu night...sw winds around 5 kt. waves flat.
.fri...ne winds 5 kt...becoming se. waves 1 ft or less. a chance of
showers through the night.
.sat...e winds 10 to 15 kt...becoming ne 15 to 20 kt after midnight.
waves 1 to 2 ft. a chance of showers in the morning, then showers
likely.
$$
(4/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 9:43 AM America/New_York.
Valid through 4/21/2026 4:00 PM America/New_York.
fzus51 klwx 211343
cwflwx
expires:202604212000;;746396
coastal waters forecast
national weather service baltimore md/washington dc
943 am edt tue apr 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz534-212000-
chesapeake bay from drum point to smith point-
943 am edt tue apr 21 2026
...small craft advisory in effect from 8 pm edt this evening through
wednesday morning...
.rest of today...ne winds 5 kt...becoming se 10 to 15 kt this
afternoon. waves 1 ft.
.tonight...s winds 15 to 20 kt. gusts up to 25 kt. waves 3 ft.
.wed...sw winds 15 to 20 kt with gusts to 25 kt... becoming w 5 to
10 kt in the afternoon. waves 2 to 3 ft. showers likely.
.wed night...nw winds 5 kt. waves less than 1 ft.
.thu...nw winds 5 kt. waves less than 1 ft.
.thu night...s winds around 5 kt. waves 1 ft or less.
.fri...e winds 5 to 10 kt. waves 1 ft. a chance of showers through
the night.
.sat...e winds 10 to 15 kt...becoming ne 15 to 20 kt after midnight.
waves 2 to 3 ft. a chance of showers in the afternoon. showers
likely through the night.
$$
(5/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 9:43 AM America/New_York.
Valid through 4/21/2026 4:00 PM America/New_York.
fzus51 klwx 211343
cwflwx
expires:202604212000;;746384
coastal waters forecast
national weather service baltimore md/washington dc
943 am 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.
anz535-212000-
tidal potomac from key bridge to indian head-
943 am edt tue apr 21 2026
.rest of today...sw winds 5 to 10 kt. waves 1 ft.
.tonight...s winds 5 to 10 kt. waves 1 ft.
.wed...sw winds 5 to 10 kt. waves 1 ft. showers likely.
.wed night...nw winds around 5 kt. waves 1 ft.
.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 through
the night.
.sat...e winds 5 to 10 kt. waves 1 ft. a chance of showers in the
morning. showers likely.
$$
(6/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 9:43 AM America/New_York.
Valid through 4/21/2026 4:00 PM America/New_York.
fzus51 klwx 211343
cwflwx
expires:202604212000;;746385
coastal waters forecast
national weather service baltimore md/washington dc
943 am edt tue apr 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz536-212000-
tidal potomac from indian head to cobb island-
943 am edt tue apr 21 2026
.rest of today...sw winds 5 kt...becoming s late. waves 1 ft.
.tonight...s winds 10 to 15 kt. waves 1 ft.
.wed...sw winds 10 to 15 kt...becoming w 5 kt late. waves 1 ft.
showers likely.
.wed night...w winds around 5 kt. waves 1 ft.
.thu...nw winds around 5 kt. waves 1 ft.
.thu night...s winds around 5 kt. waves 1 ft or less.
.fri...e winds around 5 kt. waves 1 ft. a chance of showers through
the night.
.sat...e winds 5 to 10 kt. waves 1 ft. a chance of showers in the
morning. showers likely.
$$
(7/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 9:43 AM America/New_York.
Valid through 4/21/2026 4:00 PM America/New_York.
fzus51 klwx 211343
cwflwx
expires:202604212000;;746386
coastal waters forecast
national weather service baltimore md/washington dc
943 am 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.
anz537-212000-
tidal potomac from cobb island to smith point-
943 am edt tue apr 21 2026
...small craft advisory in effect from 8 pm edt this evening through
wednesday morning...
.rest of today...ne winds 5 kt...becoming se 15 kt late. waves 1 ft.
.tonight...s winds 10 to 15 kt...becoming 15 kt late. gusts up to
20 kt. waves 2 ft.
.wed...sw winds 10 to 15 kt with gusts to 20 kt... becoming w 5 to
10 kt in the afternoon. waves 1 to 2 ft. showers likely.
.wed night...nw winds around 5 kt. waves 1 ft or less.
.thu...nw winds 5 kt. waves flat.
.thu night...s winds around 5 kt. waves flat.
.fri...ne winds around 5 kt...becoming se. waves 1 ft or less. a
chance of showers through the night.
.sat...e winds 10 to 15 kt...becoming ne after midnight. waves 1 to
2 ft...building to 3 ft after midnight. a chance of showers in the
afternoon. showers likely through the night.
$$
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