(1/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 12:40 PM America/New_York.
Valid through 4/22/2026 4:00 AM America/New_York.
fzus51 klwx 211640
cwflwx
expires:202604220800;;751833
coastal waters forecast
national weather service baltimore md/washington dc
1240 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-
1240 pm edt tue apr 21 2026
...small craft advisory in effect from 6 pm edt this evening through
wednesday morning...
.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. a chance of showers in
the morning, then showers likely.
$$
(2/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 12:40 PM America/New_York.
Valid through 4/22/2026 4:00 AM America/New_York.
fzus51 klwx 211640
cwflwx
expires:202604220800;;751836
coastal waters forecast
national weather service baltimore md/washington dc
1240 pm edt tue apr 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz532-220800-
chesapeake bay from sandy point to north beach-
1240 pm edt tue apr 21 2026
...small craft advisory in effect from 6 pm edt this evening through
wednesday morning...
.this afternoon...se winds 10 to 15 kt. waves 1 to 2 ft.
.tonight...s winds 15 to 20 kt. gusts up to 25 kt... increasing to
30 kt late. waves 2 to 3 ft.
.wed...sw winds 10 to 15 kt with gusts to 25 kt... diminishing to
5 kt late. waves 3 ft...subsiding to 1 ft in the afternoon.
scattered showers.
.wed night...nw winds 5 kt. waves less than 1 ft. scattered showers.
.thu...nw winds 5 kt. waves flat.
.thu night...w winds 5 kt. waves flat.
.fri...e winds 5 to 10 kt. waves 1 ft or less. a chance of showers.
.sat...e winds 10 to 15 kt...becoming ne 15 to 20 kt after midnight.
waves 1 to 2 ft. a chance of showers in the morning, then showers
likely.
$$
(3/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 12:40 PM America/New_York.
Valid through 4/22/2026 4:00 AM America/New_York.
fzus51 klwx 211640
cwflwx
expires:202604220800;;751838
coastal waters forecast
national weather service baltimore md/washington dc
1240 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-
1240 pm edt tue apr 21 2026
...small craft advisory in effect from 6 pm edt this evening through
wednesday morning...
.this afternoon...se winds 10 to 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 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.
$$
(4/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 12:40 PM America/New_York.
Valid through 4/22/2026 4:00 AM America/New_York.
fzus51 klwx 211640
cwflwx
expires:202604220800;;751841
coastal waters forecast
national weather service baltimore md/washington dc
1240 pm edt tue apr 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz534-220800-
chesapeake bay from drum point to smith point-
1240 pm edt tue apr 21 2026
...small craft advisory in effect from 6 pm edt this evening through
wednesday morning...
.this afternoon...se winds 10 to 15 kt. waves 1 ft.
.tonight...s winds 20 to 25 kt with gusts to 30 kt. waves 3 ft.
.wed...sw winds 20 to 25 kt with gusts to 30 kt... becoming w 5 to
10 kt in the afternoon. waves 2 to 3 ft. scattered showers.
.wed night...w winds 5 kt. waves less than 1 ft.
.thu...nw winds 5 kt. waves less than 1 ft.
.thu night...sw winds 5 kt. waves less than 1 ft.
.fri...e winds 5 to 10 kt. waves 1 ft. a chance of showers through
the night.
.sat...e winds 10 to 15 kt...becoming ne 15 to 20 kt after midnight.
waves 2 to 3 ft. a chance of showers in the afternoon. showers
likely through the night.
$$
(5/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 12:40 PM America/New_York.
Valid through 4/22/2026 4:00 AM America/New_York.
fzus51 klwx 211640
cwflwx
expires:202604220800;;751829
coastal waters forecast
national weather service baltimore md/washington dc
1240 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-
1240 pm edt tue apr 21 2026
...small craft advisory in effect from 6 pm edt this evening through
wednesday morning...
.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 likely.
$$
(6/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 12:40 PM America/New_York.
Valid through 4/22/2026 4:00 AM America/New_York.
fzus51 klwx 211640
cwflwx
expires:202604220800;;751830
coastal waters forecast
national weather service baltimore md/washington dc
1240 pm edt tue apr 21 2026
tidal potomac river and maryland portion of chesapeake bay.
forecasts of wave heights do not include effects of wind direction
relative to tidal currents. expect higher waves when winds are
blowing against the tidal flow. waves flat where waters are iced over.
anz536-220800-
tidal potomac from indian head to cobb island-
1240 pm edt tue apr 21 2026
...small craft advisory in effect from 6 pm edt this evening through
wednesday morning...
.this afternoon...s winds 10 kt. waves 1 ft.
.tonight...s winds 10 to 15 kt with gusts to 25 kt. waves 1 ft.
.wed...sw winds 10 to 15 kt...becoming w 5 to 10 kt late. gusts up
to 20 kt. waves 1 ft. numerous showers.
.wed night...nw winds around 5 kt. waves 1 ft.
.thu...nw winds around 5 kt. waves 1 ft.
.thu night...w winds around 5 kt. waves 1 ft or less.
.fri...e winds around 5 kt. waves 1 ft. a chance of showers.
.sat...e winds 5 to 10 kt. waves 1 ft. a chance of showers in the
morning. showers likely.
$$
(7/7)
Latest Coastal Waters Forecast by KLWX
Issued 4/21/2026 12:40 PM America/New_York.
Valid through 4/22/2026 4:00 AM America/New_York.
fzus51 klwx 211640
cwflwx
expires:202604220800;;751831
coastal waters forecast
national weather service baltimore md/washington dc
1240 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-
1240 pm edt tue apr 21 2026
...small craft advisory in effect from 6 pm edt this evening through
wednesday morning...
.this afternoon...e winds 5 kt...becoming se 15 kt late. 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...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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