690
FZUS51 KLWX 201827
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
226 PM EDT MON APR 20 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.
ANZ500-210800-
226 PM EDT MON APR 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BUILD IN THROUGH TUESDAY. A COLD FRONT LOOKS TO
DROP IN FROM THE NORTH WEDNESDAY, THEN CROSS THE MID-ATLANTIC BY
THURSDAY. SMALL CRAFT ADVISORIES MAY BE NEEDED LATE TUESDAY INTO
WEDNESDAY IN SOUTH TO SOUTHWEST FLOW.
ANZ535-210800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 15 KT WITH GUSTS TO 30 KT. WAVES 1 FT.
SCATTERED SPRINKLES.
TONIGHT...NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING N
5 KT AFTER MIDNIGHT. WAVES 1 FT.
TUE
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NE 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.
ANZ536-210800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT. SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING TO
5 KT LATE. WAVES 1 FT.
TUE...NE WINDS AROUND 5 KT
BECOMING S LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
LIKELY.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
NE WINDS AROUND 5 KT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ537-210800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT. SCATTERED SPRINKLES.
TONIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 2 TO 3 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
WED NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
THU...N WINDS 5 TO 10 KT
BECOMING SE. WAVES 1 FT OR LESS.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ530-210800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NE
5 TO 10 KT LATE. WAVES 1 FT.
TUE...N WINDS 5 KT
BECOMING S LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ531-210800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT LATE. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
THU
NW WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ538-210800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SPRINKLES.
TONIGHT...NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING N
5 KT AFTER MIDNIGHT. WAVES 1 FT.
TUE...E WINDS 5 KT
BECOMING SE LATE. WAVES 1 FT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES FLAT.
THU
N WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
ANZ539-210800-
CHESTER RIVER TO QUEENSTOWN MD-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT. SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT LATE. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES 1 FT
OR LESS.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
W WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS THROUGH THE
NIGHT.
ANZ532-210800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT. SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT.
WED
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
THU
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ540-210800-
EASTERN BAY-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON
NW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT. SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT LATE. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES 1 FT
OR LESS.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
W WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ533-210800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE LATE. GUSTS UP TO
20 KT. WAVES 2 TO 3 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT.
THU...N WINDS 5 TO 10 KT
BECOMING SE. WAVES 1 FT OR LESS.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ541-210800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT LATE. GUSTS
UP TO 20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SW IN THE AFTERNOON. WAVES
1 FT OR LESS.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ542-210800-
PATUXENT RIVER TO BROOMES ISLAND MD-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 PM EDT THIS EVENING
THIS AFTERNOON...NW WINDS 25 KT
DIMINISHING TO 15 KT LATE. WAVES
1 FT. SCATTERED SPRINKLES.
TONIGHT...N WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT LATE. GUSTS
UP TO 20 KT. WAVES 1 FT.
TUE...NE WINDS 5 KT
BECOMING SE LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A CHANCE
OF SHOWERS.
WED NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
E WINDS AROUND 5 KT. WAVES 1 FT.
FRI
SE WINDS AROUND 5 KT. WAVES 1 FT.
ANZ534-210800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SCATTERED SPRINKLES.
TONIGHT
N WINDS 15 TO 20 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 2 TO 3 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE LATE. WAVES 1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. 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 2 TO 3 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ543-210800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
226 PM EDT MON APR 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
THIS AFTERNOON
NW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES
2 FT. SCATTERED SPRINKLES.
TONIGHT
N WINDS 15 TO 20 KT. GUSTS UP TO 25 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SW IN THE AFTERNOON. WAVES 1 FT
OR LESS.
TUE NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO
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. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU...NW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT OR LESS.
FRI
SE WINDS 5 TO 10 KT. WAVES 1 FT.
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