786
FZUS51 KLWX 210857
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
457 AM EDT MON SEP 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.
ANZ500-212300-
457 AM EDT MON SEP 21 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A STRONG AREA OF HIGH PRESSURE WILL BUILD TO OUR NORTH TODAY AND
REMAIN IN PLACE THROUGH MUCH OF THE WEEK, LEADING TO A PROLONGED
PERIOD OF ONSHORE FLOW. SEVERAL WAVES OF LOW PRESSURE MAY TRACK
ALONG THE STALLED FRONT TO OUR SOUTH DURING THIS TIME. SMALL CRAFT
ADVISORIES WILL LIKELY BE NEEDED FOR MUCH OF THE WEDNESDAY THROUGH
FRIDAY TIME PERIOD, AND A FEW LOW-END GALE GUSTS CAN'T BE RULED OUT
WEDNESDAY THROUGH FRIDAY.
ANZ535-212300-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
457 AM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TODAY
NE WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS WITH A CHANCE OF
TSTMS.
TUE...NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 1 FT. SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT...NE WINDS 10 TO 15 KT. GUSTS UP TO 30 KT
DIMINISHING
TO 20 KT AFTER MIDNIGHT. WAVES 1 FT. SHOWERS.
WED
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
THU
N WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-212300-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
457 AM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 10 KT. WAVES 1 FT.
TODAY
NE WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE...NE WINDS 10 KT
INCREASING TO 15 TO 20 KT IN THE AFTERNOON.
GUSTS UP TO 25 KT. WAVES 1 TO 2 FT. SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SHOWERS WITH A CHANCE OF TSTMS.
WED
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU
N WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
FRI
N WINDS 15 TO 20 KT. WAVES 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-212300-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
457 AM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 10 KT. WAVES 1 FT. ISOLATED
SHOWERS.
TODAY
NE WINDS 5 TO 10 KT. WAVES 2 FT.
TONIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS AND TSTMS.
TUE...NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
INCREASING TO
20 TO 25 KT WITH GUSTS TO 30 KT IN THE AFTERNOON. WAVES 3 FT.
SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 5 FT.
SHOWERS WITH A CHANCE OF TSTMS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 5 FT. SHOWERS
LIKELY.
WED NIGHT
NE WINDS 25 TO 30 KT. WAVES 5 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
FRI
N WINDS 20 TO 25 KT. WAVES 4 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-212300-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
457 AM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 10 KT. WAVES 1 FT.
TODAY
NE WINDS 10 TO 15 KT. WAVES 1 FT.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
THU
NE WINDS 15 TO 20 KT. WAVES 2 FT.
FRI
N WINDS 20 TO 25 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
ANZ531-212300-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TODAY
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. SHOWERS LIKELY.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS LIKELY.
WED
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT.
FRI
N WINDS 20 TO 25 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
ANZ538-212300-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
457 AM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 10 KT. WAVES 1 FT.
TODAY
NE WINDS 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SHOWERS.
WED
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
THU
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI
N WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
ANZ539-212300-
CHESTER RIVER TO QUEENSTOWN MD-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TODAY
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
A CHANCE OF SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT. SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO 3 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT.
THU
NE WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
FRI
N WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
ANZ532-212300-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TODAY
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
TONIGHT
NE WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
SHOWERS LIKELY.
WED
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
THU
NE WINDS 20 TO 25 KT. WAVES 4 FT.
FRI
N WINDS 25 TO 30 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
ANZ540-212300-
EASTERN BAY-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT. ISOLATED SHOWERS.
TODAY
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT.
THU
NE WINDS 20 TO 25 KT. WAVES 2 FT.
FRI
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
ANZ533-212300-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT. ISOLATED SHOWERS.
TODAY
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TONIGHT
E WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS LIKELY.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 25 TO 30 KT. WAVES 4 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
WED
NE WINDS 25 TO 30 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 25 TO 30 KT. WAVES 5 FT.
THU
NE WINDS 25 TO 30 KT. WAVES 4 FT.
FRI
N WINDS 25 TO 30 KT. WAVES 5 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-212300-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT. ISOLATED SHOWERS.
TODAY
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TONIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 TO 3 FT.
SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT.
FRI
N WINDS 25 TO 30 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-212300-
PATUXENT RIVER TO BROOMES ISLAND MD-
457 AM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 10 KT. WAVES 1 FT. ISOLATED
SHOWERS.
TODAY
NE WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
TUE...NE WINDS 15 TO 20 KT. GUSTS UP TO 20 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 1 FT. SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT.
SHOWERS WITH A CHANCE OF TSTMS.
WED
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT. SHOWERS
LIKELY.
WED NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
THU
NE WINDS 15 TO 20 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
N WINDS 15 TO 20 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-212300-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
N WINDS 10 KT. WAVES 1 FT. SCATTERED
SHOWERS.
TODAY...NE WINDS 10 TO 15 KT
BECOMING E LATE. GUSTS UP TO 20 KT.
WAVES 2 FT. A CHANCE OF SHOWERS.
TONIGHT
E WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 5 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
WED
NE WINDS 25 TO 30 KT. WAVES 5 FT. SHOWERS LIKELY.
WED NIGHT
NE WINDS 25 TO 30 KT. WAVES 5 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 25 TO 30 KT. WAVES 5 FT. A CHANCE OF SHOWERS.
FRI
N WINDS 25 TO 30 KT. WAVES 5 FT. A CHANCE OF SHOWERS THROUGH
THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-212300-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
457 AM EDT MON SEP 21 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL NOON EDT TODAY
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TUESDAY NIGHT...
REST OF THE OVERNIGHT
NW WINDS 10 KT. WAVES 1 FT. SCATTERED
SHOWERS.
TODAY
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
TONIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT. SHOWERS
LIKELY WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
WED
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. A
CHANCE OF SHOWERS.
WED NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. A
CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS IN THE
MORNING.
FRI
N WINDS 25 TO 30 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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