001
FZUS51 KLWX 211618
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1218 PM 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.
ANZ500-220800-
1218 PM EDT MON SEP 21 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A STRONG AREA OF HIGH PRESSURE WILL REMAIN IN PLACE TO OUR NORTH
THROUGH MUCH OF THE WEEK LEADING TO A PROLONGED PERIOD OF ONSHORE
FLOW. SEVERAL WAVES OF LOW PRESSURE MAY TRACK ALONG A 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.
ANZ535-220800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
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 25 KT
INCREASING TO
30 KT LATE. 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.
ANZ536-220800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 FT. ISOLATED SHOWERS.
TONIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS 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.
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.
ANZ537-220800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 TO 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 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.
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.
ANZ530-220800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS.
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.
ANZ531-220800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 15 KT. WAVES 1 TO 2 FT. SCATTERED
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.
ANZ538-220800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 FT. NUMEROUS 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.
ANZ539-220800-
CHESTER RIVER TO QUEENSTOWN MD-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 FT. SCATTERED 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.
ANZ532-220800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 15 KT. WAVES 1 TO 2 FT. NUMEROUS SHOWERS.
TONIGHT
NE WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS.
TUE...NE WINDS 20 TO 25 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT LATE. 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.
ANZ540-220800-
EASTERN BAY-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS.
TUE...NE WINDS 15 TO 20 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT LATE. 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 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.
ANZ533-220800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 TO 15 KT. WAVES 2 FT. SCATTERED
SHOWERS.
TONIGHT
E WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS LIKELY.
TUE...NE WINDS 20 TO 25 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 3 FT. SHOWERS.
TUE NIGHT
NE WINDS 25 TO 30 KT. WAVES 4 FT. SHOWERS LIKELY.
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.
ANZ541-220800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 TO 15 KT. WAVES 1 FT. SCATTERED
SHOWERS.
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. GUSTS UP TO 25 KT
INCREASING TO
30 KT LATE. WAVES 2 TO 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 25 TO 30 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
ANZ542-220800-
PATUXENT RIVER TO BROOMES ISLAND MD-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE
WEDNESDAY NIGHT...
THIS AFTERNOON
NE WINDS 10 KT. WAVES 1 FT. ISOLATED SHOWERS.
TONIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. 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.
ANZ534-220800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY
AFTERNOON...
THIS AFTERNOON
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
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.
ANZ543-220800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
1218 PM EDT MON SEP 21 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH
LATE TUESDAY NIGHT...
...GALE WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY
AFTERNOON...
THIS AFTERNOON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
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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