777
FZUS51 KLWX 152058
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
457 PM EDT TUE SEP 15 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.
ANZ500-160800-
457 PM EDT TUE SEP 15 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
CANADIAN HIGH PRESSURE WILL REMAIN OVER THE NORTHEASTERN U.S.
THROUGH THE MIDDLE OF THE WEEK. ANOTHER COLD FRONT IS EXPECTED TO
NEAR THE REGION BY FRIDAY MORNING BEFORE HIGH PRESSURE BUILDS IN
FROM THE NORTHWEST INTO THE WEEKEND. SMALL CRAFT ADVISORIES MAY BE
NEEDED AT TIMES ON THURSDAY DUE TO SOUTHERLY CHANNELING EFFECTS.
ANZ535-160800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
WED
S WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
THU
S WINDS AROUND 5 KT. WAVES 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
ANZ536-160800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
WED
S WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
ANZ537-160800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SE WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING NE. WAVES 1 TO 2 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
ANZ530-160800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 FT.
ANZ531-160800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES FLAT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
THU NIGHT...S WINDS 10 TO 15 KT
BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT.
FRI...N WINDS 10 TO 15 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 TO
2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
ANZ538-160800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SE WINDS 5 KT. WAVES FLAT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
ANZ539-160800-
CHESTER RIVER TO QUEENSTOWN MD-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
LIGHT WINDS. WAVES FLAT.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ532-160800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES FLAT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
THU
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
THU NIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT.
FRI...NW WINDS 10 TO 15 KT
BECOMING NE. WAVES 1 TO 2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
ANZ540-160800-
EASTERN BAY-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SW WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
FRI...N WINDS 5 TO 10 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ533-160800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES FLAT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
THU NIGHT
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI...NW WINDS 10 TO 15 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 TO
2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
ANZ541-160800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 10 TO 15 KT. WAVES 1 FT.
THU NIGHT
S WINDS 10 TO 15 KT. WAVES 1 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING NE. WAVES 1 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
ANZ542-160800-
PATUXENT RIVER TO BROOMES ISLAND MD-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING NE. WAVES 1 FT.
SAT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ534-160800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SE WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
THU NIGHT
S WINDS 10 TO 15 KT. WAVES 2 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING NE 10 TO 15 KT. WAVES 1 TO
2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
ANZ543-160800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
457 PM EDT TUE SEP 15 2026
REST OF THIS AFTERNOON
SE WINDS 5 KT. WAVES FLAT.
TONIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
S WINDS 10 TO 15 KT. WAVES 1 FT.
FRI...NW WINDS 5 TO 10 KT
BECOMING NE. WAVES 1 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
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