344
FZUS51 KLWX 202056
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
456 PM EDT TUE OCT 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-
456 PM EDT TUE OCT 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE REMAINS POSITIONED NORTH OF THE AREA THROUGH THE
MIDDLE OF THE WEEK AS LOW PRESSURE MEANDERS OFF THE MID-ATLANTIC
COAST. THE LOW WILL LIKELY DEPART BY THE END OF THE WEEK AS HIGH
PRESSURE BUILDS OVERHEAD. ADDITIONAL SMALL CRAFT ADVISORIES WILL
LIKELY BE NEEDED AT TIMES THROUGH THE END OF THE WEEK.
ANZ535-210800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
456 PM EDT TUE OCT 20 2026
REST OF THIS AFTERNOON
N WINDS 10 KT. WAVES 1 FT.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WED
N WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ536-210800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
456 PM EDT TUE OCT 20 2026
REST OF THIS AFTERNOON
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
N WINDS 10 TO 15 KT. WAVES 1 FT.
FRI...N WINDS 10 TO 15 KT
BECOMING NE AROUND 5 KT. WAVES 1 FT.
SAT
NE WINDS AROUND 5 KT. WAVES 1 FT.
ANZ537-210800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
3 FT.
TONIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
FRI...N WINDS 15 TO 20 KT
BECOMING NE 5 TO 10 KT. WAVES 2 TO
3 FT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
ANZ530-210800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
N WINDS 15 TO 20 KT. WAVES 1 FT.
FRI...N WINDS 10 TO 15 KT
BECOMING NE 5 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ531-210800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
WED NIGHT
N WINDS 10 TO 15 KT. WAVES 2 FT.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
FRI...N WINDS 15 TO 20 KT
BECOMING NE 5 TO 10 KT. WAVES 2 TO
3 FT...SUBSIDING TO 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ538-210800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 10 KT. WAVES 1 FT.
TONIGHT
N WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ539-210800-
CHESTER RIVER TO QUEENSTOWN MD-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED
N WINDS 10 TO 15 KT. GUSTS UP TO 25 KT UNTIL LATE AFTERNOON.
WAVES 1 TO 2 FT.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 10 KT. WAVES 2 FT.
THU NIGHT
N WINDS 15 TO 20 KT. WAVES 2 FT.
FRI...N WINDS 10 TO 15 KT
BECOMING NE 5 KT. WAVES 1 TO 2 FT.
SAT
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ532-210800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
3 FT.
TONIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
THU
N WINDS 10 TO 15 KT. WAVES 2 FT.
THU NIGHT
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
FRI...N WINDS 15 TO 20 KT
BECOMING NE 5 TO 10 KT. WAVES 2 TO
3 FT...SUBSIDING TO 1 FT AFTER MIDNIGHT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ540-210800-
EASTERN BAY-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU
N WINDS 10 TO 15 KT. WAVES 1 FT.
THU NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
FRI...N WINDS 15 TO 20 KT
BECOMING NE 5 TO 10 KT. WAVES 1 TO
2 FT.
SAT
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ533-210800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT.
TONIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
WED
N WINDS 20 TO 25 KT. WAVES 3 FT.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
N WINDS 20 TO 25 KT. WAVES 3 FT.
FRI...N WINDS 15 TO 20 KT...BECOMING NE 5 TO 10 KT. WAVES 3 FT
SUBSIDING TO 2 FT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
ANZ541-210800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TONIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
WED
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
N WINDS 20 TO 25 KT. WAVES 2 TO 3 FT.
FRI...N WINDS 15 TO 20 KT
BECOMING NE 5 TO 10 KT. WAVES 1 TO
2 FT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ542-210800-
PATUXENT RIVER TO BROOMES ISLAND MD-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TONIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
WED
N WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
WED NIGHT
N WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI...NE WINDS 10 TO 15 KT
DIMINISHING TO AROUND 5 KT AFTER
MIDNIGHT. WAVES 1 FT.
SAT
NE WINDS AROUND 5 KT. WAVES 1 FT.
ANZ534-210800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
4 FT.
TONIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
WED
N WINDS 20 TO 25 KT. WAVES 3 FT.
WED NIGHT
N WINDS 15 TO 20 KT. WAVES 3 FT.
THU
N WINDS 15 TO 20 KT. WAVES 3 FT.
THU NIGHT...N WINDS 10 TO 15 KT
INCREASING TO 20 TO 25 KT AFTER
MIDNIGHT. WAVES 3 FT.
FRI...NE WINDS 15 TO 20 KT
DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. WAVES 3 FT...SUBSIDING TO 2 FT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
ANZ543-210800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
456 PM EDT TUE OCT 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY AFTERNOON
REST OF THIS AFTERNOON
N WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TONIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO 3 FT.
WED
N WINDS 15 TO 20 KT. GUSTS UP TO 30 KT IN THE MORNING. WAVES
2 FT.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU
N WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
FRI...NE WINDS 15 TO 20 KT
DIMINISHING TO 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
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