517
FZUS51 KLWX 162056
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
456 PM EDT WED SEP 16 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.
ANZ500-170800-
456 PM EDT WED SEP 16 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
CANADIAN HIGH PRESSURE WILL GRADUALLY PUSH TOWARD THE ATLANTIC COAST
THROUGH TONIGHT. A SLOW-MOVING COLD FRONT ACROSS THE GREAT LAKES
EVENTUALLY CROSSES THE WATERS BY FRIDAY MORNING. HIGH PRESSURE
BRIEFLY BUILDS OVER THE NORTHEASTERN U.S. ON SATURDAY BEFORE ANOTHER
FRONTAL SYSTEM LOOMS NEARBY TO FINISH THE WEEKEND. SMALL CRAFT
ADVISORIES MAY BE NEEDED AT TIMES ON THURSDAY DUE TO SOUTHERLY
CHANNELING EFFECTS, AND ON FRIDAY BEHIND THE COLD FRONT. WINDS MAY
AGAIN PROMPT SMALL CRAFT ADVISORIES DURING PORTIONS OF THE WEEKEND.
ANZ535-170800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
THU
S WINDS 5 KT. WAVES LESS THAN 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.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 5 TO 10 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ536-170800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
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.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 5 TO 10 KT
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ537-170800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
SE WINDS 10 KT. WAVES 1 FT.
TONIGHT
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. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SUN...S WINDS 5 TO 10 KT
BECOMING W AFTER MIDNIGHT. WAVES 1 FT. A
CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ530-170800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
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. A CHANCE OF SHOWERS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
N WINDS 10 TO 15 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE MORNING. SHOWERS LIKELY.
ANZ531-170800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF
SHOWERS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING N AFTER MIDNIGHT. WAVES 2 FT.
A CHANCE OF SHOWERS IN THE MORNING. SHOWERS LIKELY.
ANZ538-170800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
SE WINDS 10 KT. WAVES 1 FT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 10 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 FT. A
CHANCE OF SHOWERS IN THE MORNING. SHOWERS LIKELY.
ANZ539-170800-
CHESTER RIVER TO QUEENSTOWN MD-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT.
TONIGHT
S WINDS 5 TO 10 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. A CHANCE OF SHOWERS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING N 5 TO 10 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT. A CHANCE OF SHOWERS THROUGH THE DAY. SHOWERS LIKELY
THROUGH THE NIGHT.
ANZ532-170800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 2 FT.
TONIGHT
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
BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
FRI
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING N AFTER MIDNIGHT. WAVES 2 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ540-170800-
EASTERN BAY-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT.
TONIGHT
S WINDS 5 TO 10 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. A CHANCE OF SHOWERS.
FRI
N WINDS 10 TO 15 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ533-170800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 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
BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT.
FRI
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING NW AFTER MIDNIGHT. WAVES 2 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ541-170800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT.
TONIGHT
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
BECOMING SW 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 FT.
FRI
N WINDS 10 TO 15 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING E 5 KT IN THE AFTERNOON, THEN
BECOMING SE 10 TO 15 KT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH
THE NIGHT.
ANZ542-170800-
PATUXENT RIVER TO BROOMES ISLAND MD-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
SE WINDS 10 KT. WAVES 1 FT.
TONIGHT
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.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ534-170800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT.
TONIGHT
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
BECOMING SW AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 2 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE. WAVES 1 TO 2 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. WAVES 2 FT.
A CHANCE OF SHOWERS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE
NIGHT.
ANZ543-170800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
456 PM EDT WED SEP 16 2026
REST OF THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT.
TONIGHT
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 WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...E WINDS 10 TO 15 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. WAVES 1 TO
2 FT. SHOWERS LIKELY THROUGH THE NIGHT.
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