356
FZUS51 KLWX 182359
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
759 PM EDT MON MAY 18 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.
ANZ500-190800-
759 PM EDT MON MAY 18 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL CONTINUE TO STRENGTHEN OFFSHORE TODAY THROUGH
TUESDAY LEADING TO INCREASED SOUTH TO SOUTHWESTERLY FLOW. EXPECT
SMALL CRAFT ADVISORIES FOR CHANNELING THIS AFTERNOON AND AGAIN
TUESDAY AFTERNOON. WINDS WILL SUBSIDE DURING THE LATE EVENING AND
OVERNIGHT PERIODS. ADDITIONAL SMALL CRAFT ADVISORIES WILL BE NEEDED
WEDNESDAY INTO THURSDAY AS A COLD FRONT CROSSES THE WATERS. THE
FRONT WILL BRING SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS
WEDNESDAY AFTERNOON AND EVENING. SPECIAL MARINE WARNINGS MAY BE
NEEDED FOR STRONGER THUNDERSTORMS DURING THIS TIME.
ANZ535-190800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
759 PM EDT MON MAY 18 2026
TONIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
THU NIGHT
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-190800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
759 PM EDT MON MAY 18 2026
TONIGHT
S WINDS 10 KT. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
SW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-190800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TUE
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TUE NIGHT
S WINDS 10 TO 15 KT. WAVES 2 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS
LIKELY.
THU NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
FRI
E WINDS 10 TO 15 KT. WAVES 2 FT. SHOWERS LIKELY.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY .
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-190800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
759 PM EDT MON MAY 18 2026
TONIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS WITH A CHANCE OF
TSTMS.
WED NIGHT
N WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS.
THU...N WINDS 10 TO 15 KT
BECOMING NE AROUND 5 KT IN THE
AFTERNOON. WAVES 1 FT. A CHANCE OF SHOWERS.
THU NIGHT
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-190800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS WITH A CHANCE OF
TSTMS.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
THU NIGHT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-190800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUE NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS WITH A CHANCE OF
TSTMS.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
THU NIGHT
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-190800-
CHESTER RIVER TO QUEENSTOWN MD-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
WED NIGHT...NW WINDS 5 KT
BECOMING N 10 TO 15 KT AFTER MIDNIGHT.
WAVES 1 FT. SHOWERS.
THU
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. SHOWERS LIKELY.
THU NIGHT
E WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-190800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT...SUBSIDING TO 1 FT LATE.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
WED NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT. SHOWERS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS
LIKELY.
THU NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-190800-
EASTERN BAY-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
WED NIGHT
N WINDS 10 TO 15 KT. GUSTS UP TO 20 KT AFTER MIDNIGHT.
WAVES 1 FT. SHOWERS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
LIKELY.
THU NIGHT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-190800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT...SUBSIDING TO 1 FT LATE.
TUE
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TUE NIGHT...S WINDS 10 TO 15 KT
BECOMING SW LATE. GUSTS UP TO
20 KT. WAVES 2 FT.
WED
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND
TSTMS.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY.
THU
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY.
THU NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-190800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
WED NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY.
THU NIGHT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-190800-
PATUXENT RIVER TO BROOMES ISLAND MD-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 10 KT. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
WED NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
LIKELY.
THU NIGHT
E WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-190800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 2 TO 3 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING N AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. SHOWERS
LIKELY.
THU NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 10 TO 15 KT. WAVES 2 FT. SHOWERS LIKELY.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-190800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
759 PM EDT MON MAY 18 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT TUESDAY
TONIGHT
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WED
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
WED NIGHT...SE WINDS 10 TO 15 KT
BECOMING N 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
THU
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
E WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS LIKELY.
SAT
SE WINDS 10 KT. WAVES 1 FT. SHOWERS LIKELY.
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