974
FZUS51 KLWX 202357
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
757 PM EDT MON JUL 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-
757 PM EDT MON JUL 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A WARM FRONT WILL RETURN NORTHWARD TONIGHT INTO TUESDAY, FOLLOWED BY
ANOTHER COLD FRONT TUESDAY NIGHT INTO WEDNESDAY. HIGH PRESSURE WILL
BUILD IN FROM THE WEST THURSDAY AND FRIDAY. SMALL CRAFT ADVISORIES
WILL LIKELY BE NEEDED WEDNESDAY THROUGH EARLY THURSDAY.
ANZ535-210800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
757 PM EDT MON JUL 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING...
TONIGHT
S WINDS 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND TSTMS
AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE LATE MORNING
AND AFTERNOON. WAVES 1 FT. SHOWERS AND TSTMS.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS AND TSTMS LIKELY.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. SCATTERED SHOWERS WITH A
CHANCE OF TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-210800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
757 PM EDT MON JUL 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING...
TONIGHT
SE WINDS 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND TSTMS
AFTER MIDNIGHT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TSTMS WITH A CHANCE OF SHOWERS.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
AND TSTMS LIKELY.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-210800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
ISOLATED SHOWERS AND TSTMS THIS EVENING, THEN A CHANCE OF SHOWERS
AND TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
AND TSTMS LIKELY.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT. SHOWERS AND TSTMS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
WITH TSTMS LIKELY.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-210800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS AND TSTMS.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS WITH A CHANCE OF TSTMS.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES FLAT.
SAT
E WINDS AROUND 5 KT. WAVES FLAT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-210800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
SHOWERS AND TSTMS.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SCATTERED SHOWERS WITH A CHANCE OF TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-210800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
757 PM EDT MON JUL 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
LATE TUESDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
AND TSTMS.
TUE NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SCATTERED SHOWERS WITH A CHANCE OF TSTMS.
WED NIGHT
NW WINDS 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES FLAT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SE WINDS AROUND 5 KT. WAVES FLAT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-210800-
CHESTER RIVER TO QUEENSTOWN MD-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
TUE
S WINDS 15 TO 20 KT. GUSTS UP TO 25 KT. WAVES 2 FT. SHOWERS
AND TSTMS.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SCATTERED SHOWERS WITH A CHANCE OF TSTMS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
E WINDS AROUND 5 KT. WAVES FLAT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-210800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT...BUILDING TO 2 TO 3 FT AFTER MIDNIGHT. A CHANCE OF SHOWERS AND
TSTMS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
SHOWERS AND TSTMS.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
SCATTERED SHOWERS.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-210800-
EASTERN BAY-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
A CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
TUE
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS AND
TSTMS.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
AND TSTMS LIKELY.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 FT. A
CHANCE OF SHOWERS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
E WINDS AROUND 5 KT. WAVES FLAT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-210800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT
BUILDING TO 2 TO 3 FT LATE THIS EVENING AND OVERNIGHT. A CHANCE OF
SHOWERS AND TSTMS AFTER MIDNIGHT.
TUE
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
SHOWERS AND TSTMS LIKELY.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
SHOWERS AND TSTMS LIKELY.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS AND TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-210800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
A CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
TUE...S WINDS 15 TO 20 KT. GUSTS UP TO 20 KT
INCREASING TO 30 KT
LATE. WAVES 2 FT. SHOWERS AND TSTMS LIKELY.
TUE NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO
3 FT. SHOWERS AND TSTMS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
AND TSTMS LIKELY.
WED NIGHT
NW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS AND TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-210800-
PATUXENT RIVER TO BROOMES ISLAND MD-
757 PM EDT MON JUL 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM TUESDAY AFTERNOON THROUGH
LATE TUESDAY NIGHT...
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
ISOLATED SHOWERS AND TSTMS THIS EVENING, THEN A CHANCE OF SHOWERS
AND TSTMS AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
AND TSTMS LIKELY.
TUE NIGHT
SW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT. SHOWERS
AND TSTMS.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
WITH TSTMS LIKELY.
WED NIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU
N WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT...NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING
TO AROUND 5 KT AFTER MIDNIGHT. WAVES 1 FT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-210800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO 3 FT.
ISOLATED SHOWERS AND TSTMS THIS EVENING, THEN A CHANCE OF SHOWERS
AND TSTMS AFTER MIDNIGHT.
TUE...S WINDS 15 TO 20 KT. GUSTS UP TO 25 KT
INCREASING TO 30 KT
LATE. WAVES 3 FT. SHOWERS AND TSTMS LIKELY.
TUE NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 4 FT. SHOWERS
WITH TSTMS LIKELY.
WED NIGHT...W WINDS 10 TO 15 KT
BECOMING NW AFTER MIDNIGHT. GUSTS
UP TO 25 KT. WAVES 3 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
N WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE MORNING. WAVES
2 TO 3 FT.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-210800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
757 PM EDT MON JUL 20 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT
TONIGHT
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. ISOLATED
SHOWERS AND TSTMS THIS EVENING, THEN A CHANCE OF SHOWERS AND TSTMS
AFTER MIDNIGHT.
TUE
S WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 TO 3 FT.
SHOWERS AND TSTMS LIKELY.
TUE NIGHT
SW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS AND TSTMS.
WED
SW WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
WITH TSTMS LIKELY.
WED NIGHT...W WINDS 15 TO 20 KT
BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. GUSTS UP TO 25 KT. WAVES 2 FT. SHOWERS WITH A CHANCE OF
TSTMS.
THU
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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