034
FZUS51 KLWX 170704
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
304 AM EDT MON AUG 17 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.
ANZ500-172200-
304 AM EDT MON AUG 17 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COLD FRONT APPROACHING FROM THE UPPER OHIO RIVER VALLEY WILL
CROSS THE REGION BY TONIGHT. HIGH PRESSURE WILL BUILD IN FROM THE
MIDWEST TUESDAY, THEN ANOTHER COLD FRONT WILL APPROACH FROM THE WEST
LATE WEDNESDAY INTO THURSDAY, THEN LINGERS INTO FRIDAY.
ANZ535-172200-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
TUE
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED
W WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
N WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY. A CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-172200-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE
OF SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED
W WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
THU
N WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY. A CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-172200-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 15 KT. WAVES 2 FT. A CHANCE OF
SHOWERS WITH A SLIGHT CHANCE OF TSTMS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TONIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS AROUND 5 KT. WAVES FLAT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-172200-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 10 KT. WAVES 1 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NW WINDS AROUND 5 KT. WAVES FLAT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED NIGHT
W WINDS AROUND 5 KT. WAVES FLAT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY WITH A
CHANCE OF TSTMS THROUGH THE NIGHT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE AFTERNOON. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE
NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-172200-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 10 KT. WAVES 2 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF TSTMS THROUGH
THE NIGHT. SHOWERS LIKELY.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-172200-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A
CHANCE OF SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NW WINDS 5 KT. WAVES FLAT.
TUE
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS 5 KT. WAVES FLAT.
WED NIGHT
W WINDS 5 KT. WAVES FLAT.
THU
NE WINDS 5 KT. WAVES FLAT. A CHANCE OF TSTMS THROUGH THE
NIGHT. SHOWERS LIKELY.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE DAY. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE
NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-172200-
CHESTER RIVER TO QUEENSTOWN MD-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 10 KT. WAVES 1 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS 5 KT. WAVES FLAT.
WED NIGHT
SW WINDS 5 KT. WAVES FLAT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY WITH A
CHANCE OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE DAY. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE
NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-172200-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 15 KT. WAVES 2 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TONIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-172200-
EASTERN BAY-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 10 KT. WAVES 2 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TONIGHT
NW WINDS AROUND 5 KT. WAVES FLAT.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS 5 KT. WAVES FLAT.
WED NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY WITH
A CHANCE OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE DAY. SHOWERS LIKELY WITH A CHANCE OF TSTMS THROUGH THE
NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-172200-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 15 KT. WAVES 2 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
WED
W WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
THU...N WINDS 5 KT
BECOMING E IN THE EVENING, THEN BECOMING N
AFTER MIDNIGHT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS
THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY. A CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-172200-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 15 KT. WAVES 2 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
TONIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
THU
N WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING. SHOWERS LIKELY. A CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-172200-
PATUXENT RIVER TO BROOMES ISLAND MD-
304 AM EDT MON AUG 17 2026
REST OF THE OVERNIGHT
SW WINDS 10 KT. WAVES 1 FT. A CHANCE OF
SHOWERS.
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
WED
W WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
THU
N WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS IN
THE MORNING, THEN SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-172200-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
304 AM EDT MON AUG 17 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
REST OF THE OVERNIGHT
SW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
3 FT. SHOWERS LIKELY WITH A SLIGHT CHANCE OF TSTMS.
TODAY...W WINDS 10 TO 15 KT
BECOMING NW 5 TO 10 KT IN THE
AFTERNOON. WAVES 3 FT...SUBSIDING TO 1 FT IN THE AFTERNOON.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
TUE
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WED
W WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-172200-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
304 AM EDT MON AUG 17 2026
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
REST OF THE OVERNIGHT
SW WINDS 20 KT. WAVES 2 FT. SHOWERS LIKELY
WITH A SLIGHT CHANCE OF TSTMS. PATCHY FOG. VSBY 1 NM OR LESS.
TODAY
W WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TONIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
TUE
NW WINDS 5 TO 10 KT. WAVES 1 FT.
TUE NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WED
W WINDS 5 KT. WAVES FLAT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY AFTER MIDNIGHT.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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