576
FZUS51 KLWX 180928
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
528 AM EDT TUE AUG 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.
ANZ500-182100-
528 AM EDT TUE AUG 18 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE OHIO RIVER VALLEY
THROUGH TONIGHT WHILE A WEAKENING COLD FRONT STALLS TO THE SOUTH
OVER THE CAROLINAS. HIGH PRESSURE WILL MOVE OVERHEAD WEDNESDAY, THEN
MOVE OFFSHORE WEDNESDAY NIGHT AS A COLD FRONT APPROACHES FROM THE
GREAT LAKES. THE COLD FRONT WILL CROSS THE MID-ATLANTIC THURSDAY,
THEN LINGER NEARBY FRIDAY INTO THE WEEKEND AS ONE OR MORE WAVES OF
LOW PRESSURE RIDE ALONG THE FRONT STALLED NEAR THE COAST.
ANZ535-182100-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT. ISOLATED SHOWERS AND
TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
W WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY THROUGH THE NIGHT. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-182100-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
528 AM EDT TUE AUG 18 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. PATCHY FOG THIS
MORNING. ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM
THIS MORNING.
TONIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
WED
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
SE WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
AND TSTMS IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
SAT
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING, THEN SHOWERS LIKELY THROUGH THE NIGHT. A CHANCE OF SHOWERS
AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-182100-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
528 AM EDT TUE AUG 18 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. PATCHY FOG THIS
MORNING. ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM
THIS MORNING.
TONIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
NW WINDS AROUND 5 KT. WAVES FLAT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS. SHOWERS WITH A
CHANCE OF TSTMS.
THU NIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH
A CHANCE OF TSTMS.
FRI
NE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE DAY. A CHANCE OF TSTMS. SHOWERS LIKELY THROUGH THE
NIGHT.
SAT
SE WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY. A CHANCE
OF SHOWERS AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-182100-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. PATCHY FOG THIS
MORNING. ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM
THIS MORNING.
TONIGHT
NW WINDS AROUND 5 KT. WAVES FLAT.
WED
W WINDS AROUND 5 KT. WAVES FLAT.
WED NIGHT
SW WINDS AROUND 5 KT. WAVES FLAT.
THU
NW WINDS AROUND 5 KT. WAVES FLAT. SHOWERS WITH A CHANCE OF
TSTMS.
THU NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS.
SAT
E WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS IN THE MORNING,
THEN SHOWERS LIKELY THROUGH THE NIGHT. A CHANCE OF SHOWERS AFTER
MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-182100-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 TO 10 KT. WAVES 1 FT. ISOLATED SHOWERS AND TSTMS
THIS AFTERNOON.
TONIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
W WINDS AROUND 5 KT. WAVES FLAT.
WED NIGHT
SW WINDS 5 KT. WAVES FLAT.
THU
W WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF
TSTMS.
THU NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
E 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.
ANZ538-182100-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 KT. WAVES FLAT.
TONIGHT
NW WINDS AROUND 5 KT. WAVES FLAT.
WED
W WINDS 5 KT. WAVES FLAT.
WED NIGHT
SW WINDS 5 KT. WAVES FLAT.
THU
E WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF
TSTMS.
THU NIGHT
N WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS AND
TSTMS.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-182100-
CHESTER RIVER TO QUEENSTOWN MD-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT. PATCHY FOG THIS
MORNING. ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM
THIS MORNING.
TONIGHT
N WINDS AROUND 5 KT. WAVES FLAT.
WED
W WINDS AROUND 5 KT. WAVES FLAT.
WED NIGHT
SW WINDS AROUND 5 KT. WAVES FLAT.
THU
NW WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF
TSTMS.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY
WITH A CHANCE OF TSTMS.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
SAT
E WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS IN THE MORNING,
THEN SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-182100-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 TO 10 KT. WAVES 1 FT. ISOLATED SHOWERS AND TSTMS
THIS AFTERNOON.
TONIGHT
N 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. A CHANCE OF
SHOWERS.
THU...NW WINDS 5 KT
BECOMING E IN THE AFTERNOON. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
SAT...E WINDS 5 TO 10 KT
BECOMING SW AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS IN THE MORNING, THEN SHOWERS LIKELY THROUGH THE
NIGHT. A CHANCE OF SHOWERS AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-182100-
EASTERN BAY-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 TO 10 KT. WAVES 1 FT. PATCHY FOG THIS MORNING.
ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM THIS
MORNING.
TONIGHT
N WINDS AROUND 5 KT. WAVES FLAT.
WED
NW WINDS AROUND 5 KT. WAVES FLAT.
WED NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS.
THU
W WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF
TSTMS.
THU NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY
WITH A CHANCE OF TSTMS.
FRI
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
IN THE AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
SAT
SE WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-182100-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 TO 10 KT. WAVES 1 FT. PATCHY FOG THIS MORNING.
ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM THIS
MORNING.
TONIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
THU NIGHT...SE WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
FRI...NE WINDS 5 TO 10 KT
BECOMING E AFTER MIDNIGHT. WAVES 1 FT.
SAT...SE WINDS 5 TO 10 KT
BECOMING SW AFTER MIDNIGHT. WAVES 1 FT.
SHOWERS LIKELY. A CHANCE OF SHOWERS AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-182100-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 TO 10 KT. WAVES 1 FT. PATCHY FOG THIS MORNING.
ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM THIS
MORNING.
TONIGHT
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
THU NIGHT...SE WINDS 5 KT
BECOMING NW AFTER MIDNIGHT. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
FRI...NE WINDS 5 TO 10 KT
BECOMING E AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS THROUGH THE DAY, THEN SHOWERS LIKELY THROUGH THE
NIGHT.
SAT
SE WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-182100-
PATUXENT RIVER TO BROOMES ISLAND MD-
528 AM EDT TUE AUG 18 2026
TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT. PATCHY FOG THIS
MORNING. ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM
THIS MORNING.
TONIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
WED
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU
S WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS WITH A CHANCE OF
TSTMS.
THU NIGHT
S WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY, THEN SHOWERS LIKELY THROUGH THE NIGHT.
SAT
SE WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-182100-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
528 AM EDT TUE AUG 18 2026
TODAY
NW WINDS 10 KT. WAVES 1 FT. PATCHY FOG THIS MORNING.
ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM THIS
MORNING.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
WED
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
WED NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
THU
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS WITH A CHANCE OF
TSTMS.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
FRI...N WINDS 5 TO 10 KT
BECOMING SE AFTER MIDNIGHT. WAVES 1 FT.
A CHANCE OF SHOWERS THROUGH THE DAY. A CHANCE OF TSTMS. SHOWERS
LIKELY THROUGH THE NIGHT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-182100-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
528 AM EDT TUE AUG 18 2026
TODAY
NW WINDS 5 TO 10 KT. WAVES 1 FT. PATCHY FOG THIS MORNING.
ISOLATED SHOWERS AND TSTMS THIS AFTERNOON. VSBY 1 TO 3 NM THIS
MORNING.
TONIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WED
NW 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.
THU NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS WITH A CHANCE
OF TSTMS.
FRI...N WINDS 5 TO 10 KT
BECOMING E. WAVES 1 FT. A CHANCE OF
TSTMS. A CHANCE OF SHOWERS THROUGH THE DAY, THEN SHOWERS THROUGH THE
NIGHT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS, MAINLY IN THE
MORNING.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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