773
FZUS51 KLWX 120628
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
228 AM EDT WED AUG 12 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.
ANZ500-122000-
228 AM EDT WED AUG 12 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BE PERSISTENT OFF THE EAST COAST THROUGH
THURSDAY WHILE A COLD FRONT GRADUALLY APPROACHES FROM THE NORTH
FRIDAY DAILY THUNDERSTORM CHANCES CONTINUE FOR THE REMAINDER OF THE
WEEK. GUSTY WINDS AND FREQUENT CLOUD TO GROUND LIGHTNING WILL BE THE
PRIMARY THREATS WITH ANY STORMS. THE FRONT MAY PUSH TO THE SOUTH BY
FRIDAY NIGHT BEFORE RETURNING AGAIN SUNDAY INTO EARLY NEXT WEEK.
SMALL CRAFT ADVISORIES MAY BE NEEDED FRIDAY NIGHT.
ANZ535-122000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
228 AM EDT WED AUG 12 2026
OVERNIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS.
WED
NW WINDS AROUND 5 KT. WAVES 1 FT.
WED NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
N WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-122000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
228 AM EDT WED AUG 12 2026
OVERNIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT. A SLIGHT CHANCE OF
SHOWERS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT.
THU
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
N WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
SAT
E WINDS AROUND 5 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-122000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
228 AM EDT WED AUG 12 2026
OVERNIGHT
W WINDS 10 KT. WAVES 1 FT.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-122000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
228 AM EDT WED AUG 12 2026
OVERNIGHT
NW WINDS 10 KT. WAVES 1 FT.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT.
THU
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
FRI
NE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
SUN...S WINDS 10 TO 15 KT
BECOMING SW AFTER MIDNIGHT. WAVES 1 TO
2 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.
ANZ531-122000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
228 AM EDT WED AUG 12 2026
OVERNIGHT
NW WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE OF SHOWERS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
FRI
NE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT...NE WINDS 5 KT
BECOMING N 10 TO 15 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 TO
2 FT...SUBSIDING TO 1 FT OR LESS.
SUN
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. A
CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-122000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
228 AM EDT WED AUG 12 2026
OVERNIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS.
WED
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
WED NIGHT
W WINDS 5 KT. WAVES FLAT.
THU
W WINDS 5 KT. WAVES FLAT.
THU NIGHT
W WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
NE WINDS 5 KT. WAVES FLAT. SHOWERS LIKELY WITH A CHANCE OF
TSTMS.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT
OR LESS.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS. A CHANCE
OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-122000-
CHESTER RIVER TO QUEENSTOWN MD-
228 AM EDT WED AUG 12 2026
OVERNIGHT
NW WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE OF SHOWERS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
NE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT
OR LESS.
SUN
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS. A
CHANCE OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-122000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
228 AM EDT WED AUG 12 2026
OVERNIGHT
W WINDS 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF TSTMS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
FRI
N WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
FRI NIGHT...NE WINDS 5 KT
BECOMING N 10 TO 15 KT AFTER MIDNIGHT.
WAVES 1 FT.
SAT...NE WINDS 10 TO 15 KT
BECOMING SE 5 KT. WAVES 1 TO 2 FT.
SUN...S WINDS 15 TO 20 KT. WAVES 1 FT
BUILDING TO 3 FT. A CHANCE
OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-122000-
EASTERN BAY-
228 AM EDT WED AUG 12 2026
OVERNIGHT
NW WINDS 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF TSTMS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT
OR LESS.
SUN
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-122000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
228 AM EDT WED AUG 12 2026
OVERNIGHT
W WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE OF SHOWERS
AND TSTMS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS.
THU NIGHT
SW WINDS 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT...N WINDS 5 KT
BECOMING NE 10 TO 15 KT AFTER MIDNIGHT.
WAVES 1 TO 2 FT.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 TO
2 FT.
SUN...S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT
BUILDING TO 2 TO 3 FT.
A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-122000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
228 AM EDT WED AUG 12 2026
OVERNIGHT
NW WINDS 10 KT. WAVES 1 FT. A SLIGHT CHANCE OF SHOWERS
AND TSTMS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT.
THU
W WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES FLAT. A CHANCE OF SHOWERS.
FRI
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
SUN
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-122000-
PATUXENT RIVER TO BROOMES ISLAND MD-
228 AM EDT WED AUG 12 2026
OVERNIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS.
WED
NW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
THU
W WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
THU NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY.
FRI
N WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
FRI NIGHT
N WINDS AROUND 5 KT. WAVES 1 FT.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-122000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
228 AM EDT WED AUG 12 2026
OVERNIGHT
NW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
WED...NW WINDS 10 TO 15 KT
DIMINISHING TO 5 KT LATE. WAVES 1 TO
2 FT.
WED NIGHT...NW WINDS 5 KT
BECOMING SW IN THE LATE EVENING AND
OVERNIGHT. WAVES 1 FT.
THU
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU NIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT...NE WINDS 10 TO 15 KT
BECOMING SE 5 TO 10 KT. WAVES 1 TO
2 FT.
SUN...S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT
BUILDING TO 3 FT. A
CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-122000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
228 AM EDT WED AUG 12 2026
OVERNIGHT
NW WINDS 10 KT. WAVES 1 FT.
WED
NW WINDS 10 TO 15 KT. WAVES 1 FT.
WED NIGHT...NW WINDS 5 KT
BECOMING SW IN THE LATE EVENING AND
OVERNIGHT. WAVES 1 FT.
THU
W WINDS 5 TO 10 KT. WAVES 1 FT.
THU NIGHT
S WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...NE WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
SUN
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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