519
FZUS51 KLWX 130858
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
458 AM EDT WED MAY 13 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.
ANZ500-132300-
458 AM EDT WED MAY 13 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COLD FRONT WILL APPROACH TODAY AND CROSS THE WATERS TONIGHT. THE
ASSOCIATED LOW WILL LINGER OVER NEW ENGLAND THURSDAY BEFORE HIGH
PRESSURE BUILDS IN FROM THE WEST FRIDAY. THE HIGH WILL THEN SLIDE
OFF THE COAST AND REMAIN THERE THROUGH THE WEEKEND. SMALL CRAFT
ADVISORIES MAY BE NEEDED AT TIMES THURSDAY THROUGH FRIDAY.
ANZ535-132300-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
REST OF THE OVERNIGHT
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT
BECOMING NW
LATE. WAVES 1 FT. SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-132300-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING
REST OF THE OVERNIGHT
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT.
SHOWERS WITH A CHANCE OF TSTMS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-132300-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
SW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 3 FT...SUBSIDING TO 1 FT AFTER
MIDNIGHT. SHOWERS LIKELY.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
ANZ530-132300-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
SW WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SUN
SW WINDS AROUND 5 KT. WAVES FLAT.
ANZ531-132300-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
S WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT.
TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 3 FT...SUBSIDING TO 1 FT AFTER
MIDNIGHT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES FLAT.
ANZ538-132300-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
S WINDS 10 KT WITH GUSTS TO 20 KT. WAVES
1 FT.
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING W
5 KT AFTER MIDNIGHT. WAVES 1 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT...W WINDS 5 TO 10 KT IN THE EVENING
BECOMING LIGHT.
WAVES 1 FT OR LESS.
SAT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SUN
S WINDS AROUND 5 KT. WAVES FLAT.
ANZ539-132300-
CHESTER RIVER TO QUEENSTOWN MD-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES FLAT.
ANZ532-132300-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
S WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT.
TODAY
S WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 4 FT...SUBSIDING TO 1 FT AFTER
MIDNIGHT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ540-132300-
EASTERN BAY-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
S WINDS 15 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING SW
5 TO 10 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
FRI NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN
S WINDS AROUND 5 KT. WAVES FLAT.
ANZ533-132300-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
SW WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT.
TODAY...S WINDS 15 TO 20 KT
INCREASING TO 20 TO 25 KT LATE. GUSTS
UP TO 30 KT. WAVES 3 FT.
TONIGHT...S WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
DIMINISHING TO
10 TO 15 KT WITH GUSTS TO 20 KT LATE IN THE EVENING, THEN BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 4 FT...SUBSIDING TO 1 FT AFTER
MIDNIGHT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
ANZ541-132300-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
S WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
1 FT...EXCEPT AROUND 3 FT NEAR THE MOUTH OF THE CHOPTANK.
TODAY
S WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 TO 3 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W
5 TO 10 KT AFTER MIDNIGHT. WAVES 3 FT...SUBSIDING TO 1 FT AFTER
MIDNIGHT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
THU NIGHT
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES FLAT.
ANZ542-132300-
PATUXENT RIVER TO BROOMES ISLAND MD-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
SW WINDS 10 KT WITH GUSTS TO 25 KT. WAVES
1 FT.
TODAY
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
BECOMING W
5 KT AFTER MIDNIGHT. WAVES 1 FT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU NIGHT
NW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS AROUND 5 KT. WAVES 1 FT.
ANZ534-132300-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
SW WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
3 FT.
TODAY...S WINDS 15 TO 20 KT
INCREASING TO 20 TO 25 KT LATE. GUSTS
UP TO 30 KT. WAVES 3 FT.
TONIGHT...S WINDS 20 TO 25 KT WITH GUSTS TO 30 KT
BECOMING SW
10 TO 15 KT AFTER MIDNIGHT, THEN BECOMING W 5 TO 10 KT LATE. WAVES
4 FT...SUBSIDING TO 2 FT AFTER MIDNIGHT. SHOWERS.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 3 FT.
THU NIGHT
NW WINDS 15 TO 20 KT. WAVES 3 FT.
FRI
NW WINDS 15 TO 20 KT. WAVES 3 FT.
FRI NIGHT
SW WINDS AROUND 5 KT. WAVES 1 FT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
ANZ543-132300-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
458 AM EDT WED MAY 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT
REST OF THE OVERNIGHT
SW WINDS 20 KT WITH GUSTS TO 25 KT. WAVES
2 FT.
TODAY...S WINDS 15 TO 20 KT
BECOMING 20 KT LATE. GUSTS UP TO
30 KT. WAVES 2 TO 3 FT.
TONIGHT...S WINDS 15 TO 20 KT WITH GUSTS TO 30 KT
BECOMING SW
10 TO 15 KT AFTER MIDNIGHT, THEN BECOMING W 5 TO 10 KT LATE. WAVES
2 TO 3 FT. SHOWERS LIKELY.
THU
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
THU NIGHT
NW WINDS 15 TO 20 KT. WAVES 2 FT.
FRI
NW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
FRI NIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
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