112
FZUS51 KLWX 201157
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
757 AM EDT SUN SEP 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.
ANZ500-202000-
757 AM EDT SUN SEP 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A WARM FRONT WILL LIFT NORTHWARD THROUGH THE AREA TODAY, BEFORE A
COLD FRONT MOVES THROUGH TONIGHT. A STRONG AREA OF HIGH PRESSURE
WILL BUILD TO OUR NORTH TOMORROW AND REMAIN IN PLACE THROUGH MUCH OF
THE WEEK, LEADING TO A PROLONGED PERIOD OF ONSHORE FLOW. SMALL
CRAFT ADVISORIES WILL LIKELY BE NEEDED FOR MUCH OF THE MONDAY
THROUGH THURSDAY TIME PERIOD, AND A FEW LOW-END GALE GUSTS CAN'T BE
RULED OUT ON TUESDAY OR WEDNESDAY.
ANZ535-202000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
757 AM EDT SUN SEP 20 2026
TODAY
SW WINDS 10 KT. WAVES 1 FT. SCATTERED SHOWERS THIS MORNING,
THEN SCATTERED SHOWERS WITH A CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT.
MON NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS.
TUE...NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 1 FT. SHOWERS.
TUE NIGHT...NE WINDS 10 TO 15 KT. GUSTS UP TO 30 KT
DIMINISHING
TO 20 KT AFTER MIDNIGHT. WAVES 1 FT. SHOWERS LIKELY.
WED
NE WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS LIKELY. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
THU
N WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-202000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
757 AM EDT SUN SEP 20 2026
TODAY
S WINDS 10 KT. WAVES 1 FT. ISOLATED SHOWERS THIS MORNING,
THEN SCATTERED SHOWERS WITH A CHANCE OF TSTMS THIS AFTERNOON.
TONIGHT...W WINDS AROUND 5 KT
BECOMING N LATE. WAVES 1 FT. A
CHANCE OF SHOWERS AND TSTMS.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT.
MON NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 15 TO 20 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT. SHOWERS LIKELY.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
WED
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF TSTMS IN THE
MORNING. SHOWERS LIKELY. A CHANCE OF SHOWERS AFTER MIDNIGHT.
THU
N 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.
ANZ537-202000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 10 KT. WAVES 1 FT.
TONIGHT...S WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS AND TSTMS.
MON
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
MON NIGHT
E WINDS 15 TO 20 KT. WAVES 3 FT. SHOWERS LIKELY.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 5 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
WED
NE WINDS 25 TO 30 KT. WAVES 4 FT. A CHANCE OF TSTMS IN THE
MORNING. SHOWERS LIKELY, THEN A CHANCE OF SHOWERS AFTER MIDNIGHT.
THU
NE WINDS 20 TO 25 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-202000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SCATTERED SHOWERS THIS MORNING, THEN SCATTERED SHOWERS WITH A CHANCE
OF TSTMS THIS AFTERNOON.
TONIGHT...W WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 FT. NUMEROUS SHOWERS WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED
NE WINDS 20 TO 25 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-202000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. SCATTERED SHOWERS
THIS MORNING, THEN NUMEROUS SHOWERS WITH A CHANCE OF TSTMS THIS
AFTERNOON.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. NUMEROUS SHOWERS WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. SHOWERS LIKELY.
TUE
NE WINDS 20 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. A
CHANCE OF SHOWERS.
WED
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-202000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
SW WINDS 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. NUMEROUS
SHOWERS THIS MORNING, THEN NUMEROUS SHOWERS WITH A CHANCE OF TSTMS
THIS AFTERNOON.
TONIGHT...W WINDS 5 KT
BECOMING N LATE. WAVES 1 FT. NUMEROUS
SHOWERS WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 KT. WAVES 1 FT.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
THU
NE 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.
ANZ539-202000-
CHESTER RIVER TO QUEENSTOWN MD-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SCATTERED SHOWERS THIS MORNING, THEN SCATTERED SHOWERS WITH A CHANCE
OF TSTMS THIS AFTERNOON.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES
1 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 KT. WAVES 1 TO 2 FT.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. A CHANCE OF SHOWERS.
WED
NE WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-202000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. SCATTERED SHOWERS
THIS MORNING, THEN SCATTERED SHOWERS WITH A CHANCE OF TSTMS THIS
AFTERNOON.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING SW 5 KT LATE IN THE
EVENING, THEN BECOMING N 10 TO 15 KT AFTER MIDNIGHT. WAVES 1 TO
2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
MON NIGHT
NE WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
SHOWERS LIKELY.
WED
NE WINDS 20 TO 25 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-202000-
EASTERN BAY-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SCATTERED SHOWERS THIS MORNING, THEN SCATTERED SHOWERS WITH A CHANCE
OF TSTMS THIS AFTERNOON.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING W 5 KT IN THE LATE EVENING
AND EARLY MORNING, THEN BECOMING N LATE. WAVES 1 FT. SHOWERS LIKELY
WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT.
MON NIGHT...NE WINDS 10 KT
INCREASING TO 15 TO 20 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED
NE WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-202000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. ISOLATED
SHOWERS.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NW
5 KT AFTER MIDNIGHT, THEN BECOMING N 10 TO 15 KT LATE. WAVES 1 TO
2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
NE WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 25 TO 30 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
WED
NE WINDS 25 TO 30 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 25 TO 30 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-202000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
ISOLATED SHOWERS THIS MORNING, THEN A SLIGHT CHANCE OF TSTMS WITH
ISOLATED SHOWERS THIS AFTERNOON.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT.
MON NIGHT
NE WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS LIKELY.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 TO 3 FT.
SHOWERS LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. A
CHANCE OF SHOWERS.
WED
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-202000-
PATUXENT RIVER TO BROOMES ISLAND MD-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 10 KT. WAVES 1 FT. ISOLATED SHOWERS THIS AFTERNOON.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. A CHANCE OF SHOWERS AND TSTMS.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 1 FT.
SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT. WAVES 1 FT. SHOWERS LIKELY. A CHANCE OF
SHOWERS AFTER MIDNIGHT.
THU
NE WINDS 15 TO 20 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-202000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND TSTMS.
MON
NE WINDS 10 TO 15 KT. WAVES 2 FT.
MON NIGHT
E WINDS 15 TO 20 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 4 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 5 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
WED
NE WINDS 25 TO 30 KT. WAVES 5 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS IN THE MORNING. A CHANCE OF SHOWERS.
THU
NE WINDS 25 TO 30 KT. WAVES 4 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-202000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
757 AM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON
TODAY
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 FT. A CHANCE OF SHOWERS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 2 FT. SHOWERS
LIKELY.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT. A
CHANCE OF SHOWERS AND TSTMS.
WED
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF TSTMS IN THE
MORNING. A CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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