994
FZUS51 KLWX 201827
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
227 PM 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.
ANZ500-210800-
227 PM 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 NIGHT
THROUGH THURSDAY TIME PERIOD, AND A FEW LOW-END GALE GUSTS CAN'T BE
RULED OUT ON TUESDAY OR WEDNESDAY.
ANZ535-210800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
227 PM EDT SUN SEP 20 2026
THIS AFTERNOON
SW WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
TONIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 KT. WAVES 1 FT.
MON NIGHT
E WINDS 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
TUE
NE WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS.
TUE NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS LIKELY.
WED
NE WINDS 10 TO 15 KT. WAVES 1 FT. SHOWERS LIKELY, MAINLY IN
THE MORNING.
THU
NE WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS THROUGH
THE DAY.
ANZ536-210800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
227 PM EDT SUN SEP 20 2026
THIS AFTERNOON
SW WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
TONIGHT...W WINDS 5 KT
BECOMING N LATE. WAVES 1 FT. SCATTERED
SHOWERS.
MON
NE WINDS 10 KT. WAVES 1 FT.
MON NIGHT
E WINDS 10 KT. WAVES 1 FT. WIDESPREAD SHOWERS.
TUE
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. SHOWERS
WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. SHOWERS LIKELY THROUGH
THE DAY, THEN A CHANCE OF SHOWERS THROUGH THE NIGHT.
THU
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS
THROUGH THE DAY.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-210800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
227 PM EDT SUN SEP 20 2026
THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS WITH
ISOLATED TSTMS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N LATE. WAVES 1 FT.
SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 3 FT.
NUMEROUS SHOWERS.
TUE
NE WINDS 15 TO 20 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 2 TO 3 FT. SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 4 FT.
SHOWERS LIKELY.
WED
NE WINDS 20 TO 25 KT. WAVES 4 FT. SHOWERS LIKELY THROUGH THE
DAY, THEN A CHANCE OF SHOWERS THROUGH THE NIGHT.
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.
ANZ530-210800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
227 PM EDT SUN SEP 20 2026
THIS AFTERNOON
SW WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
TONIGHT...W WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES
1 FT. NUMEROUS 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. WIDESPREAD SHOWERS.
TUE
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS THROUGH
THE DAY.
THU
NE WINDS 15 TO 20 KT. WAVES 2 FT.
ANZ531-210800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 10 KT. WAVES 2 FT. NUMEROUS SHOWERS.
TONIGHT...W WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT WITH GUSTS TO
20 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS LIKELY.
WED
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT.
ANZ538-210800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
227 PM EDT SUN SEP 20 2026
THIS AFTERNOON
SW WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS.
TONIGHT...W WINDS 5 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 FT.
NUMEROUS SHOWERS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WIDESPREAD SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
ANZ539-210800-
CHESTER RIVER TO QUEENSTOWN MD-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 10 TO 15 KT. WAVES 2 FT. NUMEROUS SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES
1 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. WIDESPREAD SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED
NE WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
THU
NE WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
ANZ532-210800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 10 KT. WAVES 2 FT. NUMEROUS SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 2 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS.
TUE NIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. SHOWERS
LIKELY.
WED
NE WINDS 20 TO 25 KT. WAVES 3 FT. SHOWERS LIKELY, MAINLY IN
THE MORNING.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS IN THE
MORNING.
ANZ540-210800-
EASTERN BAY-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 10 TO 15 KT. WAVES 1 FT. NUMEROUS SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT. SHOWERS
LIKELY.
WED
NE WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. SHOWERS LIKELY, MAINLY
IN THE MORNING.
THU
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS IN THE
MORNING.
ANZ533-210800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 10 TO 15 KT. WAVES 2 FT. NUMEROUS SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 2 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS.
TUE NIGHT
NE WINDS 20 KT WITH GUSTS TO 30 KT. WAVES 4 FT. SHOWERS
LIKELY.
WED...NE WINDS 20 KT
INCREASING TO 25 TO 30 KT. WAVES 4 FT.
SHOWERS LIKELY, MAINLY IN THE MORNING.
THU
NE WINDS 20 TO 25 KT. WAVES 4 FT. A CHANCE OF SHOWERS IN THE
MORNING.
ANZ541-210800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. NUMEROUS
SHOWERS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
WIDESPREAD SHOWERS.
TUE
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SHOWERS.
TUE NIGHT
NE WINDS 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT. SHOWERS
LIKELY.
WED
NE WINDS 20 TO 25 KT. WAVES 3 FT. SHOWERS LIKELY, MAINLY IN
THE MORNING.
THU
NE WINDS 20 TO 25 KT. WAVES 3 FT. A CHANCE OF SHOWERS IN THE
MORNING.
ANZ542-210800-
PATUXENT RIVER TO BROOMES ISLAND MD-
227 PM EDT SUN SEP 20 2026
THIS AFTERNOON
S WINDS 10 KT. WAVES 1 FT. NUMEROUS SHOWERS WITH
ISOLATED TSTMS.
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WIDESPREAD SHOWERS.
TUE
NE WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT. SHOWERS
WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
SHOWERS LIKELY.
WED
NE WINDS 15 TO 20 KT. WAVES 1 FT. SHOWERS LIKELY THROUGH THE
DAY, THEN A CHANCE OF SHOWERS THROUGH THE NIGHT.
THU
NE WINDS 15 TO 20 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
MORNING.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-210800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
NUMEROUS SHOWERS WITH ISOLATED TSTMS.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. WAVES 2 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 3 FT.
NUMEROUS SHOWERS.
TUE...E WINDS 15 TO 20 KT. GUSTS UP TO 20 KT
INCREASING TO 30 KT
IN THE AFTERNOON. WAVES 2 FT...BUILDING TO 4 FT IN THE AFTERNOON.
SHOWERS WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 5 FT.
SHOWERS LIKELY.
WED
NE WINDS 25 TO 30 KT. WAVES 5 FT. SHOWERS LIKELY THROUGH THE
DAY, THEN A CHANCE OF SHOWERS THROUGH THE NIGHT.
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.
ANZ543-210800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
227 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT MONDAY MORNING
THIS AFTERNOON
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
NUMEROUS SHOWERS WITH ISOLATED TSTMS.
TONIGHT...S WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. SCATTERED SHOWERS.
MON
NE WINDS 10 TO 15 KT. GUSTS UP TO 20 KT. WAVES 1 FT.
MON NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. SCATTERED SHOWERS.
TUE
NE WINDS 15 TO 20 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
TUE NIGHT
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
SHOWERS LIKELY.
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.
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