488
FZUS51 KLWX 172358
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
757 PM EDT THU SEP 17 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.
ANZ500-180800-
757 PM EDT THU SEP 17 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A COLD FRONT WILL SINK SOUTHWARD TONIGHT, EVENTUALLY CROSSING THE
LOCAL WATERS BY FRIDAY MORNING. HIGH PRESSURE BRIEFLY BUILDS OVER
THE NORTHEASTERN U.S. ON SATURDAY BEFORE ANOTHER FRONTAL SYSTEM
LOOMS NEARBY ON SUNDAY AND INTO EARLY NEXT WEEK. SMALL CRAFT
ADVISORIES MAY BE NEEDED ON FRIDAY BEHIND THE COLD FRONT. WIND GUSTS
REMAIN ELEVATED AT TIMES FRIDAY NIGHT THROUGH MONDAY, WHICH MAY
PROMPT ADDITIONAL ADVISORIES.
ANZ535-180800-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
757 PM EDT THU SEP 17 2026
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. ISOLATED SHOWERS AND
TSTMS THIS EVENING, THEN ISOLATED SHOWERS AFTER MIDNIGHT.
FRI
N WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI NIGHT
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT
E WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN NIGHT
W WINDS AROUND 5 KT. WAVES 1 FT. SHOWERS LIKELY.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
TUE
NE WINDS 10 TO 15 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.
ANZ536-180800-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
757 PM EDT THU SEP 17 2026
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. ISOLATED SHOWERS AND
TSTMS THIS EVENING.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN NIGHT
W WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SHOWERS.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS IN THE
AFTERNOON. SHOWERS LIKELY THROUGH THE NIGHT.
TUE
NE WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. SHOWERS LIKELY .
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-180800-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
757 PM EDT THU SEP 17 2026
TONIGHT...S WINDS 10 KT
BECOMING W LATE. WAVES 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 2 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN
THE AFTERNOON. A CHANCE OF TSTMS THROUGH THE NIGHT. SHOWERS LIKELY
THROUGH THE NIGHT.
TUE...NE WINDS 20 TO 25 KT. WAVES 3 FT
BUILDING TO 5 FT. SHOWERS
LIKELY .
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-180800-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
757 PM EDT THU SEP 17 2026
TONIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. SCATTERED SHOWERS
WITH ISOLATED TSTMS THIS EVENING, THEN ISOLATED SHOWERS AFTER
MIDNIGHT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A CHANCE
OF SHOWERS.
SUN NIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. SHOWERS LIKELY.
MON
NE WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-180800-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
757 PM EDT THU SEP 17 2026
TONIGHT...S WINDS 10 KT
BECOMING W AFTER MIDNIGHT. WAVES 1 FT.
ISOLATED TSTMS THIS EVENING. ISOLATED SHOWERS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
SUN NIGHT...SW WINDS 5 TO 10 KT
BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
MON
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT. WAVES 3 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.
ANZ538-180800-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
757 PM EDT THU SEP 17 2026
TONIGHT
SW WINDS 5 KT. WAVES FLAT. ISOLATED SHOWERS AND TSTMS
THIS EVENING.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
SUN NIGHT...SW WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES
1 FT. SHOWERS LIKELY.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 15 TO 20 KT. WAVES 2 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.
ANZ539-180800-
CHESTER RIVER TO QUEENSTOWN MD-
757 PM EDT THU SEP 17 2026
TONIGHT...SW WINDS 5 TO 10 KT
BECOMING NW LATE. WAVES 1 FT.
ISOLATED SHOWERS AND TSTMS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN NIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. SHOWERS LIKELY.
MON
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-180800-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
757 PM EDT THU SEP 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING
TONIGHT...S WINDS 10 KT WITH GUSTS TO 20 KT
BECOMING W AFTER
MIDNIGHT. WAVES 1 TO 2 FT. ISOLATED SHOWERS AND TSTMS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 2 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
SUN NIGHT...SW WINDS 10 TO 15 KT
BECOMING NW AFTER MIDNIGHT.
GUSTS UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
MON
NE WINDS 10 TO 15 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT. WAVES 3 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.
ANZ540-180800-
EASTERN BAY-
757 PM EDT THU SEP 17 2026
TONIGHT...S WINDS 10 KT
BECOMING W LATE. WAVES 1 FT. ISOLATED
TSTMS. ISOLATED SHOWERS THIS EVENING, THEN SCATTERED SHOWERS AFTER
MIDNIGHT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN NIGHT...SW WINDS 5 TO 10 KT
BECOMING NW AFTER MIDNIGHT. WAVES
1 FT. SHOWERS LIKELY.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 15 TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-180800-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
757 PM EDT THU SEP 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING
TONIGHT...S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING W
5 KT LATE. WAVES 1 TO 2 FT. ISOLATED SHOWERS AND TSTMS.
FRI
N WINDS 10 TO 15 KT. WAVES 2 FT.
FRI NIGHT
NE WINDS 10 TO 15 KT. WAVES 2 FT.
SAT
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 2 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A CHANCE
OF SHOWERS.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT. SHOWERS LIKELY.
MON
NE WINDS 10 TO 15 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT. WAVES 3 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.
ANZ541-180800-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
757 PM EDT THU SEP 17 2026
TONIGHT...S WINDS 10 KT WITH GUSTS TO 20 KT
BECOMING W LATE.
WAVES 1 FT. ISOLATED SHOWERS AND TSTMS.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
NE WINDS 10 TO 15 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING NW 5 TO 10 KT AFTER
MIDNIGHT. WAVES 1 FT. SHOWERS LIKELY.
MON
NE WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
TUE
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.
ANZ542-180800-
PATUXENT RIVER TO BROOMES ISLAND MD-
757 PM EDT THU SEP 17 2026
TONIGHT...S WINDS 5 TO 10 KT
BECOMING W LATE. WAVES 1 FT.
FRI
N WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
MON
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS. SHOWERS
LIKELY AFTER MIDNIGHT.
TUE
NE WINDS 15 TO 20 KT. WAVES 1 FT. SHOWERS LIKELY .
ANZ534-180800-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
757 PM EDT THU SEP 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING
TONIGHT...S WINDS 15 KT WITH GUSTS TO 20 KT
BECOMING W LATE.
WAVES 1 TO 2 FT.
FRI
N WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SAT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SAT NIGHT
SE WINDS 10 TO 15 KT. WAVES 2 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING W AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 2 FT. A CHANCE OF SHOWERS.
MON...N WINDS 10 TO 15 KT
BECOMING NE. WAVES 1 TO 2 FT. A CHANCE
OF SHOWERS.
TUE...NE WINDS 20 TO 25 KT. WAVES 3 FT
BUILDING TO 5 FT. A CHANCE
OF SHOWERS.
ANZ543-180800-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
757 PM EDT THU SEP 17 2026
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING
TONIGHT...S WINDS 15 KT WITH GUSTS TO 20 KT
BECOMING SW LATE.
WAVES 1 TO 2 FT.
FRI
NW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
E WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
SE WINDS 10 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT...S WINDS 10 TO 15 KT
BECOMING SW AFTER MIDNIGHT. GUSTS
UP TO 20 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
MON
NE WINDS 10 TO 15 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
TUE
NE WINDS 20 TO 25 KT. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
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