Coastal Flood Warnings/Watches/Statements
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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WHUS41 KBOX 051746
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
146 PM EDT Sat Sep 5 2026
MAZ022>024-061200-
/O.NEW.KBOX.CF.Y.0006.260905T2100Z-260906T0300Z/
/O.CON.KBOX.RP.S.0012.260906T0600Z-260907T0000Z/
Barnstable MA-Dukes MA-Nantucket MA-
146 PM EDT Sat Sep 5 2026
...COASTAL FLOOD ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 PM EDT THIS EVENING...
...HIGH RIP CURRENT RISK REMAINS IN EFFECT FROM LATE TONIGHT
THROUGH SUNDAY EVENING...
* WHAT...For the Coastal Flood Advisory, up to one half foot of
inundation above ground level expected in low-lying areas near
shorelines and tidal waterways (2.9 to 11.4 feet Mean Lower
Low Water). For the High Rip Current Risk, dangerous rip
currents expected.
* WHERE...Barnstable MA, Dukes MA and Nantucket MA Counties.
* WHEN...For the Coastal Flood Advisory, from 5 PM this
afternoon to 11 PM EDT this evening. For the High Rip Current
Risk, from late tonight through Sunday evening.
* IMPACTS...Roads remain passable. Low lying areas and roads
near Nantucket Harbor, including Easy Street, may experience
pockets of shallow flooding less than one foot deep. Rip
currents can sweep even the best swimmers away from shore into
deeper water.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
Swim near a lifeguard. If caught in a rip current, relax and
float. Don`t swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.
&&
&&
Time of high total tides are approximate to the nearest hour.
Buzzards Bay at Woods Hole
MLLW Categories - Minor 5.5 ft, Moderate 7.0 ft, Major 8.5 ft
MHHW Categories - Minor 3.5 ft, Moderate 5.0 ft, Major 6.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/04 PM 3.1/ 3.6 1.1/ 1.6 0.7/ 1.1 2 None
06/04 AM 2.5/ 3.0 0.5/ 1.0 0.8/ 1.3 1 None
06/05 PM 3.2/ 3.7 1.3/ 1.8 0.8/ 1.3 1 None
07/05 AM 2.3/ 2.8 0.4/ 0.9 0.6/ 1.1 1 None
07/06 PM 3.2/ 3.7 1.2/ 1.7 0.7/ 1.1 1 None
08/06 AM 2.1/ 2.6 0.1/ 0.6 0.1/ 0.6 1 None
Chatham MA - East Coast
MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft
MHHW Categories - Minor 3.8 ft, Moderate 6.3 ft, Major 7.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/07 PM 6.4/ 6.9 1.2/ 1.7 0.8/ 1.3 3 None
06/08 AM 5.2/ 5.7 0.0/ 0.5 0.9/ 1.4 3 None
06/08 PM 6.2/ 6.8 1.1/ 1.6 0.7/ 1.1 3 None
07/09 AM 5.1/ 5.6 -0.2/ 0.3 0.7/ 1.1 3 None
07/09 PM 5.9/ 6.4 0.7/ 1.1 0.2/ 0.8 2 None
08/10 AM 5.0/ 5.5 -0.2/ 0.2 0.2/ 0.8 2 None
Chatham - South side
MLLW Categories - Minor 9.0 ft, Moderate 10.5 ft, Major 11.5 ft
MHHW Categories - Minor 4.5 ft, Moderate 6.0 ft, Major 7.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/07 PM 5.4/ 5.9 0.9/ 1.4 0.7/ 1.1 2 None
06/08 AM 4.2/ 4.7 -0.2/ 0.2 0.8/ 1.3 3 None
06/08 PM 5.5/ 6.0 1.0/ 1.5 0.8/ 1.3 2-3 None
07/10 AM 4.2/ 4.7 -0.2/ 0.2 0.7/ 1.1 2 None
07/09 PM 5.1/ 5.6 0.6/ 1.1 0.4/ 0.9 2 None
08/10 AM 3.9/ 4.4 -0.7/-0.2 0.2/ 0.7 2 None
Hyannis Harbor
MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.5 ft
MHHW Categories - Minor 1.2 ft, Moderate 2.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/07 PM 4.7/ 5.2 1.0/ 1.5 0.7/ 1.1 1-2 Minor
06/08 AM 3.7/ 4.2 -0.2/ 0.3 0.8/ 1.3 2 None
06/08 PM 5.0/ 5.5 1.2/ 1.7 0.8/ 1.3 1 Minor
07/10 AM 3.7/ 4.2 -0.2/ 0.3 0.7/ 1.1 1 None
07/09 PM 4.6/ 5.1 0.8/ 1.3 0.4/ 0.9 1 None
08/10 AM 3.4/ 3.9 -0.5/ 0.0 0.2/ 0.7 1 None
Provincetown Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.9 ft, Moderate 3.9 ft, Major 4.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/06 PM 10.7/11.2 0.6/ 1.1 0.7/ 1.1 2 None
06/07 AM 9.3/ 9.8 -0.9/-0.4 0.8/ 1.3 3 None
06/08 PM 10.8/11.3 0.7/ 1.1 0.7/ 1.1 3 None
07/08 AM 9.3/ 9.8 -0.9/-0.4 0.7/ 1.1 2 None
07/09 PM 10.5/11.0 0.4/ 0.9 0.2/ 0.8 2 None
08/09 AM 9.2/ 9.7 -1.0/-0.5 0.2/ 0.8 2 None
Dennis - Sesuit Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/07 PM 11.2/11.7 0.7/ 1.1 0.7/ 1.1 2 None
06/07 AM 9.9/10.4 -0.7/-0.2 0.9/ 1.4 2 None
06/08 PM 11.3/11.8 0.8/ 1.3 0.7/ 1.1 2 None
07/08 AM 9.9/10.4 -0.7/-0.2 0.8/ 1.3 2 None
07/09 PM 11.2/11.7 0.7/ 1.1 0.2/ 0.8 1 None
08/09 AM 9.9/10.4 -0.7/-0.2 0.4/ 0.9 1 None
Sandwich Harbor
MLLW Categories - Minor 12.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 1.7 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/06 PM 9.6/10.1 -0.8/-0.2 0.8/ 1.3 1-2 None
06/07 AM 8.4/ 8.9 -2.0/-1.5 1.0/ 1.5 2 None
06/08 PM 9.7/10.2 -0.7/-0.2 0.8/ 1.3 1-2 None
07/08 AM 8.3/ 8.8 -2.0/-1.6 0.8/ 1.3 1 None
07/09 PM 9.4/ 9.9 -1.0/-0.5 0.2/ 0.8 1 None
08/09 AM 8.3/ 8.8 -2.0/-1.6 0.4/ 0.9 1 None
Wings Neck
MLLW Categories - Minor 6.5 ft, Moderate 9.0 ft, Major 11.5 ft
MHHW Categories - Minor 2.1 ft, Moderate 4.6 ft, Major 7.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/04 PM 5.0/ 5.5 0.6/ 1.1 0.7/ 1.1 2 None
06/04 AM 4.2/ 4.7 -0.2/ 0.3 0.8/ 1.3 1 None
06/05 PM 5.2/ 5.7 0.8/ 1.3 0.9/ 1.4 1 None
07/05 AM 4.2/ 4.7 -0.2/ 0.2 0.6/ 1.1 1 None
07/06 PM 5.2/ 5.7 0.8/ 1.3 0.8/ 1.3 1 None
08/07 AM 4.0/ 4.5 -0.5/ 0.0 0.1/ 0.6 1 None
Edgartown
MLLW Categories - Minor 4.0 ft, Moderate 5.0 ft, Major 7.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 2.3 ft, Major 4.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/07 PM 3.6/ 4.1 0.9/ 1.4 0.8/ 1.3 2 None
06/08 AM 2.6/ 3.1 -0.2/ 0.3 0.8/ 1.3 2 None
06/08 PM 3.6/ 4.1 0.9/ 1.4 0.8/ 1.3 1-2 None
07/09 AM 2.6/ 3.1 -0.2/ 0.3 0.6/ 1.1 1-2 None
07/09 PM 3.2/ 3.7 0.6/ 1.1 0.4/ 0.9 1 None
08/10 AM 2.2/ 2.7 -0.5/ 0.0 0.2/ 0.7 1 None
Vineyard Haven
MLLW Categories - Minor 4.5 ft, Moderate 6.0 ft, Major 7.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/07 PM 2.7/ 3.2 0.7/ 1.1 0.8/ 1.3 1-2 None
06/08 AM 2.2/ 2.7 0.2/ 0.8 0.8/ 1.3 1-2 None
06/07 PM 2.7/ 3.2 0.8/ 1.3 0.8/ 1.3 1 None
07/08 AM 2.2/ 2.7 0.2/ 0.7 0.6/ 1.1 1 None
07/08 PM 2.3/ 2.8 0.4/ 0.9 0.5/ 1.0 1 None
08/09 AM 1.9/ 2.3 -0.2/ 0.3 0.2/ 0.7 1 None
Nantucket Harbor
MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.0 ft
MHHW Categories - Minor 1.4 ft, Moderate 2.9 ft, Major 4.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
05/08 PM 4.7/ 5.2 1.2/ 1.7 0.8/ 1.3 2-3 Minor
06/08 AM 3.6/ 4.1 0.0/ 0.5 0.8/ 1.3 3 None
06/08 PM 4.7/ 5.2 1.1/ 1.6 0.8/ 1.3 2-3 None
07/09 AM 3.6/ 4.1 0.0/ 0.5 0.7/ 1.1 2-3 None
07/10 PM 4.2/ 4.7 0.7/ 1.1 0.2/ 0.8 2 None
08/10 AM 3.2/ 3.7 -0.5/ 0.0 0.2/ 0.7 2 None
&&
$$
MAZ007-014>016-019-061200-
/O.CON.KBOX.RP.S.0012.260906T0600Z-260907T0000Z/
Eastern Essex MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Eastern Plymouth MA-
146 PM EDT Sat Sep 5 2026
...HIGH RIP CURRENT RISK REMAINS IN EFFECT FROM LATE TONIGHT
THROUGH SUNDAY EVENING...
* WHAT...Dangerous rip currents expected.
* WHERE...Eastern Essex MA, Southeast Middlesex MA, Suffolk MA,
Eastern Norfolk MA and Eastern Plymouth MA Counties.
* WHEN...From late tonight through Sunday evening.
* IMPACTS...Rip currents can sweep even the best swimmers away
from shore into deeper water.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Swim near a lifeguard. If caught in a rip current, relax and
float. Don`t swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.
&&
$$