Coastal Flood Warnings/Watches/Statements
Issued by NWS Boston, MA
Issued by NWS Boston, MA
866
WHUS41 KBOX 281808
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
208 PM EDT Mon Sep 28 2026
MAZ007-015-016-019-022>024-290400-
/O.CON.KBOX.CF.Y.0009.000000T0000Z-260929T0400Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Dukes MA-Nantucket MA-
208 PM EDT Mon Sep 28 2026
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
* WHAT...Up to one half foot of inundation above ground level in
low-lying areas near shorelines and tidal waterways.
* WHERE...Eastern Massachusetts coast, including Cape Cod, Nantucket and
Martha`s Vineyard
* WHEN...Until midnight EDT tonight.
* 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.
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.
&&
&&
Time of high total tides are approximate to the nearest hour.
Gloucester Harbor
MLLW Categories - Minor 11.5 ft, Moderate 13.0 ft, Major 15.0 ft
MHHW Categories - Minor 1.9 ft, Moderate 3.4 ft, Major 5.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/01 AM 10.0/10.5 0.4/ 0.9 0.6/ 1.1 5 None
29/01 PM 10.8/11.3 1.2/ 1.7 0.6/ 1.1 4 None
30/02 AM 9.9/10.4 0.2/ 0.8 0.6/ 1.1 3 None
Merrimack River near Newburyport MA
MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.5 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 4.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/02 AM 9.2/ 9.7 -0.3/ 0.2 0.8/ 1.3 4 None
29/02 PM 9.9/10.4 0.4/ 0.9 0.6/ 1.1 3 None
30/02 AM 8.9/ 9.4 -0.7/-0.2 0.6/ 1.1 2 None
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.2 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
-------- --------- --------- --------- ------- --------
29/01 AM 11.0/11.5 0.7/ 1.1 0.8/ 1.3 1-2 None
29/02 PM 11.6/12.1 1.3/ 1.8 0.6/ 1.1 1 None
30/02 AM 10.6/11.1 0.2/ 0.8 0.6/ 1.1 1 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/01 AM 10.6/11.1 0.7/ 1.1 0.7/ 1.1 1 None
29/02 PM 11.3/11.8 1.4/ 1.9 0.6/ 1.1 1 None
30/02 AM 10.4/10.9 0.5/ 1.0 0.6/ 1.1 1 None
Green Harbor
MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft
MHHW Categories - Minor 1.6 ft, Moderate 3.6 ft, Major 5.6 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/01 AM 10.2/10.7 0.2/ 0.8 0.7/ 1.1 3-4 None
29/02 PM 11.0/11.5 1.1/ 1.6 0.6/ 1.1 3 None
30/02 AM 10.0/10.5 0.1/ 0.6 0.6/ 1.1 2 None
Scituate MA
MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft
MHHW Categories - Minor 1.8 ft, Moderate 3.8 ft, Major 5.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/01 AM 10.2/10.7 0.5/ 1.0 0.8/ 1.3 4-5 None
29/02 PM 10.8/11.3 1.1/ 1.6 0.6/ 1.1 3-4 None
30/02 AM 9.9/10.4 0.2/ 0.7 0.6/ 1.1 3 None
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
-------- --------- --------- --------- ------- --------
28/10 PM 2.6/ 3.1 0.6/ 1.1 0.6/ 1.1 2-3 None
29/11 AM 3.2/ 3.7 1.2/ 1.7 0.5/ 1.0 2 None
29/11 PM 2.5/ 3.0 0.5/ 1.0 0.6/ 1.1 1 None
30/11 AM 3.2/ 3.7 1.2/ 1.7 0.6/ 1.1 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
-------- --------- --------- --------- ------- --------
28/02 PM 6.8/ 7.3 1.6/ 2.0 0.9/ 1.4 4 None
29/02 AM 5.9/ 6.4 0.7/ 1.1 0.6/ 1.1 4 None
29/02 PM 6.6/ 7.1 1.4/ 1.9 0.5/ 1.0 3 None
30/03 AM 5.7/ 6.2 0.5/ 1.0 0.6/ 1.1 3 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
-------- --------- --------- --------- ------- --------
29/02 AM 4.5/ 5.0 0.0/ 0.5 0.6/ 1.1 3 None
29/03 PM 5.2/ 5.7 0.7/ 1.1 0.6/ 1.1 3 None
30/03 AM 4.5/ 5.0 0.0/ 0.5 0.6/ 1.1 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
-------- --------- --------- --------- ------- --------
28/02 PM 4.9/ 5.4 1.1/ 1.6 1.0/ 1.5 2 Minor
29/02 AM 3.9/ 4.4 0.1/ 0.6 0.6/ 1.1 2 None
29/03 PM 4.6/ 5.1 0.8/ 1.3 0.6/ 1.1 2 None
30/03 AM 3.7/ 4.2 0.0/ 0.5 0.6/ 1.1 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
-------- --------- --------- --------- ------- --------
29/01 AM 10.7/11.2 0.6/ 1.1 0.7/ 1.1 4 None
29/02 PM 11.4/11.9 1.3/ 1.8 0.6/ 1.1 3 None
30/02 AM 10.5/11.0 0.4/ 0.9 0.6/ 1.1 3 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
-------- --------- --------- --------- ------- --------
29/01 AM 11.2/11.7 0.7/ 1.1 0.8/ 1.3 2 None
29/02 PM 11.9/12.4 1.4/ 1.9 0.6/ 1.1 2 None
30/02 AM 10.9/11.4 0.4/ 0.9 0.6/ 1.1 2 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
-------- --------- --------- --------- ------- --------
29/01 AM 9.4/ 9.9 -1.0/-0.5 0.8/ 1.3 2 None
29/02 PM 10.0/10.5 -0.3/ 0.2 0.6/ 1.1 2 None
30/02 AM 9.1/ 9.6 -1.3/-0.8 0.6/ 1.1 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
-------- --------- --------- --------- ------- --------
28/10 PM 4.7/ 5.2 0.2/ 0.8 0.6/ 1.1 1-2 None
29/11 AM 5.2/ 5.7 0.9/ 1.4 0.6/ 1.1 1 None
29/11 PM 4.5/ 5.0 0.1/ 0.6 0.6/ 1.1 1 None
30/11 AM 5.2/ 5.7 0.8/ 1.3 0.6/ 1.1 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
-------- --------- --------- --------- ------- --------
28/11 PM 2.5/ 3.0 -0.2/ 0.2 0.8/ 1.3 3 None
29/12 PM 3.1/ 3.6 0.4/ 0.9 0.5/ 1.0 2 None
30/03 AM 2.3/ 2.8 -0.3/ 0.2 0.6/ 1.1 1-2 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
-------- --------- --------- --------- ------- --------
29/01 AM 2.1/ 2.6 0.1/ 0.6 0.6/ 1.1 2 None
29/01 PM 2.5/ 3.0 0.5/ 1.0 0.5/ 1.0 2 None
30/03 AM 2.2/ 2.7 0.2/ 0.7 0.6/ 1.1 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
-------- --------- --------- --------- ------- --------
29/02 AM 3.6/ 4.1 0.0/ 0.5 0.5/ 1.0 4 None
29/03 PM 4.5/ 5.0 0.9/ 1.4 0.6/ 1.1 3 None
30/03 AM 3.7/ 4.2 0.1/ 0.6 0.6/ 1.1 2 None
&&
$$
MAZ020-021-RIZ002-004>008-290400-
/O.CON.KBOX.CF.S.0005.000000T0000Z-260929T0400Z/
Southern Bristol MA-Southern Plymouth MA-Southeast Providence RI-
Eastern Kent RI-Bristol RI-Washington RI-Newport RI-
Block Island RI-
208 PM EDT Mon Sep 28 2026
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
* WHAT...Pockets of up to one half foot of inundation above
ground level in low-lying areas near shorelines and tidal
waterways.
* WHERE...In Rhode Island, areas along Narragansett Bay as well
as south coastal areas. In Massachusetts, south coastal areas
along Buzzards Bay.
* WHEN...Until midnight EDT tonight.
* IMPACTS...Some water on low lying roads and property.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
&&
Time of high total tides are approximate to the nearest hour.
Narragansett Bay at Fox Point
MLLW Categories - Minor 7.0 ft, Moderate 9.0 ft, Major 10.5 ft
MHHW Categories - Minor 2.2 ft, Moderate 4.2 ft, Major 5.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 5.6/ 6.1 0.8/ 1.3 0.7/ 1.1 1 None
29/10 AM 6.0/ 6.5 1.2/ 1.7 0.6/ 1.1 1 None
29/11 PM 5.2/ 5.7 0.5/ 1.0 0.6/ 1.1 1 None
30/11 AM 5.9/ 6.4 1.1/ 1.6 0.6/ 1.1 1 None
Narragansett Bay at Conimicut Point
MLLW Categories - Minor 7.0 ft, Moderate 8.5 ft, Major 10.0 ft
MHHW Categories - Minor 2.4 ft, Moderate 3.9 ft, Major 5.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 5.2/ 5.7 0.7/ 1.1 0.7/ 1.1 1 None
29/10 AM 5.7/ 6.2 1.1/ 1.6 0.6/ 1.1 1 None
29/11 PM 5.1/ 5.6 0.5/ 1.0 0.6/ 1.1 1 None
30/11 AM 5.6/ 6.1 1.0/ 1.5 0.6/ 1.1 1 None
Mount Hope Bay near Bristol Point RI
MLLW Categories - Minor 7.0 ft, Moderate 9.5 ft, Major 12.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 5.0 ft, Major 7.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 5.2/ 5.7 0.7/ 1.1 0.7/ 1.1 1 None
29/10 AM 5.5/ 6.0 1.0/ 1.5 0.6/ 1.1 1 None
29/11 PM 4.7/ 5.2 0.2/ 0.8 0.6/ 1.1 1 None
30/11 AM 5.5/ 6.0 1.0/ 1.5 0.6/ 1.1 1 None
Narragansett Bay at Quonset Point
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.5 ft
MHHW Categories - Minor 1.9 ft, Moderate 3.4 ft, Major 5.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 4.9/ 5.4 0.8/ 1.3 0.7/ 1.1 1 None
29/10 AM 5.2/ 5.7 1.2/ 1.7 0.6/ 1.1 1 None
29/11 PM 4.6/ 5.1 0.5/ 1.0 0.6/ 1.1 1 None
30/11 AM 5.2/ 5.7 1.1/ 1.6 0.6/ 1.1 1 None
Westerly RI at Watch Hill
MLLW Categories - Minor 5.0 ft, Moderate 8.0 ft, Major 9.5 ft
MHHW Categories - Minor 2.0 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
-------- --------- --------- --------- ------- --------
28/11 PM 3.4/ 3.9 0.4/ 0.9 0.7/ 1.1 3 None
29/11 AM 3.9/ 4.4 0.9/ 1.4 0.6/ 1.1 2 None
30/12 AM 3.1/ 3.6 0.1/ 0.6 0.6/ 1.1 1 None
30/12 PM 3.7/ 4.2 0.8/ 1.3 0.6/ 1.1 1 None
Newport Harbor
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.0 ft
MHHW Categories - Minor 2.1 ft, Moderate 3.6 ft, Major 5.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 4.6/ 5.1 0.7/ 1.1 0.7/ 1.1 2-3 None
29/10 AM 5.0/ 5.5 1.1/ 1.6 0.6/ 1.1 2 None
29/11 PM 4.2/ 4.7 0.4/ 0.9 0.6/ 1.1 1 None
30/11 AM 4.9/ 5.4 1.0/ 1.5 0.6/ 1.1 1 None
Newport South Coast Beaches
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.0 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
-------- --------- --------- --------- ------- --------
28/10 PM 4.2/ 4.7 0.7/ 1.1 0.6/ 1.1 3 None
29/10 AM 4.6/ 5.1 1.1/ 1.6 0.5/ 1.0 2 None
29/10 PM 4.0/ 4.5 0.5/ 1.0 0.6/ 1.1 2 None
30/11 AM 4.6/ 5.1 1.1/ 1.6 0.6/ 1.1 1 None
Block Island at Old Harbor
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.0 ft
MHHW Categories - Minor 2.8 ft, Moderate 4.3 ft, Major 5.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/09 PM 3.7/ 4.2 0.6/ 1.1 0.7/ 1.1 5 None
29/10 AM 4.2/ 4.7 1.0/ 1.5 0.4/ 0.9 3 None
29/10 PM 3.6/ 4.1 0.4/ 0.9 0.5/ 1.0 2 None
30/11 AM 4.2/ 4.7 1.0/ 1.5 0.5/ 1.0 2 None
Mount Hope Bay near Fall River MA
MLLW Categories - Minor 7.0 ft, Moderate 9.5 ft, Major 12.0 ft
MHHW Categories - Minor 2.3 ft, Moderate 4.8 ft, Major 7.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 5.5/ 6.0 0.8/ 1.3 0.7/ 1.1 1 None
29/10 AM 5.9/ 6.4 1.2/ 1.7 0.6/ 1.1 1 None
29/11 PM 5.2/ 5.7 0.6/ 1.1 0.6/ 1.1 1 None
30/11 AM 5.7/ 6.2 1.1/ 1.6 0.6/ 1.1 1 None
New Bedford Hurricane Barrier
MLLW Categories - Minor 6.0 ft, Moderate 7.5 ft, Major 9.5 ft
MHHW Categories - Minor 2.1 ft, Moderate 3.6 ft, Major 5.6 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 4.5/ 5.0 0.6/ 1.1 0.6/ 1.1 2 None
29/10 AM 5.1/ 5.6 1.2/ 1.7 0.6/ 1.1 1 None
29/11 PM 4.4/ 4.9 0.5/ 1.0 0.6/ 1.1 1 None
30/11 AM 5.1/ 5.6 1.2/ 1.7 0.6/ 1.1 1 None
Westport
MLLW Categories - Minor 6.0 ft, Moderate 8.0 ft, Major 10.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.5 ft, Major 6.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 4.0/ 4.5 0.6/ 1.1 0.6/ 1.1 3 None
29/10 AM 4.5/ 5.0 1.0/ 1.5 0.5/ 1.0 2 None
29/11 PM 4.0/ 4.5 0.5/ 1.0 0.6/ 1.1 1 None
30/11 AM 4.5/ 5.0 1.0/ 1.5 0.6/ 1.1 1 None
Buzzards Bay at Mattapoisett
MLLW Categories - Minor 8.5 ft, Moderate 10.0 ft, Major 12.0 ft
MHHW Categories - Minor 4.4 ft, Moderate 5.9 ft, Major 7.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
28/10 PM 4.6/ 5.1 0.5/ 1.0 0.6/ 1.1 2 None
29/10 AM 5.1/ 5.6 1.0/ 1.5 0.5/ 1.0 1 None
29/11 PM 4.5/ 5.0 0.4/ 0.9 0.6/ 1.1 1 None
30/11 AM 5.1/ 5.6 1.0/ 1.5 0.6/ 1.1 1 None
&&
$$