Coastal Flood Statement
Coastal Hazard Message
National Weather Service Boston/Norton MA
221 AM EDT Fri Aug 22 2025
MAZ007-019-222000-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/
Eastern Essex MA-Eastern Plymouth MA-
221 AM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT THROUGH LATE
TONIGHT...
* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches.
Some splashover on vulnerable coastal roads around high tide
tonight through Friday night.
* WHERE...Eastern Essex MA and Eastern Plymouth MA Counties.
* WHEN...For the High Surf Advisory, until 8 PM EDT Saturday.
For the Coastal Flood Statement, through late tonight.
* IMPACTS...Roads remain passable. Shallow pockets of flooding
less than one foot deep affect more vulnerable coastal roads
along the North Shore from Salem and Gloucester to
Newburyport. Rough surf will likely cause some splashover onto
coastal roads around the time of high tide. Dangerous swimming
and surfing conditions and localized beach erosion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
&&
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
-------- --------- --------- --------- ------- --------
22/12 PM 10.1/10.6 0.5/ 1.0 1.4/ 1.9 7 None
23/12 AM 11.4/11.9 1.8/ 2.2 1.3/ 1.8 7 Minor
23/12 PM 9.9/10.4 0.2/ 0.8 0.9/ 1.4 6 None
24/12 AM 10.4/10.9 0.8/ 1.3 0.5/ 1.0 5-6 None
24/01 PM 9.7/10.2 0.1/ 0.6 0.6/ 1.1 4 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
-------- --------- --------- --------- ------- --------
22/12 PM 9.2/ 9.7 -0.3/ 0.2 1.4/ 1.9 4-5 None
23/12 AM 10.3/10.8 0.8/ 1.3 1.3/ 1.8 5 None
23/12 PM 8.9/ 9.4 -0.7/-0.2 0.9/ 1.4 4 None
24/12 AM 9.2/ 9.7 -0.3/ 0.2 0.5/ 1.0 4 None
24/01 PM 8.8/ 9.3 -0.8/-0.2 0.6/ 1.1 3 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
-------- --------- --------- --------- ------- --------
22/12 PM 10.3/10.8 0.6/ 1.1 1.5/ 2.0 6 None
23/12 AM 11.4/11.9 1.7/ 2.2 1.3/ 1.8 5 Minor
23/12 PM 9.9/10.4 0.2/ 0.7 0.8/ 1.3 5 None
24/12 AM 10.5/11.0 0.8/ 1.3 0.6/ 1.1 4 None
24/01 PM 10.1/10.6 0.4/ 0.9 0.9/ 1.4 4 None
&&
$$
Coastal Hazard Message
National Weather Service Boston/Norton MA
221 AM EDT Fri Aug 22 2025
MAZ015-016-222000-
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/
Suffolk MA-Eastern Norfolk MA-
221 AM EDT Fri Aug 22 2025
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT THROUGH LATE
TONIGHT...
* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches.
Some splashover on vulnerable coastal roads around high tide
tonight through Friday night.
* WHERE...Suffolk MA and Eastern Norfolk MA Counties.
* WHEN...Through late tonight.
* IMPACTS...Some water on low lying roads and property.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
&&
Time of high total tides are approximate to the nearest hour.
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
22/11 AM 10.7/11.2 0.4/ 0.9 1.3/ 1.8 2 None
22/11 PM 11.9/12.4 1.6/ 2.0 1.4/ 1.9 1 None
23/12 PM 10.6/11.1 0.2/ 0.8 0.9/ 1.4 1-2 None
24/12 AM 11.1/11.6 0.8/ 1.3 0.6/ 1.1 2 None
24/01 PM 10.5/11.0 0.2/ 0.7 0.7/ 1.1 2 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
22/12 PM 10.6/11.1 0.7/ 1.1 1.5/ 2.0 2 None
22/11 PM 11.6/12.1 1.7/ 2.2 1.4/ 1.9 1 None
23/12 PM 10.3/10.8 0.4/ 0.9 0.8/ 1.3 1-2 None
24/12 AM 10.6/11.1 0.7/ 1.1 0.4/ 0.9 2 None
24/01 PM 10.3/10.8 0.4/ 0.9 0.7/ 1.1 2 None
&&
$$
Coastal Hazard Message
National Weather Service Boston/Norton MA
221 AM EDT Fri Aug 22 2025
MAZ022-222000-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/
Barnstable MA-
221 AM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT THROUGH LATE
TONIGHT...
* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches.
Some splashover on vulnerable coastal roads around high tide
tonight through Friday night.
* WHERE...Cape Cod.
* WHEN...For the High Surf Advisory, until 8 PM EDT Saturday.
For the Coastal Flood Statement, through late tonight.
* IMPACTS...Some water on low lying roads and property.
Dangerous swimming and surfing conditions and localized beach
erosion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
&&
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
-------- --------- --------- --------- ------- --------
22/08 AM 3.5/ 4.0 1.5/ 2.0 1.5/ 2.0 5-6 None
22/08 PM 4.0/ 4.5 2.0/ 2.5 1.5/ 2.0 2-3 None
23/08 AM 3.0/ 3.5 1.0/ 1.5 1.0/ 1.5 2 None
23/09 PM 2.8/ 3.4 0.9/ 1.4 0.5/ 1.0 2 None
24/09 AM 2.6/ 3.1 0.6/ 1.1 0.4/ 0.9 2 None
24/10 PM 2.7/ 3.2 0.7/ 1.1 0.4/ 0.9 2 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
-------- --------- --------- --------- ------- --------
22/11 AM 5.5/ 6.0 0.2/ 0.8 1.5/ 2.0 9 None
22/11 PM 6.2/ 6.8 1.1/ 1.6 1.3/ 1.8 6-7 None
23/01 PM 5.7/ 6.2 0.5/ 1.0 0.7/ 1.1 5-6 None
24/12 AM 5.5/ 6.0 0.2/ 0.8 0.5/ 1.0 4 None
24/01 PM 5.5/ 6.0 0.2/ 0.8 0.5/ 1.0 3-4 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
-------- --------- --------- --------- ------- --------
22/01 PM 5.2/ 5.7 0.7/ 1.1 1.4/ 1.9 7 None
23/01 AM 6.0/ 6.5 1.5/ 2.0 1.3/ 1.8 5-6 None
23/01 PM 4.7/ 5.2 0.2/ 0.7 0.9/ 1.4 4-5 None
24/01 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.8 3-4 None
24/02 PM 4.7/ 5.2 0.2/ 0.7 0.8/ 1.3 3 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
-------- --------- --------- --------- ------- --------
22/11 AM 10.4/10.9 0.2/ 0.8 1.4/ 1.9 7 None
23/12 AM 11.7/12.2 1.6/ 2.0 1.3/ 1.8 5-6 None
23/12 PM 10.2/10.7 0.1/ 0.6 0.8/ 1.3 4 None
24/12 AM 10.9/11.4 0.8/ 1.3 0.6/ 1.1 4 None
24/01 PM 10.3/10.8 0.2/ 0.7 0.7/ 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
-------- --------- --------- --------- ------- --------
22/11 AM 11.3/11.8 0.8/ 1.3 1.6/ 2.0 5 None
23/12 AM 12.2/12.7 1.7/ 2.2 1.3/ 1.8 3 None
23/12 PM 10.8/11.3 0.2/ 0.8 0.9/ 1.4 3 None
24/12 AM 11.4/11.9 0.9/ 1.4 0.7/ 1.1 2 None
24/01 PM 11.3/11.8 0.8/ 1.3 1.2/ 1.7 2-3 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
-------- --------- --------- --------- ------- --------
22/11 AM 9.7/10.2 -0.7/-0.2 1.6/ 2.0 3-4 None
22/11 PM 10.6/11.1 0.2/ 0.8 1.4/ 1.9 2 None
23/12 PM 9.1/ 9.6 -1.3/-0.8 0.8/ 1.3 1-2 None
24/12 AM 9.7/10.2 -0.7/-0.2 0.6/ 1.1 2 None
24/01 PM 9.7/10.2 -0.7/-0.2 1.2/ 1.7 2-3 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.5/ 6.0 1.1/ 1.6 1.4/ 1.9 3 None
22/08 PM 6.0/ 6.5 1.6/ 2.0 1.6/ 2.0 2 None
23/09 AM 5.2/ 5.7 0.9/ 1.4 1.1/ 1.6 1 None
23/09 PM 5.1/ 5.6 0.7/ 1.1 0.7/ 1.1 2 None
24/10 AM 4.7/ 5.2 0.2/ 0.8 0.4/ 0.9 2-3 None
24/10 PM 4.7/ 5.2 0.2/ 0.8 0.4/ 0.9 2 None
&&
$$
