Coastal Flood Warnings/Watches/Statements
Issued by NWS Boston, MA
Issued by NWS Boston, MA
892
WHUS41 KBOX 220621
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
221 AM EDT Fri Aug 22 2025
MAZ023-024-222000-
/O.EXP.KBOX.CF.Y.0005.000000T0000Z-250822T0600Z/
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
/O.CON.KBOX.CF.Y.0004.250823T0200Z-250823T0600Z/
Dukes MA-Nantucket MA-
221 AM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 2 AM EDT SATURDAY...
...COASTAL FLOOD ADVISORY HAS EXPIRED...
* WHAT...For the High Surf Advisory, large breaking waves of 5
to 19 feet in the surf zone. 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 (3.6
to 5.3 feet Mean Lower Low Water).
* WHERE...Dukes and Nantucket MA Counties.
* WHEN...For the High Surf Advisory, until 8 PM EDT Saturday.
For the Coastal Flood Advisory, from 10 PM this evening to 2
AM EDT Saturday.
* 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. Dangerous
swimming and surfing conditions and localized beach erosion.
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.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
&&
Time of high total tides are approximate to the nearest hour.
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
-------- --------- --------- --------- ------- --------
22/12 PM 3.7/ 4.2 1.1/ 1.6 1.7/ 2.2 5-6 Minor
23/12 AM 4.0/ 4.5 1.3/ 1.8 1.3/ 1.8 3 Minor
23/01 PM 2.8/ 3.4 0.2/ 0.7 0.8/ 1.3 3 None
24/01 AM 3.1/ 3.6 0.4/ 0.9 0.5/ 1.0 3 None
24/01 PM 2.5/ 3.0 -0.2/ 0.2 0.4/ 0.9 2-3 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
-------- --------- --------- --------- ------- --------
22/12 PM 3.5/ 4.0 1.5/ 2.0 1.7/ 2.2 4-5 None
23/12 AM 3.4/ 3.9 1.4/ 1.9 1.3/ 1.8 2 None
23/12 PM 2.7/ 3.2 0.7/ 1.1 0.9/ 1.4 2 None
23/11 PM 2.5/ 3.0 0.5/ 1.0 0.8/ 1.3 2 None
24/01 PM 2.3/ 2.8 0.4/ 0.9 0.5/ 1.0 2 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
-------- --------- --------- --------- ------- --------
22/12 PM 4.6/ 5.1 1.0/ 1.5 1.6/ 2.0 8-9 None
23/12 AM 5.1/ 5.6 1.5/ 2.0 1.3/ 1.8 5-6 Minor
23/01 PM 3.9/ 4.4 0.2/ 0.8 0.8/ 1.3 5 None
24/02 AM 4.2/ 4.7 0.6/ 1.1 0.5/ 1.0 4 None
24/02 PM 3.6/ 4.1 0.0/ 0.5 0.4/ 0.9 3-4 None
&&
$$
MAZ020-RIZ006-007-222000-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
/O.CON.KBOX.CF.Y.0006.250822T1000Z-250822T1400Z/
/O.CON.KBOX.CF.Y.0004.250822T2200Z-250823T0200Z/
Southern Bristol MA-Washington RI-Newport RI-
221 AM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 6 AM TO 10 AM
EDT THIS MORNING...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 6 PM TO 10 PM
EDT THIS EVENING...
* WHAT...Large breaking waves of 10 to 15 feet. Flooding of up
to one foot deep on vulnerable coastal roads and some debris
on roadways around high tide Friday morning and Friday evening.
* WHERE...In Massachusetts, Southern Bristol County. In Rhode
Island, Washington and Newport Counties.
* WHEN...For the High Surf Advisory, until 8 PM EDT Saturday.
For the first Coastal Flood Advisory, from 6 AM to 10 AM EDT
this morning. For the second Coastal Flood Advisory, from 6 PM
to 10 PM EDT this evening.
* IMPACTS...Minor coastal flooding occurs along the most
vulnerable shoreline locales in Newport, Portsmouth and
Middletown. This includes flooding at parking lots near
beaches in Newport, and a portion of Hazard Road. Minor
coastal flooding also occurs on several streets in the Common
Fence Point area. Dangerous swimming and surfing conditions
and localized beach erosion.
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.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
&&
Time of high total tides are approximate to the nearest hour.
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
-------- --------- --------- --------- ------- --------
22/08 AM 4.2/ 4.7 1.3/ 1.8 1.7/ 2.2 7-8 None
22/09 PM 4.6/ 5.1 1.6/ 2.0 1.5/ 2.0 4 Minor
23/09 AM 3.7/ 4.2 0.7/ 1.1 1.0/ 1.5 3 None
23/10 PM 3.6/ 4.1 0.6/ 1.1 0.6/ 1.1 3 None
24/10 AM 3.7/ 4.2 0.7/ 1.1 0.8/ 1.3 2 None
24/11 PM 3.6/ 4.1 0.6/ 1.1 0.8/ 1.3 2 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.6/ 6.1 1.7/ 2.2 1.6/ 2.0 3 None
22/08 PM 5.9/ 6.4 2.0/ 2.5 1.6/ 2.0 3 Minor
23/08 AM 5.1/ 5.6 1.2/ 1.7 1.1/ 1.6 2 None
23/09 PM 4.9/ 5.4 1.0/ 1.5 0.7/ 1.1 2 None
24/09 AM 4.5/ 5.0 0.6/ 1.1 0.2/ 0.8 2 None
24/10 PM 4.4/ 4.9 0.5/ 1.0 0.4/ 0.9 2 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.2/ 5.7 1.8/ 2.2 1.6/ 2.0 7-9 None
22/08 PM 5.4/ 5.9 1.9/ 2.3 1.5/ 2.0 4-5 None
23/08 AM 4.7/ 5.2 1.3/ 1.8 1.0/ 1.5 3 None
23/09 PM 4.5/ 5.0 1.0/ 1.5 0.6/ 1.1 3 None
24/09 AM 4.0/ 4.5 0.6/ 1.1 0.2/ 0.8 2 None
24/10 PM 4.0/ 4.5 0.6/ 1.1 0.4/ 0.9 2 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.9/ 6.4 1.4/ 1.9 1.6/ 2.0 3 None
22/08 PM 6.7/ 7.2 2.2/ 2.7 1.7/ 2.2 1 Minor
23/09 AM 5.4/ 5.9 0.9/ 1.4 1.1/ 1.6 1 None
23/09 PM 5.7/ 6.2 1.2/ 1.7 0.8/ 1.3 1-2 None
24/09 AM 4.7/ 5.2 0.2/ 0.7 0.4/ 0.9 1-2 None
24/09 PM 5.1/ 5.6 0.6/ 1.1 0.5/ 1.0 1-2 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
-------- --------- --------- --------- ------- --------
22/08 AM 6.4/ 6.9 1.7/ 2.2 1.5/ 2.0 3 None
22/08 PM 6.9/ 7.4 2.2/ 2.7 1.7/ 2.2 1 Minor
23/09 AM 6.2/ 6.7 1.5/ 2.0 1.1/ 1.6 1 None
23/09 PM 6.1/ 6.6 1.4/ 1.9 0.9/ 1.4 1-2 None
24/10 AM 5.4/ 5.9 0.7/ 1.1 0.4/ 0.9 1-2 None
24/10 PM 5.5/ 6.0 0.8/ 1.3 0.5/ 1.0 1-2 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.5/ 6.0 1.6/ 2.0 1.5/ 2.0 3-4 None
22/08 PM 5.9/ 6.4 2.0/ 2.5 1.6/ 2.0 1-2 Minor
23/08 AM 5.1/ 5.6 1.2/ 1.7 1.1/ 1.6 1 None
23/09 PM 4.7/ 5.2 0.9/ 1.4 0.6/ 1.1 2 None
24/09 AM 4.4/ 4.9 0.5/ 1.0 0.2/ 0.8 1-2 None
24/10 PM 4.4/ 4.9 0.5/ 1.0 0.4/ 0.9 2 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.1/ 5.6 1.6/ 2.0 1.5/ 2.0 6-8 None
22/08 PM 5.2/ 5.7 1.8/ 2.2 1.5/ 2.0 3-4 None
23/09 AM 4.7/ 5.2 1.2/ 1.7 1.0/ 1.5 2 None
23/09 PM 4.4/ 4.9 0.9/ 1.4 0.6/ 1.1 2 None
24/09 AM 4.0/ 4.5 0.6/ 1.1 0.2/ 0.8 2 None
24/10 PM 4.0/ 4.5 0.5/ 1.0 0.4/ 0.9 2 None
&&
$$
RIZ008-222000-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
/O.CON.KBOX.CF.Y.0006.250822T1000Z-250822T1400Z/
/O.CON.KBOX.CF.Y.0004.250822T2200Z-250823T0200Z/
Block Island RI-
221 AM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 6 AM TO 10 AM
EDT THIS MORNING...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 6 PM TO 10 PM
EDT THIS EVENING...
* WHAT...Large breaking waves of 10 to 15 feet. Flooding of up
to one foot deep on vulnerable coastal roads and some debris
on roadways around high tide Friday morning and Friday evening.
* WHERE...Block Island RI.
* WHEN...For the High Surf Advisory, until 8 PM EDT Saturday.
For the first Coastal Flood Advisory, from 6 AM to 10 AM EDT
this morning. For the second Coastal Flood Advisory, from 6 PM
to 10 PM EDT this evening.
* IMPACTS...Flooding of lots, parks, and roads with only
isolated road closures expected. Dangerous swimming and
surfing conditions and localized beach erosion.
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.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
&&
Time of high total tides are approximate to the nearest hour.
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
-------- --------- --------- --------- ------- --------
22/07 AM 4.7/ 5.2 1.6/ 2.0 1.6/ 2.0 12-14 None
22/08 PM 5.1/ 5.6 1.9/ 2.3 1.5/ 2.0 7 Minor
23/08 AM 4.2/ 4.7 1.1/ 1.6 0.9/ 1.4 5 None
23/09 PM 4.0/ 4.5 0.9/ 1.4 0.6/ 1.1 4 None
24/09 AM 3.7/ 4.2 0.5/ 1.0 0.2/ 0.8 4 None
24/09 PM 3.6/ 4.1 0.4/ 0.9 0.2/ 0.8 3-4 None
&&
$$
RIZ002-004-005-222000-
/O.CON.KBOX.CF.Y.0006.250822T1000Z-250822T1400Z/
/O.CON.KBOX.CF.Y.0004.250822T2200Z-250823T0200Z/
Southeast Providence RI-Eastern Kent RI-Bristol RI-
221 AM EDT Fri Aug 22 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 6 AM TO 10 AM
EDT THIS MORNING...
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 6 PM TO 10 PM
EDT THIS EVENING...
* WHAT...Flooding of up to one foot deep on vulnerable coastal
roads around high tide Friday morning and Friday evening.
* WHERE...Southeast Providence RI, Eastern Kent RI and Bristol
RI Counties.
* WHEN...For the first Coastal Flood Advisory, from 6 AM to 10
AM EDT this morning. For the second Coastal Flood Advisory,
from 6 PM to 10 PM EDT this evening.
* IMPACTS...Flooding of lots, parks, and roads with only
isolated road closures expected.
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.
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
-------- --------- --------- --------- ------- --------
22/09 AM 5.6/ 6.1 0.8/ 1.3 1.6/ 2.0 2 None
22/08 PM 6.8/ 7.3 2.0/ 2.5 1.8/ 2.2 1 Minor
23/08 AM 5.2/ 5.7 0.4/ 0.9 1.2/ 1.7 1 None
23/09 PM 5.7/ 6.2 1.0/ 1.5 0.9/ 1.4 1-2 None
24/11 AM 4.7/ 5.2 -0.2/ 0.3 0.7/ 1.1 1-3 None
24/09 PM 4.6/ 5.1 -0.2/ 0.2 0.6/ 1.1 1-2 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
-------- --------- --------- --------- ------- --------
22/08 AM 6.4/ 6.9 1.8/ 2.2 1.6/ 2.0 2-3 None
22/08 PM 6.8/ 7.3 2.2/ 2.7 1.8/ 2.2 1 Minor
23/09 AM 6.0/ 6.5 1.4/ 1.9 1.1/ 1.6 1 None
23/09 PM 5.6/ 6.1 1.0/ 1.5 0.8/ 1.3 1-2 None
24/10 AM 5.2/ 5.7 0.7/ 1.1 0.5/ 1.0 1-3 None
24/10 PM 5.2/ 5.7 0.7/ 1.1 0.5/ 1.0 1-2 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.9/ 6.4 1.4/ 1.9 1.6/ 2.0 3 None
22/08 PM 6.7/ 7.2 2.2/ 2.7 1.7/ 2.2 1 Minor
23/09 AM 5.4/ 5.9 0.9/ 1.4 1.1/ 1.6 1 None
23/09 PM 5.7/ 6.2 1.2/ 1.7 0.8/ 1.3 1-2 None
24/09 AM 4.7/ 5.2 0.2/ 0.7 0.4/ 0.9 1-2 None
24/09 PM 5.1/ 5.6 0.6/ 1.1 0.5/ 1.0 1-2 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
-------- --------- --------- --------- ------- --------
22/08 AM 5.9/ 6.4 1.8/ 2.2 1.6/ 2.0 2-3 Minor
22/08 PM 6.2/ 6.7 2.1/ 2.6 1.7/ 2.2 1 Minor
23/09 AM 5.5/ 6.0 1.4/ 1.9 1.1/ 1.6 1 None
23/09 PM 5.2/ 5.7 1.1/ 1.6 0.7/ 1.1 1-2 None
24/09 AM 4.7/ 5.2 0.7/ 1.1 0.4/ 0.9 1-2 None
24/10 PM 4.7/ 5.2 0.6/ 1.1 0.4/ 0.9 1-2 None
&&
$$
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
&&
$$
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
&&
$$
MAZ021-222000-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
Southern Plymouth MA-
221 AM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
* WHAT...Large breaking waves of up to 4 feet in the surf zone.
* WHERE...Southern Plymouth MA County.
* WHEN...Until 8 PM EDT Saturday.
* IMPACTS...Dangerous swimming and surfing conditions and
localized beach erosion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
$$
MAZ015-016-222000-
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/
Suffolk MA-Eastern Norfolk MA-
221 AM EDT Fri Aug 22 2025
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT THROUGH LATE
TONIGHT...
* WHAT...Large breaking waves of 10 to 15 feet on ocean beaches.
Some splashover on vulnerable coastal roads around high tide
tonight through Friday night.
* WHERE...Suffolk MA and Eastern Norfolk MA Counties.
* WHEN...Through late tonight.
* IMPACTS...Some water on low lying roads and property.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
&&
Time of high total tides are approximate to the nearest hour.
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
22/11 AM 10.7/11.2 0.4/ 0.9 1.3/ 1.8 2 None
22/11 PM 11.9/12.4 1.6/ 2.0 1.4/ 1.9 1 None
23/12 PM 10.6/11.1 0.2/ 0.8 0.9/ 1.4 1-2 None
24/12 AM 11.1/11.6 0.8/ 1.3 0.6/ 1.1 2 None
24/01 PM 10.5/11.0 0.2/ 0.7 0.7/ 1.1 2 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
22/12 PM 10.6/11.1 0.7/ 1.1 1.5/ 2.0 2 None
22/11 PM 11.6/12.1 1.7/ 2.2 1.4/ 1.9 1 None
23/12 PM 10.3/10.8 0.4/ 0.9 0.8/ 1.3 1-2 None
24/12 AM 10.6/11.1 0.7/ 1.1 0.4/ 0.9 2 None
24/01 PM 10.3/10.8 0.4/ 0.9 0.7/ 1.1 2 None
&&
$$