BOX continues High Surf Advisory for Barnstable [MA] till Aug 23, 8:00 PM EDT124
WHUS41 KBOX 230210
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
1010 PM EDT Fri Aug 22 2025
MAZ020-RIZ006-007-231515-
/O.EXP.KBOX.CF.Y.0004.000000T0000Z-250823T0200Z/
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
Southern Bristol MA-Washington RI-Newport RI-
1010 PM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD ADVISORY HAS EXPIRED...
* WHAT...Large breaking waves of 4 to 8 feet in the surf zone.
* WHERE...In Massachusetts, Southern Bristol MA County. In Rhode
Island, Washington RI and Newport RI Counties.
* 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.
&&
$$
RIZ008-231515-
/O.EXP.KBOX.CF.Y.0004.000000T0000Z-250823T0200Z/
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
Block Island RI-
1010 PM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD ADVISORY HAS EXPIRED...
* WHAT...Large breaking waves of 5 to 8 feet in the surf zone.
* WHERE...Block Island RI.
* WHEN...Until 8 PM EDT Saturday.
* IMPACTS...Dangerous swimming and surfing conditions and
localized beach erosion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
$$
RIZ002-004-005-230315-
/O.EXP.KBOX.CF.Y.0004.000000T0000Z-250823T0200Z/
Southeast Providence RI-Eastern Kent RI-Bristol RI-
1010 PM EDT Fri Aug 22 2025
...COASTAL FLOOD ADVISORY HAS EXPIRED...
Water levels have fallen below flood stage and are expected
to remain below flood levels.
$$
MAZ023-024-231515-
/O.CON.KBOX.CF.Y.0004.000000T0000Z-250823T0600Z/
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
Dukes MA-Nantucket MA-
1010 PM EDT Fri Aug 22 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT
SATURDAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
* WHAT...For the High Surf Advisory, large breaking waves of 5
to 12 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 Coastal Flood Advisory, until 2 AM EDT
Saturday. For the High Surf Advisory, until 8 PM 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
-------- --------- --------- --------- ------- --------
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
25/01 AM 2.7/ 3.2 0.1/ 0.6 0.5/ 1.0 2 None
25/02 PM 2.6/ 3.1 -0.2/ 0.3 0.4/ 0.9 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
-------- --------- --------- --------- ------- --------
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
25/01 AM 2.3/ 2.8 0.4/ 0.9 0.5/ 1.0 2 None
25/01 PM 2.3/ 2.8 0.4/ 0.9 0.6/ 1.1 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
-------- --------- --------- --------- ------- --------
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
25/02 AM 3.9/ 4.4 0.2/ 0.8 0.4/ 0.9 3 None
25/02 PM 3.7/ 4.2 0.1/ 0.6 0.4/ 0.9 3 None
&&
$$
MAZ022-231515-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/
Barnstable MA-
1010 PM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL 2 AM EDT
SATURDAY...
* WHAT...For the High Surf Advisory, large breaking waves of 6
to 13 feet in the surf zone. For the Coastal Flood Statement,
up to one half foot of inundation above ground level in low-
lying areas near shorelines and tidal waterways (4.2 to 12.2
feet Mean Lower Low Water).
* WHERE...Cape Cod.
* WHEN...For the High Surf Advisory, until 8 PM EDT Saturday.
For the Coastal Flood Statement, until 2 AM EDT Saturday.
* 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
-------- --------- --------- --------- ------- --------
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
25/10 AM 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 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 4 None
25/01 AM 5.5/ 6.0 0.2/ 0.8 0.5/ 1.0 3 None
25/02 PM 5.4/ 5.9 0.2/ 0.7 0.4/ 0.9 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
-------- --------- --------- --------- ------- --------
23/01 AM 6.0/ 6.5 1.5/ 2.0 1.3/ 1.8 5 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
25/02 AM 5.1/ 5.6 0.6/ 1.1 0.8/ 1.3 3 None
25/02 PM 4.2/ 4.7 -0.2/ 0.2 0.4/ 0.9 2 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
-------- --------- --------- --------- ------- --------
23/12 AM 11.7/12.2 1.6/ 2.0 1.3/ 1.8 5 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
25/01 AM 10.9/11.4 0.8/ 1.3 0.7/ 1.1 2-3 None
25/01 PM 10.1/10.6 0.0/ 0.5 0.7/ 1.1 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
-------- --------- --------- --------- ------- --------
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
25/01 AM 11.8/12.3 1.3/ 1.8 1.2/ 1.7 2 None
25/01 PM 10.7/11.2 0.2/ 0.7 0.8/ 1.3 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
-------- --------- --------- --------- ------- --------
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 1-3 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
25/01 AM 10.2/10.7 -0.2/ 0.3 1.2/ 1.7 2 None
25/01 PM 9.2/ 9.7 -1.1/-0.7 0.8/ 1.3 2 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
-------- --------- --------- --------- ------- --------
22/09 PM 6.0/ 6.5 1.6/ 2.0 1.6/ 2.0 1 Minor
23/09 AM 5.2/ 5.7 0.9/ 1.4 1.1/ 1.6 1-2 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
25/10 AM 4.7/ 5.2 0.2/ 0.8 0.5/ 1.0 2 None
&&
$$
MAZ007-019-231515-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/
Eastern Essex MA-Eastern Plymouth MA-
1010 PM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL 2 AM EDT
SATURDAY...
* WHAT...For the High Surf Advisory, large breaking waves of 5
to 10 feet in the surf zone. For the Coastal Flood Statement,
up to one half foot of inundation above ground level in low-
lying areas near shorelines and tidal waterways (10.5 to 11.6
feet Mean Lower Low Water).
* WHERE...Eastern Essex and Eastern Plymouth MA Counties.
* WHEN...For the High Surf Advisory, until 8 PM EDT Saturday.
For the Coastal Flood Statement, until 2 AM EDT Saturday.
* 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
-------- --------- --------- --------- ------- --------
23/12 AM 11.4/11.9 1.8/ 2.2 1.3/ 1.8 6-7 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
25/01 AM 10.3/10.8 0.7/ 1.1 0.6/ 1.1 3-4 None
25/01 PM 9.5/10.0 -0.2/ 0.3 0.5/ 1.0 2 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
-------- --------- --------- --------- ------- --------
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
25/01 AM 9.3/ 9.8 -0.2/ 0.2 0.6/ 1.1 2-3 None
25/02 PM 8.6/ 9.1 -1.0/-0.5 0.4/ 0.9 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
-------- --------- --------- --------- ------- --------
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 3-4 None
25/01 AM 10.6/11.1 0.9/ 1.4 0.9/ 1.4 3 None
25/01 PM 9.6/10.1 -0.2/ 0.3 0.6/ 1.1 2 None
&&
$$
MAZ021-231515-
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/
Southern Plymouth MA-
1010 PM EDT Fri Aug 22 2025
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY...
* WHAT...Large breaking waves of up to 3 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.
&&
$$
MAZ015-016-230600-
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/
Suffolk MA-Eastern Norfolk MA-
1010 PM EDT Fri Aug 22 2025
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL 2 AM EDT
SATURDAY...
* WHAT... Up to one half foot of inundation above ground level
in low-lying areas near shorelines and tidal waterways (11.8
to 12.1 feet Mean Lower Low Water).
* WHERE...Suffolk MA and Eastern Norfolk MA Counties.
* WHEN...Until 2 AM EDT Saturday.
* IMPACTS...Some water on low lying roads and property.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
&&
Time of high total tides are approximate to the nearest hour.
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
22/11 PM 11.9/12.4 1.6/ 2.0 1.4/ 1.9 1 None
23/12 PM 10.6/11.1 0.2/ 0.8 0.9/ 1.4 1-2 None
24/12 AM 11.1/11.6 0.8/ 1.3 0.6/ 1.1 2 None
24/01 PM 10.5/11.0 0.2/ 0.7 0.7/ 1.1 2 None
25/01 AM 11.0/11.5 0.7/ 1.1 0.7/ 1.1 1-2 None
25/01 PM 10.3/10.8 0.0/ 0.5 0.6/ 1.1 1-2 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
22/11 PM 11.6/12.1 1.7/ 2.2 1.4/ 1.9 1 None
23/12 PM 10.3/10.8 0.4/ 0.9 0.8/ 1.3 1-2 None
24/12 AM 10.6/11.1 0.7/ 1.1 0.4/ 0.9 2 None
24/01 PM 10.3/10.8 0.4/ 0.9 0.7/ 1.1 2 None
25/01 AM 10.7/11.2 0.8/ 1.3 0.7/ 1.1 1 None
25/01 PM 9.9/10.4 0.0/ 0.5 0.5/ 1.0 1-2 None
&&
$$
Source:
BOX continues High Surf Advisory for Barnstable [MA] till Aug 23, 8:00 PM EDT----------------
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