Coastal Flood Watch

Locations Affected

Boston, MA ∙ Cambridge, MA ∙ Lynn, MA ∙ Quincy, MA ∙ Weymouth, MA ∙ Revere, MA ∙ Peabody, MA ∙ Salisbury, MA ∙ Assinippi, MA ∙ South Duxbury, MA

Full Alert Message

Coastal Hazard Message National Weather Service Boston/Norton MA 452 PM EST Fri Feb 20 2026 ...COASTAL FLOOD WATCH NOW IN EFFECT FROM LATE SUNDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...One to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways (3.5 to 12.9 feet Mean Lower Low Water). * WHERE...Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA, Dukes MA and Nantucket MA Counties. * WHEN...From early Monday morning through late Tuesday morning. * IMPACTS...Roads may become impassable. 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 -------- --------- --------- --------- ------- -------- 21/01 AM 10.2/10.7 0.6/ 1.1 0.7/ 1.1 3-4 None 21/02 PM 9.9/10.4 0.2/ 0.8 0.7/ 1.1 4 None 22/02 AM 10.2/10.7 0.6/ 1.1 0.4/ 0.9 3 None 22/03 PM 9.3/ 9.8 -0.3/ 0.2 0.5/ 1.0 3 None 23/03 AM 11.2/11.7 1.6/ 2.0 1.4/ 1.9 6-9 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 -------- --------- --------- --------- ------- -------- 21/02 AM 9.4/ 9.9 -0.2/ 0.3 0.7/ 1.1 2-3 None 21/02 PM 9.1/ 9.6 -0.5/ 0.0 0.7/ 1.1 3 None 22/02 AM 9.2/ 9.7 -0.3/ 0.2 0.5/ 1.0 2 None 22/03 PM 8.6/ 9.1 -1.0/-0.5 0.5/ 1.0 2-3 None 23/03 AM 10.2/10.7 0.7/ 1.1 1.4/ 1.9 4-7 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 -------- --------- --------- --------- ------- -------- 21/01 AM 11.0/11.5 0.7/ 1.1 0.8/ 1.3 2 None 21/02 PM 10.8/11.3 0.5/ 1.0 0.8/ 1.3 1 None 22/02 AM 10.9/11.4 0.6/ 1.1 0.5/ 1.0 1 None 22/03 PM 10.1/10.6 -0.2/ 0.2 0.6/ 1.1 2 None 23/03 AM 12.1/12.6 1.8/ 2.2 1.7/ 2.2 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 -------- --------- --------- --------- ------- -------- 21/01 AM 10.9/11.4 1.0/ 1.5 0.7/ 1.1 1-2 None 21/02 PM 10.7/11.2 0.8/ 1.3 0.7/ 1.1 1 None 22/02 AM 10.7/11.2 0.8/ 1.3 0.4/ 0.9 1 None 22/03 PM 9.9/10.4 0.0/ 0.5 0.5/ 1.0 1-2 None 23/03 AM 11.8/12.3 1.9/ 2.3 1.6/ 2.0 2 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 -------- --------- --------- --------- ------- -------- 21/01 AM 10.4/10.9 0.5/ 1.0 0.8/ 1.3 2 None 21/02 PM 10.2/10.7 0.2/ 0.8 0.7/ 1.1 3 None 22/02 AM 10.5/11.0 0.6/ 1.1 0.5/ 1.0 2 None 22/03 PM 9.8/10.3 -0.2/ 0.3 0.6/ 1.1 2-3 None 23/03 AM 11.7/12.2 1.8/ 2.2 1.6/ 2.0 3-6 Minor 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 -------- --------- --------- --------- ------- -------- 21/01 AM 10.6/11.1 0.9/ 1.4 0.8/ 1.3 3 None 21/02 PM 10.4/10.9 0.7/ 1.1 0.8/ 1.3 3-4 None 22/02 AM 10.7/11.2 1.0/ 1.5 0.6/ 1.1 3 None 22/03 PM 9.8/10.3 0.1/ 0.6 0.6/ 1.1 3 None 23/03 AM 11.8/12.3 2.1/ 2.6 1.7/ 2.2 5-7 Minor 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 -------- --------- --------- --------- ------- -------- 20/10 PM 2.7/ 3.2 0.7/ 1.1 0.8/ 1.3 2 None 21/11 AM 2.0/ 2.5 0.0/ 0.5 0.4/ 0.9 2 None 21/11 PM 2.3/ 2.8 0.4/ 0.9 0.4/ 0.9 2 None 22/11 AM 1.7/ 2.2 -0.3/ 0.2 0.4/ 0.9 1-2 None 23/01 AM 3.2/ 3.7 1.3/ 1.8 1.4/ 1.9 3 None 23/12 PM 2.7/ 3.2 0.8/ 1.3 1.6/ 2.0 4-5 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 -------- --------- --------- --------- ------- -------- 21/02 AM 6.2/ 6.8 1.1/ 1.6 0.7/ 1.1 3-4 None 21/02 PM 5.7/ 6.2 0.6/ 1.1 0.7/ 1.1 3-4 None 22/03 AM 6.1/ 6.6 0.9/ 1.4 0.4/ 0.9 3 None 22/03 PM 5.2/ 5.7 0.1/ 0.6 0.5/ 1.0 3 None 23/04 AM 7.3/ 7.8 2.1/ 2.6 1.6/ 2.0 5-8 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 -------- --------- --------- --------- ------- -------- 21/02 AM 4.9/ 5.4 0.4/ 0.9 0.7/ 1.1 3 None 21/03 PM 4.5/ 5.0 0.0/ 0.5 0.7/ 1.1 3 None 22/03 AM 4.7/ 5.2 0.2/ 0.8 0.4/ 0.9 3 None 22/04 PM 4.2/ 4.7 -0.2/ 0.2 0.6/ 1.1 3 None 23/04 AM 6.0/ 6.5 1.5/ 2.0 1.5/ 2.0 4-7 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 -------- --------- --------- --------- ------- -------- 21/02 AM 3.9/ 4.4 0.1/ 0.6 0.5/ 1.0 2 None 21/03 PM 3.7/ 4.2 -0.2/ 0.3 0.6/ 1.1 2 None 22/03 AM 3.9/ 4.4 0.1/ 0.6 0.2/ 0.8 1 None 22/04 PM 3.5/ 4.0 -0.3/ 0.2 0.6/ 1.1 1-2 None 23/04 AM 5.2/ 5.7 1.5/ 2.0 1.6/ 2.0 3-4 Minor 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 -------- --------- --------- --------- ------- -------- 21/01 AM 11.0/11.5 0.9/ 1.4 0.9/ 1.4 3 None 21/02 PM 10.8/11.3 0.7/ 1.1 0.8/ 1.3 3-4 None 22/02 AM 10.9/11.4 0.8/ 1.3 0.5/ 1.0 3 None 22/03 PM 10.1/10.6 0.0/ 0.5 0.5/ 1.0 3 None 23/03 AM 11.7/12.2 1.6/ 2.0 1.3/ 1.8 5-7 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 -------- --------- --------- --------- ------- -------- 21/01 AM 11.5/12.0 1.0/ 1.5 1.0/ 1.5 2 None 21/02 PM 11.3/11.8 0.8/ 1.3 0.9/ 1.4 2 None 22/02 AM 11.5/12.0 1.0/ 1.5 0.7/ 1.1 2 None 22/03 PM 10.6/11.1 0.1/ 0.6 0.6/ 1.1 2 None 23/03 AM 12.4/12.9 1.9/ 2.3 1.5/ 2.0 3-4 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 -------- --------- --------- --------- ------- -------- 21/01 AM 9.9/10.4 -0.5/ 0.0 1.0/ 1.5 2 None 21/02 PM 9.5/10.0 -0.9/-0.4 0.8/ 1.3 2 None 22/02 AM 9.8/10.3 -0.6/-0.1 0.6/ 1.1 1-2 None 22/03 PM 9.0/ 9.5 -1.4/-0.9 0.7/ 1.1 2 None 23/03 AM 11.0/11.5 0.7/ 1.1 1.8/ 2.2 3-4 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 -------- --------- --------- --------- ------- -------- 20/10 PM 4.7/ 5.2 0.2/ 0.8 0.6/ 1.1 1-2 None 21/11 AM 3.7/ 4.2 -0.8/-0.2 0.1/ 0.6 1 None 21/11 PM 4.4/ 4.9 0.0/ 0.5 0.2/ 0.7 1 None 22/12 PM 3.7/ 4.2 -0.8/-0.2 0.2/ 0.7 1-2 None 23/12 AM 4.7/ 5.2 0.4/ 0.9 0.6/ 1.1 3 None 23/01 PM 3.7/ 4.2 -0.8/-0.2 0.4/ 0.9 3 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 -------- --------- --------- --------- ------- -------- 21/12 AM 2.8/ 3.4 0.2/ 0.7 0.6/ 1.1 3 None 21/01 PM 2.6/ 3.1 -0.2/ 0.3 0.7/ 1.1 2 None 22/02 AM 3.0/ 3.5 0.2/ 0.8 0.5/ 1.0 2 None 22/04 PM 2.5/ 3.0 -0.2/ 0.2 0.7/ 1.1 2 None 23/04 AM 4.7/ 5.2 2.1/ 2.6 2.2/ 2.7 3-5 Moderate 23/02 PM 3.2/ 3.7 0.6/ 1.1 1.7/ 2.2 6 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 -------- --------- --------- --------- ------- -------- 21/01 AM 2.2/ 2.7 0.2/ 0.7 0.6/ 1.1 2 None 21/02 PM 2.1/ 2.6 0.1/ 0.6 0.7/ 1.1 2 None 22/02 AM 2.1/ 2.6 0.1/ 0.6 0.5/ 1.0 1-2 None 22/03 PM 1.9/ 2.3 -0.2/ 0.3 0.6/ 1.1 1-2 None 23/04 AM 3.7/ 4.2 1.7/ 2.2 2.0/ 2.5 3-4 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 -------- --------- --------- --------- ------- -------- 21/02 AM 3.7/ 4.2 0.2/ 0.7 0.5/ 1.0 3 None 21/03 PM 3.7/ 4.2 0.1/ 0.6 0.7/ 1.1 3 None 22/03 AM 3.9/ 4.4 0.2/ 0.8 0.4/ 0.9 3 None 22/04 PM 3.4/ 3.9 -0.2/ 0.2 0.6/ 1.1 3 None 23/05 AM 5.7/ 6.2 2.1/ 2.6 2.2/ 2.7 6-8 Minor

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