Active Weather Alerts
High Surf Advisory
Issued: 5:03 PM Aug. 21, 2025 – National Weather Service
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... ...COASTAL FLOOD STATEMENT IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH LATE FRIDAY NIGHT... * 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 Massachusetts coast. * WHEN...For the High Surf Advisory, until 8 PM EDT Saturday. * IMPACTS...Some water on low lying roads and property around high tide. Dangerous swimming and surfing conditions and significant beach erosion. PRECAUTIONARY/PREPAREDNESS ACTIONS... Many ocean beaches are closed. Stay out out of the water due to dangerous surf conditions. Only view surf at a safe distance, not from near the shore, or from jetties or piers. Avoid any flooded roads during high tide. && && 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 -------- --------- --------- --------- ------- -------- 21/11 AM 8.9/ 9.4 -0.8/-0.2 0.4/ 0.9 2-3 None 21/11 PM 10.8/11.3 1.2/ 1.7 0.7/ 1.1 4-5 None 22/11 AM 10.0/10.5 0.4/ 0.9 1.3/ 1.8 7-8 None 23/12 AM 11.2/11.7 1.6/ 2.0 1.1/ 1.6 7 None 23/12 PM 9.6/10.1 0.0/ 0.5 0.6/ 1.1 6 None 24/12 AM 10.2/10.7 0.6/ 1.1 0.2/ 0.8 5-6 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 -------- --------- --------- --------- ------- -------- 21/11 AM 8.0/ 8.5 -1.6/-1.1 0.4/ 0.9 2-3 None 21/11 PM 9.8/10.3 0.2/ 0.8 0.7/ 1.1 3-4 None 22/11 AM 9.0/ 9.5 -0.6/-0.1 1.3/ 1.8 5 None 23/12 AM 10.1/10.6 0.6/ 1.1 1.1/ 1.6 5-6 None 23/12 PM 8.7/ 9.2 -0.9/-0.4 0.7/ 1.1 4 None 24/12 AM 9.1/ 9.6 -0.5/ 0.0 0.4/ 0.9 4 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 -------- --------- --------- --------- ------- -------- 21/10 AM 9.2/ 9.7 -0.6/-0.1 0.7/ 1.1 2-3 None 21/11 PM 11.0/11.5 1.3/ 1.8 0.8/ 1.3 3-4 None 22/11 AM 10.1/10.6 0.4/ 0.9 1.3/ 1.8 6 None 23/12 AM 11.2/11.7 1.5/ 2.0 1.1/ 1.6 5-6 None 23/12 PM 9.7/10.2 0.0/ 0.5 0.6/ 1.1 5 None 24/12 AM 10.4/10.9 0.7/ 1.1 0.5/ 1.0 4-5 None &&
Coastal Flood Statement
Issued: 5:03 PM Aug. 21, 2025 – National Weather Service
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... ...COASTAL FLOOD STATEMENT IN EFFECT FROM 6 PM EDT THIS EVENING THROUGH LATE FRIDAY NIGHT... * 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 Massachusetts coast. * WHEN...For the High Surf Advisory, until 8 PM EDT Saturday. * IMPACTS...Some water on low lying roads and property around high tide. Dangerous swimming and surfing conditions and significant beach erosion. PRECAUTIONARY/PREPAREDNESS ACTIONS... Many ocean beaches are closed. Stay out out of the water due to dangerous surf conditions. Only view surf at a safe distance, not from near the shore, or from jetties or piers. Avoid any flooded roads during high tide. && && 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 -------- --------- --------- --------- ------- -------- 21/11 AM 8.9/ 9.4 -0.8/-0.2 0.4/ 0.9 2-3 None 21/11 PM 10.8/11.3 1.2/ 1.7 0.7/ 1.1 4-5 None 22/11 AM 10.0/10.5 0.4/ 0.9 1.3/ 1.8 7-8 None 23/12 AM 11.2/11.7 1.6/ 2.0 1.1/ 1.6 7 None 23/12 PM 9.6/10.1 0.0/ 0.5 0.6/ 1.1 6 None 24/12 AM 10.2/10.7 0.6/ 1.1 0.2/ 0.8 5-6 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 -------- --------- --------- --------- ------- -------- 21/11 AM 8.0/ 8.5 -1.6/-1.1 0.4/ 0.9 2-3 None 21/11 PM 9.8/10.3 0.2/ 0.8 0.7/ 1.1 3-4 None 22/11 AM 9.0/ 9.5 -0.6/-0.1 1.3/ 1.8 5 None 23/12 AM 10.1/10.6 0.6/ 1.1 1.1/ 1.6 5-6 None 23/12 PM 8.7/ 9.2 -0.9/-0.4 0.7/ 1.1 4 None 24/12 AM 9.1/ 9.6 -0.5/ 0.0 0.4/ 0.9 4 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 -------- --------- --------- --------- ------- -------- 21/10 AM 9.2/ 9.7 -0.6/-0.1 0.7/ 1.1 2-3 None 21/11 PM 11.0/11.5 1.3/ 1.8 0.8/ 1.3 3-4 None 22/11 AM 10.1/10.6 0.4/ 0.9 1.3/ 1.8 6 None 23/12 AM 11.2/11.7 1.5/ 2.0 1.1/ 1.6 5-6 None 23/12 PM 9.7/10.2 0.0/ 0.5 0.6/ 1.1 5 None 24/12 AM 10.4/10.9 0.7/ 1.1 0.5/ 1.0 4-5 None &&
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