Active Weather Alerts
High Surf Advisory
Issued: 11:56 PM Aug. 21, 2025 – National Weather Service
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 6 AM FRIDAY TO 8 PM EDT SATURDAY... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 10 PM FRIDAY TO 1 AM EDT SATURDAY... ...HIGH RIP CURRENT RISK IS CANCELLED... * WHAT...For the High Surf Advisory, large breaking waves of 6 to 10 feet and a high risk of dangerous rip currents. For the Coastal Flood Advisory, minor coastal flooding and splash- over. * WHERE...In Maine, Coastal York, Coastal Cumberland, Sagadahoc, Lincoln and Knox Counties. In New Hampshire, Coastal Rockingham County. * WHEN...For the High Surf Advisory, from 6 AM Friday to 8 PM EDT Saturday. For the Coastal Flood Advisory, from 10 PM Friday to 1 AM EDT Saturday. * 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. Large waves can present a danger to people on rocks above the water. Stay away from rock outcrops along the shoreline exposed to ocean waves...as waves can easily sweep people into the cold ocean water. && Time of high total tides are approximate to the nearest hour. Seavey Island / Portsmouth NH MLLW Categories - Minor 11.5 ft, Moderate 12.5 ft, Major 13.5 ft MHHW Categories - Minor 2.6 ft, Moderate 3.6 ft, Major 4.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 10.5 1.6 1.1 3-4 None 22/12 PM 9.8 0.9 1.6 5-6 None 23/12 AM 11.0 2.1 1.6 6 None 23/12 PM 9.5 0.6 1.1 6 None 24/12 AM 9.7 0.8 0.5 6 None 24/01 PM 9.0 0.1 0.4 4-5 None Hampton Harbor NH MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.0 ft MHHW Categories - Minor 1.4 ft, Moderate 2.4 ft, Major 3.4 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 10.6 1.0 1.1 1 None 22/11 AM 9.9 0.3 1.6 1 None 23/12 AM 11.1 1.5 1.6 1 Minor 23/12 PM 9.6 0.0 1.1 1 None 24/12 AM 9.9 0.3 0.5 1 None 24/01 PM 9.1 -0.5 0.4 1 None Portland ME MLLW Categories - Minor 12.0 ft, Moderate 13.0 ft, Major 14.0 ft MHHW Categories - Minor 2.1 ft, Moderate 3.1 ft, Major 4.1 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 11.3 1.4 1.0 1 None 22/11 AM 10.8 0.9 1.7 1 None 22/11 PM 12.2 2.3 1.9 1 Minor 23/12 PM 10.7 0.8 1.3 1 None 24/12 AM 11.0 1.1 0.7 1 None 24/01 PM 10.0 0.1 0.5 1 None Arrowsic Test Point MLLW Categories - Minor 11.5 ft, Moderate 12.5 ft, Major 13.5 ft MHHW Categories - Minor 3.7 ft, Moderate 4.7 ft, Major 5.7 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 10.2 2.4 1.0 0 None 22/12 PM 9.8 2.0 1.7 0 None 23/12 AM 11.2 3.4 2.0 0 None 23/12 PM 9.6 1.8 1.3 0 None 24/01 AM 9.9 2.1 0.8 0 None 24/01 PM 9.0 1.2 0.6 0 None Bath ME MLLW Categories - Minor 9.5 ft, Moderate 11.0 ft, Major 12.0 ft MHHW Categories - Minor 2.1 ft, Moderate 3.6 ft, Major 4.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 9.0 1.6 1.0 0 None 22/12 PM 8.5 1.1 1.6 0 None 23/12 AM 10.0 2.6 2.0 0 Minor 23/01 PM 8.5 1.1 1.4 0 None 24/01 AM 8.8 1.4 0.9 0 None 24/01 PM 7.7 0.3 0.6 0 None Boothbay Harbor ME MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 3.3 ft, Moderate 4.3 ft, Major 5.3 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/10 PM 10.8 1.1 0.9 2-3 None 22/11 AM 10.5 0.8 1.7 3-4 None 22/11 PM 12.0 2.3 2.0 3-4 None 23/12 PM 10.3 0.6 1.3 2 None 24/12 AM 10.7 1.0 0.7 2 None 24/01 PM 9.7 -0.0 0.5 2-3 None Saint George MLLW Categories - Minor 12.5 ft, Moderate 13.5 ft, Major 14.5 ft MHHW Categories - Minor 2.6 ft, Moderate 3.6 ft, Major 4.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/10 PM 11.1 1.2 0.9 4-5 None 22/11 AM 10.7 0.8 1.7 7-8 None 22/11 PM 12.2 2.3 2.0 7-8 None 23/12 PM 10.5 0.6 1.3 4-5 None 24/12 AM 11.0 1.1 0.8 3 None 24/01 PM 9.8 -0.1 0.5 3-4 None &&
Coastal Flood Advisory
Issued: 11:56 PM Aug. 21, 2025 – National Weather Service
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 6 AM FRIDAY TO 8 PM EDT SATURDAY... ...COASTAL FLOOD ADVISORY REMAINS IN EFFECT FROM 10 PM FRIDAY TO 1 AM EDT SATURDAY... ...HIGH RIP CURRENT RISK IS CANCELLED... * WHAT...For the High Surf Advisory, large breaking waves of 6 to 10 feet and a high risk of dangerous rip currents. For the Coastal Flood Advisory, minor coastal flooding and splash- over. * WHERE...In Maine, Coastal York, Coastal Cumberland, Sagadahoc, Lincoln and Knox Counties. In New Hampshire, Coastal Rockingham County. * WHEN...For the High Surf Advisory, from 6 AM Friday to 8 PM EDT Saturday. For the Coastal Flood Advisory, from 10 PM Friday to 1 AM EDT Saturday. * 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. Large waves can present a danger to people on rocks above the water. Stay away from rock outcrops along the shoreline exposed to ocean waves...as waves can easily sweep people into the cold ocean water. && Time of high total tides are approximate to the nearest hour. Seavey Island / Portsmouth NH MLLW Categories - Minor 11.5 ft, Moderate 12.5 ft, Major 13.5 ft MHHW Categories - Minor 2.6 ft, Moderate 3.6 ft, Major 4.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 10.5 1.6 1.1 3-4 None 22/12 PM 9.8 0.9 1.6 5-6 None 23/12 AM 11.0 2.1 1.6 6 None 23/12 PM 9.5 0.6 1.1 6 None 24/12 AM 9.7 0.8 0.5 6 None 24/01 PM 9.0 0.1 0.4 4-5 None Hampton Harbor NH MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.0 ft MHHW Categories - Minor 1.4 ft, Moderate 2.4 ft, Major 3.4 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 10.6 1.0 1.1 1 None 22/11 AM 9.9 0.3 1.6 1 None 23/12 AM 11.1 1.5 1.6 1 Minor 23/12 PM 9.6 0.0 1.1 1 None 24/12 AM 9.9 0.3 0.5 1 None 24/01 PM 9.1 -0.5 0.4 1 None Portland ME MLLW Categories - Minor 12.0 ft, Moderate 13.0 ft, Major 14.0 ft MHHW Categories - Minor 2.1 ft, Moderate 3.1 ft, Major 4.1 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 11.3 1.4 1.0 1 None 22/11 AM 10.8 0.9 1.7 1 None 22/11 PM 12.2 2.3 1.9 1 Minor 23/12 PM 10.7 0.8 1.3 1 None 24/12 AM 11.0 1.1 0.7 1 None 24/01 PM 10.0 0.1 0.5 1 None Arrowsic Test Point MLLW Categories - Minor 11.5 ft, Moderate 12.5 ft, Major 13.5 ft MHHW Categories - Minor 3.7 ft, Moderate 4.7 ft, Major 5.7 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 10.2 2.4 1.0 0 None 22/12 PM 9.8 2.0 1.7 0 None 23/12 AM 11.2 3.4 2.0 0 None 23/12 PM 9.6 1.8 1.3 0 None 24/01 AM 9.9 2.1 0.8 0 None 24/01 PM 9.0 1.2 0.6 0 None Bath ME MLLW Categories - Minor 9.5 ft, Moderate 11.0 ft, Major 12.0 ft MHHW Categories - Minor 2.1 ft, Moderate 3.6 ft, Major 4.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/11 PM 9.0 1.6 1.0 0 None 22/12 PM 8.5 1.1 1.6 0 None 23/12 AM 10.0 2.6 2.0 0 Minor 23/01 PM 8.5 1.1 1.4 0 None 24/01 AM 8.8 1.4 0.9 0 None 24/01 PM 7.7 0.3 0.6 0 None Boothbay Harbor ME MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 3.3 ft, Moderate 4.3 ft, Major 5.3 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/10 PM 10.8 1.1 0.9 2-3 None 22/11 AM 10.5 0.8 1.7 3-4 None 22/11 PM 12.0 2.3 2.0 3-4 None 23/12 PM 10.3 0.6 1.3 2 None 24/12 AM 10.7 1.0 0.7 2 None 24/01 PM 9.7 -0.0 0.5 2-3 None Saint George MLLW Categories - Minor 12.5 ft, Moderate 13.5 ft, Major 14.5 ft MHHW Categories - Minor 2.6 ft, Moderate 3.6 ft, Major 4.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 21/10 PM 11.1 1.2 0.9 4-5 None 22/11 AM 10.7 0.8 1.7 7-8 None 22/11 PM 12.2 2.3 2.0 7-8 None 23/12 PM 10.5 0.6 1.3 4-5 None 24/12 AM 11.0 1.1 0.8 3 None 24/01 PM 9.8 -0.1 0.5 3-4 None &&
Small Craft Advisory
Issued: 5:21 PM Aug. 21, 2025 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM EDT SATURDAY... * WHAT...North to northeast winds 10 to 20 kt with gusts up to 30 kt and seas 6 to 9 ft expected. Gusts to around 20 kt in Penobscot Bay. * WHERE...Penobscot Bay and Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM. * WHEN...From 8 PM this evening to 8 PM EDT Saturday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. &&
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