Boston, Massachusetts – Hazardous marine conditions are set to intensify rapidly offshore by Monday afternoon, with gale-force winds up to 35 knots and wave heights building to 13 feet, creating dangerous conditions for vessels across key North Atlantic shipping lanes.
According to the National Weather Service Ocean Prediction Center, a Gale Warning is in effect for offshore waters from the Gulf of Maine to Georges Bank and east toward the Hague Line. Southwest winds will strengthen to 25 to 35 knots by Monday afternoon, driving seas from 5 to 9 feet early in the day up to 8 to 12 feet by Monday night.
Conditions will remain dangerous into midweek. Seas are expected to peak between 9 and 13 feet Tuesday through Wednesday, with persistent southwest winds of 20 to 30 knots. Areas of rain and fog Tuesday could reduce visibility to 1 nautical mile or less, especially across Georges Bank and the Gulf of Maine.
Shipping routes and fishing operations near Georges Bank, as well as offshore lanes east of 69W, will face the highest risk of rough seas and strong winds. Smaller vessels should avoid open waters during peak conditions, while larger vessels should prepare for significant wave action and reduced visibility.
Winds begin to ease slightly by Thursday, but elevated seas near 5 to 7 feet will continue. Additional marine advisories remain likely as conditions stay unsettled through midweek.
