A nor'easter developing south of the region is expected to bring gusty winds and rough seas to coastal areas near Mount Desert Island, starting Tuesday, Oct. 20. The storm also carries the potential for gale-force conditions over outer waters from Tuesday night into Wednesday, Oct. 21.

According to the National Weather Service in Caribou, the system is expected to increase winds and wave heights across coastal and outer waters on Tuesday and Wednesday. The agency's Monday morning forecast indicates the storm could also affect portions of the Downeast Coast.

Forecast maps show maximum wind gusts generally reaching 25 to 30 mph across coastal waters near Mount Desert Island. This includes offshore areas, such as those south of Bar Harbor in Hancock County.

Marine conditions Tuesday night, Oct. 20, are a particular concern for forecasters, with warnings issued for possible gale-force winds over the outer waters. Wave heights could build to approximately 5 to 7 feet in some offshore locations. Such conditions create potentially hazardous situations for smaller vessels and marine activities.

The storm is expected to remain well south of Maine. It will move from waters off the Mid-Atlantic Coast on Wednesday, then toward areas south of Nova Scotia by Friday.

Despite the significant offshore storm threat, inland communities across northern and eastern Maine are anticipated to experience a relatively quiet weather pattern. Generally dry conditions are expected to persist through Friday as high-pressure systems and weak cold fronts move across the region.

Monday afternoon temperatures were forecast to reach approximately 54 degrees in Bar Harbor. Machias saw 55 degrees, and Eastport 54 degrees. Further inland, Bangor could reach 58 degrees, with Caribou climbing to around 60 degrees.

Forecasters have emphasized that the exact track and strength of the nor'easter still hold some uncertainty. This means that coastal wind and wave forecasts are subject to change as the storm develops and moves.

Boaters, fishing crews, and coastal residents should monitor updated marine forecasts before heading onto the water Tuesday or Wednesday. Staying informed on the latest weather advisories will be crucial for safety on and around the Downeast Coast's marine environments.