Current atmospheric conditions across the East Coast marine zones feature a transition toward easterly flow as high pressure shifts. For the Massachusetts and Rhode Island coastal waters, southeast winds are holding between 10 to 15 knots with occasional gusts reaching 20 knots. Moving toward the Mid-Atlantic and Casco Bay regions, patchy fog is expected to reduce visibility to between 1 and 3 nautical miles throughout the morning hours.
The ocean state is characterized by average wave sizes ranging from 2 to 4 feet in sheltered bays, while outer coastal waters from Stonington to Port Clyde are experiencing larger seas up to 5 feet. Primary swell activity is originating from the south and southeast, with significant wave heights measured at 4 feet and a dominant period of 6 seconds, supplemented by a secondary southeast swell at 2 feet with a 9-second period.
Tidal cycles for the day show a high tide at approximately 5:19 AM with a height of 3.43 feet, followed by a low tide at 10:57 AM reaching near 0.01 feet. A second high tide is anticipated at 5:49 PM at 4.20 feet, with the final low of the day occurring just before midnight at 0.03 feet. These predictions are consistent with localized NOAA data for the northern Atlantic corridor.
Looking ahead to the remainder of the day, rain is likely to develop by the afternoon as winds shift to the northeast at 15 to 20 knots. Small craft advisories remain in effect for several northern zones due to the combination of building seas and reduced visibility in precipitation and fog.