Here's what I learned from the locals (Boothbay local residents).......
Someone in the area consulted an oceanographer and his research and thoughts are as follows:
Concurrent with the low tide a strong north wind helped "push" the water out of the harbor, enhancing the low tide. The wind then quickly switched to the south, "pushing" the water back towards the harbor, also causing large waves (wind would be then 180 deg of tide direction). The wind data was confirmed by a weather buoy offshore of Boothbay.
Does/can the wind have that effect on tide levels? Yes. In Galveston Bay, there is a minimal tidal change, usually 1'-2'. When a strong cold front moves through, the wind can lower the water level 3'-5' below normal levels.