The Cape and Islands saw midday tides fall to what the Chappy Ferry Facebook page called "nearly historic lows" Sunday and Monday.
In Edgartown Monday afternoon, Fuller and Lighthouse beaches were high and dry, with a bathtub ring of rocks and a string of sandbars.
"The tide went out and stayed out," posted Woods Hole radio station WCAI on its Facebook page, along with a NOAA chart showing the dramatic change between Saturday's ebb and that of the following two days.
Posting on its Facebook page, the Woods Hole Inn called it "an epic low tide."
Chappy Ferry had no explanation: "This was supposed to be a regular half-moon low tide. We didn't really have a storm surge during the gale of the previous day."
Can anyone answer the question: What caused these "epic" lows?
Did you see the low tides? Do you have photos to share? We'd love to see them.
Stay Patched in! Follow Martha's Vineyard Patch on Twitter | Like Martha's Vineyard Patch on Facebook | Sign up for the daily email with links to the latest news | Got something to say? Start a blog and share your views.