Dramatic changes are taking place again at Wasque where the Norton Point breach continues to have a mind of its own. The breach has retreated 800 feet since September, leaving one summer house at the brink.

The breach at Norton Point, with its ever-shifting inlet, dramatic changes in currents and resulting severe erosion, has been billed as “one of the most dynamic coastal systems in Massachusetts.”

With growing evidence the Norton Point breach is appearing to close — lessening the current running through the harbor—there is buzz on the waterfront that the summer ahead will be easier for a lot of visiting boaters, particularly the local fleet of day sailboats.

A little more than two years after a hurricane-like spring storm tore a wide opening at Norton Point beach in Edgartown, the breach has begun to change, migrating eastward toward Chappaquiddick. As a result the tides in Katama Bay and the Edgartown harbor have begun to moderate, which may mean some relief for sailors and boaters this summer.

Rising sea level changes, together with changing geology, may be preventing the breach at Norton Point Beach from closing, according to a National Oceanic and Atmospheric Administration oceanographer.

Todd Ehret, an oceanographer with the National Ocean Service in Maryland, said he is aware of Edgartown’s problem. He said there is no assurance that the opening at Norton Point Beach will close, though history suggests it.

When it comes to sandy beaches, barrier beaches and inlets, Mr. Ehret said changes are under way around the country.