It's "peak white shark season," experts say. Here's where they've been spotted this weekend in Massachusetts.

Summer may be over, but great white sharks are still very prevalent in the waters around Massachusetts.

State shark biologist John Chisholm posted to social media about multiple shark sightings off Cape Cod this weekend.

"It's peak white shark season so stay vigilant if you're going in the water," Chisholm wrote .

The Atlantic White Shark Conservancy's shark-tracking app "Sharktivity" has logged more than a dozen reports of great white sharks near Massachusetts shores since Friday. Here's a look at where they are.

Cape Cod Bay shark sighting

On Friday there was a shark sighting off Sandy Neck Beach in West Barnstable.

Last month, a boater in the same area said he fulfilled a lifelong dream when a great white swam alongside his boat for about 10 minutes.

Chatham shark sightings