Brewster is a classic Cape Cod town with sandy Cape Cod Bay beaches, salt marshes and easy outdoor options (paddling, biking and nearby state parks), plus cozy galleries, seafood restaurants and a relaxed village center that makes multi-week stays comfortable and interesting.
For more activity, Hyannis (≈17 miles) provides ferries, larger shopping and nightlife, and historic Plymouth (≈45 miles) is an easy day trip for museums and dining, so you can balance quiet Cape living with nearby options.