| | | |
| June 12, 2018 | L | Falmouth Commodores 10 at Hyannis Harbor Hawks 4 | Final |
| June 13, 2018 | | Hyannis Harbor Hawks at Falmouth Commodores | Ppd. |
| June 14, 2018 | W | Harwich Mariners 3 at Hyannis Harbor Hawks 5 | Final |
| June 15, 2018 | W | Hyannis Harbor Hawks 4 at Cotuit Kettleers 1 | Final |
| June 16, 2018 | L | Hyannis Harbor Hawks 1 at Chatham Anglers 10 | Final |
| June 17, 2018 | W | Brewster Whitecaps 3 at Hyannis Harbor Hawks 4 (Game 1) | Final (7) |
| June 17, 2018 | W | Brewster Whitecaps 5 at Hyannis Harbor Hawks 6 (Game 2) | Final (7) |
| June 19, 2018 | L | Cotuit Kettleers 10 at Hyannis Harbor Hawks 4 | Final |
| June 20, 2018 | L | Hyannis Harbor Hawks 0 at Wareham Gatemen 9 | Final |
| June 21, 2018 | T | Hyannis Harbor Hawks 3 at Chatham Anglers 3 | Final (5) |
| June 22, 2018 | W | Falmouth Commodores 1 at Hyannis Harbor Hawks 2 | Final (10) |
| June 23, 2018 | | Harwich Mariners at Hyannis Harbor Hawks | Ppd. |
| June 24, 2018 | W | Hyannis Harbor Hawks 7 at Orleans Firebirds 3 (Game 1) | Final (7) |
| June 24, 2018 | W | Hyannis Harbor Hawks 3 at Orleans Firebirds 2 (Game 2) | Final (8) |
| June 26, 2018 | W | Wareham Gatemen 1 at Hyannis Harbor Hawks 9 | Final |
| June 27, 2018 | W | Hyannis Harbor Hawks 7 at Brewster Whitecaps 5 | Final |
| June 29, 2018 | L | Hyannis Harbor Hawks 3 at Wareham Gatemen 4 | Final |
| June 30, 2018 | L | Wareham Gatemen 17 at Hyannis Harbor Hawks 4 | Final |
| July 1, 2018 | W | Hyannis Harbor Hawks 2 at Harwich Mariners 1 | Final |
| July 3, 2018 | W | Bourne Braves 4 at Hyannis Harbor Hawks 6 | Final |
| July 4, 2018 | L | Yarmouth-Dennis Red Sox 7 at Hyannis Harbor Hawks 2 | Final |
| July 5, 2018 | T | Hyannis Harbor Hawks 7 at Yarmouth-Dennis Red Sox 7 | Final (8) |
| July 6, 2018 | | Orleans Firebirds at Hyannis Harbor Hawks | Ppd. |
| July 7, 2018 | L | Hyannis Harbor Hawks 3 at Cotuit Kettleers 8 | Final |
| July 8, 2018 | W | Wareham Gatemen 5 at Hyannis Harbor Hawks 9 | Final |
| July 9, 2018 | W | Hyannis Harbor Hawks 4 at Harwich Mariners 3 | Final |
| July 11, 2018 | W | Cotuit Kettleers 2 at Hyannis Harbor Hawks 5 | Final |
| July 12, 2018 | L | Hyannis Harbor Hawks 3 at Falmouth Commodores 4 | Final |
| July 13, 2018 | W | Hyannis Harbor Hawks 5 at Bourne Braves 2 | Final |
| July 14, 2018 | L | Cotuit Kettleers 9 at Hyannis Harbor Hawks 5 | Final |
| July 15, 2018 | W | Hyannis Harbor Hawks 4 at Bourne Braves 3 | Final |
| July 17, 2018 | W | Bourne Braves 4 at Hyannis Harbor Hawks 8 | Final |
| July 18, 2018 | L | Chatham Anglers 6 at Hyannis Harbor Hawks 5 (Game 1) | Final |
| July 18, 2018 | L | Chatham Anglers 6 at Hyannis Harbor Hawks 5 (Game 2) | Final |
| July 19, 2018 | L | Hyannis Harbor Hawks 2 at Cotuit Kettleers 7 | Final |
| July 20, 2018 | W | Orleans Firebirds 1 at Hyannis Harbor Hawks 4 | Final |
| July 21, 2018 | L | Hyannis Harbor Hawks 3 at Falmouth Commodores 5 | Final |
| July 24, 2018 | W | Falmouth Commodores 7 at Hyannis Harbor Hawks 9 | Final |
| July 25, 2018 | L | Hyannis Harbor Hawks 1 at Bourne Braves 2 | Final (11) |
| July 27, 2018 | T | Hyannis Harbor Hawks 4 at Brewster Whitecaps 4 | Final |
| July 28, 2018 | L | Chatham Anglers 9 at Hyannis Harbor Hawks 2 | Final |
| July 29, 2018 | L | Hyannis Harbor Hawks 6 at Wareham Gatemen 10 | Final |
| July 30, 2018 | W | Orleans Firebirds 9 at Hyannis Harbor Hawks 11 | Final |
| July 31, 2018 | W | Bourne Braves 3 at Hyannis Harbor Hawks 4 | Final |
| August 1, 2018 | W | Hyannis Harbor Hawks 6 at Yarmouth-Dennis Red Sox 2 | Final |
| August 2, 2018 | L | Yarmouth-Dennis Red Sox 9 at Hyannis Harbor Hawks 1 | Final |
| August 4, 2018 | | Falmouth Commodores at Hyannis Harbor Hawks (Playoff Gm. 1) | Ppd. |
| August 5, 2018 | | Falmouth Commodores at Hyannis Harbor Hawks (Playoff Gm. 1) | Ppd. |
| August 6, 2018 | L | Falmouth Commodores 2 at Hyannis Harbor Hawks 1 (Playoff Gm. 1) | Final |
| August 7, 2018 | L | Hyannis Harbor Hawks 2 at Falmouth Commodores 3 (Playoff Gm. 2) | Final |
Hyannis Harbor Hawks Schedule
