Yes, JimmyTammy. You can see the fireworks from the beach at Fort Wilderness. You can't see the castle or fireworks right around the castle due to trees (what was Discovery Island), but all of the fireworks in the sky are visible. They have several speakers set up along the length of the beach where they play the music for the fireworks show. In addition, there is the Electrical Water Pageant out on Bay Lake just before the fireworks start.
It can get a little busy and there are only so many chairs. I would suggest staking out a spot a little bit early unless you don't mind sitting in the sand.