Snorkeling at Ilhéu de Vila Franca is a unique experience: you are diving on your own private island. The water is quite warm for snorkeling, with variety of fish to see such as jelly fish, sea cucumber, etc. A crater that is just off the coast of São Miguel forms this tiny little island.
You can take a small ferryboat to the island from the Marina at Vila Franca do Campo. It costs just a few Euros to go there and back. The crater fills with salt water and is protected from the ocean. Because of this the water is very calm and safe to swim in and it is perfect for swimming and snorkeling.