In the morning: Go to beach or visit the nearby islands, do kayaking, sailing, kitesurfing, diving or other water sports, or begin the ride around the island.
At noon: The sun is usually strong and it is recommended, if you are on the beach, to use sunscreen and stay hydrated. It is a time of the day when most of the stores are closed; therefore, going shopping is not recommended, but you can find a good restaurant to have lunch.
In the afternoon: Go to the beach, go shopping, visit other tourist sites, walk along the pedestrian street or look for a good place to spend the evening having drinks or a nice meal.
At night: Walk along the pedestrian street or find a good bar or club to enjoy the nightlife on the island.
Don´t forget to use insect repellent. Mosquitoes tend to be more active at dawn and dusk.