Peel the oranges, making sure to cut down to the flesh. Cut the orange segments away from the membranes and place the segments and accumulated juices into a large bowl. Squeeze any juice from the pieces of orange rind and add it to the bowl.
Toss the grapes and apples with the oranges, mixing well.
Cover and refrigerate for at least 1 hour until well chilled.
Add the bananas and refrigerate for 1 more hour before serving.
Divide the mixture among six 8-ounce bowls and top each serving with a sprinkling of the coconut.