Bring water to a boil in a pot. Add hibiscus flowers and steep for 10 minutes.
Strain the tea and let it cool to room temperature.
Place chopped mangoes in a blender with honey and lime juice. Blend until smooth.
Mix the mango puree with the hibiscus tea in a large pitcher. Add coconut water and stir well.
Refrigerate for at least 2 hours until chilled.
Fill glasses with ice cubes. Pour the mango hibiscus mix over ice.
Garnish each glass with mint leaves and lime wheels before serving.
Notes
The mocktail stays fresh in the fridge for up to 3 days.For a sweeter drink, add more honey or agave nectar to taste.Replace fresh mangoes with 2 cups of frozen mango chunks when fresh ones aren't available.Make ice cubes from hibiscus tea to prevent the drink from getting watered down.Strain the mango puree through a fine mesh strainer for a smoother texture.