Presuming that you're discussing a sangria that has been made with fresh fruit, and not a shelf-stable item, it will last for about 3-4 days in the refrigerator. After that, the fruit will begin to break down and the sangria will end up being less delicious. If you're seeking to extend the life of your sangria, you can freeze the fruit before including it to the wine. https://freecex.com/?p=803 This will help to keep the fruit fresh and the sangria flavorful for a longer period of time.