Lychee fruit is primarily sweet, but it possesses subtle acidic notes that contribute to its overall flavor profile.
While the dominant taste of lychee is sweetness, often compared to strawberries or pears, there's an underlying hint of acidity that prevents it from being cloyingly sweet. This slightly tart element, along with floral notes, creates a balanced and refreshing taste experience. Think of it as having a touch of citrus complementing the sweet base. Therefore, while not sour in the traditional sense (like a lemon or lime), lychee does have a level of acidity that enhances its flavor.