This really sucks because we are not even into June yet and my water temprature is 90 degrees. How is that supposed to be refreshing?

I am in Southern Louisiana and my pool gets full sun from about 8am to 4pm which is the reason it warms up so quickly. Besides covering half of the pool with a patio cover to provide shade would there be any other method of keeping the water cooler?

I know it's a long shot but I had to ask