Solar cover worth it in Socal?

[noworries]

Just recently bought a house with a pool. Have already replaced the pump, added a SWG, and bought a barracuda g4 pool cleaner.

The pool is pretty big (35'x15') and has no heater.

I'm in socal, and the pool gets direct sunlight pretty much all day so far.

Is it worth getting a solar cover? Seems like a big PITA to have to cover & uncover the pool to use it. I drained the pool in April when I moved in, and filled it with 70F tap water. It's been in the mid to high 80's all summer. I'm worried that after this winter when the pool gets really cold it will take a lot longer to heat up via the sun. Would having a solar cover make much difference here? or would i be better off putting the money towards a pool heater.