If you think it is too much, it is too much. Biologically, you'd have to have 50+% coverage to be a big problem.
You basically have three choices. You can apply an algaecide now to knock it out, understanding it is likely to return within a month. Or, you can stock tilapia to eat it and expect it to be reduced within three to four weeks. Or, you can do both.
If you leave it alone, you'll have mats of dead algae floating all over for a few weeks. Algae which grows now tends to subside when temperatures rise.

Teach a man to grow fish...
He can teach to catch fish...