Bioluminescent Waves 2025 Schedule. Playa del rey, ca — it's getting darker earlier, and when the sun falls you now have a chance to watch the return of stunning blue, bioluminescent waves in southern california. The phenomenon, which is sporadic and difficult to predict, is caused by bioluminescent plankton that light up when they tumble around in the surf or hit the legs of people.

Here’s how long an expert says the magical phenomenon might stick. The dark green days indicate best viewing days for.