Do not worry for the beach. - About 7 days ago I was in Arillas , after an overnight storm , and all the kelp on the beach was not a pretty sight. The next day, after overnight bad weather, all was OK and the beach looked very well indeed. - Now that 'ole kelp n seaweed is back but this is not a problem for all here.
Those super switched on locals will clear what nature leaves behind. - Twill be a pussycat by May.
Cheers
Negg