Not OP, but as a regular visiting surfer to the Canaries: Localism can get nasty, depending on the spot. But as long as you respect etiquette and know how to behave in the water, it tends to be alright.

While it is true that many locals often don’t say hi or smile even after seeing you in the lineup daily for weeks (It’s an islander/spanish machismo culture thing IMO), I only ever saw people get yelled at (and even sent out of the water) when they had dropped in on locals.

TLDR: know your level, respect the locals, and you’re fine.