When there's short period local swell does a tide push effect the swell less? It seems like a longer period swell gets more out of a tide push than a shorter period: could all be in my head.
Probably depends a lot on location. I agree with your observation for most of the spots I surf on the Delmarva. There are definitely places around here where a small-medium sized long period swell will just fade to nothing on the mid-low tide outgoing. And just in general it seems like the longer the swell period the more the difference in tide affects the swell size. I always figured this is due to longer period swells being way more influenced by the ocean bottom than shorter period wind swells. There are definitely places around here where a small-medium sized long period swell will just fade to nothing on the mid-low tide outgoing
Yes and yes. They are both affected. Long periods have more power and force, so when met with a tidal push, which is the opposing force, you will see a stronger reaction and effect. Areas with larger tide swings are much more effected by it, where places like the west coast, you really don't notice it as much. So yes.