Apparently, there’s a risk of strange and dangerous currents, not so much a tsunami. Surfers should stay out of the water.
I maintain a pretty healthy sense of risk on the ocean even at the best of times and more so as the years go by and my experience grows. I can definitely see where you'd want to be extra cautious around somewhere like the outside of the Broken Group for the next few days.
Ever picked goose-barnacles or seen where commercial pickers go? I worked as a coordinator for an experimental fishery for goose-barnacles and often had to land a boat or someone onto the exposed bare rocks they're harvested from. If the La Perouse weather buoy said 2m seas that was our no-go limit but of course the buoy is 15 miles offshore so...no need to take a grain of salt with you.