I wonder the same, the tides in Chiloé vary a lot.
Actually I think living there, anywhere, is a challenge. It rains almost every day.
I've stayed there for 5 days, 5 days of rain, I had to accept and go explore just like that. All my clothes and sleeping bag felt wet after so many days of rain.
But its definetely worth visiting, the culture, culinary and way of life are so unique.