The weather around the Galapagos Islands is pretty much the same during the year. The differences are very small. The important thing when you are on a cruise on a small size ship is the waves. The good news here is that the Pacific Ocean here really shows and proves the origin of the word. Very pacific waves. If at all you will experience very slow long gentle waves while on the boat, which does not mean that landings can not sometimes become tricky. Rain is always limited and sunshine pretty much guaranteed.