We did a cruise on the Ryndam, January and February of this year. It started in San Diego and included several days in the Antarctica. It was a fabulous itinerary and I would agree on the later date. Our weather was excellent, except for some rain in Pureto Montt and drizzle in Ushuaia. Neither kept us from enjoying our days. We saw so many birds, had two birding experts on board doing lectures/viewing, and saw penguins nesting and playing just a few feet away from us. We also saw whales at a distance. All of the ports were unique and worth exploring. Have a wonderful trip!