Jen... packing for this trip means extra layers. You'll want a pair or two of shorts for the first and last couple of days, but mostly you'll wear long pants and long sleeves. We were in Usiaua (sp?) during their mid-summer and it had snowed the day before! Because we live in the NE I happened to have a polar fleece jacket, gloves and a hat that I wore there and I sure needed these. It's COLD on the veranda when at sea or viewing the glaciers. You'll want warm socks and sneakers/shoes (NOT sandals). A couple of days reminded me of our late October... cords and sweater weather. If you're used to warmer climates it will seem even colder for you. We were very surprised at how cold it was... we didn't investigate it well at all. Of course, there are plenty of sweatshirts and warm things to buy in port and on the ship.