In only 3 weeks, I'll be heading out on my first cruise to Hawaii. The only other cruise I have taken was to Cancun and Cozumel, out of Mobile, Alabama--in August. I knew what the temps would be for that cruise... but I'm not sure about cruising from San Francisco to Hawaii from October 6-21. I assume the daytime temps at sea will be pleasantly warm (70's and up), but what about the evenings? I haven't planned to pack any slacks or warm tops, just capris, dresses and a couple of jackets and shrugs. Is that appropriate? Any advice you seasoned cruisers can offer will be greatly appreciated!