Cabo whale watching

We will be in Cabo in January and have booked a whale watching excursion. What is the weather typically like that time of year? I realize weather is subject to change from one day to the next, but need an idea of clothes to pack for being on the water. Thanks for any help anyone can give me.

Every time I've been to Cabo the weather has been perfect. I have been there between Late Nov. and April. Always right at 80 degrees. Never a need for a jacket, except the first and last sea days of a cruise. I have reserved a Zodiac Whale watch for the first of March. Can hardly wait. Have a great cruise, and I hope you see lots of Whales. :D