How to dress for 70 degree weather?

Hi everyone,

I'm just a few days away from my western Caribbean cruise (to Cozumel & Progreso). I was hoping for a solid 80 degree high, so I could comfortably wear my shorts and flip flops, but it looks like the forecast is showing that Mexico will be affected by the upcoming cold/cool front, bringing temps to a high in the low 70s during our stay.

How do you dress when the weather is in the low 70s for most of the day? (I am from Texas and get chilly very easily). Also, we are planning to scuba dive in Cozumel, but I hope the water isnt too cold!

On another note...how do you dress for sea days that are likely windy and with a high in the 60s??

Any thoughts are appreciated...

Dress in layers. Take light jackets, sweaters, etc. for those colder days. I always seem to use them on board as well in areas which are over air-conditioned. Take some long pants too! This is where those pants with removable legs come in very handy!