Dress for beach wedding in August

djoanna2010

I'm getting married in August, in Hawaii. So, it will be a beach wedding, some friends and family (about 30-40 guests) and am desperately trying to decide on a dress. 

Please help from the following dresses. Also, feel free to suggest if you have any suggestions.

They're all from Nordstrom, and I have already tried them.

http://blizit.blizini.com/give/091870bb9d02ce9f0dc2f06cd9e795ff

djoanna2010

Thanks all.

Should I have the entire 3rd dress lined, or just in specific areas (you know what I mean) on top and perhaps from waist till knees (or more or less) ?

I love it and am sure about lining, just not sure how much and where all.