Catja,
Welcome to DR1 your helpful information tool for anything relating to the Dominican republic. You will be visiting after the hurricane season so you should have no problems with the weather and especially the wind. Come on down and enjoy yourselves. I've lived here for 10 years and love it.
Please do us a favor and write a trip report in the "Trip report" forum when you get back home. Anymore questions then don't hesitate to ask as that is why we are here.
Rick
Did a search and came up with this for you;
Punta Cana-Bavaro Weather Report
Pages 28 - 29 and pages 65-66
Sorry Frog I didn't see that you had already posted the link