Flu vaccination

So... I think I have decided to have the flu vaccination after researching etc BUT I would like to get it when I am a little further on. I am 16 weeks 2 days, when do you think is best to get it? Obviously I don't want to leave it too late but it is getting colder. I am going away for the weekend on 2nd Dec and don't really want to get it that week incase it makes me feel a bit rubbish for my holiday. So should I get it before then or after my holiday?