Best time for visiting Galapagos

My sister and I have decided to go to the Galapagos together sometime this year or next year, and while we can hardly wait, we do want the weather to be great. So if you have any experience then it would be great if you can tell me what the best time of the year would be to go there.

We went there in April a couple of years back and the weather was pleasant. It was not too warm yet, and we could go and do our thing without worrying about being overwhelmed by the weather, and not knowing what to wear ... For me, it was a great time to go in any case.