Hello, Vojeda,
April and May are in our Autumn here in the Southern hemisphere, so we expect the winds to be light. I live in Melbourne, Victoria and usually there will be minimal winds, as shown on these old graphs:
April:
www.baywx.com.au/fbeacon.APR.htmlMay:
www.baywx.com.au/fbeacon.MAY.html(but this year defied all the stats and it was extremely good).

Can???t speak for other states in Australia or NZ, but perhaps others will reply.
Hope this helps.