we were in Kriti for the end of the season this year, day temps very pleasant, cardi needed for the evenings, expect 1 1/2 days rain per week we were lucky all ours came over night and was dry by 10 am

wizard

If you go to Spinalonga, go on a guided trip, if not, you'll wonder what it's all about.

taking into consideration this has been the warmest winter ever i cant say for sure how it will be. the weather is changing like crazy
in general its a good weather with possible rain depending on the year.
for example this year it was raining the first days but at the end of the month it was sunny again and it moved on like that till about x-mas.
so based on general weather as it has been so far i would say go for it.
regarding spinalonga i will agree with parky