What's the weather like mid-April? Day & night temps? I'll be staying at the Blue Lagoon (Yasawa Islands) in the Garden Villa with no A/C and wondering if I'll sleep through the night. Thanks!

Check TA reviews. Under "time of year" check "Mar-May". Then in the space asking for "Show reviews that mention" enter "air conditioning". There's quite a range of opinion among the April reviews. Some people mention being okay with the fans, others mentioned needing to sleep with the windows open, other people mention not being able to sleep because of lack of air conditioning.
https://www.tripadvisor.co.nz/Hotel_...a_Islands.html