I was on Cape Verde,Boa Vista last year from 28.3-10.4. Water has 22-23 degrees,air 20-25 degrees,but the best part is wind,you dont have to worry will it be wind or not
It is around 15-20knt every day non-stop from november till june
You need shorty and sun creem,because sun is very strong
Apartments are on booking.com and we flue with Tuifly from Munchen.
The food is good in restorans,you can buy everything in local shops...
Flat and wave is on main beach of city Sal Rei(sideoffshore wind) ,wave on other side of the island-wind onshore(need taxi 30-40eur or rent-a-car 55eur).
For me is better then Egipt,not so touristic,people are good,wind all the time and waves!