Windfinder still producing accurate readings.i use it all the time for North Haven and Airport wind speeds. Not sure from where or how but this afternoon the app had 23knots showing for NH which for me, a heavy fella, is 4.5m weather. It was spot on!
FYI
16-17 I'm on 6.2 or slalom gear
18 -19 I'm on 5.5
20-21 I'm on 5.0
22-24 on 4.5
25 + on 4.0
Actual wind readings with accurate speeds I find fairly irrelevant. I just need something that produces consistent data to educate my sail choice. Generally speaking this app is reliable for that.