Seems wack? surely it hasn't been 10-15kts there all day.
What wind meter do most people rely on who sail around the bay? And whats your mental calculation?
RQYS seems to be bang on mostly, but can be down at times
www.rqys.com.au/weather-station/ I did think that the Brisbane airport one was pretty good, but maybe only in a northerly and its sheltered in a southerly blow? Cape Moreton is usually crazy optimistic... Not really sure about Banana Bank and Inner Beacon, they tend to read about 5kts high I think.