FoS,
Gestalt used this site
http://forecasts.bsch.au.com/gfs_plot.html# prior to Burrum this year . You can set it to whatever parameters you want e.g. 1knot gradients, latitude , longitude etc. Found it to be really accurate (well as accurate as forecasting goes anyway) and gives you 7 days forecast at minimum +/-3 hour or max +/-24 hour intervals.
Hit the "winds + Streams" in the quicklinks just below the "GFS Forecast run" bar, then in "Variables" row put your preferred wind gradient in far right box (it's default is in 5 knot gradients but I set this to two as you get a much more colourful picture

). Then in the "Map Projection" set lat/lon co-ords in of region you want, then hit "request plot".
This is the BoMs one I occasionally use as well although clarity/flexibility not as good as above.
www.bom.gov.au/jsp/marine/wind/index.jsp