I must be misunderstanding what the numbers are on these two sites. Look at Melbourne for example tomorrow on SeaBreeze:
www.seabreeze.com.au/maps/vic.asp (up to 23kn)
Then the same on WindGuru:
www.windguru.cz/208658 (up to 13kn)
Are the differences just that they're taking data from different sources, or am I fundamentally misunderstanding what the forecasts are showing? What's generally the most reliable place to look?
.....
What's generally the most reliable place to look?
Out of the window
Weather forecasting seems to be an art, not a science.
Three most important rules with the forecasts are :
No matter what the forecast is the actual conditions are inversely proportional to your work commitments
The forecast is always better the further out it goes
If you don't like the forecast look for another, there will be one somewhere saying what you want it to
LOL. Ok, so basically you don't really know for sure until the day :)
Use them as a guide. Seabreeze is reasonably accurate.