First of all it's not fair to tell us how great a time you're having while we are at work.
If you were getting 2ft waves in front of the Weirs and they were not boat wakes, then it was a windy day. If the waves were coming from Meredith (North) then the broads were probably messy. Winds from any northerly direction tend to make white caps on the broads. Check the weather link on this site it give wind speed and direction. Also check the webcams like this one
http://www.rattlesnakecam.com/
Looking now it does seem too bad, a little choppy but no white caps.