Hi Yabbie,

Not sure myself - I've had real consisent days at Leighton, and shocking gusty days as well? Usually depends on how well I've got my gear rigged!

Did you see the other weekend where Safety Bay had the breeze in at 11am, and it didn't kick in at other spots until hours later? .. crazy thing was it appeared to reverse a few days later - early at Ocean Reef, later at Safety bay - go figure!

Enjoy .. Laurie

p.s. Anybody checked out the new "wide mouth" yesterday graphs - full 24 hour charts

oh, forgot to add. The example of comparing water to air is that it is to add a better visual of what is roughly going on.
A seabreeze is created by the differential heating rates of land and sea under conditions of strong incoming solar radiation (ocean temperature only changes by about 1 degree celcius between day time and night time, high specific heat). The warmer air above the land expands and rises, thus there becomes a pressure differential between land and sea. The cooler air over the sea moves in to replace the rising air over the land.
Now, if we take Leighton beach and your theory of the river interferring we can see that the air over the river will not be heated as much as the air over land either side of the river. This surely would have to affect the type of sea breeze we are going to get? This is only a theory... like I said, I will try and get back to you with a better explanation.
Cheers