Roka? My affiliation to Roka is that they have supported my coaching business since they launched the brand. That's it ... ... I don't care if athletes wear a wetsuit, speedsuit, budgy smuggler, tri kit etc. ...
The weather this year is similar to last year, as would be almost any year. You mention official sites? The are no official sites unless you want to consider the one with "Estimated Temp" as official? There are fishing sites where they say recent temp is 75-76 (who knows where the water temp was taken)
All I can tell you is last weekend it was 77 degrees on the swim course. My advice to athletes is be prepared for water temp near the limit and possibly over. If we have a number of windy days as well as marine layer over the lake the water temp will drop (its a big lake with COLD water down deep) ... the opposite will drive the temp up. All I know living here is what the weather is like, what the trends are and how they effect race day (water temp, air temp, wind direction, speed etc.) as well as trying to provide insight to that. Nobody has to believe it ;-)
BTW ... water temp on race day in mid May was 67 degrees if I remember correctly
EDIT ... If I get anything official before THURS i will post here
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Dave Latourette
http://www.TTENation.com