Willamette, McKenzie & Santiam Rivers Fishing Report for July 1st Posted on June 30, 2016 by Michael Teague Lower Willamette water temperature is, has been and will be in the 70-degree range. Yep,... This post is only available to Members. If you are a Member, please be sure to log in and remember to select the Remember Me option. If you want to become a member or find out more, take a look here.