The Buzz Blog at the APS Physics Central has a very interesting statistics on popularity of the word "physics" on Google search, and it showed a prominent pattern of large, yearly dip in July!
July is the least popular month for physics, marking the bottom of a decline that starts in May. This is not really surprising given that schools in the Northern Hemisphere tend to finish in May or June, and that July is the most popular month for vacations for Americans. Physics is definitely an academic term and it makes sense that its popularity aligns with students and researchers working to the academic calendar. Other academic terms such as "literature", "economics", and "math" also have minimum online interest during July. "Surfing", on the other hand, has a peak interest in July.
This means that right now, the date that this blog entry is posted, is the beginning of the downtrend. I won't blame you guys if the number of hits and read of this blog takes a strong dip starting now! :)