I found the following helpful sites:
Colour Lovers is a site that is extremely helpful in finding new trends in color. I have to say that I love the colors in this snapshot, and will definitely be visting their site often.
They even have a way that you can search the most loved and most viewed color palettes. This could be SO helpful when choosing colors for your next project.
I also found a site called trendhunter.com. I had a little bit of trouble figuring wout how to navigate this site - there is a lot going on. But once you do, it could be a great resource. You could discover trends like the below photo - which is supposedly going to become a new "thing". How you will apply this to your real life - I am not sure.
Another great and helpful site is called ThisNext
I looked up upcoming art trends ofcourse. Very interesting.
is also a great site - giving a list of the most popular tags.