A friendship that only takes place during summer months due to various reasons. At the end of the summer, the two parties either depart and usually not see each other again, or stop being friends. It is the friendship equivalent of a summer romance.
Bryan and I saw each other a lot during the summer and formed a summer friendship. However, he was forced to go back to his home town in Connecticut.

During the long summer months, I quickly befriended Judy, and we began our short lived summer friendship. Towards the end of the summer we began to realize that we would not normally be friends and ended our summer friendship.
by Rizuko August 18, 2010
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