Good stuff!

We'll usually see the first albacore somewhere between mid may - mid june.
Each season varies from there depending on temperatures, but the albacore tend to be replaced by yellowfin as the water warms going into august & will last through oct. Usually including varying quantities of dorado (dolphin) & striped marlin.

You can count on Yellowtail (very similar to amberjack) under the offshore kelp paddies from may through nov.

http://www.swimbait.com/techniques/tuna.htm

Josh