temps can be the trigger to feeding activity foor some fish,as jb said 18 deg c is the magic number in nz,in oz the research shows this the magic number that triggers breeding so maybe the feeding frenzy is something to do with that.Others just have temp ranges they feel more comfrtable in,eg some tuna and mackerals in the 20 deg plus,barra 24deg plus .
the temp can govern what baitfish are around as well,best bet is keep a diary and see what patterns emerge over a period of time.