The west coast is almost an any season time for whale sighting.....but I'm sure there are more peak times than others.
I remember driving past an area a few minutes from home, and spotting a pod of whales. Traffic (as small as it was) came to a standstill, and everyone had cameras, binoculars and camcorders out. We actually followed them all the way down island. We'd drive for a bit, then pull of the highway to the beach and wait and watch as they caught up.
The baby whale had got himself turned around....and the pilot whale was relentless in trying to guide the little guy back into the pod. It was so dramatic. The pod doesn't wait....and it was like watching a cliff hanger to see if they caught up with the pod. We followed it for over an hour and a half. It was truly a most fabulous event.