We've just returned from 3 months cruising, Brisbane to Whitsundays and return. A fantastic time as always. We have been cruising this area for 10 years, but this time in particular I was amazed at the number of whales seen, sometimes much too close for comfort. The biggest numbers were during our return trip (the last fortnight), with particular hotspots between the Percies and Keppels, and then further south between Mooloolaba and Moreton Bay.

Despite keeping a lookout, on a number of occasions we first saw them within a couple of boat lengths; and at least twice there probably would have been a collision if we had not altered course. This seemed to mainly happen while we were sailing - I'm pretty sure they're more likely to hear you when motoring, and keep out of your way.

The numbers transiting the east coast have been increasing at around 10% per year with no sign of reaching a limit, and currently stand at about 25,000. The northern migration is usually June/July to August, and the return is from September to November.

Given our close encounters this year, and the damage one of these animals could do if it reacted violently to a collision, sailors are advised to keep a keen lookout. And we won't be traveling at night.