June marks the height of the northern migration with up to 30,000 humpbacks predicted to pass the coastline on their journey to warmer waters to give birth.

They will then head back southwards, many with their newborn calves, during spring from September through to November, travelling at a much more leisurely pace.

Meanwhile, the Organisation for the Rescue and Research of Cetaceans in Australia (ORRCA) has locked in June 28 for the annual whale census.

Held at peak migration time, volunteers will monitor headlands and key whale spotting sites along the east coast to count the number of whales on the move north.

With over 30,000 whales predicted to be currently migrating along the NSW coastline, NSW National Parks and Wildlife Service (NPWS) is encouraging everyone, when restrictions are eased, to visit coastal national parks for some of the best vantage points to spot these majestic ocean giants.

Humpbacks and southern right whales are the most commonly sighted, however minke, false killer whales and orcas may also be spotted.

Tacking Point Lighthouse, Rocky Beach lookout, Town Beach lookout, Port Macquarie's coastal walk, Grants Head and Perpendicular Point are common whale watching vantage points in the Hastings.

NSW National Parks and Wildlife Service recommends these top whale watching spots:

Charles Hamey lookout, Kattang Nature Reserve - This clifftop lookout offers magnificent coastal views across Dunbogan Beach and around to Diamond Head. Pack binoculars for great whale and birdwatching. Perpendicular Point walking track in the Reserve also offers spectacular coastal views.

Caption Cook's lookout, Hat Head National Park - Located beneath the Smoky Cape lighthouse near Kempsey, this is a great place to spot whales, enjoy a picnic and take in the amazing South West Rocks views. Experienced walkers can tackle the 10km (one way) Little Bay to Smoky Cape walk for whale spotting along the way.

Cape Hawke lookout, Booti Booti National Park - Just five minutes from Forster, the Cape Hawke lookout offers spectacular 360-degree views along the coast from the top of a dedicated tower, perfect for whale watching.

Trial Bay Gaol, Arakoon National Park - Close to South West Rocks, Arakoon National Park provides plenty of headlands and foreshores to spot passing whales, as well as great picnic spots near the historic Trial Bay Gaol. Spot mother whales and their calves in the calmer waters of Front Beach during the southern migration (Aug-Oct).

Whale watchers can download NPWS' free Wild About Whales mobile app to find the best vantage point and get real-time notifications of nearby sightings.

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