‌

Fascinating facts about Hervey Bay’s Humpback whales you must know

Humpback whales are among the most observed and researched animals on the planet. They are massive, intelligent, and impossible not to marvel at. If you're a marine life enthusiast exploring Australia’s east coast, you're in for something special. This entire stretch forms part of the famed Humpback Highway, with stopovers like Sydney, the Gold Coast, Jervis Bay and most notably, Hervey Bay. What sets Hervey Bay apart? It’s a designated Whale Heritage Site, where thousands of humpbacks pause to rest, socialise, and nurture their calves in its calm, protected waters. Curious to learn more about Humpback whales? Read this article to know some interesting facts about these giants of the ocean.

Why Humpback whales love Hervey Bay

Visitors descending sand dune towards Lake Wabby on Fraser Island, K'gari.
Aerial view of a boat near whales in Fraser Island waters, K'gari.
Whale breaching near tour boat with tourists on Fraser Island whale watching trip.
1/3

A natural resting place mid-migration

Sheltered from strong ocean currents and winds by K’gari (Fraser Island), Hervey Bay’s calm, shallow waters offer migrating humpbacks a safe pause mid-journey. Mothers use this protected space to rest, nurse their calves, and socialise in peace. It’s one of the only known places on their migration route where they slow down and settle in for a while.

Whales linger longer here

Unlike other locations along the coast where whales might glide past, here they hang around. For days or even weeks. That means you have better chances of seeing tail slaps, spy-hops, and group interactions.

Calm waters, close encounters

The bay’s geography makes all the difference. The water is still and warm making it not only safe for humpbacks but also for humans. Add in crystal-clear views, underwater acoustics, and full-body breaches? You’re in the front row for nature’s best.

Fascinating facts about Humpback whales

They make the longest migration on Earth

Humpback whales travel nearly 10,000 km each year migrating from the icy waters of Antarctica to the warm shallows off Queensland. This epic seasonal journey is all about breeding and birthing in safer, temperate zones. Hervey Bay sits right along this “Humpback Highway,” making it one of the best places in the world to catch them mid-voyage.

They’re huge but surprisingly graceful

We’re talking 40 tonnes of muscle and up to 16 metres in length. To put it into perspective, that’s about the size of a city bus or a bowling lane yet they launch themselves out of the water like it’s no big deal. In Hervey Bay, you’ll often spot them breaching, tail-slapping, and spyhopping.

Humpback whales are also known for their beautiful songs

Only male humpbacks sing, and those complex, hypnotic whale songs can travel up to 30 km underwater. Each region has its own “tune,” evolving slowly over years. You won’t hear this from land, but on board a Hervey Bay cruise, hydrophones let you tune into the underwater symphony live.

Another interesting fact: Humpback whale songs were included on the Voyager 1 spacecraft's Golden Record as a message from Earth to the cosmos.

Their parenting game is strong

Hervey Bay is a kind of nursery for mothers and calves. Calves drink up to 400 litres of milk a day, while mums rest, protect, and teach them essential survival skills in the bay’s calm waters. That’s why you’ll often see slow, close interactions here especially between August and October.

They’re incredibly curious about you too

Humpbacks are social, intelligent, and believe it or not curious about boats. They’ve been known to come right up for a closer look, especially younger ones. This behaviour is called mugging, and when it happens, vessels must pause and wait until the whale decides to move on.

They feed with bubble nets (like a team sport)

Humpbacks don’t have teeth. Instead, they scoop up krill and tiny fish using plates called baleen. What’s cooler? Some whales work together, blowing bubbles in spirals to trap their prey in a “bubble net.” It’s cooperative hunting and it’s as strategic as it is spectacular.

That misty puff? It’s a whale breathing out

Look for a misty column rising from the water. That’s a whale’s blow. Humpbacks exhale with serious force, sending a 5-metre-high spout of vapour into the air. If you’re scanning the horizon in Hervey Bay, spotting that iconic puff is your first clue you’ve found a pod.

They almost went extinct, but thanks to conservation efforts

Once hunted to near extinction, humpback whale numbers dropped drastically in the 20th century. Thanks to conservation efforts, they’re making a comeback, with around 80,000 worldwide.

They’re not always alone

Humpbacks often travel in small pods and even interact with dolphins and other marine life. In Hervey Bay, that means your cruise might include surprise visits from bottlenose dolphins, turtles, or sea birds flying overhead.

What you’ll see Humpback whales do at Hervey Bay

Two humpback whales breaching from the ocean during a Hervey Bay whale watching tour.

Breaching

This is perhaps the most dramatic sight of all. Humpbacks hurling their entire 40-tonne bodies out of the water before crashing down in a thunderous splash. Scientists believe breaching helps them communicate, dislodge parasites, or simply play.

Whale tail breaching water near Fraser Island, K'gari, during whale watching tour.
Whale breaching in the waters near Fraser Island, K'gari, during a whale watching tour.
Tourists on a ship watching a whale near Fraser Island, K'gari.
Humpback whale breaching during a whale watching cruise.