Byron Bay Julian Rocks Snorkelling Tour

Brunswick Heads: the harbour where the boat departs

Brunswick Heads is a quiet river town about 15 minutes north of Byron Bay, where the Brunswick River meets the sea between a long surf beach and a sheltered estuary lined with pelicans and fishing boats. The snorkelling boat leaves from the harbour at 43 Harbour Way, on the river a short walk from the town's main street. There is parking nearby and a bus from Byron Bay, but a taxi or car is the simplest way to arrive for the early departures.

You check in at the harbour, sign the paperwork and are fitted with a wetsuit, mask and fins before boarding. The guide gives a briefing on the boat about the site, the animals you are likely to meet and how to behave around them, especially the rule of never touching or chasing turtles and rays. The departure through the river mouth is the start of a scenic ride down the coast.

The boat ride along the coast to Julian Rocks

From the river mouth the boat turns south and runs along the coast for about 20 to 25 minutes, with the beaches of Brunswick Heads and Byron Bay on one side and the open Pacific on the other. Ahead, the forested bulk of Cape Byron and its lighthouse grow larger, and Julian Rocks appear as a group of dark islets about 2.5 kilometres offshore. Dolphins often ride the bow wave, and from June to November humpback whales pass this stretch of water.

The crossing can be bumpy on days with swell, so take seasickness tablets beforehand if you are prone to it; the ride is short and the water at the rocks is usually calmer on the sheltered side. The boat moors at the sanctuary and the guide checks conditions before everyone goes in. The same ride brings you back to Brunswick Heads at the end of the session.

Julian Rocks, Nuthungulli: the marine sanctuary

Julian Rocks are the eroded remains of an ancient volcanic flow, standing in the sea off Cape Byron and protected as a sanctuary zone within Cape Byron Marine Park, with no fishing permitted. To the Bundjalung people the rocks are Nuthungulli, a place of cultural significance long before the first divers arrived. What makes the site exceptional is its position at the meeting point of the warm East Australian Current and cooler southern water, so tropical and temperate species share the same reef.

Below the surface the rocks drop into gutters, boulders and sandy patches at depths of 5 to 20 metres, with the shallow areas ideal for snorkelling. Visibility is often 10 to 20 metres, best in the cooler months. Snorkelling Julian Rocks is consistently ranked among the best marine experiences in Australia, and the sanctuary status means the fish are dense and unafraid.

Turtles, rays and sharks: what you see through the season

Green, loggerhead and hawksbill turtles live around the rocks all year and are seen on almost every tour, grazing on the reef or rising to breathe beside the snorkellers. Eagle rays and bull rays glide over the sand, wobbegong sharks lie camouflaged on the bottom, and schools of kingfish, trevally and sweetlip move through the gutters. The marine biologist guide identifies species as you go and explains their behaviour back on the boat.

The seasons change the cast. From about December to May the water is warmest and harmless leopard sharks, spotted bottom-dwellers up to 2 metres long, rest on the sand, while manta rays sweep through in summer. From May to October the cooler water brings grey nurse sharks, which look fierce but are placid and stay deeper, and visibility is at its clearest. Whales pass the site from June to November.

Snorkelling and freediving with a marine biologist

The session is guided throughout: the guide leads a loop around the sheltered side of the rocks, points out animals, keeps the group together and helps anyone who wants a hand with mask or fins. Experienced freedivers are welcome to dive down along the boulders, while beginners stay on the surface in the clear water; the wetsuit provides warmth and buoyancy. Expect roughly an hour in the water, depending on conditions.

Children who are confident swimmers and comfortable in open water can join, with an adult beside them; the guide will advise on the day if the swell is too much. Bring swimwear, a towel and sunscreen, and leave valuables behind. If you are wondering whether Julian Rocks is worth it for a snorkeller rather than a diver, the answer is yes: the turtles and rays are mostly in the shallows, and the biologist's commentary makes the trip.