Whitsundays snorkeling

Guide to Stinger season safety in the Whitsunday

From November to May, warm tropical waters bring box jellyfish and tiny Irukandji into the Whitsunday shallows. Their stings can hurt and, in rare cases, be dangerous. But strict safety measures mean serious incidents are uncommon.

Tour operators provide full-body Lycra suits, run safety briefings before each swim, and keep vinegar close to the ladders. Onshore, most beaches set up stinger nets and display warning flags showing daily risk levels. Medical help is also nearby—clinics in Airlie Beach and Hamilton Island carry antivenom, and rescue helicopters can respond in under 20 minutes.

Key stinger facts

Season dates (November 1 – May 31)

Northern trade winds warm shallow bays above 26°C, making it easy for jellyfish to breed. Most jellyfish are seen from mid-December to early March. After that, as the winds change, the number decreases. Stings are very rare outside this season, but crews still carry vinegar all year.

Main culprits

There are two important jellyfish: the small Irukandji and the larger box jellyfish. Irukandji is about the size of your thumb, while the box jellyfish can have tentacles over three meters long. Both are see-through, so wearing Lycra is your best protection, not just being careful.

Where risk is highest

Protected bays and mangroves on the mainland have the most jellyfish. Outer-reef pontoons are in deeper, faster water and have fewer jellyfish. Operators change snorkel platforms based on daily checks.

Staying safe in the water

Lots of people snorkel in the Whitsundays every day, even during stinger season, and most have no problems at all. Stingers prefer warm, shallow, and calm water, so it’s safer to swim at deeper reef sites or in netted beach areas. Wearing a Lycra suit almost removes the risk, while also protecting you from sunburn and keeping you warm in the water.

Tour crews are always ready too. They watch the water from the platforms, carry vinegar for stings, and explain safety rules before you get in. The main thing to remember: never use freshwater, ice, or alcohol on a sting—it makes it worse. Only use vinegar. If you are stung, stay calm; the pain usually subsides within half an hour, and hospitals have effective treatments available if needed.

Easy Safety Tips

  • Cover up: Wear a snug Lycra suit or thin wetsuit. Make sure hoods, sleeves, and cuffs stay in place while you swim.
  • Swim inside nets: Beaches like Airlie Lagoon and Boathaven Bay set up stinger nets from November to keep swimmers safe.
  • Pay attention to crew talks: The crew will explain the risk level and how to get in the water safely.
  • Use vinegar only: Vinegar stops the sting instantly. Boats always have bottles on board. Know where they’re kept.
  • Speak up quickly: If you feel unwell after a sting (like back pain, nausea, or feeling anxious), tell the crew straight away so they can help.

Pro tips for a worry-free swim

Book outer-reef tours for fewer stingers

These are set up about 70km from shore in cooler, faster waters where box jellyfish are rarely found. Operators still provide suits, but chances of stings are much lower here, so you can enjoy the reef without worry.

Pack your own 2mm suit

Packing a snug Lycra suit saves time waiting for rentals and ensures the right fit. They’re light (under 500g), easy to carry, and also help keep you warm on winter dives.

Choose morning snorkels

Jellyfish usually drift closer to shore in the afternoon. Going before lunch means calmer water, better visibility, and great photos.

Stay inside Net Zones

If you’re not on a tour, choose beaches like Catseye or Boathaven. Swim between the red-and-yellow flags, follow lifeguards, and use stinger nets for extra safety and quick first-aid if needed.

























































Frequently asked questions about stinger season and safety

Do Lycra suits really prevent stings?

Yes. The suits create a physical barrier, and the slick fabric prevents tentacles from latching onto skin.

Is it safe for kids to swim during stinger season?

Yes, but only if they wear properly fitted suits and stay within netted areas or under direct crew supervision. Children’s sizes are generally available on all tours.

Can I rent a suit on the islands?

Most resorts and every tour boat supply suits free or for a small fee per day. For multi-day trips, buying a suit can be cheaper and ensures a correct fit.

What should I do if I’m stung?

Alert crew or lifeguards, pour the stung area with vinegar, remove tentacles with gloved hands or tweezers, and stay still. Severe pain, nausea, or breathing issues warrant immediate medical evacuation.

Are stingers present outside November–May?

Sightings are extremely rare in the dry season but not impossible. Operators carry suits and vinegar year-round as a precaution.

Does travel insurance cover stinger incidents?

Most comprehensive Australian policies include medical treatment and evacuation for marine stings. Verify coverage limits and ensure activities like snorkelling aren’t excluded.

Whitsundays snorkeling
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