Cyclone categories in Australia and why caravans go first

Australia ranks tropical cyclones from Category 1 to 5 by their maximum mean wind speed: a Category 1 averages 63 to 88 km/h with gusts up to 125 km/h, and a Category 5 averages more than 200 km/h with gusts above 279 km/h. Even a Category 1 already damages caravans, and the category says nothing about rain or flooding, which a weak cyclone can still bring. The season runs mostly from November to April, so a summer trip to Queensland, the Top End or northern Western Australia sits inside it.

Two different alerts reach you at the same time: the Bureau of Meteorology’s cyclone watch and warning for the coast, and the state emergency service’s Australian Warning System message telling you what to do. Here is how both work, what each category does, and what to change if you are travelling by campervan or flying out.

The five Australian cyclone categories, explained

The Bureau grades cyclones by maximum mean wind speed and describes the damage each one does. Its own descriptions are blunt, and caravans appear in four of the five:

The Bureau adds a warning of its own: the category “doesn’t indicate the severity of other hazards the cyclone may bring”, and a Category 1 can have significant impact through heavy rain and flooding. For a road trip, the flooded highway after a weak cyclone can strand you longer than the wind.

Why an Australian Category 1 is not a US hurricane

The two scales start at different speeds and measure the wind differently. Australia’s Category 1 begins at a maximum mean wind of 63 km/h. The US Saffir-Simpson scale only starts at 119 km/h (74 mph), measured as a one-minute average, which is the point a storm becomes a hurricane. Some pages online give Australian categories in the US speed bands, or mix up gusts and mean winds. Use the Bureau’s figures for an Australian storm, and see our guide to hurricane watches and warnings for the US system.

Cyclone watch vs warning in Australia

A watch means the cyclone is expected to affect coastal communities within 48 hours but not within 24; a warning means it is affecting them or expected to within 24 hours. Before that, the Bureau issues an information bulletin when a cyclone is active in the region but not expected to affect communities within 48 hours. Its warnings come from three Tropical Cyclone Warning Centres, in Perth, Darwin and Brisbane, and cover the mainland coast plus Christmas Island, the Cocos (Keeling) Islands, Lord Howe Island and Norfolk Island.

Alongside the Bureau, state and territory emergency services issue Australian Warning System messages, which are about what you should do:

• Advice (yellow): an incident is active but there is no immediate threat to lives or homes. Stay up to date.
• Watch and Act (orange): a possible or heightened threat. Take action now, for example prepare to leave, or move and stay indoors.
• Emergency Warning (red): you may be in danger and need to act immediately, for example leave now or take shelter now.

Western Australia moved its cyclone messages onto this system on 15 July 2024 and no longer uses the old Blue Alert, Yellow Alert, Red Alert and All Clear. Older guides that tell you to wait for a “red alert” in WA are out of date.

Travelling by caravan or campervan in cyclone season

Leave the caravan park at the watch, not the warning. Every category from 1 to 4 lists caravan damage, and a vehicle you sleep in is no shelter from the wind or from flying debris.

• Know where the cyclone coast is. Cyclones develop over the tropical waters around northern Australia, mostly from November to April, and the Bureau warns from its centres in Darwin, Brisbane and Perth.
• Move inland or into solid accommodation early. Roads can close with flooding, and the Bureau stresses that rain and flooding come with weak cyclones too.
• Follow the state service, not the category. A Watch and Act or Emergency Warning for your area is the instruction to act, whatever the number on the news.
• Check your hire agreement and insurance. Find out whether your campervan cover excludes cyclone or flood damage, and what the company wants you to do with the vehicle in a warning.

What a cyclone means for flights in Australia

Australia has no fixed delay payout, but if a cyclone means the airline cannot get you there in a reasonable time, the Australian Consumer Law can entitle you to a refund or a replacement flight. As our guide to Australian flight cancellation rights explains, ask for the refund in writing, because a travel credit is the airline’s preference, not your entitlement. When the cause is outside the airline’s control, what you get also depends on your fare conditions, and travel insurance is usually what pays for the extra hotel night.

Our verdict

Do not be reassured by a low number. A Category 1 still damages caravans and can flood the roads you need, and the category says nothing about rain. Use the Bureau’s watch as your cue to move, the state service’s Watch and Act or Emergency Warning as your instruction, and a written refund request if your flight is cancelled.

Planning travel in other seasons and countries? We decode the UK’s yellow, amber and red warnings, tsunami alerts in the US, Japan and Indonesia, and the US beach hazards statement the same way.

Frequently asked questions

Keep reading

Sources: Bureau of Meteorology, Tropical cyclone categories (Tropical Cyclone Knowledge Centre) and Tropical Cyclone Warning Services; Australian Warning System level definitions from the WA Department of Fire and Emergency Services and the NSW Government; DFES on the end of WA’s blue, yellow and red cyclone alerts (15 July 2024); National Hurricane Center glossary, for the US hurricane threshold; ACCC flight guidance as summarised in our Australian flight rights guide. All read 4 October 2026.

Photos via Pexels: Marie-Claude Vergne (cover), Eclipse Chasers, Kellie Jane.