Getting weather information for your hikes
Weather is not background information. It directly influences route choice, river crossings, clothing systems, hydration strategy, fire exposure, and your ability to turn around safely. Forecasts and warnings are decision tools. Used properly, they allow you to adjust plans early rather than react under pressure.
Within the Trail Hiking Australia Hiking Safety Systems, weather interacts with Navigation and Positioning, Hydration and Fuel, Decision-Making and Judgement, Environmental Awareness, and Equipment Reliability. Understanding how to interpret weather information is a core self-reliance skill for anyone undertaking land-based outdoor activities such as hiking, bushwalking, and camping.
Seasonal context comes before the forecast
Before you even look at a short-term forecast, it helps to know the typical climate of wherever you’re heading, because that seasonal context is what shapes your clothing system, water capacity, start time, and route selection long before a forecast enters the picture. Conditions vary year to year, but knowing which months are commonly hot, cold, wet, dry, windy, or prone to storms gives you a sense of your risk exposure before you’ve even committed to a date. The Bureau of Meteorology provides historical climate data and averages at bom.gov.au.
Where to get reliable information
Once you have that seasonal picture, the next thing is knowing where to actually get reliable, current information, because seasonal averages only tell you what’s typical, not what’s happening on your date.
- Use the Bureau of Meteorology website (bom.gov.au) or the BOM Weather app as your primary source.
- Know where to find weather warnings and understand the type and severity of phenomena covered.
- Learn how to use MetEye. Its three-hourly forecasts are useful for identifying timing windows for heat, wind shifts, rainfall, or storm activity, especially in remote areas.
- Identify nearby Automatic Weather Stations and relevant rain radar via the state or territory pages.
- You can check the local weather on any trail on this site by scrolling to the weather section on each trail details page.
Reading pressure systems yourself
Forecasts and warnings tell you what’s expected, but there’s real value in reading the weather map underneath them too, because that’s what lets you notice a system moving faster or slower than forecast, or spot a change building before the next update comes through.
Weather maps show pressure using isobars, lines connecting points of equal pressure, and how closely they’re spaced tells you about wind strength. Isobars packed tightly together mean a steep pressure gradient and stronger winds. Isobars spread wide apart, especially near a high, mean lighter winds. This isobar-spacing rule holds well across most of the terrain Australian hikers cover, though it becomes less reliable in the tropics, where pressure gradients are generally weak.
Wind doesn’t blow straight from a high to a low. The rotation of the earth deflects it so it flows roughly parallel to the isobars instead, spiralling outwards from highs and inwards towards lows. In the Southern Hemisphere, that means wind circulates clockwise around a low and anticlockwise around a high. A useful field trick follows from that: if you face directly into the wind, the low pressure system is on your left, and since Australian weather systems generally track from west to east, a strengthening northerly is often your first sign that a change is approaching.
Cold fronts aren’t all the same either. Forecasters recognise a classification for southeast Australian cold fronts specifically: a deep, fast-moving front that lifts unstable air quickly, bringing a short, sharp burst of showers, thunderstorms, and gusty wind changes, and a shallower, slower-moving front that lifts stable air over a wider area, bringing rain that sets in for longer. High cirrus cloud streaming in from the west, well ahead of the main cloud mass, is often an early visual sign that either type is approaching. This classification applies specifically to southeast Australian systems, and it’s less useful if you’re hiking in tropical or northern regions, where fronts behave differently.
Monitoring the forecast as your trip gets closer, and once you’re out there
Start monitoring forecasts up to seven days before your hike, then check more often as the date approaches. Forecast confidence generally improves closer to the event, but localised phenomena such as thunderstorms can stay unpredictable in both timing and location right up until they happen, which is exactly where weather feeds into decision-making and judgement. If severe wind, heatwave conditions, flooding, or storm activity are flagged, that’s your cue to reassess exposure: think about terrain type, bailout options, river crossings, ridge travel, and treefall risk.
- Watch for hazard mentions in forecasts and formal warnings.
- Monitor heat using the Bureau’s Heatwave Service between November and March.
- Check river conditions and flood advice where crossings are involved.
- Review fire danger ratings, total fire bans, and hazard reduction burns through your state or territory fire service.
- Check the UV Index and plan sun protection when it is 3 or above.
That assessment doesn’t stop once you leave the trailhead, because conditions can deteriorate quickly, particularly in alpine areas, exposed ridgelines, dense forest, and river valleys.
- Monitor updates via the BOM website, app, or radio where available.
- Treat warnings as decision points, not the start of risk. Reassess objectives rather than simply noting them.
- Observe cloud development and wind shifts. Visual awareness complements digital forecasts.
- Consider “apparent” temperature as it affects fatigue, hydration demand, and cold stress.
Quick guide: Weather hazards
The table below summarises common weather hazards and their operational impacts on hikers. Use it to connect forecasts to real-world consequences.
| Hazard | Potential impacts |
|---|---|
| Cold temperatures | Hypothermia, particularly when combined with wind (wind chill). Ice may form on tracks, roads, and equipment, making their use difficult. |
| Fire weather and bushfires | Injury or death from the fire or its radiant heat. Respiratory problems from smoke. Destruction of infrastructure and equipment (such as huts and tents). |
| Fog and low cloud | Reduced visibility of reference points makes navigation difficult. White-out conditions and disorientation can occur when combined with a snowy landscape. |
| Heavy rain and flooding | Water levels in creeks, rivers, and canyons can rise quickly. Areas may become inaccessible, or equipment washed away. Slippery terrain increases accident risk. |
| Heavy snow or blizzards | Reduced visibility of paths, signs, and hazards makes navigation difficult. Increased risk of hypothermia. Deeper snow is physically taxing to walk through. |
| High temperatures and heatwaves | Heat exhaustion and dehydration, especially when undertaking physical activity. High night-time temperatures makes it difficult to recover from heat exhaustion. |
| Strong wind and gusts | Falling trees or limbs may cause injury or death. Damage to infrastructure and equipment. Progress may be slowed when walking against the wind. Increased wind chill. |
| Thunderstorms | Injury or death from lightning strike, particularly at high points, ridges, and exposed places. All thunderstorms produce lightning regardless of severity classification. Lightning risk is present whenever thunder is heard, not only when a warning is issued. Debris, injury, or damage from wind, large hailstones, or flash flooding. |
| Tropical cyclones | Injury or death from destructive winds, heavy rainfall, and storm surge. Widespread disruption and damage to infrastructure. |
| UV radiation | Sunburn, and longer-term eye damage, premature ageing, and skin cancers. |
Quick guide: National weather warnings relevant to land-based activities
Warnings are not informational background. They indicate heightened risk. When one applies to your area and timeframe, reassess exposure, terrain, escape options, and whether your objective remains appropriate.
| Warning type | Issued for… |
|---|---|
| Severe Thunderstorm Warning | Severe thunderstorms that produce large hail (2 cm in diameter or larger), damaging wind gusts (90 km/h or more), heavy rainfall that may lead to flash flooding, and/or tornadoes. |
| Severe Weather Warning | Sustained gale-force winds of 63 km/h or more, damaging wind gusts of 90 km/h or more in most areas, very heavy rain, abnormally high tides, unusually large surf waves, and/or widespread blizzards. Different damaging-wind thresholds apply in Tasmania and the NSW Alps. |
| Flood Watch / Warning | Early advice of potential riverine flooding (Watch) and when flooding is occurring or expected to occur (Warning). |
| Fire Weather Warning | Weather conditions conducive to the spread of dangerous bushfires. |
| Tropical Cyclone Watch / Warning | A Tropical Cyclone Watch applies when gale-force winds are expected within 24 to 48 hours. A Tropical Cyclone Warning applies when gales are expected within 24 hours or are already occurring. |
Note on thunderstorm warnings and lightning: The Bureau of Meteorology only issues Severe Thunderstorm Warnings when storms meet specific thresholds for hail, wind, or flooding. Many thunderstorms do not reach these thresholds but still produce dangerous lightning. Do not rely on warnings alone to identify lightning risk. Under Australian Standard AS 1768:2021, seek shelter immediately if lightning is seen or thunder is heard, and do not resume outdoor activity until more than 30 minutes have passed since the last thunder.
Depending on your activity and location, other hazards and warnings may also be relevant.
How that plays out across the Hiking Safety Systems
That interaction between weather and the wider systems is worth breaking down properly, because it’s not just navigation that weather touches:
- Navigation and Positioning: Fog, snow, and heavy rain reduce visibility and increase navigational error.
- Hydration and Fuel: Heat increases fluid demand. Cold suppresses appetite while increasing energy expenditure.
- Decision-Making and Judgement: Severe forecasts require early plan adjustment, not late reactive choices.
- Environmental Awareness: Fire weather, flooding, and storm damage alter terrain conditions.
- Equipment Reliability: Wind, rain, and freezing conditions test shelter systems and clothing layers.
Treat forecasts as dynamic inputs into your planning, not static predictions. The grading system for tracks is fixed. The bush is not.
Explore related guides
Weather planning sits across multiple Hiking Safety Systems. Use the guides below to connect forecasts to practical decisions about route choice, exposure management, river crossings, hydration demand, and what to do when conditions deteriorate in the field.
- Navigation and Positioning: Hike Navigation
- Field observations: Predicting Weather by the Clouds
- Cold risk: Hypothermia and Cold Weather Injuries
- Heat risk: How to Spot and Treat Heat Exhaustion
- Hydration: How to Spot and Treat Mild Dehydration
- Water hazards: River Crossing Techniques
- Snow travel: Hiking on Snow
Information courtesy of the Bureau of Meteorology (Australian Government). Trail Hiking Australia is not liable for losses, damages, costs, expenses, or liability of any kind that may arise from use of this information.
Just go
Oh that’s super handy. Thanks for sharing.
I don’t generally let the weather stop me from going hiking but I do use it as a guide to know where to go hiking. If there’s been a lot of rain and more is forecast, I’ll avoid hikes with rivers that I’ll need to cross. Windy days, I’ll try to avoid areas that have a lot of large trees, particularly if it’s been wet when they are more likely to fall. I’ve had some amazing hikes in bad weather.
Great post. Heaps of useful info, some of which I hadn’t really considered. Thanks for writing this up.
What’s your go-to strategy for staying safe in unexpected weather while out hiking? Do you have a favourite app or resource beyond the Bureau of Meteorology that you rely on?
‘Reading’ the weather and pulling out early if the signs indicate a rapid change. (A lot of places we hike there’s no coverage so…[shrug]…it’s a bit hit and miss but, also, carry a good raincoat)
Great article. I help with planning for teaching and research and also recommend state emergency services app and check for prescribed burns, wildfire, flood warnings etc.
Also, learn where inclement weather comes from in your area, and how to read conditions to tell if storm approaching and no mobile confirmation available. In SE Australia there is clockwise air rotating around a low pressure system approaching from SW. prefrontal wind is Northerly, then NW, then the rain comes with W -SW wind. Rain cells also create evaporative cooling so if the wind is 5°C cooler suddenly, it’s raining downwind.