Driving in High Winds: What a Forecast Tells You and What It Doesn't

Wind is easy to overlook when planning a drive. A forecast may show a single wind speed, but the effect on the road depends on more than that number. Gusts, wind direction, the type of vehicle you drive and how exposed the route is all matter.

A sheltered road through a town can feel very different from an exposed bridge, coastal stretch or mountain pass. Conditions may also change during a long journey, so checking the wind where you start is not enough.

Understanding wind speed, gusts and direction helps you identify potentially difficult sections of a route and decide whether to adjust your departure time or travel plans.

Wind speed and gusts: what is the difference?

Wind speed describes the sustained or average wind over a specified period. Weather forecasts may also provide a separate gust value, representing a brief increase above the sustained wind.

The exact averaging periods and measurement conventions vary between weather providers. Check the definitions and units used by your forecast rather than assuming every source measures wind in the same way.

Both values are useful when planning a drive:

• Sustained wind speed helps you understand the general wind conditions expected over an area.
• Wind gusts indicate the potential for stronger, short-lived bursts that can affect vehicle handling.
• Wind direction helps you assess whether the wind is likely to act as a headwind, tailwind or crosswind relative to the road.

A forecast with moderate sustained winds can still include stronger gusts. For vehicles that are more susceptible to wind, those peaks deserve particular attention.

You can learn more about wind speed and gusts in the glossary.

Why wind direction matters

The same wind speed can affect a vehicle differently depending on the direction from which it blows relative to the road.

• Crosswinds blow across the direction of travel and can push the vehicle sideways. They are particularly relevant on exposed roads, bridges and open stretches.
• Headwinds blow towards the front of the vehicle. They can increase aerodynamic drag and fuel or energy consumption.
• Tailwinds blow from behind and may reduce aerodynamic drag, although their effects depend on the vehicle and conditions.
• Changing or oblique winds can produce varying forces as the road bends or the vehicle moves between sheltered and exposed areas.

Wind direction on a weather forecast is generally the direction the wind comes from. Compare that direction with the orientation of the road to understand how the wind may affect your journey.

A crosswind is not automatically dangerous, and a headwind is not automatically harmless. The potential impact depends on wind strength, gusts, vehicle handling, road exposure and other traffic.

For a related definition, see crosswind.

Why high-sided vehicles are more vulnerable

Wind acts on the area exposed to it. Vehicles with large side profiles can therefore experience greater lateral forces in strong crosswinds than vehicles with smaller exposed areas.

This is one reason trucks, buses, motorhomes and vehicles towing trailers may be more affected by strong winds. Their height, body shape, load and centre of gravity all influence how they respond.

Motorcycles face a different challenge. A gust can affect the rider’s balance and line, while rain, road spray and cold temperatures may add to the difficulty of the ride.

The effect is not determined by height alone. Vehicle design, loading, speed, wind direction and the exposure of the road all play a role.

Before travelling in strong winds, pay particular attention if you are driving a truck, an RV or towing a trailer, or riding a motorcycle.

Check wind conditions along your route

A forecast for your departure town does not necessarily describe the conditions you will encounter several hours later. Wind can vary across a region and may be stronger on exposed coastlines, bridges, ridges and open terrain.

When planning a longer journey, check:

• Where the strongest winds are expected: Identify exposed sections that may deserve closer attention.
• When you will reach them: The forecast may differ by the time you arrive.
• Sustained speeds and gusts: Look at both values rather than relying on a single number.
• Wind direction: Consider how it relates to the road and your vehicle.
• Other weather conditions: Rain, snow, ice and reduced visibility can make an already demanding drive more difficult.

Wayther lets you examine forecast conditions along a planned route, rather than checking only the weather at your starting point or destination. Use that information to identify sections where strong winds may affect your journey.

A route forecast is still an estimate. Local wind conditions can differ from the forecast, particularly in complex terrain or around structures that channel or shelter the airflow.

Could changing your departure time help?

If strong winds are expected on part of your route, compare the forecast for different departure times.

Leaving earlier or later changes when you reach each section. Depending on how the weather develops, this may help you avoid a period of stronger winds or may simply shift the exposure to another part of the journey.

Look at the complete route rather than only the starting conditions. Also consider daylight, travel time and any other forecast hazards that may coincide with the wind.

There is no guarantee that changing your departure time will make the journey safer. If official warnings advise against travel, or road authorities impose restrictions, follow that guidance rather than relying on a different departure time.

See how to find the best time to travel by road for more on comparing departure times.

What a wind forecast cannot tell you

A forecast can help you anticipate strong winds, but it cannot provide a definitive safety assessment for every vehicle or road.

Wind can vary over short distances. A bridge, ridge, gap between buildings or exposed stretch of motorway may experience different conditions from the surrounding area. Forecast values may not capture every local effect or sudden change.

There is also no universal wind speed at which driving becomes unsafe. The risk depends on the vehicle, the direction and strength of the wind, the road and the applicable restrictions. Road authorities may close exposed routes or bridges when conditions warrant it.

Before departure, check official weather warnings and road information. If conditions deteriorate while you are driving, prioritise control of the vehicle and look for a safe place to stop if continuing is hazardous. Do not stop in an exposed or unsafe location simply to wait for the wind to ease.

Use wind forecasts to plan ahead, identify exposed sections and understand the conditions you may encounter. Treat them as planning information, not a guarantee that a route will be safe to drive.