The DTC
Driving Conditions6 min read

Driving in Rain, Standing Water & Aquaplaning

Rain changes everything — grip, visibility, and stopping distances. The examiner is watching how you adjust your speed, maintain safe distances, and handle surface water.

The full guide

Rain is one of the most common weather conditions you will face, and it significantly changes how your car behaves. The road surface becomes slippery, visibility drops, and stopping distances can double or more. The examiner will expect you to adjust your driving to match these conditions.

The first and most important adjustment is speed. In wet conditions, your tyres have less grip. Braking distances can be twice what they are in dry conditions. Ease off the accelerator, increase your following distance, and avoid sudden inputs on the steering or brakes. Smooth, progressive control is the key.

Aquaplaning happens when a layer of water builds between your tyres and the road surface, causing a complete loss of grip. It is most likely at higher speeds and when there is significant standing water. If you feel the steering go light and the car lose response, ease off the accelerator gently. Do not brake or steer suddenly. As your speed drops, the tyres will regain contact with the road.

Standing water on the road is a hazard. Driving through deep water at speed can cause aquaplaning or damage to your car. If you must drive through standing water, slow down, keep a steady speed, and test your brakes afterwards. Never drive through flooded roads if you are unsure of the depth.

Visibility is reduced in rain. Use your dipped headlights whenever it is raining, even during daylight hours. Keep your windscreen wipers at the appropriate speed and ensure your washer fluid is topped up. Spray from other vehicles can reduce visibility further — increase your following distance to reduce the spray you drive through.

Common faults

  • Not reducing speed in wet conditions
  • Not increasing following distance in rain
  • Braking or steering suddenly on wet roads
  • Driving too fast through standing water
  • Not using headlights in rain during daylight
  • Not testing brakes after driving through water
  • Following too closely behind large vehicles in spray

What the examiner looks for

  • You reduce your speed and increase following distance in wet conditions
  • You brake and steer progressively rather than suddenly
  • You use dipped headlights whenever it is raining
  • You drive slowly and carefully through standing water
  • You maintain a safe distance from other vehicles in spray
  • You react calmly to aquaplaning without harsh braking or steering

Quick tips

  1. 1Double your following distance in wet conditions — if it is two seconds in the dry, make it four in the rain
  2. 2If you aquaplane, ease off the accelerator — do not brake or steer suddenly
  3. 3Always test your brakes after driving through deep water
  4. 4Use dipped headlights in rain, even in daylight
  5. 5Reduce speed before bends and junctions — wet roads have far less grip

Common questions about driving in rain, standing water & aquaplaning

How much longer is the stopping distance in wet conditions?
At least double the dry stopping distance. At 30 mph in dry conditions, the stopping distance is 23 metres. In wet conditions, it is at least 36 metres. At higher speeds, the difference is even greater. Always leave at least double the gap in wet weather.
What should I do if I start to aquaplane?
Ease off the accelerator gently. Do not brake or steer suddenly. Hold the steering wheel steady and wait for the tyres to regain contact with the road. As your speed drops, grip will return. Then test your brakes gently.
Should I use my headlights in rain during the day?
Yes. Dipped headlights should be used whenever visibility is seriously reduced, including heavy rain during daylight. They make you more visible to other road users and help you see hazards on the road.
How do I drive through standing water safely?
Slow down before you reach the water. Drive through at a steady, low speed to avoid creating a bow wave. Keep the engine revs steady. Test your brakes gently after emerging to ensure they are working. If the water is too deep or you are unsure, find an alternative route.
Why is it dangerous to follow a large vehicle closely in rain?
Large vehicles create a significant spray cloud that severely reduces your visibility. They also have larger blind spots and take longer to stop. Increase your following distance so you can see past the spray and react to hazards in time.
Should I use cruise control in wet conditions?
No. Cruise control can cause you to accelerate when you aquaplane, which makes the situation worse. In wet conditions, maintain manual control of your speed so you can react immediately to changes in grip or visibility.

Ready to put this into practice?

These guides are a great starting point, but nothing replaces working with a DVSA-approved instructor who can give you real-time feedback.

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Driving in Rain, Standing Water & Aquaplaning | The DTC