El Niño Winter 2026/27: How to Prepare Your Home for Flooding

Short answer: The Met Office says the strong El Niño developing this year makes wetter and stormier conditions likely across autumn and early winter. That raises flood risk, so now is the time to prepare.

What is El Niño?

El Niño is a natural warming of sea temperatures in the tropical Pacific Ocean. It starts thousands of miles away, but it can shift weather patterns over the UK.

How strong is this year’s El Niño?

The Met Office has called it “an unprecedented event”, with sea temperatures forecast to rise by more than 3°C. It describes this as the largest since the 19th century.

What does it mean for UK weather this winter?

• Autumn and early winter: El Niño can increase the likelihood of milder, wetter and windier conditions across the UK. 
• Later in winter: After El Niño peaks, the polar vortex can weaken, which raises the chance of cold weather. 
• Not a guarantee: Met Office chief forecaster Dr Will Lang called it “a subtle shift in the odds” rather than a certainty. Chief Meteorologist Ian Lisk added that a very strong El Niño does not automatically mean more severe impacts for the UK. Go to reference article here.

The Met Office’s three-month outlook covers average conditions across the UK. It does not predict local rainfall on a given day, so the practical lesson is to prepare for unsettled weather without assuming a specific flood. 

How do I prepare my home for flooding?

Work through this flood preparedness checklist before the wettest weather arrives.

1. Check your long-term flood risk. Use the free gov.uk service to see whether your postcode is at risk of river, surface water or coastal flooding. Check long term flood risk now.
2. Sign up for flood warnings. The Environment Agency’s free warning service can alert you by phone, text or email.
3. Clear gutters, drains and gullies. Blocked drainage is a common cause of water pooling near homes.
4. Order sandbags early. Sandbags are a quick, temporary way to slow water at doors and airbricks. They reduce water entry rather than seal a property completely. Government guidance warns that demand may exceed supply during a local flood, so stock up before warnings are issued.
5. Prepare an emergency flood kit. Include a torch, batteries, a battery or wind-up radio, a power bank, essential medication, important documents in a waterproof bag, warm clothing and a first aid kit.
6. Know your utilities. Learn where to switch off gas, electricity and water.
7. Move valuables upstairs. Electricals, documents and sentimental items should go to a higher level.
8. Check your insurance. Confirm your home policy covers flood damage and read the small print.

Why should I order sandbags before the wet weather arrives?

Sandbags are one of the fastest and most affordable ways to protect a home from flood water. They are also the item most likely to run short once a flood warning is issued. Demand surges during storms, and delivery slots fill quickly. Buying before the weather turns means you have flood sandbags on your drive when you need them, not on order.

Do sandbags stop flooding?

Sandbags slow and divert water. They are not fully watertight, so they work best as a temporary barrier at doors, airbricks and low entry points. They suit short-notice protection, particularly for surface water and flash flooding, where there may be little time to act.

How do I use sandbags properly?

• Fill bags about two-thirds full. This lets them mould to the ground and each other.
• Lay them like brickwork. Overlap each layer so there are no straight joins.
• Start on a clear, level surface. Remove debris so the bags sit firmly.
• Press each bag down to close gaps.
• Protect key entry points first, such as doors, airbricks and gaps in garden walls.

Pre-filled sandbags save time when water is rising, because you can start building straight away. Bulk bags are useful if several households or a street want to share one delivery.

Can neighbours share sandbags?

Yes, and it is a practical way to prepare. Sandbags are delivered on a pallet, so neighbours can order together, split the cost and agree where to store the bags. This helps whole streets prepare ahead of a storm, particularly if you are all affected by the same surface water or drainage issue.

Next-day sandbag delivery from Sandbags Direct

We are UK flood defence specialists, supplying homeowners, businesses and local authorities with flood defence sandbags. Our stock holding capacity is 125,000 tonnes across our group, so we can dispatch quickly, even during peak flood events.

• Next-day delivery on orders placed before 1pm, Monday to Thursday
• Friday orders (placed before 1pm) arrive the following Monday
• Standard delivery within 2–3 working days
• Nationwide pallet delivery
• Quality-assured supply: we operate a BS EN ISO 9001:2015 certified Quality Management System and supply local councils and authorities across the UK

Don’t wait for the warning. Order your flood sandbags today

Tip: tell us about any delivery restrictions (such as narrow access) before dispatch, and give a full address, postcode and contact number to avoid delays.

El Niño home protection FAQs

Will El Niño definitely cause flooding in the UK?
No. It increases the likelihood of wet, windy weather, but flooding depends on local rainfall, ground conditions and drainage.

Will this winter be colder or snowier?

Possibly later in winter, but the Met Office has not forecast an unusually snowy winter. Past El Niño winters have varied: 2009–10 was very cold, while 2006–07 was unusually warm. 

When should I prepare for El Niño?

Before warnings are issued. Once a flood warning is live, delivery and supplies can be stretched.

Where can I get the latest forecasts?
The Met Office and Environment Agency publish up-to-date forecasts and warnings, which can change as the El Niño develops.