How to Storm-Proof Your Home for the 2026/27 UK Storm Season

If you do one seasonal preparation job this autumn, make it this one. The storm signal for winter 2026/27 is considerably better evidenced than the cold headlines, and storm damage is both more likely and more expensive than most people assume.

Why storms specifically this winter

The mechanism is jet stream related. A strong El Niño energises the subtropical jet stream, sharpening the temperature contrast across the North Atlantic when it meets colder polar air. That contrast spawns deeper, faster-moving low-pressure systems — and the UK and Ireland sit more or less directly in the path of the enhanced flow.

NOAA has El Niño at Advisory status with a greater than 90% chance of a very strong event for autumn and winter 2026–27. The Met Office’s own framing is that El Niño can increase the likelihood of more unsettled conditions later in the year, including a higher chance of milder, wetter and windier weather during autumn and early winter.

The historical precedent is concrete. During the 2015–16 El Niño winter, Storm Desmond dropped a month’s worth of rain in 24 hours across Cumbria and Lancashire, causing severe flooding in Carlisle and the Lake District.

The single most important point: it’s usually water, not wind

People prepare for storms by thinking about wind. Most household storm damage in the UK is water — driven rain forced into gaps, overflowing gutters saturating walls, blocked drains backing up, and flooding.

Wind causes the dramatic damage (tiles, fences, trees). Water causes the expensive, slow, recurring damage. Prioritise accordingly.

The autumn checklist

1. Clear gutters and downpipes — do this first

The highest-value job on this page, and it’s free if you’re comfortable on a ladder. A blocked gutter in heavy rain overflows down the wall, saturating masonry. Saturated masonry conducts heat out and moisture in, which means a cold, damp house and eventually penetrating damp and mould.

Do it in late autumn, after leaf fall has finished. Check downpipes actually run clear to the drain, not just that the gutter looks empty — a clear gutter feeding a blocked downpipe is no better than a blocked gutter.

2. Check drains and gullies

Clear gully gratings of leaves and silt. If you have a drive or patio that slopes toward the house, that gully is doing important work. Blocked surface drainage is a common route for water to reach a threshold it would never otherwise reach.

3. Inspect the roof from the ground

Binoculars from the garden are fine — you don’t need to go up. Look for slipped or missing tiles, damaged ridge mortar, lifted flashing around chimneys and vents, and any sagging. Get problems fixed before the storms rather than after: roofers are booked solid the week after a named storm, and emergency call-out pricing is a different economy.

4. Secure everything loose outside

Garden furniture, trampolines, parasols, bins, bikes, planters, loose fence panels, ladders. In a genuine storm these become projectiles, and damage they cause to a neighbour’s property can become your problem.

Trampolines are the classic offender — anchor them properly or dismantle them for the season.

5. Check fences and gates

Wobbly posts fail in high wind, and a failed fence often takes the neighbouring panels with it. Autumn is the time to re-set a loose post, not January.

6. Deal with trees

Look for dead limbs, heavy overhanging branches near the house or a parked car, and signs of instability. Get significant work done by a qualified arborist, and check whether any tree is protected by a Tree Preservation Order or sits in a conservation area — that requires permission before work.

7. Check seals around windows and doors

Wind-driven rain finds gaps that ordinary rain never touches. Perished mastic, worn weatherseals and gaps around frames are all worth attention. This overlaps directly with our draught-proofing guide — the same work reduces heating bills and keeps driven rain out.

8. Clear any external vents and airbricks

Airbricks ventilating a suspended floor need to be clear. Blocked ones cause damp under the floor, which is a slow, expensive problem.

If you’re in a flood risk area

Check your risk first — the Environment Agency publishes long-term flood risk by postcode, free, and it covers rivers, sea, surface water and groundwater. Many people who consider themselves not at risk are in a surface-water risk zone.

If you are at risk:

• Sign up for flood warnings. Free, from the Environment Agency, by phone, text or email. Equivalent services exist for Scotland, Wales and Northern Ireland.
• Make a personal flood plan. Where you’d move valuables, how you’d turn off gas, electricity and water, where you’d go, who you’d contact.
• Consider flood protection products — door barriers, airbrick covers, non-return valves. Look for products certified to a recognised standard rather than improvised solutions.
• Photograph and document valuable contents now, for insurance purposes.
• Check your insurance. Flood Re is a government-backed reinsurance scheme designed to make home insurance more affordable for eligible properties at flood risk — worth knowing about if premiums have been a problem.

During a storm

• Stay indoors during the peak. Most storm injuries in the UK involve people outside during the worst of it, or driving.
• Keep away from windows on the exposed side in severe winds.
• Don’t attempt roof repairs mid-storm. Nothing on your roof is worth it.
• Have a power cut plan — torches (not candles), charged power banks, and a way to get information. Call 105 free from any UK phone to report a power cut or get updates.
• Don’t drive through floodwater. A small depth of moving water is enough to move a car, and you can’t see what the road underneath is doing.

After a storm

1. Photograph everything before you touch it — insurers want evidence of damage in situ.
2. Contact your insurer early. After a major named storm they’re inundated; being early in the queue matters.
3. Be cautious about doorstep traders. Rogue roofing traders follow storms. Use a firm you’ve sourced yourself, get it in writing, and don’t pay large sums upfront.
4. Check for water ingress you can’t see — loft space, under floors, behind furniture on exposed walls. Damp discovered in March is often storm damage from December.
5. Dry the property out properly. Our condensation and damp guide covers this, and it matters more than people think — inadequate drying is what turns water ingress into mould.

The overlap with keeping the house warm

Worth noticing that most of this list also improves winter thermal performance. Wet walls conduct heat out far faster than dry ones. Gaps that admit driven rain also admit cold air. A house that’s storm-resilient is generally a cheaper house to heat.

That’s the argument for doing this work in October rather than deferring: it pays back through the whole winter, not just on the stormy days. Our draught-proofing guide and cold room guide cover the thermal side.

Frequently asked questions

Sources

• Met Office — El Niño and the UK (higher chance of milder, wetter, windier autumn and early winter)
• NOAA Climate Prediction Center — ENSO Diagnostic Discussion (>90% very strong event, autumn/winter 2026–27)
• Met Office — UK Storm Centre (storm naming, September–August season)
• Met Office — UK weather warnings
• GOV.UK — Check long term flood risk (postcode risk including surface water)
• GOV.UK — Sign up for flood warnings
• GOV.UK — Prepare for flooding (personal flood plans)
• Flood Re — floodre.co.uk (flood insurance scheme)
• Energy Networks Association — Power Cut 105

Related reading: our winter 2026/27 outlook and condensation and damp guide.