British weather has always been unpredictable — but the patterns emerging in 2026 are more pronounced than usual. A warmer-than-average North Atlantic and a weak La Niña signal have combined to shift the seasonal averages in ways that will affect everything from weekend plans to long-haul holidays departing from UK airports.
We have pulled together the latest data from the Met Office, ECMWF seasonal outlooks and regional rainfall records to give you a reliable guide to what is coming — and when.
Key takeaway for 2026: wetter winters and springs in the west, hotter summers in the east. Plan accordingly.
Spring 2026 (March–May): Wet, Then Warm
March came in hard across Scotland and northern England, with above-average rainfall for the fifth consecutive year. The Pennines saw 140% of their long-term average precipitation between January and March, and several river systems — notably the Wharfe and the Ribble — reached flood warning levels in mid-March.
April has brought a familiar pattern: Atlantic fronts pushing in from the west, stalling over the Midlands, then clearing eastward. London and the South East have stayed relatively dry, with temperatures in the low-to-mid teens — unremarkable, but not unpleasant.
What to expect through May
- Scotland and Northern Ireland: continued above-average rainfall through mid-May. The west coast faces a higher-than-normal risk of persistent low pressure and associated flooding.
- Wales: unsettled, particularly in Snowdonia and the Brecon Beacons. Hikers should check forecasts carefully before heading into the hills.
- Midlands and North of England: mixed. Warmer spells are possible from late April, but expect disruption from passing fronts.
- South East and East Anglia: the driest area this spring. Temperatures likely to reach 18–20°C by mid-May, with some settled spells.
If you are planning outdoor events or travel through Wales, Scotland or northern England between now and late May, check the Environment Agency and Met Office flood risk maps before you go. Several campsites and riverside venues in these regions carry active flood warnings.
Summer 2026 (June–August): Heat Risk in the East
The 2026 summer outlook is the most striking part of this forecast. The ECMWF model — Europe's most reliable long-range tool — shows an enhanced probability of anomalously warm conditions across England from late June through August. This does not mean wall-to-wall sunshine, but it does suggest a higher-than-average risk of heat episodes.
The record books are relevant context. The UK temperature record of 40.3°C, set in Lincolnshire in July 2022, marked a step change in what British summers can produce. Climate scientists at the Met Office have since confirmed that such events, once classified as once-in-a-thousand-year occurrences, are now plausible once per decade under current emissions trajectories.
Regional summer outlook
- London and South East: highest heat risk. Episodes of 30°C+ are likely in July. Urban heat island effects will amplify overnight temperatures in central London. Air conditioning remains rare in UK housing stock — plan accordingly.
- East Anglia: warm and relatively dry. Good conditions for outdoor events from June onwards.
- South West and Cornwall: cooler sea breezes will moderate temperatures. Sea surface temperatures are slightly above average, meaning milder nights and somewhat more moisture.
- Northern England and Scotland: more variable. Warmer spells are possible but shorter. July and August remain the best months for Scottish Highlands travel — the midges peak from late June.
"The 2026 summer pattern is consistent with what we have been projecting for the 2025–2030 period — heightened risk of prolonged heat in the south and east, with increased convective instability producing heavier-than-expected storm events in brief windows." — Met Office seasonal outlook briefing, March 2026
Autumn 2026 (September–November): Storm Season
British autumns have grown progressively stormier over the past decade. The warm Atlantic sea surface temperatures that feed summer heat also fuel the depressions that track across the UK from September onwards. The 2025–26 winter season saw several named storms — and early projections for autumn 2026 suggest similar activity.
The practical implications: outdoor events in October and November face elevated disruption risk. Bonfire Night (5 November) has now seen significant weather disruption in three of the past five years.
What autumn 2026 is likely to bring
- September: often the most reliable early-autumn month. Indian summer spells — warm, still, with lower humidity — are possible in the South East, particularly in the first two weeks.
- October: storm risk increases from mid-month. Named storms are plausible from mid-October onwards. Western coasts — Cornwall, Wales, Northern Ireland — see the highest wind exposure.
- November: reliably unsettled. Fog and frost will appear in inland areas from early November. The first snowfall events of the season typically occur in Scotland and high-ground areas of northern England.
Winter 2026 (December–February): The Uncertain Season
Long-range winter forecasting carries the highest uncertainty of any seasonal outlook — the chaotic interactions between the Arctic polar vortex, the North Atlantic Oscillation and Iberian high pressure systems make precise predictions unreliable beyond 3–4 weeks. What the models currently suggest for winter 2026 is a mixed picture.
The current most likely scenario (roughly 40% probability) is a mild, wet, westerly-dominated winter — characteristic of a positive North Atlantic Oscillation phase. This means above-average temperatures, particularly in Scotland and Northern Ireland, with persistent rainfall in western regions.
A secondary scenario (roughly 25% probability) involves a mid-winter blocking event — a persistent area of high pressure over Scandinavia or Greenland that deflects the Atlantic jet stream and allows cold continental air to pour westward across the UK. This is the pattern that produced the 2018 "Beast from the East", the coldest UK cold snap in thirty years.
Planning for winter 2026
- If you are booking a Christmas market or outdoor winter event, the first two weeks of December are statistically the best bet for settled conditions.
- January is the highest-risk month for disruptive cold snaps and ice events in central and eastern England.
- February often brings the first signs of spring to southern counties — snowdrops appear reliably in the South West from early February.
Regional Summary: At a Glance
Wetter-than-average spring and autumn. Summer windows in July and August remain excellent for highlands travel. Winter: probably mild and very wet on the west coast.
High rainfall through spring. Summer coastal weather is good but inland areas remain unsettled. Autumn storm exposure is significant on the Pembrokeshire and Ceredigion coasts.
Mixed across all seasons. The Lake District will be extremely wet this spring. The Yorkshire coast offers some shelter from westerly weather in summer.
The driest and warmest region. Summer 2026 heat episodes are most likely here. Spring and early summer offer the most reliable outdoor conditions in the country.
Mild winters, reasonable summers, significant autumn storm exposure. Sea temperatures are warm enough for swimming from late June through September.
Practical Tips: How to Use This Forecast
Long-range forecasts describe probabilities, not certainties. The most useful way to use seasonal outlooks is to inform your planning decisions — not to book or cancel based on them.
- For outdoor events: book flexible options where possible. Most UK venues now offer weather-related rescheduling for outdoor shows and festivals.
- For travel: June and September remain the statistical sweet spots for UK outdoor travel — warm enough, but before the peak heat and the autumn storm season.
- For home preparation: if you live in a flood-prone area, the spring 2026 outlook warrants checking your flood insurance and preparing sandbags or barriers before April ends.
- For gardens: the wet spring is good news for lawns and borders. Slugs and fungal diseases will be elevated — factor this into planting decisions.
We will update this forecast as the seasons progress. Bookmark this page or subscribe below for monthly updates.