UK Ice Cream Heatwave: Sales Surge, Brand Winners and What 36C Means for the Market

The 2026 Heatwave and What It Did to Ice Cream Sales

The UK has experienced two record-breaking heatwaves in summer 2026, and both have driven measurable, sharp spikes in ice cream spending. The first arrived in late May: Kew Gardens in London reached 35.1C on 26 May, breaking the previous UK May record set in 1922 by more than two degrees. The second, more intense heatwave peaked when Gosport recorded 36.1C on 24 June - the hottest June day in UK history, breaking a record that had stood since 1957. The Met Office issued only its second ever red extreme heat warning during this event, covering much of central and southern England and Wales.

Sales data from NielsenIQ across UK grocery supermarkets in the four weeks ending 13 June 2026 shows frozen food as the fastest-growing grocery super-category at 9.4% year on year, with ice cream rising 34% during the May heatwave fortnight specifically. Total frozen spend across the period reached GBP 252 million. Circana places annual UK ice cream retail sales at GBP 1.6 billion for the 12 months to May 2026, up 3% year on year - a baseline that already reflects the impact of four heatwaves in summer 2025.

The correlation between temperature and ice cream demand is well-established but often underestimated in scale. At Aldi, the July 2025 heatwave period saw the chain sell a quarter of a million ice creams every hour across multiple peak days - 69 per second - a 100% uplift on the same week in 2024. In the same period, Sainsbury's reported 4.7% like-for-like sales growth over 16 weeks to June 2025, driven partly by ice cream and fan demand. The June 2026 heatwave, with peak temperatures 1-3C above comparable 2025 events and significantly higher humidity, is expected to produce figures that again reset the benchmark.

UK Ice Cream Market: Size, Growth and Historical Context

The UK ice cream market was valued at approximately USD 1.31 billion in retail sales in 2025, with Circana placing the GBP figure at 1.6 billion across all channels. The market is forecast to grow at a compound annual growth rate of approximately 4.5% through to 2035, reaching USD 2.03 billion. The UK accounts for approximately 5.7% of global ice cream revenue - a significant share for its population size, reflecting the category's embedded role in British consumer culture. Per-capita consumption stands at approximately 5.1 kg per person per year, and volume growth is forecast at 3.2% in 2026.

The structural growth drivers are consistent: rising demand for premium and artisanal products, expansion of plant-based and vegan lines, and an innovation cycle that has shifted the category beyond the traditional summer impulse occasion. At the segment level, bars and sticks remain the largest revenue-generating format at approximately 35% of UK revenues in 2025. Cones are forecast as the fastest-growing segment through to 2033. Dairy formats dominate at approximately 96% of category revenues globally, with vegan formats projected at a 9.5% CAGR from 2026 to 2033.

The global ice cream market stands at approximately USD 121.4 billion in 2025, projected to reach USD 169.4 billion by 2033 at a CAGR of 4.3%. The UK is one of Europe's largest individual markets and one of the globally most active for innovation and premiumisation. The market is concentrated: the top three corporate owners - The Magnum Ice Cream Company, Froneri, and General Mills - account for the majority of branded revenue.

Brand Performance: Magnum, Wall's, Haagen-Dazs and the 2026 Winners

The Magnum Ice Cream Company was formed following Unilever's demerger of its ice cream division, completing in December 2025 with listings in London, Amsterdam and New York at a valuation of approximately USD 9.1 billion. The company controls around 41% of the UK and Ireland market - more than double its nearest competitor - with a portfolio spanning Magnum, Wall's, Ben and Jerry's, Cornetto, Solero, Calippo, Twister and Carte d'Or. The four power brands generated approximately EUR 6.5 billion in global revenues in 2024 combined. The company's mid-term growth target is 3-5% organic sales growth annually.

Within the portfolio, heatwave conditions specifically benefit the Wall's refreshment formats. Solero, Twister and Calippo achieved combined double-digit sales growth across Europe during June to August of the most recent reported summer. Solero doubled in both volume and value over the prior three years, expanding from a primarily UK brand into France, Spain, Italy and Portugal. The 2026 Love Island brand partnership - running social content via TikTok and Meta - drove demand amplification ahead of what has been the hottest UK summer on record. The Heartbrand portfolio delivered high single-digit organic sales growth in Q1 2026, supported by the Twister Freeze and Volcanix five-layered stick launches.

Magnum itself delivered mid-single-digit organic sales growth in Q1 2026. The Pistachio and Peach launches across the EU drove incremental volume, while the BonBons format continued to roll out across multiple European markets. BonBons - bite-sized frozen snacks positioned for sofa and sharing occasions rather than on-the-go - reflect a broader snackification shift identified by multiple brands. Haagen-Dazs UK's head of brand confirmed that consumer demand is driving growth in small-portion, high-quality formats, with mini cups and stickbars performing strongly alongside premium tubs.

At the value end, Froneri's agreement with Lotus Bakeries to produce Biscoff-branded ice cream from 2026 represents a significant commercial expansion. Given the strong UK brand recognition Lotus Biscoff carries in the biscuit and spread category, this product line is positioned to capture impulse volume during high-temperature periods. In Q1 2026, Germany and the UK together delivered high single-digit growth for The Magnum Ice Cream Company, with the UK specifically noted as an outperformer in the European and ANZ region.

The Heatwave-to-Demand Relationship: Evidence and 2026 Projections

The 2026 heatwave season is historically unusual in both timing and intensity. The May 2026 event arrived earlier than any comparable UK heat episode in the modern record. The June 2026 event carried both record temperatures and a factor absent from the July 2022 event: exceptional humidity, with dew points reaching approximately 22C compared to single-figure dew points in 2022. Higher humidity reduces the body's ability to cool through sweating, making outdoor conditions more uncomfortable at any given temperature and intensifying the consumer shift toward cold foods and beverages. Transaction data from Square for the UK heatwave of 22-25 May 2026 showed a 137% increase in iced coffee purchases as an illustrative proxy for broader cold food and drink demand.

The retail data confirms what temperature-demand models predict. The May 2026 heatwave produced a 6.3% uplift in total grocery multiples sales in the fortnight to 30 May. When temperatures subsequently cooled in the fortnight to 13 June, total grocery sales growth collapsed to 0.4% and volumes fell 1.7%, with shoppers spending GBP 490 million less. This binary on-off pattern means the second heatwave in June 2026 landed at the optimal moment: the NielsenIQ analyst team explicitly noted ahead of the June event that a second heatwave would likely drive another significant sales boost into July, coinciding with the start of the World Cup.

Online rapid delivery benefited disproportionately during the May heatwave, reaching 12.8% share of online sales on 26 May 2026 - its highest share year to date. Ocado was the fastest-growing retailer across the 12-week period at 16.1%, followed by M and S at 14.3% and Lidl at 9.2%. Supermarkets saw own-label ice cream ranges grow three times faster than branded goods at 5.4%, though premium own-label lines grew at 9.1%, suggesting demand is broad-based across value and premium tiers.

Innovation Trends Shaping UK Ice Cream in 2026

Beyond heatwave-driven volume spikes, the UK ice cream category is being reshaped by four overlapping structural trends: premiumisation, miniaturisation, plant-based expansion, and texture innovation.

Premiumisation is the dominant commercial force. Brands are competing on ingredient provenance, texture complexity and format novelty rather than price alone. Magnum's Utopia range, launched in the UK in February 2025, was positioned as the most premium line in the brand's history, featuring marbled ice cream sticks produced via a proprietary ingredient marbling technique. Haagen-Dazs describes texture as the defining battleground in the freezer aisle for 2026: layered, inclusion-led textures and high-density, low-overrun formulations are now a key marker of quality. Haagen-Dazs increased cookie inclusions in its Cookies and Cream variant by 50% following consumer research - a direct response to consumers treating visible, generous inclusions as a signal of premium quality.

Miniaturisation and snacking formats run in parallel. Kantar data indicates that bite-sized formats are helping to premiumise the entire category, as bites are purchased in addition to - rather than instead of - larger formats. Magnum BonBons, Haagen-Dazs mini cups and the Solero BonBons launch across six European markets (including the UK) demonstrate how format innovation can expand occasions. The Haribo Push-up collaboration, which ranked in Aldi's top five ice cream innovations for 2025 and grew 68% year to date as of early 2026, shows the miniaturisation trend operates across price tiers.

Plant-based formats are the fastest-growing sub-segment. Vegan ice creams are projected at a 9.5% CAGR globally from 2026 to 2033. The Ben and Jerry's Non-Dairy range, now under The Magnum Ice Cream Company, and Froneri's incoming Lotus Biscoff-branded line both sit in what brands call permissible-indulgence: treats that carry a recognised flavour promise without dairy. As summer 2026 continues with further heat events forecast, the UK ice cream market enters the second half of the year with all structural trends running in its favour.

How much did UK ice cream sales rise during the 2026 heatwave?

NielsenIQ data shows UK ice cream sales rose 34% year on year during the two-week heatwave period ending 30 May 2026. Frozen food as a whole was the fastest-growing grocery super-category at 9.4% across the four weeks to 13 June 2026, with total frozen spend reaching GBP 252 million.

What is the total size of the UK ice cream market?

Circana data places UK retail ice cream sales at GBP 1.6 billion for the 12 months to May 2026, up approximately 3% year on year. Research firm estimates place the UK market at USD 1.31 billion in 2025, forecast to grow to USD 2.03 billion by 2033 at a CAGR of approximately 4.5%.

Which brands dominate the UK ice cream market?

The Magnum Ice Cream Company - formed via the Unilever ice cream demerger completed December 2025 - controls approximately 41% of the UK and Ireland market. Its portfolio includes Magnum, Wall's, Ben and Jerry's, Cornetto, Solero, Twister and Calippo. Froneri and General Mills (Haagen-Dazs UK) are the other significant players.

How does temperature affect ice cream sales in the UK?

The relationship is consistent and measurable. During sustained heat above 30C, ice cream and refreshment formats shift from occasional treat to essential purchase, with impulse surges at convenience and forecourt outlets. Aldi data from July 2025 shows ice cream selling at 250,000 units per hour at peak - a 100% uplift on 2024 comparables. When temperatures fall, demand resets quickly: grocery ice cream growth fell sharply when the May 2026 heatwave ended.

What is the hottest temperature recorded in the UK in 2026?

The Met Office provisionally recorded 36.1C at Gosport on 24 June 2026, the hottest June day in UK history, breaking a record that had stood since 1957. This followed the May 2026 heatwave when Kew Gardens reached 35.1C on 26 May, breaking the previous UK May temperature record set in 1922.