London in May 2026: Weather, Events & Things to Do
We get asked 'when should I come to London?' more than almost any other question, and May is one month we never hesitate to recommend. Spring has fully arrived, the parks and royal gardens are at their most vivid, and daylight stretches past 8pm so there is genuine time to do everything at a leisurely pace. We have walked onto the London Eye on a clear May evening and watched the city glow gold from the top, wandered the wisteria tunnels at Kew Gardens on a weekday when the crowds were thin, and picked up last-minute tickets to open-air theatre under a sky that refused to go dark. The event calendar in May is extraordinary: the RHS Chelsea Flower Show, London Craft Week, and the Harry Potter 25th Anniversary at Warner Bros. Studio Tour all land in May 2026, alongside two bank holiday weekends and the May half-term break. This guide shares what we know from repeat visits: what the weather is really like, every major event happening in May 2026, bank holiday dates, family-friendly ideas for half-term, and the attractions to book now before Chelsea-week prices climb.
Is May a Good Time to Visit London?
In our experience, May is one of the two or three best months to visit London, and the weather is a big part of why. Average temperatures sit comfortably between 10°C and 18°C (50 to 64°F), rainfall is lower than in March or April, and the city enjoys around 15 hours of daylight by the end of the month. That means we can fit a full morning at an indoor museum, a picnic lunch in Hyde Park, an afternoon at an open-air attraction, and still have a long golden evening left over for a Thames cruise or a walk along the South Bank. Crowds are noticeably lighter than in July and August, yet the major outdoor attractions such as Kew Gardens, Hampton Court Palace and the London Eye are all fully open with extended hours, which is the combination we always hope for.
Why You Should Visit London in May
The biggest draw is the events calendar. RHS Chelsea Flower Show, London Craft Week, Regent's Park Open Air Theatre's season opener, the Harry Potter 25th anniversary celebrations at Warner Bros. Studio Tour London, and the Queen Elizabeth II: Her Life in Style exhibition at The King's Gallery all land in May 2026. You also get blooming wisteria tunnels at Kew Gardens, tulips at St James's Park, and a string of outdoor festivals timed around the bank holiday weekends.
What to Watch Out For
May is still a British spring, so packing a waterproof jacket is essential. Showers are brief but frequent. Chelsea Flower Show week (19 to 23 May 2026) drives hotel prices up in Kensington, Chelsea and Belgravia, so book accommodation and tickets weeks in advance. Both bank holiday weekends get busy at top attractions, so aim for weekday mornings whenever possible.
London Weather in May 2026
London weather in May is mild, bright and mostly dry. Average daytime highs climb from around 16°C at the start of the month to 19°C by the end, with nighttime lows around 8 to 11°C. Expect roughly 180 hours of sunshine across the month and an average of 45 to 55mm of rainfall spread across 12 to 14 days, usually in short showers rather than all-day downpours. The UV index rises into the moderate range, so sunscreen is worth packing for river cruises, open-top bus tours and picnics.
Average temperature: 10°C to 18°C (50°F to 64°F)
Rainfall: 45–55mm across ~13 days
Daylight hours: 14 hours (1 May) to 16 hours (31 May)
What to Wear in London in May
Layer up: a light jumper or cardigan with a t-shirt, jeans or trousers, and a compact waterproof jacket or travel umbrella. Comfortable walking shoes are a must, as most sightseeing days involve 15,000 or more steps. Bring sunglasses for the brighter afternoons and a scarf for cooler Thames-side evenings.
May 2026 Bank Holidays in London
May has two UK bank holidays, which means two long weekends of extra-lively events, street markets and festivals across the capital.
Early May Bank Holiday: Monday 4 May 2026 (long weekend 2–4 May)
Spring Bank Holiday: Monday 25 May 2026 (long weekend 23–25 May)
Most major attractions, including the London Eye, Tower Bridge, Kew Gardens and the Tower of London, open as normal on bank holidays, though timings may shift slightly. Some smaller museums and galleries close on the Monday, so check before you travel. Transport for London runs a Sunday service on bank holiday Mondays, and ULEZ/Congestion Charge rules still apply.
Top Events in London in May 2026
Best Things to Do in London in May
Free Things to Do in London in May
May is one of the best months for a budget London trip. Try these free activities when the sun comes out.
Picnic in Hyde Park, St James's Park or Greenwich Park with tulip and cherry-blossom displays.
Visit the brand-new V&A East Museum in Stratford, which has free permanent galleries featuring thousands of objects from the V&A's collection.
Walk the South Bank from London Eye to Tower Bridge, passing Tate Modern and the Globe.
Catch the Changing of the Guard at Buckingham Palace.
Browse Columbia Road Flower Market on Sunday mornings, perfect for spring photography.
Explore permanent collections at the British Museum, National Gallery and Natural History Museum, all free.
May Half-Term in London (25–29 May 2026)
School half-term falls 25 to 29 May 2026, so London fills with family-friendly programming. Book these ahead to keep kids entertained across the long weekend and week.
Warner Bros. Studio Tour, Harry Potter 25th Anniversary
SEA LIFE London Aquarium & Shrek's Adventure on the South Bank
London Dungeon for teens who love a scare
Madame Tussauds for celebrity selfies
ZSL London Zoo, which has new spring arrivals on display
Free entry days at the Science Museum, Natural History Museum and Transport Museum (kids go free at Transport Museum)
Tips for Visiting London in May
Planning a May trip well is the difference between a relaxed, memorable visit and a frustrating one. We have helped thousands of London visitors get this right, and these are the practical tips that come up again and again from our own experience on the ground.
Book Chelsea Flower Show, Harry Potter Studio Tour and major theatre shows at least 4–6 weeks in advance.
Buy a London Pass or multi-attraction combo ticket if you plan to visit 3+ paid attractions.
Travel on weekday mornings for the shortest queues at the London Eye, Tower of London and Westminster Abbey.
Use contactless or an Oyster card on the Tube. Daily caps are automatically applied.
Pre-book restaurants for bank holiday weekends, especially in Soho, Covent Garden and along the South Bank.
Check Chelsea Flower Show transport notices. Sloane Square can get exceptionally busy from 19 to 23 May.
Pack layers and a compact umbrella. May showers pass quickly but arrive without warning.
Frequently Asked Questions About London in May
Yes, and it is one of our genuine personal favourites. The weather in May is mild (10 to 18°C), the parks are in full bloom, and daylight stretches to around 16 hours so you never feel rushed. Major events like the Chelsea Flower Show and London Craft Week give the city a creative energy that is hard to find at any other time of year. We also find that crowds at the big attractions stay manageable compared with July and August, which makes a real difference when you are on the ground.
London weather in May is mild and mostly dry, with daytime highs of 16 to 19°C, overnight lows of 8 to 11°C, around 180 hours of sunshine, and 45 to 55mm of rain spread across 12 to 14 days. Expect short showers rather than sustained downpours.
London isn't cold in May during the daytime, but evenings can feel cool at 8–11°C. A light jumper or jacket is perfect for after-sunset walks along the Thames.
Yes, but sparingly. On average London sees rain on 12–14 days in May, totalling 45–55mm. Showers are typically brief, so a compact umbrella or light waterproof is usually all you need.
Layers are ideal: a t-shirt, a jumper or cardigan, jeans or trousers, and a waterproof jacket or umbrella. Wear comfortable walking shoes, and bring sunglasses for brighter afternoons.
There are two bank holidays in May 2026: the Early May Bank Holiday on Monday 4 May (long weekend 2–4 May) and the Spring Bank Holiday on Monday 25 May (long weekend 23–25 May).
The RHS Chelsea Flower Show, running 19 to 23 May 2026 at the Royal Hospital Chelsea, is the headline event and consistently the hardest ticket to get, attracting over 160,000 visitors including royal guests. London Craft Week (11 to 17 May 2026) is our personal favourite for a more relaxed but equally rewarding week of maker studios, workshops and pop-ups across the city. The Mighty Hoopla festival (30 to 31 May 2026) at Brockwell Park rounds out the month with the biggest pop line-up of the bank holiday weekend.
London is busier than in March or April but noticeably quieter than July and August. The two exceptions are Chelsea Flower Show week and the two bank holiday weekends, when central attractions get busy. Visit on weekday mornings to avoid peak crowds.
May half-term (25–29 May 2026) is one of the most family-friendly weeks of the year. Top picks include the Warner Bros. Studio Tour Harry Potter 25th Anniversary, SEA LIFE London Aquarium, Shrek's Adventure, the London Dungeon, Madame Tussauds and ZSL London Zoo.
Hotel prices in May sit between the low-season rates of January–March and the peak-season rates of July–August. Chelsea Flower Show week (19–23 May) is the most expensive period. Book accommodation at least 4–6 weeks ahead for the best rates.
About the author: The London Tickets Team We're a London-based team who book, visit, and re-check the city's attractions for a living. Between us we've logged hundreds of days on the ground, queuing at the actual Tube exits, eating in the markets, timing the sunset on the South Bank, so the recommendations here come from repeat visits rather than press releases. Every price, opening time, and "best for" call in this guide was verified in 2026, and we update it whenever something closes, moves, or starts charging. Spotted something out of date? Tell us and we'll fix it.