August is London's warmest, busiest and most expensive month: days are long and usually pleasant, British schools are on holiday, and the month ends with Notting Hill Carnival over the summer bank holiday weekend. Come for the outdoor life and the Carnival, but book rooms and timed tickets early.
For most of Europe, August is the classic holiday month, and London feels it. Families from across Britain and abroad fill the museums, the parks and the riverside, while many Londoners are away themselves. The city stays fully open: shops, theatres and attractions run normal or extended hours, and nothing major closes for the summer.
This guide explains what August weather is really like, which events fall in the month, how the school holidays and the bank holiday change things, and how to plan so that the crowds and the prices do not spoil your trip.
August at a glance
- Average high / low
- 23.4°C / 14.1°C (Met Office, Heathrow, 1991-2020)
- Rain
- 52.8 mm, spread over about 8 days with 1 mm or more
- Sunshine
- About 202 hours in the month, roughly 6.5 hours a day
- Bank holiday
- Last Monday of the month: 30 August 2027
- School holidays
- All month (English state schools break up in late July and return in early September)
- Big event
- Notting Hill Carnival, bank holiday weekend
How warm August really gets
The Met Office's long-term averages for Heathrow, on London's western edge, give an average daily high of 23.4°C and an average low of 14.1°C. That is the typical picture: warm afternoons, mild nights and enough sunshine for picnics and long walks. Central London, with its buildings and traffic, often feels a degree or two warmer than the airport.
Averages hide the extremes, though. Some Augusts bring several days above 30°C, and London is not built for heat. Many hotel rooms, older flats and small restaurants have no air-conditioning, and the deep-level Tube lines such as the Central and Northern can be very hot in the afternoon. Buses and the Elizabeth line are usually more comfortable on those days.
Rain is not rare either. August averages 52.8 mm, slightly more than July, often in short heavy showers after a hot spell. On about eight days in the month you can expect at least a millimetre of rain, so a light waterproof belongs in the bag even in high summer. Our month-by-month weather overview compares August with the rest of the year.
Spend the hottest hours inside a free museum. The big national museums are free and cool inside, so plan outdoor sightseeing for the morning and evening and keep the hours around 2pm to 5pm for galleries. Arrive early, though: queues at the South Kensington museums are longest in the school holidays.
Notting Hill Carnival on the bank holiday weekend
The biggest event of the London summer is Notting Hill Carnival, a Caribbean street festival with costumed parades, steel bands, sound systems and food stalls. It fills the streets of west London over the last weekend of August, which in England includes the summer bank holiday Monday.
The organisers have already announced the 2027 dates: Sunday 29 August is Families and Children's Day and Monday 30 August is Adults Day, both free to all. The Panorama steel band competition on Saturday 28 August 2027 is ticket-only. The 2026 Carnival, the 60th anniversary edition, was held on 29-31 August 2026.
Carnival is huge, loud and crowded, and the streets around Ladbroke Grove and Westbourne Park are packed all day. Families usually find Sunday easier. Some stations near the route may close or become exit-only at busy times, so check TfL's live status before you set off and be ready to walk from a station further away. Keep phones and wallets in front pockets or a zipped bag, and agree a meeting point in case your group gets split up. Our advice on staying safe in crowds applies here more than anywhere.
If you prefer to see the area on a normal day, our guide to Notting Hill's streets and markets covers Portobello Road and the pastel terraces.
School holidays and the bank holiday Monday
English state schools are on holiday for the whole of August. Term dates vary by borough; in Lambeth, for example, the 2026-27 school year ends on Thursday 22 July 2027 and the next one starts on Wednesday 1 September 2027. Schools elsewhere in Europe follow their own calendars, and many continental families also travel in August.
The effect is simple: weekdays feel like weekends at the family attractions. The Natural History Museum, the Science Museum, the zoo and the aquarium are busiest from late morning. Book timed entry where it is offered and arrive at opening time. Our guide to London with children has ideas that work away from the main queues.
The summer bank holiday falls on the last Monday of August (30 August in 2027). Banks close, but most shops, museums and attractions open, some with Sunday hours. Our page on bank holidays and opening hours explains what changes and what does not.
Palaces, concerts and theatre that only run in summer
August is one of the few times you can go inside Buckingham Palace. In 2026 the State Rooms opened from 9 July to 27 September, with adult tickets at £33.00 in advance or £37.00 on the day. The Royal Collection Trust publishes each year's dates ahead of the season, so check its website before planning around a visit.
The BBC Proms, the world-famous summer season of classical concerts at the Royal Albert Hall, is in full swing during August. The 2026 season ran from 17 July to 12 September; the 2027 dates had not been announced at the time of writing. Cheap standing tickets on the day are part of the tradition.
Open-air theatre is at its best now. The Shakespeare's Globe summer season runs through August, and standing tickets in the yard cost £5 or £10 depending on the performance. The Regent's Park Open Air Theatre also plays through the summer; its 2027 season had not been announced when we checked.
Parks, swimming and the river on long evenings
The sun sets late in August, and the long light evenings are the best thing about the month. Londoners spend them in the parks, on the canal towpaths and by the river. Hyde Park and Kensington Gardens are the obvious choice in the centre. The Diana Memorial Playground in Kensington Gardens is open from 10am to 7.45pm from May to August and admits only adults who are with children aged up to 12.
For a swim, the Serpentine Lido in Hyde Park is open in the summer season. An adult full-day ticket costs £8.40, a session £6.50 and entry after 4pm £2.50 (Royal Parks, 2026). The bathing ponds on Hampstead Heath cost £5.00 for a single swim; in summer the City of London asks swimmers to book online.
The Thames is at its most pleasant too. A sightseeing cruise on the river or the Uber Boat commuter service gives you a breeze and views of Tower Bridge and Greenwich. In the evening, a rooftop bar is a popular way to see the skyline, but book at weekends.
Paying high-season prices without overpaying
August is peak season for London hotels, and prices for the bank holiday weekend and Carnival nights are among the highest of the year. Booking early helps, and so does staying one or two Tube stops outside the centre. Always book through the hotel or a well-known platform, and be wary of short-let adverts that ask for bank transfers; our page on accommodation scams shows the warning signs.
Paid attractions often use peak pricing in the school holidays. ZSL London Zoo, for example, has four price tiers, and summer weekdays fall into the higher ones. Many attractions charge less online than at the gate, so buy in advance where you know your date. The free museums, parks and viewpoints do not change price at all, and they are the best way to balance a costly trip.
| Summer ticket (adult, 2026 prices) | Price | Tip |
|---|---|---|
| Buckingham Palace State Rooms | £33.00 in advance, £37.00 on the day | Summer only; closed Tuesdays and Wednesdays in September |
| Globe yard (standing) | £5 or £10 | Limited £5 tickets every Friday at 11am |
| Serpentine Lido | £8.40 full day, £2.50 after 4pm | Booking recommended, not essential |
| Hampstead Heath ponds | £5.00 single swim | Book online in summer |
A couple spending an evening at the Globe and an afternoon at the Lido pays £36.80 for both (standing at £10 and a full-day swim at £8.40 each). A family of four with two children aged 5-17 pays £99.00 for the Buckingham Palace State Rooms if they book ahead, against £111.00 on the day.
What to pack for a London August
Pack for warmth first, then for a change. Light breathable clothes, a sun hat and sunscreen are essential, and a refillable water bottle saves money on hot days. Add a thin waterproof jacket or a small umbrella for showers, and one warmer layer for evenings by the river and for air-conditioned cinemas and theatres.
Good walking shoes matter more than usual, because summer sightseeing means long days on your feet. For Carnival, wear comfortable shoes you do not mind getting dirty, and leave valuables at the hotel.
Carnival costs nothing, but the Panorama night does. The Sunday and Monday parades are free to watch, so a family can enjoy London's biggest street party without a ticket. Only the Saturday steel band competition needs one.
August compared with the months either side
If you can choose, it helps to know the neighbours. July has similar weather, slightly less rain and a few weeks before the English school holidays begin, so it can feel calmer in its first half. September is often the smarter choice: the children are back at school, the weather is still mild, demand eases once the holidays are over, and the Open House festival opens hundreds of buildings for free.
August wins if you want Carnival, the full summer programme and the longest evenings, and if you do not mind sharing London with a lot of other visitors.
Frequently asked questions
Is August a good time to visit London?
Yes, if you like warm weather, long evenings and a busy city. The average high is about 23°C and most days are dry. The downsides are crowds, because schools are on holiday, and high hotel prices, especially over the bank holiday weekend.
When is Notting Hill Carnival in 2027?
The organisers have announced Sunday 29 August 2027 (Families and Children's Day) and Monday 30 August 2027 (Adults Day), both free. The Panorama steel band competition on Saturday 28 August is ticket-only.
Does it rain in London in August?
Sometimes. The Met Office average for Heathrow is 52.8 mm of rain in August, with about eight days of at least 1 mm. Rain often comes as short, heavy showers after hot weather, so carry a light waterproof.
Is London very crowded in August?
The main attractions are at their busiest, because British and many European schools are on holiday. Book timed tickets, arrive at opening time and use the quieter evenings and early mornings for the most popular sights.
Is the summer bank holiday a problem for visitors?
Not really. Banks close, but most shops, museums, pubs and attractions stay open, some with shorter Sunday-style hours. Public transport runs, though engineering works are common on bank holiday weekends, so check before long journeys.
Sources
- Met Office - Heathrow climate averages 1991-2020 (checked September 2026)
- Notting Hill Carnival - official website (checked September 2026)
- GOV.UK - UK bank holidays (checked September 2026)
- Lambeth Council - School term dates 2026 to 2027 (checked September 2026)
- Royal Collection Trust - Buckingham Palace (checked September 2026)
- The Royal Parks - Serpentine Lido swimming (checked September 2026)
- Shakespeare's Globe - £5 Rush (checked September 2026)