Practical guide

London: know before you go

Practical, straight-talking London basics: airports to the centre, contactless fares, tap water, and when this city is at its best and its busiest.

Need to know

The essentials, first

This is the London you need to know before you land: how to get in from the airports, how the Tube and buses actually work, what is safe, and when the city is at its best. For visa rules, the currency, plug type, inter-city rail, and national holidays, see the United Kingdom country guide.

When to go

When is the best time to visit London?

Spring

Months
March to May
Weather
Daytime highs rise from about 11°C in March to 18°C in May. Rain is moderate and sunshine increases through the season.SourceWikipedia: Climate of London
Crowds
Crowds build steadily. Easter and the two May bank holidays bring surges, but midweek in March and early May can be quiet.

Summer

Months
June to August
Weather
Highs average 22 to 24°C, with occasional heatwaves pushing past 30°C. Rain is still possible but the days are long, with light until past 9pm in June.SourceWikipedia: Climate of London
Crowds
Peak season. Attractions, hotels, and the Tube are at their fullest, especially from late June through August. Book everything ahead.

Autumn

Months
September to November
Weather
September highs around 20°C drop to 11°C by November. Rain picks up, but September and early October often deliver the year's most pleasant walking weather.SourceWikipedia: Climate of London
Crowds
September and October are the sweet spot: summer crowds thin out but the weather still holds. November gets quieter and greyer.

Winter

Months
December to February
Weather
Daytime highs sit at 8 to 9°C with overnight lows around 2 to 4°C. Grey, damp days are the norm; snow is rare but causes disruption when it arrives.SourceWikipedia: Climate of London
Crowds
Low crowds in January and February except around the New Year. December is packed in the weeks before Christmas. Note: public transport stops entirely on Christmas Day.
When to visit London, by season
SeasonMonthsWeatherCrowds
SpringMarch to MayDaytime highs rise from about 11°C in March to 18°C in May. Rain is moderate and sunshine increases through the season.SourceWikipedia: Climate of LondonCrowds build steadily. Easter and the two May bank holidays bring surges, but midweek in March and early May can be quiet.
SummerJune to AugustHighs average 22 to 24°C, with occasional heatwaves pushing past 30°C. Rain is still possible but the days are long, with light until past 9pm in June.SourceWikipedia: Climate of LondonPeak season. Attractions, hotels, and the Tube are at their fullest, especially from late June through August. Book everything ahead.
AutumnSeptember to NovemberSeptember highs around 20°C drop to 11°C by November. Rain picks up, but September and early October often deliver the year's most pleasant walking weather.SourceWikipedia: Climate of LondonSeptember and October are the sweet spot: summer crowds thin out but the weather still holds. November gets quieter and greyer.
WinterDecember to FebruaryDaytime highs sit at 8 to 9°C with overnight lows around 2 to 4°C. Grey, damp days are the norm; snow is rare but causes disruption when it arrives.SourceWikipedia: Climate of LondonLow crowds in January and February except around the New Year. December is packed in the weeks before Christmas. Note: public transport stops entirely on Christmas Day.
The practical guide

Everything to sort before you go

Getting in from the airport

London has six airports. Heathrow, the busiest, is 14 miles west of the centre. Gatwick sits south, London City is the closest to the financial district, and Stansted and Luton are farther out to the northeast and north. All have rail links. The Tube, Elizabeth line, and express trains serve Heathrow; Gatwick has the Gatwick Express and Thameslink; London City connects via the DLR. Avoid unbooked minicabs at the airport; use the official taxi rank or a pre-booked ride.

Heathrow Express runs non-stop to Paddington in 15 minutes. Tickets start at £10 if booked in advance; walk-up fares are around £25. SourceHeathrow Airport: Getting to Central London

The Elizabeth line from Heathrow to central London (zone 1) costs £15.50 and takes about 45 minutes. The Piccadilly line is slower at around 50 minutes but costs about £5.90, making it the cheapest rail option. SourceTransport for London: Tube and rail fares from 1 March 2026Heathrow Airport: London Underground fares

Gatwick Express trains reach London Victoria in about 30 minutes. A walk-up single costs roughly £24; you can save 10% by booking online. SourceGatwick Airport: Train Travel

The DLR runs from London City Airport to Bank in about 22 minutes. The airport is in zone 3. SourceTfL: London airports and rail connections

Getting around

The Tube is the fastest way across the centre. Buses are slower but give you a view of the city and fill the gaps the Tube misses. Tap the same contactless card or device for every trip; the system caps your daily and weekly spend automatically. You never need a paper ticket. The bus Hopper fare lets you make unlimited bus and tram transfers within an hour for a single £1.75 charge. The Night Tube runs on Friday and Saturday nights on the Central, Jubilee, Northern, Piccadilly, and Victoria lines.

A single adult bus or tram journey costs £1.75 with unlimited free transfers within one hour (the Hopper fare). The daily bus and tram cap is £5.25; the weekly cap is £24.70. SourceMayor of London: July 2026 fare changes (MD3517)

The daily pay-as-you-go cap for Tube and rail travel in zones 1 to 2 is £8.90. A zones 1 to 6 daily cap is £16.30. The weekly Monday-to-Sunday cap for zones 1 to 2 is £44.70. SourceTfL: Fare capping

A paper single ticket on the Tube costs £7.00. Fewer than 1% of journeys use cash fares, and contactless or Oyster pay-as-you-go is always cheaper. SourceBBC News: Tube fares up 4.6% as bus and tram prices frozen

Money and payments

London does not yet charge a tourist tax. The UK government proposed giving the mayor the power to introduce a levy on overnight stays in late 2025, but no rate or date has been set. The city's great financial gift to visitors is its museums: the permanent collections at the British Museum, Tate Modern, National Gallery, V&A, Natural History Museum, Science Museum, and Imperial War Museum are all free.

The British Museum, Tate Modern, National Gallery, V&A, Natural History Museum, Science Museum, and Imperial War Museum all offer free entry to their permanent collections. Special exhibitions may carry a ticket price. SourceVisit London: Free museums in London

Safety and common scams

London is broadly safe. The most common crimes affecting visitors are phone snatches and pickpocketing in busy spots like Oxford Street, Leicester Square, and on the Tube. Keep your phone out of sight near open Tube doors. At night, use a black cab or a pre-booked minicab; unbooked minicabs are illegal and uninsured. TfL funds thousands of police and enforcement officers across the transport network. Report any incident on the Tube or rail by texting the British Transport Police on 61016.

For non-urgent police matters in London call 101. In an emergency, dial 999 or 112. To report an incident on TfL services, text British Transport Police on 61016. SourceVisit London: Emergency services in LondonTfL: Safer Travel at Night

Staying connected

Free Wi-Fi is available at every Tube station, most London Overground stations, and all Elizabeth line stations under central London. Your device connects automatically if your SIM is with a UK network; otherwise you can join the public Wi-Fi manually. Mobile coverage is spreading through tunnels on the Tube, with 4G and 5G now live on sections of the Central, Northern, Piccadilly, Bakerloo, Victoria, and Jubilee lines and the entire Elizabeth line.

Free Wi-Fi is available at all London Underground stations, most Overground stations, and all central Elizabeth line stations. There is no charge and no app required. SourceTfL: Mobile phones and Wi-Fi underground

Etiquette and tipping

Stand on the right on Tube escalators so people can walk up on the left. Let passengers off the train before you board. Queue in an orderly line for buses; pushing in is a genuine social offence. On the Tube, avoid loud phone conversations, eating hot food, and taking up more than one seat. Londoners are reserved in public but helpful when asked directly.

Accessibility

TfL has made steady progress on step-free access. All London buses are wheelchair accessible and can be lowered to the kerb. Black cabs can take a wheelchair. The TfL website publishes a step-free Tube and rail map and a journey planner that filters for step-free routes. Many but not all Tube stations have lifts from street to platform; check before you travel. Staffed stations have personnel who can assist with ramps and boarding.

All London buses have a wheelchair space and a boarding ramp. Black cabs are wheelchair accessible. TfL publishes a step-free Tube and rail guide online. SourceTfL: Transport accessibility

What to book ahead

Book the London Eye, the Tower of London, and the Sky Garden ahead; the Sky Garden is free but books out weeks in advance. Buckingham Palace opens its State Rooms for about 10 weeks each summer and tickets sell out fast. West End shows can be bought on the day from the TKTS booth in Leicester Square, but booking ahead secures better seats. Free museums do not need a ticket for the permanent collections, though weekend queues at popular entrances can be long. A river cruise on the Thames or an Uber Boat ride can be booked on the day but is cheaper online.

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