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Live forecast for both cities, 12 Oct to 15 Oct.
Forecast data from MET Norway, CC BY 4.0.
Fares and hotel rates usually run higher around these dates. Booking earlier or moving your trip by a day or two often costs less.
Busiest periods: Summer holidays (01 Jul – 31 Aug), Christmas and New Year (20 Dec – 02 Jan).
Fixed-date national holidays. Festivals that follow the lunar calendar shift each year and are not listed here, so check the exact date for your travel year.
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Chennai, called Madras until 1996, is one of India's largest metropolitan areas, with car plants along the Sriperumbudur and Oragadam belt, a busy container port and a large share of the country's medical travel. Its December music and dance season is the biggest event in the Carnatic calendar. Visitors use the city as the gateway to the Shore Temple at Mahabalipuram, the silk and temple town of Kanchipuram and the former French enclave of Puducherry along the East Coast Road.
For a short trip, Egmore, Nungambakkam and T. Nagar are central and well served by the metro, while Mylapore and Besant Nagar put you close to the older temples and the beach. Chennai Metro's Blue Line runs from the airport through the city to Chennai Central, and the Green Line links Chennai Central with St. Thomas Mount via Koyambedu. South India's first air-conditioned suburban train started on the Beach to Chengalpattu line in April 2025, and the older suburban trains and MTC buses are inexpensive but crowded at peak hours. App cabs and auto-rickshaws fill the gaps.
The weather is kindest from November to February. The north-east monsoon brings most of Chennai's rain in October and November, and cyclones in those months can disrupt flights and flood roads. The Margazhi music and dance season runs through December into January, with concerts at sabhas across Mylapore and T. Nagar, and Pongal in mid-January closes many offices for several days. At the Kapaleeshwarar Temple and other Hindu temples, remove footwear and dress modestly with shoulders and knees covered. Marina Beach is for walking rather than swimming, as the currents are strong. For Mahabalipuram, leave early to see the Shore Temple before the midday heat, and combine it with the Pancha Rathas and Arjuna's Penance nearby.
November to February, with days of about 24-30°C and lower humidity. October and November bring the north-east monsoon rains.
By Air: Chennai International Airport (MAA) is at Tirusulam, about 21 km south-west of the city centre; allow 45-75 minutes by road. The Blue Line metro stops at the airport, Tirusulam suburban station is linked to the terminals, and MTC buses, prepaid taxis and app cabs are available.
By Rail: Chennai Central (MGR Central) and Chennai Egmore are the main terminals. Vande Bharat trains run to Mysuru via Bengaluru, to Coimbatore and to Tirunelveli, and the Tamil Nadu Express links Central with New Delhi.
By Road: The East Coast Road leads to Mahabalipuram and Puducherry, and NH 48 runs west to Bengaluru. TNSTC and SETC buses for the southern districts leave from the Kalaignar Centenary Bus Terminus at Kilambakkam.
Walk Marina Beach at sunrise and see the lighthouse at its southern end.
Explore the Chola bronzes in the Bronze Gallery of the Government Museum, Egmore.
Attend a December concert at the Music Academy or a sabha in Mylapore.
Visit the Shore Temple and Pancha Rathas at Mahabalipuram on a day trip.
Eat a banana-leaf meal in the lanes around the Kapaleeshwarar Temple tank.
Chennai International Airport (MAA). Terminal 2 handles international flights, and domestic flights use Terminals 1 and 4.
London works best when visits are grouped by area. The British Museum and Bloomsbury can fill one half day, while Westminster and the South Bank offer a different walk along the Thames. Borough Market is close to several river sights, and Greenwich deserves its own trip. From Heathrow, the Elizabeth line, Underground and express rail service reach different parts of the city, so the useful transfer depends on the hotel rather than simply on speed to Paddington.
Paddington is convenient for Heathrow Express arrivals, but the Elizabeth line can be more useful for a hotel near Tottenham Court Road or farther east. Bloomsbury suits the British Museum and central walks; South Kensington suits the museum quarter. Compare the final station rather than only the advertised airport-train duration. Heathrow’s Piccadilly line takes another route through west London and can avoid a change for some addresses.
Air India uses Terminal 2, while British Airways operates from Terminals 3 and 5. An airline name alone therefore does not always identify the correct building. Within London, use the same contactless card or Oyster card when entering and leaving a rail service. Greenwich is a separate outing along the Thames, not a quick extension of a Westminster museum day. The V&A East sites are in the Olympic Park and should not be confused with the original V&A in South Kensington. Pair the east London museums with one another instead of crossing the city between their entrances.
May to September, commonly about 11–24°C, for longer daylight and outdoor walks.
By Air: Heathrow Airport (LHR) is about 25 km west of central London. Heathrow Express reaches Paddington in 15 minutes from Terminals 2 and 3; Elizabeth line, Underground, coaches and taxis are alternatives.
By Rail: Paddington, King’s Cross St Pancras and Waterloo are major rail hubs; the Elizabeth line and Piccadilly line connect Heathrow with the city.
By Road: National Express coaches and local buses serve Heathrow; London buses and taxis cover the city.
Study the collections at the British Museum.
Walk the Thames path along the South Bank.
Browse food stalls at Borough Market.
Visit the historic maritime sites in Greenwich.
Heathrow Airport (LHR). Air India operates from Heathrow Terminal 2. British Airways uses Terminals 3 and 5, so passengers should follow the terminal specified for their particular flight.
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The direct air distance between Chennai (MAA) and London (LHR) is about 8,235 km. Actual flight time varies with the routing the airline files and with winds on the day.
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Planning more than the flight? Our United Kingdom guide covers the visa process for Indian passport holders, best time to go, how long to plan for, and which places are worth the days you have. London, heritage towns and countryside.
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Approx route distance: 8,234.95 km.
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