London in September (2025 Guide): Events & What’s On
Last Updated on 1st September 2025 by Charlotte Nadeau
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Back to school and the summer rush is now over. London in September is still warm and one of my favourite months to visit the city. If you’re looking to visit the capital this month, then here’s the inside scoop as to what’s happening in the UK capital this month: where to go, what to see and all the exhibitions!
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London weather in September
The weather in September is as unpredictable as British weather comes. The days are shorter, though still fairly warm. Bursts of sunshine are often punctuated by showers of rain, meaning that you should be prepared for all weather types! The average temperature during the day is 16 degrees C, making September the perfect time to explore the city.
What to wear in London in September
If you’re visiting London in September, you can expect one of two things: plenty of sun or plenty of rain. Unfortunately, the weather changes so rapidly around this time of the year that it’s almost impossible to predict which weather pattern you’ll get, meaning that you’ll likely need an umbrella or rain jacket.
As such, you’ll be best served by packing a fall wardrobe. Items including tights, trendy dresses, and cardigans with plenty of layers, coupled with some waterproof shoes will serve you best. I personally recommend packing a pair of boots as these will still look chic when paired with city clothing, and yet be much more waterproof than tennis shoes.
What to do in London in September
Rainy days
It can rain in the Great Smoke around this time of the year. And the best thing to do is be prepared for it. September is a particularly rainy month, meaning that you should be prepared to ditch your outdoor plans and head for the indoor places instead. Want some inspiration for the Big Smoke in wet weather? Here’s how to spend a rainy day in London.
Open House London
The middle of the month also happens to signal one of my all time favourite London activities In 2025, the Open House is a 2 week festival which is held in the middle of September and will signal the opening of my places of historic interest that are normally closed to the public. More information can be found on the Open House London website.
Londinium Celebrations
As well as Open House month, September in London also signals the start of Londinium celebrations. London began in its most recent form as the Roman city of ‘Londinium‘. Scattered throughout the City of London, as well as other areas of the city, you’ll find the remains of times gone by.
Some of my favourite spots include the Roman Amphitheatre (located in the Guildhall and free to visit.), seeing Roman artefacts at the Museum of London and visiting Leadenhall Market (a grand Victorian shopping centre built on what was once the heart of ‘Londinium’).
Museums and galleries in London I’m loving this month!
In September, all those studying in the UK return to school, college or university. As a result, the city is much calmer than normal and there are fewer queues to see some of the best exhibitions the city has to offer. Cooler temperatures mean that even if you head indoors, you’re not missing out on too much good weather!
Dr. Johnson’s House
(17 Gough Square, London EC4A 3DE). The delightful house museum at Gough Square was once inhabited by Samuel Johnson, composer of one of the first English dictionaries. Today, it’s a lovely example of a late 17th-Century house.
Sir John Soane’s Museum
(13 Lincoln’s Inn Fields, London WC2A 3BP). Formerly the home of neo-Classical architect Sir John Soane, who designed buildings such as the Bank of England, upon his death he bequeathed the house and its contents to the nation.
The museum is free to visit and well worth a look around, if only to check out the ecclectic collection and portfolio of paintings to rival any larger museum.
Quirky Sites in London I’m loving this month!
London is a historical city which is absolutely packed with cool, quirky and unusual things to do. From searching for lost treasure along the Thames Foreshore to dining in speakeasy-style bars and restaurants, there’s no shortage of activities in the UK Capital. Here are some of my top picks for secret spots in London in September:
The smallest police station in London
(Trafalgar Square, London WC2N 5DN). With fewer crowds, you’ll have a much better chance of spotting the smallest police station in London, hidden in a corner of Trafalgar Square, no less!
Flea at Flat Iron Square
(68 Union St, London SE1 1TD). Held every Sunday from September through to December, the flea market sells vintage treasures and antique collectibles from all over the world. You can find further details on the vintage market on the market’s website.
St Dunstan in the East
(Dunstan’s Hill, London EC3R 5DD). St Dunstan in the East first burnt down during the Great Fire of London in 1666. It was partly rebuilt by Sir Christopher Wren in the early 1700s (architect of St Paul’s) and entirely rebuilt in the 1800s. Sadly, the church was badly bombed during the Blitz and the decision was taken to transform the ruins into a garden. The only part still standing in its entirety was the steeple, designed by Wren.
Where to stay in London in September
September is the start of the European shoulder season, even in the UK capital. What this means for you as a traveller is that the crowds should be much fewer than in the summer and, therefore, the hotel rates should be a lot more competitive! Here are some of the best places to stay in London based on web recommendations, reviews, and location:
Budget accommodation in London
Astor Hyde Park Hostel – I’ve stayed in the Astor Hyde Park Hostel on many occasions while visiting the city. There’s a range of different dorms on offer here, including female-only options. The basement is home to a huge kitchen and dining area while the WiFi is pretty speedy which makes it a great budget option for your London stay! Check prices and availability here.
Mid-range accommodation in London
The Nadler – This four-star hotel is more budget than some of the other options out there thanks to the fact that the Nadler has done away with many of the extras which you probably wouldn’t use anyway. There’s no bar, restaurant, or gym. Instead, there’s great attention to detail and the rooms are clean, comfortable, and friendly. Check prices and availability here.
Luxury accommodation in London
St Pancras Renaissance –This luxury hotel is located minutes away from King’s Cross and St Pancras International, making it a great base from which to explore the rest of the city. Within this luxurious accommodation, you’ll find a pool, impressive staircase that’s been featured in many a film, fast Wi-Fi and a whole host of other amenities you would expect from a 5-star hotel. Check prices and availability here.
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I was in London for two days this week and the weather was so unpredicatble LOL one day it was sunny, the other day it was raining heavily. 🙂 but I still enjoyed London.
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