Every April, the London Marathon draws tens of thousands of runners and even more spectators to the capital’s streets. Whether you’re there to support a loved one, soak up the electric atmosphere, or simply enjoy one of London’s biggest sporting events, knowing what to wear is essential.
Standing for hours outdoors in changeable British weather calls for a smart balance of comfort, practicality and style. Therefore, from layering tips to footwear advice and accessories that make a real difference, here is your ultimate guide on what to wear to watch the London Marathon.
1. Check the Weather First
Let’s start with the obvious: British spring weather can be unpredictable. One year, it may be sunny and 18°C, while the next could bring drizzle and chilly winds. For that reason, check the forecast a day or two before race day and plan your outfit accordingly.
Keep in mind:
- Early morning starts can be chilly.
- You may be standing in windy or shaded areas for long periods.
- Weather can change quickly, so layering is key.
2. Comfortable Footwear is Essential
You’ll likely be on your feet for hours, whether walking between checkpoints, waiting near the finish line or tracking your runner’s progress. As a result, supportive footwear should be a priority.
Best options:
- Trainers or walking shoes with cushioning and arch support
- Weatherproof boots if rain is forecast
- Avoid sandals or brand-new shoes that have not been broken in
Top tip: Bring blister plasters or insoles if you are prone to foot discomfort.
For more inspiration, explore our guides to the best running brands, the best men’s trainers in 2026 and the best trainer stores in London.
3. Dress in Layers
April mornings often begin cool before warming up by midday. Because of this, layers are the easiest way to stay comfortable throughout the day.
Suggested layers:
- Base layer: Long-sleeve cotton or technical top
- Mid layer: Lightweight jumper, hoodie or fleece
- Outer layer: Windbreaker, packable rain jacket or light parka
Avoid bulky pieces. Instead, lightweight but warm fabrics such as merino wool or thermals will serve you far better.
4. Don’t Forget a Waterproof Jacket
The London Marathon happens rain or shine, so a waterproof or water-resistant jacket is always a wise choice. Ideally, look for something:
- Lightweight and easy to pack away
- With a hood and zipped pockets
- Breathable if temperatures rise later
Avoid umbrellas, as they are awkward in crowds and can block other spectators’ views.
5. Opt for a Hands-Free Bag
You’ll want your hands free for clapping, cheering and holding signs. Therefore, a crossbody bag, bumbag or small backpack is ideal.
What to pack:
- Phone and portable charger
- Snacks and reusable water bottle
- Tissues, plasters and hand sanitiser
- Sunglasses and SPF, just in case
- Marathon tracker app on your phone
- Lightweight blanket or sit pad for comfort
6. Bring Something to Sit On (Optional)
If you plan to stay in one spot for several hours, especially near the finish line, it may be worth bringing a foldable stool, picnic blanket or foam seat pad. However, make sure it is compact and portable, as crowds can become dense.
7. Embrace the Marathon Spirit
Watching the marathon is not just about standing on the pavement. Instead, it is a celebration of endurance and support. Many spectators wear:
- Custom T-shirts with their runner’s name
- Bright colours so runners can spot them
- Funny signs or flags to cheer everyone on
Feel free to dress up, wear fun hats or go all out with balloons and banners, because it is all part of the atmosphere.
8. Weather-Specific Dressing Tips
Here’s how to fine-tune your outfit depending on the forecast:
Sunny and mild (15–18°C)
- Breathable layers such as cotton or linen
- Sunglasses and a wide-brim hat or cap
- Light jacket tied around your waist
Cloudy or drizzly (10–14°C)
- Long-sleeve base layer plus water-resistant jacket
- Lightweight scarf or neck warmer
- Waterproof shoes or boots
Cold and wet (Below 10°C)
- Insulating mid-layer such as fleece or knitwear
- Waterproof coat with hood
- Thermal leggings or lined trousers
- Gloves and a beanie or thermal hat
9. What Not to Wear
A few things to avoid if you want to stay comfortable all day:
- High heels or flat-soled shoes because your feet will feel it quickly.
- Heavy coats as you may overheat or feel restricted.
- Large bags which are awkward to carry in crowds.
- Jewellery or snag-prone accessories in busy areas.
- T-shirts only unless it is unusually warm.
10. Style and Comfort Can Work Together
You do not need to sacrifice style to stay practical. For example, try:
- Neutral tones with pops of colour through scarves, hats or signs
- A sleek raincoat or trench for minimalist appeal
- Monochrome trainers with joggers or structured jeans
- Layered knits with tailored outerwear
Comfort and functional fashion can go hand in hand, especially with today’s range of performance-led labels. You can also browse brands similar to Adanola or our guide to business casual trainers for more outfit ideas.
Bonus: What to Wear If You’re Meeting a Runner After the Race
Many spectators meet friends or family in the designated reunion zones near the finish line in St James’s Park. Therefore, you may want to look polished for post-race photos and celebrations.
Quick freshen-up tips:
- Pack a travel-sized deodorant or face mist
- Add a layered necklace or accessories
- Bring a clean top or jumper if the weather turns
Final Thoughts
The London Marathon is one of the city’s most inspiring days of the year. Whether you’re tracking a loved one or simply cheering on thousands of strangers, the atmosphere is always special.
Ultimately, dressing smartly with comfort, weather-readiness and layers in mind can make the difference between a relaxed day out and a cold, soggy one. So plan ahead, dress wisely and enjoy every moment from the sidelines.
