What to Wear in London in August 2026
London in August: 23°C afternoons, 14°C mornings, 8 rain days — late summer, and Notting Hill Carnival closes the month.
- Bright colors + Vans or Sambas for Carnival (you'll walk miles)
- A packable trench for Bank Holiday rain — a British tradition
- Linen midi dresses for parks and pub gardens
- A linen blazer + light cardigan (both) — evenings still drop to 14°C
- Three-pair shoe rotation: sneakers, sandals, ankle boots
- A zipped crossbody for Carnival crowds (pickpockets thrive in sound-system density)
- All-white at Carnival — costume dye transfers
- Heels at Carnival — hours of dancing on uneven pavement
- Assume UK infrastructure handles 30°C heat waves — most homes and old Tube lines have no AC
August in London is late summer — warm, still variable, and dominated by Notting Hill Carnival on the August Bank Holiday weekend (last weekend of the month). Met Office climate data show afternoons at 23.3°C (74°F), mornings at 14°C, 8 rain days, and 198 hours of sunshine — nearly identical to July. Heat waves in recent years (2022's 40°C record) have pushed some August days past 30°C, which London infrastructure (no AC in most homes, limited on Tube) struggles with. Carnival Sunday-Monday is Europe's biggest street festival, centered in Notting Hill — brightly colored outfits, feathers, and cotton dresses dominate, with real rain preparation because Bank Holiday rain is a British tradition. The rest of August is typical London: trench in the bag for rain, light layers for evenings, supportive shoes for cobblestones, and a healthy distrust of the morning forecast.
Carnival Sunday-Monday is Europe's biggest street festival — brightly colored outfits, feathers, and cotton dresses dominate, with real rain preparation because Bank Holiday rain is a British tradition.
The capsule
01Linen midi dress or cotton wrap dressThe August London piece. Warm-day versatile for parks (Hyde Park, Hampstead Heath), pub gardens, and dinners. Linen wrinkles read appropriate.
02Notting Hill Carnival outfit (last weekend of August)Carnival = color. Bright colors, feathers, beads, tropical prints, flag capes. Plan coordinated group outfits. Comfortable walking shoes essential. Waterproof phone pouch for sudden Bank Holiday rain.
03Linen blazer + light cardigan (both)Evenings still drop to 14°C. Linen blazer for Marylebone or Soho dinners; cardigan for pub garden transitions and Tube AC where it exists.
04Wide-leg cotton trousers + tailored shortsTrousers for West End theatre, restaurants; shorts for Regent's Park and Hampstead Heath afternoons.
05Vans or Sambas + leather sandals + ankle bootsThree-pair rotation. Sneakers for walking and Carnival; sandals for warm afternoons; ankle boots for evenings and rain days.
06Packable trench coatStill London, still 8 rain days a month. Trench handles showers without overheating on warm days; tied back on dry afternoons.
07Structured crossbody (with zip for Carnival)Carnival crowds = pickpocket awareness. Zipped crossbody secures phone and cash. Smaller bag than a tote.
- Compact umbrella + sunglasses + hat — British August essentials. Windproof compact umbrella, oversized sunglasses, wide-brim hat or baseball cap for Carnival. All three in the bag.
Day to night
White blouse · linen trousers · Vans · denim jacket · tote. Borough Market Saturday morning, walk the Thames.
Linen midi dress · ankle boots · trench · crossbody. Dinner in Marylebone, theatre in West End.
What to avoid
- All-white outfits for Carnival Sunday — costume dye transfers
- Heels at Carnival — hours of walking and dancing on uneven pavement
- Leaving the umbrella at the hotel on Bank Holiday weekend — British rain has a tradition of arriving at the worst moment
- Heavy winter pieces — even overcast 18°C days don't want wool
- Assuming August will be uniformly warm — 18°C overcast days still happen regularly
Frequently asked questions
Per Met Office climate data (Greenwich Park): average daily high is 23.3°C (74°F), low is 14.1°C (57°F). About 8 rain days with 53mm total, plus 198 hours of sunshine. Similar to July but slightly less sunny. Heat waves can push days above 30°C; 2022 saw a 40°C record.
Bright colors, feathers, beads, tropical prints, flag capes. Comfortable walking shoes (sneakers or Vans) — you'll walk miles over 2 days. Waterproof phone pouch and compact umbrella for Bank Holiday rain. Small zipped crossbody (crowds, pickpockets). Sunscreen + hat for between-rain sun. Many participants wear their country's flag or coordinated group outfits. Avoid all-white — costume dye transfers.
Annually on the August Bank Holiday weekend — the Sunday and Monday at the end of August. Europe's largest street festival, centered in Notting Hill and surrounding West London streets. Grand Carnival Parade on Monday; Children's Day on Sunday. Plan to arrive early (10am); street food, live music, sound systems throughout the neighborhood.
Yes. Warm days (23°C average), long daylight (14.5 hours), Carnival in the final weekend, many outdoor events and pub gardens. The trade-offs: peak tourism, higher prices, and occasional heat waves that UK infrastructure (no AC) handles poorly. Late August brings Bank Holiday traffic and Carnival crowds.
Yes, a light one. Evenings drop to 14°C, restaurants and theatres (especially West End) run cool, and 8 rain days mean a packable trench or light coat is used. Skip heavy wool; a trench or light linen blazer handles 95% of August scenarios.