Good Morning!
Temperatures soar to near-record highs for May as clear skies blanket the capital. Here's everything you need to know before stepping outside today.
High today 34°C 93°F
Overnight 19°C 67°F
Conditions Clear 0% rain
Rain chance 0% Dry all day
What's the weather like in London today?
London is experiencing a remarkable spell of summer-like heat this Tuesday, with temperatures expected to peak at 34°C (93°F) — an extraordinary reading for late May. The skies are completely clear, with no cloud cover or rainfall forecast throughout the entire day. Overnight temperatures have already settled around a mild 19°C (67°F), making it one of the warmer nights of the year so far.
This unseasonably hot weather is driven by a persistent high-pressure system anchored over Britain, drawing warm air northward from continental Europe. Meteorologists note that this kind of heat in May is increasingly notable, with temperatures rivalling those typically seen in mid-July. Londoners emerging from a grey spring will find today's sunshine a dramatic contrast — and a timely reminder to prepare appropriately before heading out.
"At 34°C, London is touching temperatures more characteristic of a Mediterranean July. The capital hasn't seen warmth like this so early in the season for several years."
Five-day forecast at a glance
Mon 34°C Clear
Today 34°C Clear
Wed 26°C Clear
Thu 29°C 20% rain
Fri 26°C 20% rain
What does this mean for Londoners?
Temperatures at this level move well beyond comfortable warmth into territory that poses genuine health considerations, particularly for the elderly, young children, outdoor workers, and anyone engaging in physical activity. The combination of direct sunlight, minimal wind, and urban heat — London's dense city environment tends to trap warmth — means that the "feels like" temperature on exposed streets and public transport may feel even hotter than the official reading.
Those commuting by Tube should prepare for significantly elevated temperatures underground, especially on older lines such as the Central and Jubilee, which regularly exceed 30°C even in moderate weather. Extra hydration and patience will be essential during peak hours.
Caution Alert:
The UK Health Security Agency (UKHSA) typically issues a Heat Health Alert when temperatures exceed 30°C for two or more consecutive days. With Monday and Tuesday both reaching 34°C, residents should follow official heat health guidance.
Essential precautions before going outside
- Stay well hydrated. Drink water consistently throughout the day — at least 2–3 litres. Don't wait until you feel thirsty, as thirst is already a sign of early dehydration in hot weather. Avoid alcohol and excess caffeine, which accelerate dehydration.
- Apply high-factor sunscreen. Use SPF 30 or higher on all exposed skin. Reapply every two hours, especially if sweating. The UV index is expected to be very high today, increasing the risk of sunburn even in short windows outdoors.
- Dress for the heat. Opt for loose-fitting, lightweight, light-coloured clothing that reflects rather than absorbs sunlight. Natural fabrics like cotton and linen breathe significantly better than synthetics in extreme heat.
- Protect your head and eyes. A wide-brimmed hat shields the face, neck, and ears — areas particularly vulnerable to sun damage. Sunglasses with UV400 protection will protect your eyes from the intense glare of unbroken sunshine.
- Avoid peak sun hours. The sun is most intense between 11am and 3pm. If possible, schedule outdoor activities for early morning or late afternoon. If you must be outside midday, seek shade wherever possible.
- Know the signs of heat exhaustion. Watch for heavy sweating, dizziness, nausea, weakness, and cool clammy skin. Move to a cool environment, drink fluids, and use a damp cloth on the skin. If symptoms worsen to confusion, a high body temperature, or loss of consciousness, call 999 immediately.
- Look after children, the elderly, and pets. These groups are most vulnerable to heatstroke. Never leave anyone in a parked car. Ensure pets have access to shade and water at all times, and avoid walking dogs on hot pavements — if the surface is too hot to hold your hand on for five seconds, it's too hot for paws.
Looking ahead: when will it cool down?
The extreme heat is forecast to ease from Wednesday, when temperatures drop to a more manageable 26°C. Thursday and Friday bring a small chance of showers (around 20%) as Atlantic fronts begin to nudge back in, bringing temperatures back into the high twenties. While not cool by London standards, it will feel noticeably more comfortable than today's peak.
For now, today offers a rare window of full summer sunshine that many Londoners will want to enjoy — parks, terraces, and the South Bank will undoubtedly be packed. Just make sure you're prepared, take it easy in the afternoon heat, and stay well refreshed. London summers rarely stay this dramatic for long.
Here's a summary of what's covered:
Today's conditions (26 May 2026): A scorching 34°C (93°F) with perfectly clear skies and zero chance of rain — extraordinary heat for late May, driven by a continental high-pressure system.
The blog includes:
- A live weather snapshot with four key metrics (high, overnight low, conditions, rain chance)
- A five-day forecast strip (Mon–Fri) showing the gradual cooldown from Wednesday
- Editorial context explaining why the heat is so unusual and what it means for commuters
- A heat health alert callout referencing the UKHSA guidance threshold
- Seven detailed precautions covering hydration, sun protection, timing, heat exhaustion recognition, and care for vulnerable groups and pets
- A forward-looking outlook for the rest of the week
