Hello Londoners and welcome to WeatherForecast.London! Today marks the Summer Solstice — the longest day of the year in the Northern Hemisphere. With sunrise at approximately 4:43 AM and sunset around 9:21 PM, we’re blessed with over 16 hours of daylight. The weather is matching the occasion with a beautifully warm, predominantly sunny day that signals the start of an intense early-summer heatwave.
High pressure dominating from the continent is pumping warm air into the southeast, delivering clear skies and rising temperatures. This is shaping up to be one of the warmest days of the year so far, with more extreme heat on the horizon.
Current and Forecast Temperatures
As of this morning, temperatures are climbing rapidly from overnight lows around 16–18°C (61–64°F). Expect a daytime high of 29–31°C (84–88°F), with “feels like” temperatures pushing into the low-to-mid 30s due to humidity and strong solar heating.
Hourly Breakdown (approximate):
- Early Morning (6–9 AM): 18–23°C, sunny intervals, light winds.
- Midday (11 AM–2 PM): 26–28°C, bright sunshine.
- Peak Heat (2–6 PM): 29–31°C, hottest part of the day with minimal cloud.
- Evening (after 7 PM): Gradually cooling to the mid-20s, still pleasant for outdoor dining.
- Overnight: Lows around 16–18°C, mostly clear.
Winds remain light, generally from the north-east to east at 5–10 mph (occasionally gusting higher), which helps keep conditions feeling comfortable but also traps heat in urban areas.
Precipitation chances are near zero today (<5%), so it’s a perfect dry day for most activities.
Detailed Weather Conditions
- Sky and Sunshine: Long spells of sunshine with only patchy cloud possible in the afternoon. Excellent visibility throughout.
- Humidity: Starting higher in the morning (around 60–80%) and dropping to 40–50% in the afternoon — still adding to the “feels like” warmth.
- UV Index: Very High to Extreme during peak hours. Skin damage can occur quickly without protection.
- Pollen Count: Very High, especially grass pollen. Hay fever sufferers should prepare with antihistamines and limit outdoor exposure if sensitive.
- Air Quality: Generally good to low pollution levels, though urban areas may see slight increases due to heat and traffic.
This solstice warmth is part of a broader pattern: an Amber Extreme Heat Warning is active for parts of southern and eastern England starting tomorrow, with temperatures potentially reaching 35–36°C mid-week.
Historical and Seasonal Context
June 2026 has already seen significant warmth, and today’s conditions align with above-average temperatures for the time of year. The UK’s June record stands at 35.6°C (from 1957), and there’s discussion of it being challenged in the coming days. The solstice brings not just meteorological summer but also astronomical summer, with the sun at its northernmost point.
London’s parks, riversides, and outdoor spaces will be buzzing — think Hyde Park picnics, Thames walks, or rooftop bars. However, this heat also brings important health and safety considerations.
Essential Precautions for Today and the Heatwave Ahead
Extreme heat affects everyone, but vulnerable groups (elderly, young children, pregnant people, those with pre-existing conditions, and outdoor workers) are at higher risk of heat exhaustion or heatstroke. Here’s a comprehensive guide:
- Stay Hydrated Drink water regularly — aim for 2–3 litres or more. Avoid excessive caffeine, alcohol, or sugary drinks. Carry a reusable bottle everywhere.
- Sun and Skin Protection
- Broad-spectrum SPF 30+ sunscreen, reapplied every 2 hours (or after sweating).
- Wear wide-brimmed hats, UV-protective sunglasses, and loose, light-coloured clothing.
- Limit direct sun exposure between 11 AM and 3 PM.
- Plan Your Day Wisely Schedule outdoor activities for morning or evening. Take breaks in shaded or air-conditioned spaces. Avoid strenuous exercise during peak heat.
- Home Cooling Strategies
- Close curtains and blinds during the day.
- Use fans, open windows at night for cross-ventilation.
- Cool showers or damp cloths for relief.
- Check on neighbours, especially the elderly or isolated.
- Health and Safety Watch Recognise symptoms of heat-related illness: dizziness, nausea, rapid heartbeat, confusion, or heavy sweating (or lack of sweating in severe cases). Seek immediate medical help if needed. Never leave children, pets, or vulnerable adults in cars. Be mindful of pets — provide extra water and shade.
- Travel and Commuting Tips Public transport can become very warm; carry water and plan routes accordingly. Cyclists and walkers: stay hydrated and use sun protection. Watch for potential rail delays due to heat on tracks later in the week.
UK Health Security Agency (UKHSA) and Met Office advice emphasises checking on vulnerable people and following official updates.
What to Expect This Week
The heat intensifies significantly:
- Monday: Around 31°C, sunny.
- Tuesday–Wednesday: Potential peaks of 35–36°C with tropical nights (lows staying above 20°C).
- Later in the week: Slight cooling but still warm, with a chance of showers by the weekend.
Stay tuned to our site for hourly updates and alerts.
Enjoying London’s Summer Solstice Safely
This is prime time for exploring the city’s green spaces, enjoying al fresco meals, or attending outdoor events. London shines on days like this — from the Royal Parks to South Bank vibes. Just remember: balance enjoyment with responsibility.
For real-time forecasts, radar, and personalised alerts, visit https://weatherforecast.london/ regularly. We’ll keep you updated as this heatwave evolves.
Stay safe, stay cool, and make the most of the longest day of the year!
Check out Amazon UK Prime early deals
This post contains affiliate links to Amazon. If you click on these links and make a purchase, WeatherForecast.London may earn a small commission at no additional cost to you.
