All Regions Europe Met Office explains why Heathrow is usually hottest part of London amid 34C forecast The airport could see temperatures get into the middle 30s today My London – WeatherRead More About Author OTW Observer See author's posts Post navigation Previous Amber heatwave health warnings in place as temperatures set to hit 34CNext New London weather forecast predicts when temperatures will plummet after 33C heat Related Stories Weather forecast during London Tube strikes – can I cycle to work? All Regions Europe Weather forecast during London Tube strikes – can I cycle to work? April 20, 2026 Exact date 20C heat will hit London in new forecast All Regions Europe Exact date 20C heat will hit London in new forecast April 20, 2026 Lyrid meteor shower 2026 best time and chances to see in London All Regions Europe Lyrid meteor shower 2026 best time and chances to see in London April 17, 2026