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Live forecasts update automatically; written guidance last reviewed 20 June 2026 by the PressHive weather desk. Data from national met services via Open-Meteo.
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If you’re planning to launch a weather balloon, check the live forecast above for surface wind speeds and upper-air stability before heading out – calm conditions are essential for a successful ascent and reliable data collection.
What is a weather balloon used for?
A weather balloon carries a radiosonde package into the upper atmosphere to measure temperature, humidity, pressure and wind speed. The Met Office and other forecasters release them twice daily from stations across the UK, including near coastal sites, to build the vertical profiles that feed into computer models. The data helps predict everything from local rain to Atlantic storm tracks.
How high can a weather balloon go?
A typical latex weather balloon reaches around 30–40 km (100,000–130,000 ft) before bursting. The ascent takes roughly 90 minutes, and the payload parachutes back to earth. The exact height depends on the balloon size, the gas fill and the weight of the kit – a larger balloon can lift more equipment and travel higher.
Can I buy a weather balloon in the UK?
Yes, weather balloon kits are available online – check specialist suppliers or Amazon for options. Prices vary by size and whether the package includes a radiosonde. Always check Civil Aviation Authority guidance before launching.
What is a weather balloon made of?
Most are made from natural latex or neoprene. Latex balloons are biodegradable and stretch as they rise, while neoprene ones are more durable for specialised missions. The payload is usually a lightweight foam box.
How long does a weather balloon flight last?
From launch to burst is typically one to two hours. The descent of the parachute-equipped payload takes another 30–60 minutes. Total flight time depends on wind speed and balloon size.
Sources
For more on how balloons fit into the bigger picture, see our UK weather hub and the 10-day forecast for your area.