The weather forecast for Worthing, West Sussex, and a quick guide to how the HF bands are likely to be behaving. Both update each time you open the page.
Worthing weather now
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Forecast for the next five days
HF radio conditions
Two numbers from the Sun tell you most of what you need. The solar flux shows how strongly the ionosphere is being ionised, and higher means the upper bands such as 15, 12 and 10 metres are more likely to open. The Kp index shows how disturbed the Earth's magnetic field is. Below 4 is calm. Five or more is a geomagnetic storm, which can wipe out HF.
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The band guide is only a rule of thumb. It uses the flux figure alone and does not allow for the time of day, the path, or sporadic E in the summer. If a band sounds busy, believe your ears.
Related pages: geomagnetic storms, solar wind and sunspots, the ionosphere and maximum usable frequency.
Weather data by Open-Meteo.com (CC BY 4.0). Solar flux and Kp index from the NOAA Space Weather Prediction Center.