The forecast indexes are designed to give an indication of how favourable conditions are expected to be for the selected activity.
On the graph 10 represents the best conditions and 0 the worst. The index is generated by considering forecast temperatures, wind speed, rainfall, humidity etc. For example, if it is too cold or too warm this will score the index down, likewise if it raining.
The index is generated from the forecast below and is updated every 6 hours.
Forecast issued: 28/09/2023 02:11:44
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A huge range of charts and data is freely available.
Models include UK Met Office UKV and MOGREPS-G, ECMWF, NCEP GFS, Meteo France Arpege and Arome.