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: 28/03/2017 16:46:27
Heavy showery rain today
Boat Race 2017
Grand National 2017
Formula 1 weather
Regularly updated discussion forecasts.
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