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When does summer start and other summer facts you should know.
Tree pollen occurs first, typically from late March to mid-May. Grass (which actually has two peaks) lasts from mid-May until July, and weed pollen covers the end of June to September.
The sky appears blue to the human eye as the short waves of blue light are scattered more than the other colours in the spectrum, making the blue light more visible.
When heading to the beach for a dip this summer, we want you to enjoy the water but also to recognise its dangers and never underestimate its power.
Please note that when changing units, only forecasts and maps will be affected.