The Met Office Forecast says there are very high levels of pollen expected across the region on Saturday, Sunday and into Monday Hay fever sufferers in Colchester and north Essex have been warned about 'very high' pollen counts this weekend. The East is set to bask in the sun as the UK goes through a mini-heatwave - with temperatures here hitting 28C. The Met Office Forecast says there are very high levels of pollen expected across the region on Saturday, Sunday and into Monday. Grass pollen, weed pollen (nettle, pellitory-of-the-wall, dock, plantain) and fungal spore seasons are in 'peak period'.