Pollen is moderate in Portsmouth today.

Hayfever sufferers in Portsmouth should track all three pollen types from March through August.

Tree pollen here is dominated by oak, ash and silver birch, with grass led by ryegrass, timothy and cocksfoot and weeds by nettle and plantain.

Tree pollen typically peaks in April. Grass counts are highest from late May to early July. A long warm season and a high oak count make for one of the most active pollen calendars in the UK.

For the wider regional view see South East England.