Researchers say London and the south could see more reports of the tropical life-threatening disease for possibly four months a year.
As the weather changes, it could spread north by 2030.
There was a nine per cent increase in the number of imported malarial infections in the UK last year, with 1,501 cases. If a mosquito bites someone who has brought it into the UK from overseas, it could pass it on.
Cities have a heat island effect. This provides ideal environment for mosquitoes to thrive
Entomologist Dr James Logan, from BBC’s Insect Dissection, said: “Cities have a heat island effect. This provides ideal environment for mosquitoes to thrive.” He also warned of new types of mosquitos coming to the UK bringing other diseases.
These include Aedes albopictus, or Asian Tiger, which passes on dengue fever and yellow fever. It has invaded parts of Europe.
However, Jolyon Medlock, at Public Health England’s Medical Entomology team, said: “There is no evidence to suggest they [mosquitos] are any higher this year.”