El Nino weather events have been shown to impact significantly on many mosquito-borne diseases (VBDs), including malaria, dengue,Rift Valley fever and others. While the link between El Nino and disease is well established, the mechanism underlying it isnot fully understood. Here we aim to take advantage of the collection over the past 9 years of detailed entomological data on malaria mosquitoes to detect any changes to seasonal changes of mosquito numbers and species found caused by the current El Nino event.