IOM Yemen DTM’s Flow Monitoring Registry (FMR) monitors migrant arrival on the southern coastal border and Yemeni return locations on Yemen's northern border with the Kingdom of Saudi Arabia (KSA). Enumerators placed at Flow Monitoring Points (FMPs) record arrivals of migrants and returning Yemeni nationals in order to identify different patterns of migration, and to provide quantitative estimates to help define the population of irregular migrants entering the country. FMR is not representative of all flows in Yemen and should be understood as only indicative of the individuals recorded at FMPs during the time frame indicated. Access constraints limit the ability to collect data at some migrant arrival points.
In August 2021, IOM Yemen DTM estimates that 1,762 migrants entered Yemen, compared to 1,566 migrants in July 2021. The slight increase in the number of migrants in August comparing to July is due to improved weather conditions for boat trip to landing points in Yemen coastal side. The increase trend in migrant arrival is expected in September, 2021. DTM estimates that 2,769 Yemeni returns from KSA during the month of August 2021, compared to 1,821 in July and 1,231 Yemenis in June 2021. During the period between 1 January and 31 August 2021, an estimated 13,311 migrants and 5,822 Yemenis arrived in Yemen.