The Coastal Ocean Environment Summer School In Nigeria and Ghana is an international collaboration aimed at building capacity in oceanographic and environmental sciences in Ghana and Nigeria.  A long-term goal of the school is to increase the presence of African scientists at international science meetings.  Summer schools have been held in-person in Ghana every year from 2015 to 2019, and have been held virtually, in response to COVID-19, in 2020 and 2021. In 2022, COESSING was held for the first time in Nigeria as a hybrid in-person/online event. Funding has been secured for a 2023 school in Ghana and a 2024 school in Nigeria. Pending successful funding efforts, we will continue to hold the summer schools far into the future.  We have built links with institutions in Ghana, Nigeria, and other African countries, and have incorporated research partnerships into the summer school, alongside lectures, labs, field trips, panels, and tutorials.