To unlock more than 400 GW potential of offshore wind in Vietnam, this study presents possible options for zonation and grid integration from now till 2030. We identified four potential zones along the national coastline for offshore wind development by assessing the technical resource areas based on wind speed and variation, ports, synchronous power plants, oil and gas infrastructures, shipping routes, and sensitive sea areas. We then investigate the capability to integrate wind capacity regarding the transmission expansion plan in the period 2020–2030 by calculating generation adequacy and transmission adequacy. The results specify a possible path for the development of offshore wind which balances out the onshore grid capacity with the quantified capacity from four different wind resource zones. By calculating the loss of load probability with various penetration levels of offshore wind, we find out that 10.5 GW of offshore wind by 2030, spreading across four zones, makes an adequate reliable power supply.