The Sustainable Development Goals (SDGs) and open science are symbiotic processes. No SDG reveals this connection more strongly than SDG 13-Climate Action. This perspective uses the SDGs as a lens to explore open science practices and prospects. It illustrates, through the concept of Net-Zero, how open science has been an accelerator of SDG 13-Climate Action. It also shows how open science can be further advanced in the context of SDG 13, discussing related SDGs such as Goal 9-Industry, Innovation and Infrastructure; Goal 16-Peace, Justice, and Strong Institutions; and Goal 17-Partnerships for the Goals. In these ways, this perspective describes opportunities for open science and SDG-Climate Action to support and accelerate one another.