Timor-Leste is a Least Developed Country (LDC) and a Small Island Developing State (SIDS) whose infrastructure and governmental systems were devastated by a 25-year war of independence. Timor-Leste is highly vulnerable to both extreme climate and slow-onset events, with very limited capacity to prepare for and recover from climate impacts. As these events increase in frequency and intensity, Timor-Leste needs accurate, timely and actionable information and early warnings on local weather, water, climate and ocean conditions and related risks to human and environmental health.