The ASEAN Climate Outlook Forum (ASEANCOF) is an avenue to collaboratively develop consensus-based seasonal climate outlooks and related information on a regional scale. The forum’s outlook and its activities contribute significantly to one of the key roles of the ASEAN Specialised Meteorological Centre (ASMC), which is to conduct climate and seasonal prediction for the Association of Southeast Asian Nations (ASEAN) region through pooling the expertise of ASEAN National Meteorological and Hydrological Services (NMHSs). In 2021, the ASEANCOF Working Group was established with the goal to guide and support the long-term development of ASEANCOF, in particular regarding the implementation of objective outlooks. 

The ASEAN Climate Outlook Forum (ASEANCOF) serves as a collaborative platform for developing consensus-based seasonal climate forecasts for the region. It supports the ASEAN Specialised Meteorological Centre's (ASMC) role in climate prediction by bringing together expertise from ASEAN weather services. The ASEANCOF Working Group was formed in 2021 to guide the forum's development and implement objective forecasts. The 24th session (ASEANCOF-24) was jointly organised by Cambodia's MOWRAM, RIMES, ASMC, the Working Group, and WMO, with a preceding two-day training workshop led by the UK Met Office, ASMC, and University of Southern Queensland.

The Twenty-third session of ASEANCOF (ASEANCOF-23) was organised by the Department of Meteorology and Hydrology of Lao PDR, RIMES, the ASEANCOF Working Group, and WMO. Participants from the NMHSs of ASEAN Member States created a consensus forecast for the boreal winter monsoon 2024/2025 in the ASEAN region. The consensus for the December-January-February (DJF) 2024/2025 outlook was achieved through an online session, which included presentations from ASEAN NMHSs, questionnaires, and discussions regarding the current climate conditions and predictions for Southeast Asia. The theme of ASEANCOF-23 was Agriculture and Climate Services. On the last day of ASEANCOF-23, a sharing session was held which included updates from ASEANCOF-22 around the use of climate services for agriculture. 

The Twenty-First session of ASEANCOF (ASEANCOF-21) was organised by Meteorological Service Singapore (MSS) in collaboration with ASMC and the ASEANCOF Working Group. ASEANCOF-21 marked 10 years since the first ASEANCOF was held in December 2013. Participants from the NMHSs of ASEAN Member States created a consensus forecast for the boreal winter monsoon 2023/2024 in the ASEAN region. The consensus for the December-January-February (DJF) 2023/2024 outlook was achieved through an online session, which included presentations from different NMHSs, questionnaires, and discussions regarding the current climate conditions and predictions for Southeast Asia. The theme of ASEANCOF-21 was ‘The Future of Climate Services in Southeast Asia’’.