Southeast Asia stands at the intersection of ocean opportunity and climate vulnerability. With 173,000 km of coastline and some of the world’s most climate-exposed communities, ASEAN nations have a unique responsibility and advantage when integrating ocean-based climate action into their 2025 Nationally Determined Contributions (NDCs). The next cycle is pushing governments to sharpen targets, quantify outcomes, and bring ocean systems into the centre of climate strategies rather than the margins.
Below is a detailed, data-driven examination of how ASEAN countries are expanding their ocean commitments, where progress is concentrated, and what gaps must be bridged to achieve real impact.
1. Ocean-Based Climate Action is Expanding Across ASEAN
The 2025 NDC cycle shows clear growth in ocean-related commitments, particularly in coastal conservation, fisheries resilience, and marine governance. While the strength of commitments varies, ASEAN is aligning more closely with global best practices by linking ocean protection to mitigation, adaptation, and social resilience.
Most ASEAN nations now include:
- Coastal rehabilitation
- Climate-resilient fisheries
- Blue carbon ecosystems
- Coastal tourism risk management
- Marine policy reform
This marks a significant shift from earlier cycles, which were focused mainly on land-based mitigation.
2. Priority Ocean Climate Actions in ASEAN NDCs
2.1 Protecting Coastal and Marine Ecosystems
This is the most widely adopted ocean commitment across ASEAN. Governments are emphasising mangrove restoration, coral reef conservation, and integrated coastal management.
Examples from ASEAN NDCs:
- Indonesia: Large mangrove restoration projects with national-level tracking.
- Malaysia: Blue carbon ecosystem protection embedded in climate policy.
- Vietnam: Extensive coastal forest rehabilitation commitments.
- Philippines: Nature-based coastal protection in community-level adaptation plans.
- Thailand: Coral reef protection and coastal ecosystem monitoring.
- Cambodia: Coastal protection linked to national adaptation strategies.
With over 35% of global mangroves found in Southeast Asia, this area remains ASEAN’s strongest climate opportunity.
2.2 Building Climate-Resilient Fisheries and Aquaculture
Fisheries are central to food security and livelihoods across ASEAN. Many actions listed in the 2025 NDCs focus on adaptive management, resilient supply chains, and low-emission aquaculture.
Examples:
- Cambodia: Strong equity-linked fisheries actions, supporting vulnerable coastal communities.
- Malaysia: Development of climate-smart aquaculture techniques.
- Indonesia: Improved fisheries governance and sustainability frameworks.
- Philippines: Community-based marine resource management.
- Vietnam: Improving aquaculture productivity while reducing climate risk.
This sector is also where equity is most visible, one of the biggest regional strengths.
2.3 Advancing Ocean Governance and Marine Policy Reform
ASEAN countries increasingly link marine planning with climate policy.
Examples:
- Philippines: Multi-agency coastal governance integration.
- Vietnam: Progress on marine spatial planning to reduce coastal risk.
- Indonesia: Strengthening laws on coastal and mangrove protection.
- Cambodia: High ratio of equity-focused governance actions.
Clearer governance is driving more credible NDC commitments in the region.
2.4 Improving Coastal Tourism Resilience
Tourism generates billions across ASEAN, but climate risks like beach erosion and coral bleaching are rising. ASEAN NDCs focus on adaptation rather than mitigation in this sector.
Examples:
- Cambodia: Resilient tourism infrastructure planning.
- Philippines: Risk-informed frameworks for coastal tourism hubs.
- Thailand: Adaptation planning for tourism hotspots.
- Indonesia: Safeguarding marine tourism assets such as reefs and beaches.
This sector holds significant potential for future inclusion in mitigation pathways.
2.5 Emerging Interest in Ocean-Based Renewable Energy
Marine renewables are still at an early stage across ASEAN, but the potential is noted in several NDCs.
Examples:
- Vietnam: Offshore wind as a future mitigation option.
- Philippines: Marine renewable potential acknowledged.
- Indonesia: Wave and tidal energy exploration in R&D contexts.
ASEAN currently shows limited measurable commitments in this area, but rising interest could shift this in future NDC cycles.
3. Which ASEAN Countries are Leading Global Ocean-based Actions?
Only 13% of global ocean-based actions explicitly include equity. Within ASEAN, a few countries stand out for integrating livelihood protection, community engagement, and inclusive climate planning.
ASEAN equity frontrunners include:
- Cambodia – the highest share of equitable ocean actions in ASEAN; fisheries and community resilience are strongly emphasized.
- Philippines – multiple community-led coastal adaptation initiatives.
- Vietnam – actions linking coastal livelihoods to climate adaptation.
- Indonesia – social protection components included in coastal adaptation.
Embedding equity in ocean actions is becoming a differentiator for policy strength across the region.
4. Key Implementation Challenges in ASEAN
4.1 Limited Data and Weak MRV Systems
Blue carbon measurement remains inconsistent across ASEAN.
Many NDC actions are still unquantified, making it difficult to track real impact.
4.2 Climate Finance Gaps
A majority of ocean commitments in ASEAN rely on international finance.
Countries such as Cambodia, the Philippines, Lao PDR, and Myanmar list major financing and capacity needs.
4.3 Technical Capacity Constraints
Monitoring mangrove carbon stocks, modelling coastal risk, and tracking fisheries emissions require specialised skills and tools still developing across the region.
5. What ASEAN Countries Need to Accelerate Ocean Climate Action
5.1 Stronger Blue Carbon Accounting
ASEAN is well-positioned to lead globally, especially through efforts in Indonesia, Malaysia, Vietnam, and the Philippines.
5.2 More Accessible Climate Finance
Blended finance, blue bonds, and regional financing platforms could accelerate implementation.
5.3 Integration of Ocean Systems Across Climate Plans
Countries that integrate NDCs, NAPs, and marine spatial plans will achieve more consistent and credible outcomes.
A Region with High Potential and High Responsibility
ASEAN’s 2025 NDC cycle shows a meaningful shift: ocean-based climate action is moving from scattered commitments to more structured, measurable planning. With strong ecological assets and vulnerable coastlines, the region has both the need and the capacity to create a global model for ocean-centred climate action. Strengthening data systems, scaling finance, and enhancing cross-agency coordination will determine how far these commitments can go in the decade ahead.
Source: https://www.wri.org/research/ocean-based-climate-action-2025-ndcs-preliminary-update