This report presents the integrated case study for Fiji carried out under an OECD project on Development and Climate Change. The report is structured around a three-tier framework. First, recent climate trends and climate change scenarios for Fiji are assessed, and key sectoral impacts are identified and ranked along multiple indicators to establish priorities for adaptation. Second, donor portfolios are analyzed to examine the proportion of donor activities affected by climate risks. A desk analysis of donor strategies and project documents as well as national plans is conducted to assess the degree of attention to climate change concerns in development planning and assistance. Third, an in-depth analysis is conducted for Fiji’s coastal mangroves which help reduce coastal inundation and storm surge damages, but are also themselves vulnerable to climate change. The in-depth analysis on coastal mangroves in this report however highlights the critical challenges that face the implementation or mainstreaming of no-regrets adaptation measures in Fiji. Mangroves protect against coastal erosion and storm surge damages, but are themselves vulnerable to sea level rise. Mangrove conservation is a no-regrets adaptation given the wide range of other ecosystem services they provide to local communities. There is however a trend for continued loss of mangrove cover in Fiji. One key reason is the significant undervaluation of mangroves which facilitates their conversion for development activity. Successful mainstreaming of even no-regrets adaptation responses in Fiji might therefore require greater policy coherence between climate change and development policies – appropriate valuation of mangrove services is one such example. There is also a need for a coastal management plan that prioritizes mangrove conservation, requiring adequate setbacks of development from the high water line to facilitate mangrove migration, and engaging local communities in these processes.