The World Bank’s strategy for South Asia emphasizes promoting sustainable and inclusive growth, investing in people, and strengthening resilience. The economic recovery following the adverse impacts of COVID-19 is an opportunity for the region to benefit from an expanding digital ecosystem. Large gains would accrue from data that are generated, collected, organized, and exchanged broadly for the purpose of deriving value from the accumulated information. South Asia is the most exposed region in the world to flooding and heavily impacted by other hydrometeorological hazards. The technical note explores the potential benefits of adopting national policies that support the free, unrestricted use and re-use of data, and in particular, the effect on the development of hydrometeorological services by the public and private sectors. We conclude that open data policies would jump start the transformation to data economies increasing climate resilience, and increase the ability of the weather enterprise to create and distribute the knowledge needed by everyone to make weather-informed decisions.