This work investigates law as an instrument to deal with the challenges of sea level rise. As the two countries chosen as examples differ significantly in their adaptation strategies and the corresponding legal regulations, the author presents general ideas on how any legal framework facing similar challenges could be improved. In particular, (flood) risk assessments, coastal defences and flood-resistant design as well as spatial and land use planning are discussed, including managed retreat. Moreover, conflicts as well as potential synergies of coastal adaptation and nature conservation are examined.