Coastal State Climate Change Planning Act - Amends the Coastal Zone Management Act of 1972 to direct the Secretary of Commerce to establish a coastal climate change adaptation planning and response program to: (1) provide assistance to coastal states to voluntarily develop coastal climate change adaptation plans to minimize contributions to climate change and to prepare for and reduce the negative consequences that may result from climate change in the coastal zone, and (2) provide financial and technical assistance and training to enable coastal states to implement such plans through coastal states' enforceable policies.

Authorizes the Secretary to make grants to coastal states to develop such plans and to support projects that implement strategies contained in such plans. Requires the Secretary to promote and encourage the use of National Estuarine Research Reserves as sites for pilot or demonstration projects carried out with such grants.