Coastal State Climate Change Planning Act of 2008 - Amends the Coastal Zone Management Act of 1972 to establish a coastal climate change adaptation planning and response program to provide assistance to coastal states to voluntarily develop coastal climate change adaptation plans and to provide financial and technical assistance and training to enable coastal states to implement those plans through coastal states' enforceable policies.
Authorizes, subject to the availability of appropriations, grants to coastal states for developing the plans and grants for implementation.