Thailand is an example of a country with has the long coast, with a length of about, 2490 kilometres and a source of great significance to the economy of a country, especially the fisheries and aquaculture. And the uncertainties of seasonal are the main affect to agriculture system. The forecast of sea level will be rise 1 meter within the next decade will affect to sandy beaches and coastal areas in Thailand are decreased. And it will be direct affect to tourism industry such as Pattaya, Ranong and also Bangkok will not avoid the impact of sea level rise.