Currently, climate change poses one of the most significant global challenges we face. The rise in average global temperature and the occurrence of extreme weather events have the potential to result in natural disasters such as sea level rise, floods, droughts, and storms, which can negatively impact society. In developing countries, the agricultural sector plays a vital role in driving economic growth and sustaining social well-being. A decrease in crop productivity serves as strong evidence of impact of climate change on food insecurity. Uncertainty of climate conditions are also increasingly influential in determining crop yields. This paper aims to project climate data for the year 2040 and 2060 by using the shared socio-economic pathway (SSP) 585 to evaluate land suitability for rice, rubber, and cassava in Rayong province. The projected climate data illustrates a trend toward rising temperatures and small changes in rainfall. Ecocrop model is used to predict the level of suitability for rice, rubber, and cassava which requires the projected climate data as input parameter. Results reveal the increase in area of suitability in 2060 in comparison with those of 2040 for rice and rubber, especially in the eastern part of Rayong. While suitability level of cassava is changed from excellence to very suitable in western districts of the province. These findings can be utilized in long-term policy and planning efforts to optimize the productivity of agricultural land in the province.