Why are coastal areas cooler during the day than inland areas?

Coastal areas are cooler during the day than inland areas primarily due to the influence of ocean water, which has a high heat capacity and moderates temperature fluctuations. Sea breezes develop as the land heats up more rapidly than the water, causing cooler air from the ocean to flow inland. This process helps maintain lower temperatures in coastal regions compared to hotter, drier inland areas. Additionally, the presence of water bodies contributes to higher humidity, which can also affect perceived temperatures.