There is no significant difference in temperature between the daytime and nighttime in coastal areas. Why?

Question

Accepted Answer

In coastal areas, the specific heat capacity of seawater is much higher than that of land. During the day, sea breeze from the cooler sea moderates the land's high temperature, and at night, land breeze from the relatively warmer sea moderates the land's low temperature. This continuous moderating effect keeps the day-night temperature difference small.