Is the temperature difference between day and night at the seaside big or small?

Small. The seaside is dominated by maritime climate.

Maritime climate refers to the climate of the adjacent areas of the ocean, such as the climate of islands or parts of the mainland where the prevailing wind comes from the ocean, and the climate formed by huge water bodies in the ocean, including the climate of the ocean surface or islands and the climate of the offshore parts of the mainland where the prevailing airflow comes from the ocean.

Compared with continental climate, the main feature of maritime climate is that not only the annual and daily variation of temperature is small, but also the extreme temperature appears later than that in continental climate area. The seasonal distribution of precipitation is relatively uniform, with more precipitation days and less intensity; There are many clouds and high humidity. Judging from the annual temperature change, spring is colder than autumn, which is an obvious sign of maritime climate.

Extended data

The maritime climate has the following characteristics:

1, the annual and diurnal variations of temperature are very small, and even diurnal variations are not observed on the ocean surface. The annual extreme value is generally 1 month later than that of Chinese mainland, such as February in Leng Yue and August in the warmest month. At high latitudes, Leng Yue may be in March and the hottest month may be in September. Autumn is warmer than spring.

2. The seasonal distribution of precipitation is relatively uniform, with many days of precipitation, but the intensity is small. There are many clouds and high humidity.

3. There are many storms in the tropical ocean, such as the southwest of the North Pacific Ocean and the South China Sea of China, where typhoons are generated and strongly influenced. Tropical storm (including typhoon) is a very important meteorological disaster.

4, cloudy weather, high humidity. Most of the mainland areas near the ocean have maritime climate characteristics, and the coastal areas of western Europe are typical maritime climate areas on the mainland.

Baidu encyclopedia-maritime climate