Is it warmer or colder if the distance from sea is shorter during the summer and why?

Answer 1

it will usually to cooler near the sea in the summer and warmer in the winter. The sea helps reduce the extremes of temperature.

Answer 2

If you live near to the coast or on an island then maritime influences (from the sea) mean that the weather is cooler than usual in the summer and warmer than usual in the winter. This is the case in England as in the summer the sea is colder after having been cooled down the the winter months. Therefore sea winds are colder than usual reducing temperatures. In the winter the sea is warmer after having been warmed up through the summer and winds are warmer. This will slightly increase the temperature.

Answer 3

If you remember two things, everything else is commonsense.
1. Land absorbs heat faster than water.
2. Water retains heat longer than land.
Therefore we can predict temperature differences on the coast and on the continent between,
a) day and night, and
b) summer and winter.
By adding one more fact, that warm air rises and cooler air takes it's place, we can also predict whether the breeze is on or offshore during the day and night.

Sea temperatures remain constant (relatively) whilst the land surface heats or cools quickly. Remember this by touching a road surface at midday and midnight, and swimming in a lake at midday and midnight.
So land near the sea will be influenced by it's constant temperature whilst inland the only factor will be the amount of sunlight.
Continent = hot summer, cold winter
Coast = warm summer, mild winter