Land and Water Effects
Water has a low albedo so absorbs heat under sunlight. Land absorbs less heat. However, water has a high heat capacity, so takes longer to warm than land.
Due to land and water effects, summers can be very hot in continental interiors (and winters very cold), while marine climates are more moderate.
On a daily basis, land near the shore heats up in the afternoon so the overlying air rises, while the adjacent ocean is relatively cool. This causes air to move from the ocean to the land to take the place of rising heated air, thus creating a sea breeze.