Salt spray from either the ocean or street de-icing can be a problem locally, and some species are more sensitive to it than others. Where these are problems, ask a certified arborist, nursery professional, urban forester, or extension agent about which trees to avoid. After choosing a species that will grow well in your environment, your next consideration is where the tree should be planted is the next consideration. Providing shade is why many people plant trees. Trees provide a greater cooling effect than man-made structures because they not only block the rays of the sun, they add water to the air through transpiration.
Observation is the best way to determine where to plant to maximize shade.
Position the tree where you want the shadow during the hottest time of the year and the time of day you desire the shade. Pre-plan where you will plant your trees. One good principle is to never locate a tree where it will split your lot or a view into equal halves. Another is to use your trees to enhance the house and lot. For example, to give the lot an appearance of greater depth, plant on a diagonal line outward from the front corners of the house.