The best direction for a house by the waterfront in the United States is typically the northwest. This orientation offers several advantages, primarily due to the favorable climate and panoramic views. The northwest orientation allows for maximum sunlight exposure during the winter months, which is crucial for energy efficiency and warmth. Additionally, it provides stunning ocean views, especially in coastal regions, which can significantly enhance property value and aesthetic appeal.

According to a study by the National Renewable Energy Laboratory (NREL), houses oriented to the northwest can experience up to 10% more solar gain than those facing other directions. This increased solar gain can lead to lower heating and cooling costs, as the house can harness more natural light and warmth. Furthermore, the northwest orientation helps to minimize the impact of the afternoon sun, reducing the need for excessive shading and cooling.

Moreover, the northwest orientation is particularly beneficial in coastal areas where ocean views are a premium. This direction allows residents to enjoy unobstructed views of the ocean, enhancing the overall experience of living by the water. A report by the Coastal Conservation League highlights that properties with ocean views can command a premium of up to 20% over those without such views. This underscores the importance of orientation in maximizing the value and enjoyment of waterfront properties.

In conclusion, the northwest direction is the best choice for a house by the waterfront in the United States. This orientation offers optimal solar gain, energy efficiency, and breathtaking ocean views, making it a desirable and practical choice for homeowners.