The shelf life of spinach dip depends on various factors such as the ingredients used, storage conditions, and whether it's homemade or store-bought. Typically, spinach dip will last for about 3 to 5 days when stored properly in the refrigerator. However, it's essential to check for any signs of spoilage such as a sour smell, mold growth, or changes in texture before consuming it. If you're unsure, it's best to err on the side of caution and discard the dip if it appears to be off.