Porch swings can accommodate one to six people and the weight limits are dependent upon each model. Generally, a two-foot porch swing is ideal for a single person. A three to four-foot porch swing is great for two people. Five to six feet long porch swings can hold three to four people comfortably. For weight limits, you'll need to check the product specs. You can expect weight limits to be between 250 lbs. to 800 lbs.; though there are models that can support more weight.