Newport Spring emerges from a vent at the base of a concrete wall along the east side of Old Plank Road. The spring pool measures 50ft north to south and 100ft east to west. The spring is 6 ft (1.8 m) deep near the vent. The bottom is sand and detritus. Limestone is exposed near the vent. The spring water is yellow-greenish and has a sharp odor of hydrogen sulfide. The walls and pool substrates are thickly coated with algae and iron-reducing bacteria. There is a small boil on the spring surface just out from the wall on the west side of the spring, underneath a rope swing. An old abandoned house is situated to the south approximately 300ft from the spring. An old water extraction pipe leads into the spring from the house. The spring pool is under a live oak canopy. The spring run flows east approximately 0.5 miles into the St. Marks River. Approximately 600 ft downstream from Newport Spring, a small, clear water, limestone-bottomed spring-fed stream comes in on the north side. Newport Spring Run is swift flowing over a sand and limestone bottom with abundant native aquatic vegetation. The spring and run are within forested pine flatwoods and swampy lowlands on the west side of the St. Marks River.
The spring is undeveloped and is a popular local swimming spot. Land around the spring is in private ownership.
Newport Spring is located approximately 17 miles southeast of Tallahassee near the community of Newport. From the intersection of US 319 (Capital Circle Southeast) and SR 363 (Woodville Highway) in Tallahassee, head south on SR 363 (Woodville Highway) approximately 13.2 miles (21.2 km) to the intersection of US 98 and SR 363 (Woodville Hwy). Head east (left) on US 98 for approximately 2.2 miles (3.5 km) to
Newport. From US 98 in Newport, just west of the St. Marks River Bridge, travel north (left) on Old Plank Road 0.9 miles (1.5 km). The spring is on the east (right) side of the road.