Tidal Range by Outer Banks Location
Why the OBX tide range drops from 3.0 ft at Duck to 1.3 ft at Hatteras — and what it means for fishing, beach driving, and flooding risk.
One of the most counterintuitive things about Outer Banks tides is that the tide range — the vertical difference between high and low water — varies dramatically along the coast. At Duck and the northern beaches, the mean range is close to 3.0 ft. By Hatteras and Ocracoke, the range has shrunk to roughly 1.3 ft. That's less than half the height. Same ocean, same moon, very different tide. This page explains why, and what it means for what you can do on the water.
OBX tide range at each NOAA station
| Location | NOAA Station | Mean range | Spring range |
|---|---|---|---|
| Duck (FRF Pier) | 8651370 | 3.0 ft | 3.5 ft |
| Kitty Hawk | (sub of Duck) | 3.0 ft | 3.5 ft |
| Nags Head | (sub of Duck) | 2.8 ft | 3.3 ft |
| Coquina Beach (Bodie) | (sub of Oregon Inlet) | 2.0 ft | 2.4 ft |
| Oregon Inlet Marina | 8652587 | 1.6 ft | 1.9 ft |
| Rodanthe / Waves / Salvo | (sub of Oregon Inlet) | 1.5 ft | 1.8 ft |
| Avon | (sub of Hatteras) | 1.3 ft | 1.6 ft |
| Buxton (Cape Point) | (sub of Hatteras) | 1.3 ft | 1.6 ft |
| Hatteras Village | 8654467 | 1.3 ft | 1.6 ft |
| Frisco | (sub of Hatteras) | 1.3 ft | 1.6 ft |
| Ocracoke (Silver Lake) | 8654792 | 1.3 ft | 1.5 ft |
Why the range shrinks south
The reduction in tide range from Duck to Hatteras is driven by two related factors:
- Continental shelf shape. The Atlantic tidal wave approaches the Mid-Atlantic from the northeast. North of Cape Hatteras, the shelf is wide and gently sloping, which amplifies the tidal range as the wave shoals. South of Cape Hatteras, the shelf narrows sharply and the Gulf Stream sits closer in, leaving less room for tidal amplification.
- Cape Hatteras as a hydraulic break. Cape Hatteras juts out into the Atlantic at the meeting point of two tidal systems. The Mid-Atlantic tidal wave dominates north of the cape; the South Atlantic Bight wave dominates to the south. They partially cancel each other at the cape, suppressing range.
Read the full mechanics in our inlets and bathymetry factor page.
What tidal range means for you
Surf fishing
Bigger range = more dramatic tide change = more water movement, which generally produces more bait activity. The northern beaches see stronger tide-driven bait runs because the volume of water moving over the bar at each cycle is larger. But the Hatteras beaches, despite the smaller range, hold structure (Cape Point, sloughs, inlets) that concentrates fish — so it's not just about range.
Beach driving
Bigger range means a wider band of hard-packed sand at low tide, but a narrower dry window between tides. On the northern OBX with a 3.0 ft range, you get a generous low-tide driving window but need to clear the beach before high tide pushes water to the dune line. On Hatteras with 1.3 ft, the hard-pack band is narrower but the timing is less aggressive.
Flooding risk
Counterintuitively, the lower-range Hatteras and Ocracoke beaches are more flood-prone, not less. Because the average high tide is closer to the dune crest in absolute elevation, less surge is needed to overwash. Hatteras Island sees more frequent Highway 12 closures than the higher-range northern beaches.
Pier fishing & paddleboarding
The smaller range at Hatteras means more usable hours per day around slack tide — better for paddleboarding in shallow water and for fishing piers where currents under the pier can become unmanageable on a strong moving tide.
Sound-side ranges are tiny
Astronomical tide range in Pamlico Sound and Currituck Sound is generally under 6 inches — the inlets are too narrow to let much of the ocean tide through. Sound-side water level is dominated by wind direction (wind tides), not the moon. A 20-knot south wind can raise water levels on the north end of Pamlico Sound by 2 to 3 ft, dwarfing any astronomical tide. See our wind and pressure factor page.