Nassau Sound: depth, boat ramps and water quality

Boat: 1 ramp or launch on file for this water.
Start here: Launch at Big Talbot Island State Park Boat Ramp, 1 lane, concrete.

The estuary

Nassau Sound covers 2,158 acres in Florida, across 2 counties: Duval and Nassau. It is an estuary: the deepest point measured is 27.9 feet (8.5 m). Our records hold 17 species for this water.

Depth: down to 27.9 ft at the deepest measured point

Deepest measured point: 27.9 ft (8.5 m). We hold 30 depth contours for this water, drawn from 5,799 soundings.

View of George Grady bridge from Nassau Sound bridge 1.jpg
Michael Rivera · CC BY-SA 4.0

1 ramp or launch on this water

On this water we hold 1 trailer ramp and 1 bridge you can fish.

  • Big Talbot Island State Park Boat Ramp — 1 lane, concrete, parking for 31 trailers (paved), paid, open around the clock, flush restrooms, dock, restrooms, wheelchair access. Jacksonville, Florida Department of Environmental Protection. 12157 Heckscher Drive, Jacksonville 32226 · website floridastateparks.org/parks-and-trails/big-talbot-island-state-park

Bridges you can fish from

View of George Grady bridge from Nassau Sound bridge 2.jpg
Michael Rivera · CC BY-SA 4.0
  • George Crady Bridge Fishing Pier State Park — park entry fee, open 8am–sunset, bait and tackle on site, restrooms, drinking water, monofilament recycling bin, wheelchair access. Jacksonville, FL Department of Environmental Protection, State Parks. 12157 Heckscher Dr., Jacksonville 32034

Only one of the 2 places listed has both a fee and opening hours on file: a blank means we hold no such field, not that it is free or always open, and this list may not be complete.

Water and conditions

Our water temperature readings average 60°F; they do not cover the whole year, so this is not a yearly average. pH averages 8.1. These readings span 2017–2018. The latest reading is from 2018, more than three years ago: read these numbers as history, not as the water today.

What is hard here

Only 1 public ramp is on file, so the launch decides where you fish.

Where this data comes from

  • NOAA Digital Coast — NOAA Digital Coast bathymetric lidar: class A, a survey of the bottom.
  • NOAA ENC — NOAA Electronic Navigational Charts: soundings: class A, a survey of the bottom.
  • NOAA ENC — NOAA Electronic Navigational Charts: depth contours: class A, a survey of the bottom.