421.20 ft above mean sea level
96% full share of conservation capacity, as reported with the gauge reading
level 0.8 ft below full pool — typical for mid-August
Reading from Texas Water Development Board — Water Data for Texas (Water Data for Texas — jacksonville); it refreshes with each site update rather than live.
Lake Jacksonville through the year
The band is the lake's own normal: where the level has run on each calendar day, 1999–2026. The summer drawdown — and how this year sits in it — shows up without reading a single number.
This year vs the years that matter
This year's trace against last year and the driest and wettest years on record — the drought-context question every lake regular asks.
- 2026 (this year)
- 2025 (last year, wettest on record)
- 2011 (driest on record)
Full pool, datum, and the gauge
"Full pool" here means the conservation pool — the level the lake is designed to hold for water supply and recreation, not the flood-control space above it. The full explainer covers flood pool and dead pool too.
| Full pool | 422.00 ft above mean sea level · per Water Data for Texas — Lake Jacksonville |
|---|---|
| Conservation capacity | 25,670 acre-feet · per Water Data for Texas — Lake Jacksonville |
| Gauge | Water Data for Texas — jacksonville · Texas Water Development Board — Water Data for Texas |
| Datum | ft above mean sea level |
| Last verified | August 20, 2026 |
LakeDates reports lake level, not ramp status. Whether a given ramp or marina is usable at this level varies ramp by ramp — call the marina before you tow.
Quick answers
How full is Lake Jacksonville right now?
Lake Jacksonville is at 421.20 ft (above mean sea level) as of August 20, 2026 — 0.8 ft below full pool — typical for mid-August The lake is holding 96% of its conservation capacity.
What percent full is Lake Jacksonville?
As of August 20, 2026, Lake Jacksonville is holding 96% of its conservation capacity, per Water Data for Texas — Lake Jacksonville.
Is Lake Jacksonville full?
Not quite — at 421.20 ft, Lake Jacksonville is 0.8 ft below its full pool of 422.00 ft (above mean sea level). The lake is holding 96% of its conservation capacity.
What is full pool for Lake Jacksonville?
Full pool (the conservation pool) for Lake Jacksonville is 422.00 ft above mean sea level, per Water Data for Texas — Lake Jacksonville. Levels above it use flood storage; levels below it are drawdown.