9.08 ft local staff-gauge stage ft
level 0.1 ft above full pool — unusually high for late September
Reading comes straight from U.S. Geological Survey National Water Information System (USGS gauge 01455400) and updates live when you load this page.
Is Lake Hopatcong full?
Yes, and then some — 0.1 ft above full pool as of September 24, 2026
How full is Lake Hopatcong? Not as a percentage: no storage figure comes through with this gauge reading, and a share of capacity worked out from the elevation alone would be a guess — how much water a reservoir holds at a given level is a curve only the operator's own capacity table knows. Feet from full pool is what the operator publishes, and it is the figure above.
Lake Hopatcong through the year
The band is the lake's own normal: where the level has run on each calendar day, 2013–2026. 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)
- 2017 (wettest on record)
- 2015 (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 | 9.00 ft local staff-gauge stage ft · per NJDEP (dam and water level plan); USGS gauge full-pool reference |
|---|---|
| Gauge | USGS gauge 01455400 · U.S. Geological Survey National Water Information System |
| Datum | local staff-gauge stage ft — Hopatcong is quoted in feet on the dam gauge, where 9.0 ft is full: the state holds it near 9.0 ft from May 1 to November 19, draws it 22-26 inches every winter, and 5 ft every fifth year (next 2028). |
| Last verified | August 15, 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
What is the lake level for Lake Hopatcong today?
Lake Hopatcong is at 9.08 ft (local staff-gauge stage ft) as of September 24, 2026 — 0.1 ft above full pool — unusually high for late September.
Is Lake Hopatcong full?
Yes and then some — at 9.08 ft on September 24, 2026, Lake Hopatcong is 0.1 ft above its full pool of 9.00 ft (local staff-gauge stage ft), using flood storage.
How full is Lake Hopatcong?
Not as a percentage: no storage figure comes through with this gauge reading, and a share of capacity worked out from the elevation alone would be a guess — how much water a reservoir holds at a given level is a curve only the operator's own capacity table knows. Feet from full pool is what the operator publishes, and it is the figure above.
What is full pool for Lake Hopatcong?
Full pool (the conservation pool) for Lake Hopatcong is 9.00 ft local staff-gauge stage ft, per NJDEP (dam and water level plan); USGS gauge full-pool reference. Levels above it use flood storage; levels below it are drawdown.