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Greenwood Lake Water Level Today

Daily level, distance to full pool and history for Greenwood Lake, on the Wanaque River in New Jersey.

Updated · Source: USGS 01383000 Provisional

Water level Provisional

618.90ft

msl · 9:15 AM EST, Nov 9, 2026

  • 0.04 ftabove full pool (618.9 ft)
  • −0.01 ftin 24 h+0.03 ft in 7 days+0.04 ft in 30 days
618620622618620622
  • Full pool
  • 1 yr ago

Is Greenwood Lake full?

Yes. Greenwood Lake is at full pool and 0.04 ft into its flood pool.

Greenwood Lake level history

Full pool 618.9 ft
View data table
DateLevel (ft)
Nov 9, 2026618.90
Nov 8, 2026618.92
Nov 7, 2026618.92
Nov 6, 2026618.90
Nov 5, 2026618.88
Nov 4, 2026618.88
Nov 3, 2026618.88
Nov 2, 2026618.87
Nov 1, 2026618.87
Oct 31, 2026618.89
Oct 30, 2026618.90
Oct 29, 2026618.90
Oct 28, 2026618.91
Oct 27, 2026618.93
Oct 26, 2026618.94
Oct 25, 2026618.95
Oct 24, 2026618.97
Oct 23, 2026619.00
Oct 22, 2026619.01
Oct 21, 2026619.02
Oct 20, 2026619.03
Oct 19, 2026619.04
Oct 18, 2026619.05
Oct 17, 2026619.07
Oct 16, 2026619.06
Oct 15, 2026619.05
Oct 14, 2026619.08
Oct 13, 2026619.09
Oct 12, 2026619.10
Oct 11, 2026618.94
Oct 10, 2026618.86
  • Greenwood Lake level
  • Full pool 618.9 ft
  • Above full pool
Source: USGS · Daily averages since 2021

Greenwood Lake on Nov 9 in past years

Greenwood Lake water level on Nov 9 in past years
YearLevel (ft)vs todayvs full pool
2026today618.90—+0.04 ft
2025618.30−0.60−0.56 ft
2024618.43−0.47−0.43 ft
2023619.05+0.15+0.19 ft
2022618.70−0.20−0.16 ft
2021617.60−1.30−1.26 ft

Today’s level is the highest for this date since 2023.

Lake facts

Full pool (conservation pool)
618.9 ft msl
Highest since 2021
620.72 ftDec 18, 2023
Lowest since 2021
613.90 ftDec 5, 2021
Data since
Sep 30, 2021
Dam
Greenwood Lake Damcompleted 1928
River
Wanaque River
Owned by
North Jersey District Water Supply Commission
Dam location
Passaic County
Gauge location
41.1617, −74.3333

Dam, river and owner from the National Inventory of Dams (USACE). Records cover Sep 30, 2021 to today (daily averages).

Greenwood Lake map and depth

  • Level gauge
Shoreline © OpenStreetMap contributors · Open the full map
Average depth when full
about 11 ftcapacity ÷ surface area
Surface area
about 1,890 acresmeasured on the OpenStreetMap outline
Height of Greenwood Lake Dam
20 ftNational Inventory of Dams

The outline shows the mapped shoreline, not today’s water line: when the lake is low, the water stands back from it.

Weather on the lake

  1. Today56°FHighLow 39°FNW 9–14 mphMostly Sunny
  2. Tonight39°FLowW 2–7 mphPartly Cloudy
  3. Tuesday61°FHighLow 40°FW 2–7 mphMostly Sunny
  4. Wednesday61°FHighLow 39°FW 0–5 mphSunny
  5. Thursday57°FHighLow 38°FE 1–5 mphChance Light Rain
  6. Friday48°FHighLow 33°FN 9 mphLight Rain
  7. Saturday47°FHighLow 32°FNW 10 mphChance Light Rain

Forecast: National Weather Service for the dam area (41.16, −74.33). Wind speeds are forecasts, not measurements.

Nearby lakes

Quick answers

What is the full pool level of Greenwood Lake?
618.9 ft above mean sea level, the top of its conservation pool. Above it, water is released or flows over the spillway of Greenwood Lake Dam.
Is Greenwood Lake above full pool?
Yes. On Nov 9, 2026 it was 0.04 ft above full pool, in the flood pool. Operators release that water downstream when conditions allow.
How deep is Greenwood Lake?
Greenwood Lake is about 11 ft deep on average when full: 21,052 acre-ft of storage spread over about 1,890 acres of surface. As in most reservoirs, the deepest water is in the old river channel near Greenwood Lake Dam.
Is Greenwood Lake rising or falling?
It is steady: +0.03 ft in the last 7 days and −0.01 ft in 24 hours, to 618.90 ft on 9:15 AM EST, Nov 9, 2026 (US Geological Survey).
What is the highest level in our data?
Greenwood Lake reached 620.72 ft on Dec 18, 2023. The lowest was 613.90 ft on Dec 5, 2021 (USGS data since 2021; older records are not in this data set).
How much has Greenwood Lake changed in the last year?
In the last 12 months it ranged from 618.31 ft (Nov 19, 2025) to 619.60 ft (Mar 9, 2026), a swing of 1.29 ft.
How often is this page updated?
This page is updated several times a day with the latest reading from US Geological Survey. The last reading is from 9:15 AM EST, Nov 9, 2026.

Where this data comes from

Reservoir gauge 01383000 of the US Geological Survey (waterdata.usgs.gov). Recent readings are provisional and may be revised. Weather from the National Weather Service. Dam details from the National Inventory of Dams.

Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.