New JerseyReservoir, 2,494 acres
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9.06ft
Down 0.10 ft this week
Sailing
CheckingReading the forecast
Kayak and SUP
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Power boating
CheckingReading the forecast
Fishing
CheckingReading the forecast
Outlook. Monday: WNW wind 2 to 6 kt, gusts to 11 kt, high near 68°F. Tuesday: NNE wind 0 to 3 kt, gusts to 10 kt, high near 59°F.
7-day wind forecastLoads when you scroll here
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Last hour of NOAA MRMS radar, 1 km resolution. Map data © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap.
9.06ft (gage datum)
-0.10 ft in 7 days1.16 ft above the October normal
Reading from Oct 26, 2026. Shaded band: range of October averages on record; dashed line is the typical level.
Lake Hopatcong was at 9.06 ft on the gage on October 26, falling 0.10 ft over the past week. That is well above normal for October: the typical October level is 7.90 ft, so the lake is 1.16 ft above its usual mark.
Background reading: Lake Hopatcong on Wikipedia
Set in New Jersey, Lake Hopatcong is a 2,494-acre reservoir.
We read the level from USGS gauge 01455400, listed as Lake Hopatcong at Landing NJ. Wind and weather come from the National Weather Service grid cell over the lake, so the numbers describe open water rather than the nearest airport.
It is big enough for a proper sail but small enough that waves rarely get serious. Gusts off the shoreline are usually the bigger story than wave height. Reservoir levels move with releases and inflow, so ramps and beaches can change week to week. The water level page tracks that day by day.
The go or no-go calls above are a starting point, not a guarantee. Read how we score conditions, and always check local rules and posted warnings before you launch.
The National Weather Service forecast for the lake from October 26: Monday: WNW wind 2 to 6 kt, gusts to 11 kt, high near 68°F. The panel at the top of this page refreshes the current wind, gusts and direction when you open it and turns them into a call for sailing, paddling, power boating and fishing.
Lake Hopatcong was at 9.06 ft on the gage on October 26, falling 0.10 ft over the past week. That is well above normal for October: the typical October level is 7.90 ft, so the lake is 1.16 ft above its usual mark.
Lake Hopatcong covers about 2,494 acres (3.9 square miles) of surface water.
If Hopatcong is blown out, these are the closest alternatives. Tap through for their conditions.