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LakeMonster.com is a BETA data site created to help lake enthusiasts of all kinds by combining the latest satellite imagery, weather data, lake staff information, and community member reports to communicate current lake conditions.
Check the map below for point temperatures. Drought conditions and low water levels are affecting smaller lake temperature accuracy. We are working to resolve the issue. Please help others by submitting your observed temperatures.
Lake Hopatcong , NJ
GPS: 40.942, -74.624 Google Map · LakeMonster Map
Views: 1020
Favorited: 3
~ 200 miles away - (2487)
Today's Forecast Oct 20, 2021
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Lake Hopatcong's current water temperature is 45°F. Today's forecast is: , with a high around 72°F and a low around 50°F. Winds are out of the W at 7 mph with gusts of 23 mph.

Current Conditions
45°F
Water estimate as of
Oct 12, 2021
72° 50° F
Air
WNW 7 - 23 gust
Wind
Temps are estimates of the surface temp acquired throughout the lake. Values are generally within a few degrees, but may be inaccurate due to factors including cloud cover, land interference, water levels, and input data quality/accuracy. If a temp is inaccurate, please contact us. Consider helping us improve our accuracy by creating an account and submitting your observed water temps in the section below.


Community Water Temps
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Latest satelite temp: 45°F
45°F
  Warning: Greater than 10% difference.




Forecast as of Oct 20, 2021
gust  
5  
6+  
11+  
16+  
21+
Tuesday
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72° 49°
W 7-23 mph

Clear throughout the day.
Wednesday
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70° 53°
SW 6-24 mph

Partly cloudy throughout the day.
Thursday
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64° 45°
WNW 6-25 mph

Mostly cloudy throughout the day.
Friday
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56° 38°
NW 5-15 mph

Mostly cloudy throughout the day.
Saturday
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54° 47°
W 6-26 mph

Partly cloudy throughout the day.
Sunday
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63° 46°
SSW 6-26 mph

Rain starting in the afternoon.
Monday
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47° 41°
NNW 11-33 mph

Light rain until evening.
Tuesday
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50° 44°
NNW 10-30 mph

Possible light rain in the afternoon.
Latest Satellite Imagery
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Description
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Lake Hopatcong is the largest freshwater body of water in New Jersey, located in Morris County.

Related sites:
www.state.nj.us

Attributes
Acres 2,494
Base Elevation 935 Ft
Pressure
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Nearby Lakes
Water: 42° H: 73° L: 48°
Wind 6-20 mph
Cranberry Lake Clear throughout the day. 10 miles from Lake Hopatcong Byram Township, NJ
Water: 51° H: 73° L: 52°
Wind 7-26 mph
Splitrock Reservoir Clear throughout the day. 14 miles from Lake Hopatcong Buck Mountain, NJ
Water: 48° H: 71° L: 49°
Wind 6-19 mph
Budd Lake Clear throughout the day. 14 miles from Lake Hopatcong Budd Lake, NJ
Water: 46° H: 73° L: 52°
Wind 7-26 mph
Oak Ridge Reservoir Clear throughout the day. 15 miles from Lake Hopatcong Oak Ridge, NJ
Water: 45° H: 72° L: 52°
Wind 7-25 mph
Green Pond Clear throughout the day. 15 miles from Lake Hopatcong Green Pond, NJ
Water: 49° H: 71° L: 52°
Wind 7-25 mph
Canistear Reservoir Clear throughout the day. 22 miles from Lake Hopatcong Highland Lake, NJ
Water: 47° H: 72° L: 53°
Wind 7-24 mph
Clinton Reservoir Clear throughout the day. 22 miles from Lake Hopatcong Clinton, NJ
Water: 51° H: 76° L: 55°
Wind 7-24 mph
Wanaque Reservoir Clear throughout the day. 30 miles from Lake Hopatcong Wanaque, NJ
Water: 51° H: 76° L: 55°
Wind 7-23 mph
Pompton Lake Clear throughout the day. 30 miles from Lake Hopatcong Pompton Lakes, NJ
Water: 40° H: 76° L: 55°
Wind 7-24 mph
Point View Reservoir Clear throughout the day. 31 miles from Lake Hopatcong Wayne, NJ
Water: 47° H: 71° L: 53°
Wind 8-25 mph
Upper Greenwood Lake Clear throughout the day. 32 miles from Lake Hopatcong Upper Greenwood Lake, NJ
Water: 50° H: 73° L: 55°
Wind 8-24 mph
Greenwood Lake Clear throughout the day. 34 miles from Lake Hopatcong Hewitt, NJ
Water: 53° H: 75° L: 55°
Wind 7-23 mph
Monksville Reservoir Clear throughout the day. 34 miles from Lake Hopatcong Monksville, NJ
Water: 51° H: 73° L: 51°
Wind 7-20 mph
Round Valley Reservoir Clear throughout the day. 41 miles from Lake Hopatcong Lebanon, NJ
Water: 52° H: 74° L: 49°
Wind 6-18 mph
Spruce Run Reservoir Clear throughout the day. 41 miles from Lake Hopatcong Hampton, NJ
Water: 49° H: 71° L: 48°
Wind 6-17 mph
Merrill Creek Reservoir Clear throughout the day. 45 miles from Lake Hopatcong Allens Mills, NJ
Water: 48° H: 77° L: 56°
Wind 5-17 mph
Oradell Reservoir Clear throughout the day. 51 miles from Lake Hopatcong Oradell, NJ
Water: 53° H: 72° L: 54°
Wind 8-28 mph
Lake Sebago Clear throughout the day. 51 miles from Lake Hopatcong Bear Mountain, NY
Water: 49° H: 77° L: 54°
Wind 7-22 mph
Lake Tappan Clear throughout the day. 54 miles from Lake Hopatcong River Vale, NJ
Water: 50° H: 72° L: 54°
Wind 8-29 mph
Lake Welch Clear throughout the day. 56 miles from Lake Hopatcong Haverstraw, NY

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