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Photo: Lake Arrowhead precipitation by Banaticus (CC0) License

Arrowhead Lake

Lake · Denville, New Jersey

5.0(4 reviews)
Cool today

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Current water conditions

Water temp
76°F
24°C
Comfortable for a swim today. The water's in a comfortable range. Still check depth, currents, and the forecast, and follow any posted advisories before getting in.

Live data from NOAA buoy BATN6 (27 mi away), as of Aug 21, 9:18 AM UTC. Conditions are for general information only and can change quickly — always judge the water in person and follow posted advisories before swimming.

Weather at Arrowhead Lake

H: 78° L: 62°
Light drizzle
Light drizzle
62°
|
Feels like 61°
Precipitation
85%
Humidity
80%
Wind
5 mph
UV Index
0
Water Conditions:
🥶Too cold for most swimmers🌧️Rain expected
12 AM
Light drizzle
64°
3 AM
Light drizzle
63°
6 AM
Light drizzle
62°
9 AM
Patchy rain nearby
66°
12 PM
Patchy rain nearby
72°
3 PM
Overcast
78°
6 PM
Overcast
74°
9 PM
Overcast
67°

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Frequently asked questions

Where is Arrowhead Lake?
Arrowhead Lake is a lake in Denville, New Jersey.
What is the water temperature at Arrowhead Lake?
As of August 21, 2026, the water temperature at Arrowhead Lake in Denville, New Jersey is 76°F (24°C), measured by NOAA buoy BATN6, 27 miles away.
Can you swim at Arrowhead Lake?
There is no fixed answer for Arrowhead Lake: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Arrowhead Lake in Denville, New Jersey. Check current water conditions before you go, and follow posted signs and local guidance.
How is Arrowhead Lake rated?
Arrowhead Lake in Denville, New Jersey has an average visitor rating of 5 out of 5, based on 4 reviews.

Visitor Reviews

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Best Times to Visit

🧥
Right Now
Cool weather - dress warmly
🏞️ Lakes Tips:
  • Check for boat launch facilities and fees
  • Obtain required fishing licenses before arrival
  • Be aware of lake-specific regulations and restrictions
  • Monitor water quality reports before swimming
Best Seasons:
☀️ Summer (Jun-Aug)🍂 Fall (Sep-Nov)🌸 Spring (Mar-May)

Location & Contact

Denville, NJ 07834

Denville, New Jersey 07834

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