Where is Lake Matawan?

Lake Matawan is a reservoir in New Jersey.

What is the water temperature at Lake Matawan?

As of August 21, 2026, the water temperature at Lake Matawan in New Jersey is 77°F (25°C), measured by NOAA buoy SDHN4, 12 miles away.

Updated June 13, 2026

Lake Matawan

Reservoir

Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 77°F, within the comfortable 70–86°F range.

Water temperature is 77°F, within the comfortable 70–86°F range.
Heavy rain today can raise bacteria levels near outfalls and river mouths.

See full conditions ↓Can I swim today? →

Good to swimRainy today

Interactive map not available

Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 77°F, within the comfortable 70–86°F range.

Water temperature is 77°F, within the comfortable 70–86°F range. — NOAA buoy SDHN4, as of Aug 21, 10:18 PM UTC
Heavy rain today can raise bacteria levels near outfalls and river mouths.

Water temp

77°F

25°C

No official beach-advisory feed for New Jersey yet — follow posted signs and local guidance.

Live data from NOAA buoy SDHN4 (12 mi away), as of Aug 21, 10:18 PM UTC.

Live map near here →

Weather at Lake Matawan

H: 79° L: 65°

Patchy rain nearby

75°

Feels like 77°

Precipitation

84%

Humidity

75%

Wind

7 mph

UV Index

0.1

Water Conditions:

🏊Cool but swimmable🌧️Rain expected

12 AM

65°

3 AM

65°

6 AM

65°

9 AM

67°

12 PM

73°

3 PM

77°

6 PM

77°

9 PM

72°

Pack smarter for Lake Matawan

Useful gear categories for this kind of water spot. These links open Amazon search results so you can compare current options.

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Inflatable PaddleboardA popular way to explore calm coves and shorelines.

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Life JacketImportant around boats, paddling, and deeper swimming areas.

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Floating CoolerKeeps drinks nearby for swim areas, docks, and boats.

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Waterproof Phone PouchProtects phones around docks, boats, and splashy shorelines.

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Frequently asked questions

Where is Lake Matawan?: Lake Matawan is a reservoir in New Jersey.
What is the water temperature at Lake Matawan?: As of August 21, 2026, the water temperature at Lake Matawan in New Jersey is 77°F (25°C), measured by NOAA buoy SDHN4, 12 miles away.
Can you swim at Lake Matawan?: Comfortable for a swim today: water temperature is 77°F, within the comfortable 70–86°F range. Checked August 21, 2026.

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Best Times to Visit

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Right Now

Not ideal for outdoor activities today

🏞️ 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

New Jersey

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