Where is Brandenburg Lake?

Brandenburg Lake is a lake in Illinois.

What is the water temperature at Brandenburg Lake?

As of August 22, 2026, the water temperature at Brandenburg Lake in Illinois is 74°F (23°C), measured by NOAA buoy 45186, 19.8 miles away.

Updated June 13, 2026

Brandenburg Lake

Lake

Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 74°F, within the comfortable 70–86°F range.

Water temperature is 74°F, within the comfortable 70–86°F range.

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Good to swimCool today

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Comfortable for a swim today

Good to swim

Comfortable for a swim today: water temperature is 74°F, within the comfortable 70–86°F range.

Water temperature is 74°F, within the comfortable 70–86°F range. — NOAA buoy 45186, as of Aug 22, 10:00 AM UTC

Water temp

74°F

23°C

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

Live data from NOAA buoy 45186 (19.8 mi away), as of Aug 22, 10:00 AM UTC.

Live map near here →

Weather at Brandenburg Lake

H: 84° L: 63°

Clear

63°

Feels like 63°

Precipitation

Humidity

93%

Wind

7 mph

UV Index

Water Conditions:

🥶Too cold for most swimmers

12 AM

68°

3 AM

66°

6 AM

63°

9 AM

69°

12 PM

78°

3 PM

84°

6 PM

74°

9 PM

67°

Pack smarter for Brandenburg Lake

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 Brandenburg Lake?: Brandenburg Lake is a lake in Illinois.
What is the water temperature at Brandenburg Lake?: As of August 22, 2026, the water temperature at Brandenburg Lake in Illinois is 74°F (23°C), measured by NOAA buoy 45186, 19.8 miles away.
Can you swim at Brandenburg Lake?: Comfortable for a swim today: water temperature is 74°F, within the comfortable 70–86°F range. Checked August 22, 2026.

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Best Times to Visit

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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

Illinois

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