Lake Decatur

Lake Decatur

Decatur, IL

74°F
79°
10 mph82°/65°

Right Now

79°

Mostly Clear

Water

74°

Wind

10 mph

S

Gusts

19 mph

Pressure

29.99

falling

Forecast - Fri, Jun 5

7am
68°
10am
76°
1pm
79°
4pm
81°

High / Low

82° / 65°

Wind

12 mph

gusts 26 mph

Precip

59%

UV

5

Sunrise

10:28 AM

Sunset

1:20 AM

Today Read

Lake Decatur

Wind read

Moderate

12 mph avg

Water read

74°

Warm-water bite

Air range

65° / 82°

today

Precip

59%

watch timing

Today's forecast for Lake Decatur has moderate wind, 65F to 82F air temperatures, 59% chance of precipitation, and 74F water.

AI lake plannerShort window onlyChecking questions

Ask what to do at Lake Decatur today.

The planner reads this page's water temp, forecast, fish species, solunar timing, reports, and imagery context so you can decide what to throw, when to go, and when to move.

Today's AI read

Warm-water pattern for Largemouth bass / Smallmouth bass

53 confidence

Warm water pushes the plan toward oxygen, shade, depth changes, and low light. Wind is not the main constraint, so timing and presentation can drive the plan. With a weak solunar score, favor stable weather windows.

Uses this lake data

Current water temp: 74°FWater temp history: 475 readingsHourly weather: 224 hoursSolunar timing: 2/5Fish species: 9 listedSatellite imagery: 219 captures

Trip read from the AI planner

Fishing Forecast

waning gibbous

2/5

Major

9:22 AM - 11:52 AM

Minor

5:00 AM - 5:00 AM

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June 2, 2026

Fish Species

9

Water Temperature History

Current

81°

Jun 14

Low

33°

Nov 30

Average

57°

Last 12 Months

Warmest avg: June (72°F)

Coolest avg: January (33°F)

Rapid warming: AprilMay (+11°F)

Sharpest cooling: SeptemberOctober (-11°F)

Weather Forecast

Wind speed, gusts, and pressure trends for trip timing.

Hourly Wind Forecast

5

12am - 11pm

Wind SpeedWind Gust
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Peak Wind

17 mph

12pm

Peak Gust

26 mph

highest gust

Pressure

30.01 inHg

steady

Visibility

14 mi

20% clouds

Tap chart for details, swipe left or right for different days.Tap chart for details • Swipe for different days

Daily Pressure Forecast

Pressure
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Nearby Lakes

FAQ

About Lake Decatur

Lake Decatur covers 2905.00 acres (4.54 square miles) with a maximum depth of 6.71 meters (~22 feet).

Lake Decatur is located in Decatur, Macon County, IL. It is accessible to the public for outdoor activities.