Lake Sullivan

Lake Sullivan

Sullivan, Sullivan County, IN
0.72mi²
Directions
Lake Information

Lake Sullivan is a beautiful freshwater lake located in Sullivan County, Indiana. With a total area of 461 acres, it provides ample opportunities for outdoor recreational activities. The lake is popular for fishing, boating, swimming, and picnicking. Anglers can catch a variety of fish, including Bluegill, Largemouth Bass, Gizzard Shad, and White Crappie. The lake is a favorite among local anglers due to its abundant fish population. Lake Sullivan has several access points for boats and fishing. The lake's shoreline is dotted with small parks and picnic areas, making it a great spot for families to enjoy a day out. The lake's clear waters are ideal for swimming, and several small beaches are available for visitors to take a dip. Kayaking, canoeing, and paddleboarding are also popular activities on the lake. In addition to its recreational opportunities, Lake Sullivan is an important source of drinking water for the surrounding area. The lake is part of the Sullivan County Water Corporation's system and is regularly monitored for water quality. The lake is also home to a variety of aquatic plant and animal species, and efforts are made to maintain the lake's ecological balance. Overall, Lake Sullivan is a wonderful destination for outdoor enthusiasts looking for a fun and relaxing day out. Its peaceful surroundings, diverse fish population, and ample recreational opportunities make it a popular spot for both locals and visitors alike. Whether you are fishing, boating, or just enjoying a picnic by the shore, Lake Sullivan is sure to leave you with happy memories of your time spent there.

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Current Conditions

79°F
Feels like 82°F
Cloudy
Today's High
88°F
Today's Low
72°F

Water Temperature

69°F
Updated: (Jul 13)
Sign in to contribute temps.

Latest Water Temperature Data: Current water temperature for Lake Sullivan is 69° Fahrenheit - providing real-time thermal conditions for fishing, swimming, and water recreation planning.

Current Snapshot

Wind1 mph S (Gust 2 mph)
Pressure
29.94 inHg
Visibility11 mi
Humidity85%
Cloud Cover100%

Forecast: Wednesday, Jul 16

Day 1 of 9

Hourly Insights

7 AM
72°
29%
10 AM
76°
27%
1 PM
84°
9%
4 PM
88°
8%
7 PM
87°
46%

Temperature

High
88°F
Low
72°F

Precipitation

Chance66%
Amount0.34"
Typerain

Wind

6 mph
Avg Speed
Gusts up to
18 mph
CalmModerateStrong
Max Speed8 mph

Sun, Moon & UV

Sunrise10:37 AM
Sunset1:14 AM
Moon PhasewaningGibbous
Max UV Index8 (Very High)

Weather Forecast & Fishing Conditions at Lake Sullivan

Today's weather at Lake Sullivan features partly cloudy skies with temperatures ranging from 72°F to 88°F. Wind conditions will average 6 mph with gusts reaching up to 18 mph, creating excellent fishing conditions with calm waters. The UV index will reach 8 (Very High), and there's a 66% chance of precipitation. The current water temperature is 69°F (updated Jul 13), indicating that excellent conditions for bass and trout fishing. These conditions will significantly impact fish behavior and angling success throughout the day.

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July 3rd 2025

Weather Forecast

Wednesday

88°F
72°F

Thursday

87°F
74°F

Friday

84°F
70°F

Saturday

85°F
72°F

Sunday

85°F
73°F

Monday

87°F
72°F

Tuesday

92°F
75°F

Wednesday

92°F
76°F

Thursday

92°F
75°F
Wednesday - 7/16/2025
88°F
72°F
12am
74°F
69°F
29.93 hPa
5 mph
SSE
G: 11 mph
2am
73°F
69°F
29.94 hPa
4 mph
SSE
G: 10 mph
4am
72°F
69°F
29.94 hPa
4 mph
SSE
G: 9 mph
6am
72°F
69°F
29.91 hPa
4 mph
S
G: 10 mph
8am
73°F
69°F
29.93 hPa
5 mph
SSW
G: 13 mph
10am
76°F
69°F
29.94 hPa
6 mph
WSW
G: 12 mph
12pm
81°F
69°F
29.93 hPa
7 mph
WSW
G: 14 mph
2pm
86°F
69°F
29.90 hPa
8 mph
WSW
G: 16 mph
4pm
88°F
69°F
29.87 hPa
8 mph
WSW
G: 18 mph
6pm
88°F
69°F
29.86 hPa
8 mph
WSW
G: 16 mph
8pm
85°F
69°F
29.86 hPa
7 mph
SW
G: 15 mph
10pm
79°F
69°F
29.88 hPa
5 mph
SSW
G: 11 mph

Water Temperature History

Trends for Lake Sullivan

Current Temp

69°F

Measured on Jul 13

Latest recorded surface temperature.

Lowest in Period

40°F

On Jan 22

Coldest point in the Last 12 Months.

Average in Period

59°F

Typical temp during the Last 12 Months.

Temperature Trend: Last 12 Months

Surface temperature over the selected period.

Key Observations (Last 12 Months)

  • Warmest avg: August (82°F).
  • Coolest avg: February (40°F).
  • Rapid warming often occurs: March → April (+9°F).
  • Sharpest cooling trend: October → November (-17°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm05101520

Wind Direction

167°

Pressure

1014 mb

Cloud Cover

94%

Visibility

10 miles

Daily Pressure Forecast

WedThuFriSatSunMonTueWedThu0.008.8617.7226.5835.44
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Frequently Asked Questions About Lake Sullivan

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