Lake Ronkonkoma

Lake Ronkonkoma

Islip, Suffolk County, NY
0mi²
ft
Directions
Lake Information

Lake Ronkonkoma, a natural wonder formed by ancient glaciers, stands as a symbol of Long Island's freshwater beauty. As the largest and most iconic of the island's freshwater lakes, it offers a serene escape from the hustle and bustle of modern life. This irregularly shaped lake presents an intriguing blend of deep basins and shallow waters, with depths reaching up to 65 feet, making it an exceptional rarity on Long Island. Situated in the heart of Suffolk County within the Town of Islip, Lake Ronkonkoma's unique appeal stems from its distinctive physical features and abundant aquatic life. The lake covers an area of 243 acres, and its meandering shoreline stretches for 2.23 miles, creating a picturesque setting that attracts both anglers and nature enthusiasts. Access to the lake is conveniently provided at various points. For those who prefer to explore it by boat, the New York Department of Environmental Conservation (DEC) maintains an angler parking area and a concrete boat ramp on the west side of the lake, ensuring that boaters and fishermen have easy access to its pristine waters. The DEC also collaborates with Suffolk County Parks to offer a 100-foot accessible fishing pier located on the north end of the lake. This fishing pier is an ideal spot to cast your line and is renowned for being close to some of the lake's prime fishing habitats. The majority of the lake's shoreline is nestled within the Lake Ronkonkoma County Park. Anglers are welcome to fish from the Suffolk County Park property, provided they hold a Suffolk County Green Key. This unique permit helps protect the park's natural beauty and may be subject to seasonal fees for parking in certain areas. Lake Ronkonkoma's waters are home to a variety of fish species, making it a favored destination for anglers. The primary gamefish include largemouth bass and smallmouth bass. While locating these fish can be a challenge due to the scarcity of natural structure, the lake has gained a reputation for producing large bass specimens. To enhance the habitat for these fish, stumps have been thoughtfully placed within the lake. In addition to the bass, Lake Ronkonkoma's residents include chain pickerel, bluegill, pumpkinseed, black crappie, yellow perch, white perch, carp, brown bullhead, and walleye. The walleye, introduced to control the growing white and yellow perch populations, now offers a targeted fishery. Visitors to Lake Ronkonkoma will find an oasis of natural beauty and a sanctuary for those seeking a memorable fishing experience. The lake's history, unique geological features, and abundant aquatic life have combined to create a haven for anglers and outdoor enthusiasts in the heart of Suffolk County.

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Current Conditions

62°F°
Feels like 62°F°
Cloudy
Today's High
71°F°
Today's Low
60°F°

Water Temperature

65°F
Updated: (May 13)
Sign in to contribute temps.

Current water temperature for Lake Ronkonkoma is 65°F.

Current Snapshot

Wind6 mph ESE (Gust 14 mph)
Pressure
29.99 inHg
Visibility8 mi
Humidity91%
Cloud Cover93%

Forecast: Thursday, May 15

Day 1 of 9

Hourly Insights

7 AM
62°F°
10%
10 AM
65°F°
1 PM
66°F°
4 PM
70°F°
27%
7 PM
68°F°
9%

Temperature

High
71°F°
Low
60°F°

Precipitation

Chance77%
Amount0.04"
Typerain

Wind

3mph
Avg Speed
Gusts up to
10mph
CalmModerateStrong
Max Speed6 mph

Sun, Moon & UV

Sunrise9:35 AM
Sunset12:03 AM
Moon PhasewaningGibbous
Max UV Index4 (Moderate)

Solunar Fishing Forecast

Action Rating
2/5

Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)

Major Times (Best)

6:19 AM - 8:49 AM

9:05 PM - 11:35 PM

Minor Times (Good)

4:00 AM - 4:00 AM

10:36 AM - 12:06 PM

Outlook for Thursday at Lake Ronkonkoma

Expect temperatures ranging from 60°F to 71°F. There's a 77% chance of rain, potentially bringing around 0.04" rain. Winds will be averaging 3 mph, with potential gusts reaching up to 10 mph. The maximum UV index will be 4 (Moderate), so plan sun protection accordingly. For anglers, today's fishing action is rated 2/5 (Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)). Look for the best bite times during the major periods around 6:19 AM and 9:05 PM, or try the minor windows near 4:00 AM and 10:36 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for Lake Ronkonkoma.

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May 15th 2025

Lake Information

Elevation
N/A
Area
0 mi²
Coordinates
40.825, -73.125

Weather Forecast

Thursday

71°F
60°F

Friday

70°F
59°F

Saturday

70°F
60°F

Sunday

71°F
60°F

Monday

69°F
54°F

Tuesday

67°F
51°F

Wednesday

58°F
50°F

Thursday

54°F
49°F

Friday

55°F
46°F
Thursday - 5/15/2025
71°F
60°F
12am
61°F
65°F
29.98 hPa
3 mph
SE
G: 9 mph
2am
61°F
65°F
29.95 hPa
1 mph
S
G: 6 mph
4am
61°F
65°F
29.93 hPa
1 mph
E
G: 3 mph
6am
62°F
65°F
29.93 hPa
1 mph
ESE
G: 4 mph
8am
62°F
65°F
29.93 hPa
1 mph
NNE
G: 2 mph
10am
65°F
65°F
29.92 hPa
1 mph
E
G: 3 mph
12pm
66°F
65°F
29.90 hPa
2 mph
S
G: 5 mph
2pm
69°F
65°F
29.89 hPa
5 mph
ESE
G: 7 mph
4pm
70°F
65°F
29.84 hPa
4 mph
SSE
G: 6 mph
6pm
69°F
65°F
29.84 hPa
3 mph
S
G: 6 mph
8pm
63°F
65°F
29.82 hPa
5 mph
S
G: 9 mph
10pm
62°F
65°F
29.83 hPa
4 mph
SSW
G: 7 mph

Water Temperature History

Trends for Lake Ronkonkoma

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

32°F

On Jan 5

Coldest point in the Last 12 Months.

Average in Period

57°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 (80°F).
  • Coolest avg: December (36°F).
  • Rapid warming often occurs: April → May (+13°F).
  • Sharpest cooling trend: November → December (-15°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

Wind Direction

138°

Pressure

1015 mb

Cloud Cover

98%

Visibility

6 miles

Daily Pressure Forecast

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Frequently Asked Questions About Lake Ronkonkoma

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