Tongue River Reservoir

Tongue River Reservoir

Decker, MT

68°F
44°
14 mph62°/24°

Right Now

44°

Cloudy

Water

68°

Wind

14 mph

NNW

Gusts

18 mph

Pressure

30.20

rising

Forecast - Tue, May 19

7am
29°
10am
45°
1pm
56°
4pm
61°

High / Low

62° / 24°

Wind

3 mph

gusts 12 mph

Precip

0%

UV

7

Sunrise

11:33 AM

Sunset

2:34 AM

Today Read

Tongue River Reservoir

Wind read

Calm

3 mph avg

Water read

68°

Warm-water bite

Air range

24° / 62°

today

Precip

0%

low concern

Today's forecast for Tongue River Reservoir has calm wind, 24F to 62F air temperatures, 0% chance of precipitation, and 68F water.

AI lake plannerShort window onlyChecking questions

Ask what to do at Tongue River Reservoir 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

Active-water pattern for Northern pike / Walleye

48 confidence

Active temps make wind edges, shallow cover, and feeding windows more important. Wind matters today; use it only where control stays safe. With a weak solunar score, favor stable weather windows.

Uses this lake data

Current water temp: 68°FWater temp history: 470 readingsHourly weather: 224 hoursSolunar timing: 2/5Fish species: 10 listedSatellite imagery: 320 captures

Trip read from the AI planner

Fishing Forecast

waxing crescent

2/5

Major

9:43 PM - 12:13 AM

Minor

1:17 PM - 2:47 PM

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May 14, 2026

Fish Species

10

Water Temperature History

Current

71°

May 31

Low

34°

Jan 1

Average

56°

Last 12 Months

Warmest avg: July (78°F)

Coolest avg: December (35°F)

Rapid warming: AprilMay (+12°F)

Sharpest cooling: SeptemberOctober (-18°F)

Weather Forecast

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

Hourly Wind Forecast

19

12am - 11pm

Wind SpeedWind Gust
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Peak Wind

5 mph

5pm

Peak Gust

12 mph

highest gust

Pressure

30.28 inHg

rising

Visibility

16 mi

7% 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 Tongue River Reservoir

Tongue River Reservoir covers 2158.00 acres (3.37 square miles)

Tongue River Reservoir is located in Decker, Big Horn County, MT. It is accessible to the public for outdoor activities.