Potholes Reservoir

Potholes Reservoir

Othello, Grant County, WA
1mi²
308.00ft
Directions
Lake Information

Potholes State Park is a popular recreational area located in Grant County, Washington. The park spans across 773 acres and features 6,000 feet of freshwater shoreline on O'Sullivan Reservoir, which is a prime destination for fishing, boating, and swimming. The reservoir is fed by water from the Columbia River and is often confused with the nearby Pothole Lakes, which are a series of smaller lakes located 30 to 45 minutes away from the park. The terrain of the park is mostly desert with freshwater marshes, providing visitors with a unique and picturesque landscape to explore. The freshwater marshes located within the park are home to a variety of flora and fauna, including cattails, bulrushes, and various species of waterfowl. Visitors can explore the marshes via the park's extensive network of hiking trails, which offer stunning views of the surrounding desert landscape and the nearby reservoir. The trails are suitable for hikers of all skill levels and are a popular destination for birdwatching and wildlife photography. O'Sullivan Reservoir, located within Potholes State Park, is a popular destination for anglers from across the region. The reservoir is home to a variety of fish species, including largemouth bass, smallmouth bass, rainbow trout, walleye, and catfish. The park features a boat launch and a fishing dock, making it easy for visitors to access the reservoir and enjoy a day out on the water. The park also offers a variety of rental options, including kayaks, canoes, and paddleboards. In addition to its natural beauty and recreational opportunities, Potholes State Park also offers a range of amenities for visitors. The park features a large campground with over 60 campsites, including both tent and RV sites. The campground is equipped with restrooms, showers, and picnic areas, making it a popular destination for families and groups looking to enjoy an outdoor getaway. The park also features a playground, a horseshoe pit, and a volleyball court, providing additional recreational opportunities for visitors of all ages. Overall, Potholes State Park is a must-visit destination for anyone looking to explore the natural beauty of Grant County, Washington. With its stunning desert landscape, freshwater marshes, and pristine reservoir, the park offers a unique and unforgettable outdoor experience for visitors of all ages and interests. Whether you're looking to fish, hike, or simply relax and soak up the scenery, Potholes State Park has something to offer everyone.

Read more

Current Conditions

76°F°
Feels like 79°F°
Clear
Today's High
82°F°
Today's Low
49°F°

Water Temperature

52°F
Updated: (May 1)
Sign in to contribute temps.

Current water temperature for Potholes Reservoir is 52°F.

Current Snapshot

Wind6 mph ESE (Gust 9 mph)
Pressure
29.94 inHg
Visibility33 mi
Humidity24%
Cloud Cover1%

Forecast: Friday, May 2

Day 1 of 9

Hourly Insights

7 AM
52°F°
10 AM
65°F°
1 PM
77°F°
4 PM
81°F°

Temperature

High
82°F°
Low
49°F°

Precipitation

Chance0%
Amount0.00"
Typeclear

Wind

5mph
Avg Speed
Gusts up to
19mph
CalmModerateStrong
Max Speed12 mph

Sun, Moon & UV

Sunrise12:39 PM
Sunset3:09 AM
Moon PhasewaxingCrescent
Max UV Index8 (Very High)

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)

1:30 AM - 4:00 AM

7:56 AM - 10:26 AM

Minor Times (Good)

4:01 PM - 5:31 PM

8:06 AM - 9:36 AM

Outlook for Friday at Potholes Reservoir

Expect temperatures ranging from 49°F to 82°F. Skies look mostly clear with little chance of precipitation. Winds will be averaging 5 mph, with potential gusts reaching up to 19 mph. The maximum UV index will be 8 (Very High), 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 1:30 AM and 7:56 AM, or try the minor windows near 4:01 PM and 8:06 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for Potholes Reservoir.

Lake Map Views

LakeMonster PRO

Try Premium Features

Find the fishing sweet spots! See detailed temperature readings throughout your lake.

No credit card required for preview

May 2nd 2025

Lake Information

Elevation
308 ft
Area
1 mi²
Coordinates
46.968, -119.322

Weather Forecast

Friday

82°F
49°F

Saturday

66°F
49°F

Sunday

67°F
43°F

Monday

72°F
47°F

Tuesday

76°F
48°F

Wednesday

81°F
52°F

Thursday

70°F
54°F

Friday

80°F
47°F

Saturday

82°F
54°F
Friday - 5/2/2025
82°F
49°F
12am
57°F
52°F
29.90 hPa
5 mph
NW
G: 7 mph
2am
54°F
52°F
29.90 hPa
5 mph
NW
G: 7 mph
4am
51°F
52°F
29.89 hPa
4 mph
NNW
G: 5 mph
6am
49°F
52°F
29.90 hPa
5 mph
NNW
G: 7 mph
8am
56°F
52°F
29.90 hPa
4 mph
N
G: 6 mph
10am
65°F
52°F
29.88 hPa
2 mph
NNW
G: 6 mph
12pm
74°F
52°F
29.84 hPa
2 mph
N
G: 6 mph
2pm
79°F
52°F
29.79 hPa
2 mph
SSE
G: 8 mph
4pm
81°F
52°F
29.74 hPa
4 mph
S
G: 10 mph
6pm
81°F
52°F
29.71 hPa
5 mph
SSW
G: 9 mph
8pm
74°F
52°F
29.70 hPa
4 mph
SSW
G: 5 mph
10pm
68°F
52°F
29.73 hPa
12 mph
W
G: 19 mph

Water Temperature History

Trends for Potholes Reservoir

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

32°F

On Jan 3

Coldest point in the Last 12 Months.

Average in Period

50°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: July (80°F).
  • Coolest avg: January (34°F).
  • Rapid warming often occurs: March → April (+15°F).
  • Sharpest cooling trend: September → October (-16°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

Wind Direction

315°

Pressure

1013 mb

Cloud Cover

0%

Visibility

20 miles

Daily Pressure Forecast

Go Premium
Better lake days, better fishing, better you with LakeMonster Pro
Relaxing app background
LakeMonster App Icon
Get a 7 day free trial

Frequently Asked Questions About Potholes Reservoir

Get accurate, up-to-date information about conditions at Potholes Reservoir.