Boulder Reservoir

Boulder Reservoir

Boulder, Boulder County, CO
1mi²
ft
Directions
Lake Information

Boulder Reservoir is a man-made lake located in Boulder County, Colorado. With a surface area of 586 acres, the reservoir is a popular destination for outdoor enthusiasts looking to engage in water-based activities such as swimming, fishing, and boating. The lake is also surrounded by beautiful natural landscapes, including the Rocky Mountains, which provide visitors with plenty of opportunities to explore the great outdoors. The reservoir was created in 1955 when the Boulder Dam and Reservoir Company constructed a dam on the Boulder Creek. The primary purpose of the dam was to provide a reliable water source for the surrounding area, including the city of Boulder. Today, the reservoir also serves as a popular recreational area, attracting visitors from all over the region. Fishing is a popular activity at Boulder Reservoir, with anglers seeking out species such as channel catfish, largemouth bass, bluegill, and rainbow trout. The reservoir is stocked regularly with fish, and fishing licenses can be purchased on-site or online. Boating is another popular activity at the reservoir, with visitors able to launch boats from the on-site boat ramp. However, due to safety concerns, motorized boats are only allowed on the reservoir during specific hours. Boulder Reservoir is also home to a swimming beach that is open during the summer months. The beach is staffed with lifeguards, and there are facilities on-site for changing and showering. In addition to swimming, visitors can also engage in other water-based activities such as kayaking, stand-up paddleboarding, and windsurfing. The surrounding area of the reservoir is home to several hiking and biking trails, providing visitors with plenty of opportunities to explore the beautiful natural landscapes of Colorado. There are also several picnic areas located around the reservoir, making it an ideal spot for a day out with family or friends. Overall, Boulder Reservoir is a great destination for anyone looking to enjoy the beauty of the Colorado outdoors while engaging in a variety of recreational activities.

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Current Conditions

56°F°
Feels like 54°F°
Cloudy
Today's High
60°F°
Today's Low
41°F°

Water Temperature

60°F
Updated: (Apr 30)
Sign in to contribute temps.

Current water temperature for Boulder Reservoir is 60°F.

Current Snapshot

Wind4 mph ENE (Gust 7 mph)
Pressure
29.77 inHg
Visibility16 mi
Humidity57%
Cloud Cover91%

Forecast: Thursday, May 1

Day 1 of 9

Hourly Insights

7 AM
42°F°
10 AM
51°F°
1 PM
56°F°
8%
4 PM
57°F°
10%

Temperature

High
60°F°
Low
41°F°

Precipitation

Chance38%
Amount0.16"
Typerain

Wind

5mph
Avg Speed
Gusts up to
18mph
CalmModerateStrong
Max Speed13 mph

Sun, Moon & UV

Sunrise12:00 PM
Sunset1:56 AM
Moon PhasewaxingCrescent
Max UV Index6 (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)

10:32 PM - 1:02 AM

7:53 AM - 10:23 AM

Minor Times (Good)

2:24 PM - 3:54 PM

6:00 AM - 6:00 AM

Outlook for Thursday at Boulder Reservoir

Expect temperatures ranging from 41°F to 60°F. There's a 38% chance of rain, potentially bringing around 0.16" rain. Winds will be averaging 5 mph, with potential gusts reaching up to 18 mph. The maximum UV index will be 6 (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 10:32 PM and 7:53 AM, or try the minor windows near 2:24 PM and 6:00 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for Boulder Reservoir.

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April 30th 2025

Lake Information

Elevation
N/A
Area
1 mi²
Coordinates
40.072, -105.221

Weather Forecast

Thursday

60°F
41°F

Friday

61°F
37°F

Saturday

70°F
39°F

Sunday

71°F
44°F

Monday

61°F
44°F

Tuesday

46°F
39°F

Wednesday

54°F
38°F

Thursday

61°F
41°F

Friday

70°F
42°F
Thursday - 5/1/2025
60°F
41°F
12am
45°F
60°F
30.02 hPa
2 mph
W
G: 4 mph
2am
44°F
60°F
30.04 hPa
1 mph
SSE
G: 4 mph
4am
43°F
60°F
30.05 hPa
2 mph
NE
G: 4 mph
6am
41°F
60°F
30.05 hPa
2 mph
SSW
G: 4 mph
8am
44°F
60°F
30.07 hPa
1 mph
E
G: 2 mph
10am
51°F
60°F
30.02 hPa
6 mph
ESE
G: 8 mph
12pm
55°F
60°F
29.98 hPa
7 mph
E
G: 9 mph
2pm
58°F
60°F
29.93 hPa
6 mph
ESE
G: 10 mph
4pm
57°F
60°F
29.90 hPa
13 mph
ENE
G: 18 mph
6pm
55°F
60°F
29.92 hPa
6 mph
NE
G: 13 mph
8pm
49°F
60°F
30.03 hPa
8 mph
NNE
G: 16 mph
10pm
44°F
60°F
30.14 hPa
5 mph
NNE
G: 13 mph

Water Temperature History

Trends for Boulder Reservoir

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

33°F

On Jan 12

Coldest point in the Last 12 Months.

Average in Period

53°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: February (33°F).
  • Rapid warming often occurs: March → April (+18°F).
  • Sharpest cooling trend: September → October (-18°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm05101520

Wind Direction

261°

Pressure

1017 mb

Cloud Cover

99%

Visibility

8 miles

Daily Pressure Forecast

ThuFriSatSunMonTueWedThuFri0.008.8617.7226.5835.44
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Frequently Asked Questions About Boulder Reservoir

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