Diablo Lake

Diablo Lake

Newhalem, Whatcom County, WA
1mi²
380.00ft
Directions
Lake Information

Diablo Lake is a reservoir in the North Cascade mountains of northern Washington state, United States. Created by Diablo Dam, the lake is located between Ross Lake and Gorge Lake on the Skagit River at an elevation of 1,201 feet above sea level.

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Current Conditions

50°F°
Feels like 44°F°
Cloudy
Today's High
44°F°
Today's Low
38°F°

Water Temperature

50°F
Updated: (May 13)
Sign in to contribute temps.

Current water temperature for Diablo Lake is 50°F.

Current Snapshot

Wind7 mph WSW (Gust 16 mph)
Pressure
29.97 inHg
Visibility12 mi
Humidity70%
Cloud Cover98%

Forecast: Wednesday, May 14

Day 1 of 9

Hourly Insights

7 AM
39°F°
13%
10 AM
41°F°
11%
1 PM
44°F°
11%
4 PM
44°F°
12%

Temperature

High
44°F°
Low
38°F°

Precipitation

Chance33%
Amount0.05"
Typerain

Wind

5mph
Avg Speed
Gusts up to
16mph
CalmModerateStrong
Max Speed8 mph

Sun, Moon & UV

Sunrise12:24 PM
Sunset3:38 AM
Moon PhasewaningGibbous
Max UV Index4 (Moderate)

Solunar Fishing Forecast

Action Rating
4/5

Todays action is rated a 4 (scale is 0 thru 5, 5 is the best)

Major Times (Best)

8:45 AM - 11:15 AM

4:53 PM - 7:23 PM

Minor Times (Good)

7:00 AM - 7:00 AM

12:27 PM - 1:57 PM

Outlook for Wednesday at Diablo Lake

Expect temperatures ranging from 38°F to 44°F. There's a 33% chance of rain, potentially bringing around 0.05" rain. Winds will be averaging 5 mph, with potential gusts reaching up to 16 mph. The maximum UV index will be 4 (Moderate), so plan sun protection accordingly. For anglers, today's fishing action is rated 4/5 (Todays action is rated a 4 (scale is 0 thru 5, 5 is the best)). Look for the best bite times during the major periods around 8:45 AM and 4:53 PM, or try the minor windows near 7:00 AM and 12:27 PM for potential early morning or evening action. Check back for the latest conditions and forecasts for Diablo Lake.

Lake Map Views

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May 12th 2025

Lake Information

Elevation
380 ft
Area
1 mi²
Coordinates
48.719, -121.124

Weather Forecast

Wednesday

44°F
38°F

Thursday

46°F
36°F

Friday

47°F
36°F

Saturday

49°F
38°F

Sunday

45°F
37°F

Monday

46°F
36°F

Tuesday

43°F
34°F

Wednesday

48°F
34°F

Thursday

48°F
36°F
Wednesday - 5/14/2025
44°F
38°F
12am
41°F
50°F
30.00 hPa
3 mph
WSW
G: 6 mph
2am
40°F
50°F
29.99 hPa
4 mph
SW
G: 12 mph
4am
40°F
50°F
30.00 hPa
6 mph
WSW
G: 15 mph
6am
39°F
50°F
30.01 hPa
4 mph
WSW
G: 14 mph
8am
39°F
50°F
30.02 hPa
4 mph
WSW
G: 12 mph
10am
41°F
50°F
30.03 hPa
5 mph
WSW
G: 11 mph
12pm
43°F
50°F
30.05 hPa
7 mph
WSW
G: 14 mph
2pm
44°F
50°F
30.05 hPa
7 mph
WSW
G: 14 mph
4pm
44°F
50°F
30.07 hPa
7 mph
WSW
G: 15 mph
6pm
44°F
50°F
30.06 hPa
7 mph
WSW
G: 16 mph
8pm
42°F
50°F
30.07 hPa
5 mph
WSW
G: 12 mph
10pm
40°F
50°F
30.09 hPa
4 mph
W
G: 10 mph

Water Temperature History

Trends for Diablo Lake

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

36°F

On Dec 16

Coldest point in the Last 12 Months.

Average in Period

44°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 (61°F).
  • Coolest avg: December (38°F).
  • Rapid warming often occurs: June → July (+10°F).
  • Sharpest cooling trend: October → November (-7°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

Wind Direction

237°

Pressure

1016 mb

Cloud Cover

69%

Visibility

8 miles

Daily Pressure Forecast

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Frequently Asked Questions About Diablo Lake

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