Water Temperature of the Cascade River in Marblemount, WA

Current Water Temperature

58.3°F

Measurement Time: Wednesday, August 5, 2026, 12:45 PM PDT

Temperature Locations

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Local Points of Interest

Skagit River

Cascade River

Station Name: CASCADE RIVER AT MARBLEMOUNT, WA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 348 feet

Nearest Address:
5901 S Cascade Rd
Marblemount, WA 98267
Skagit County

GPS Coordinates: 48.5262307, -121.4154046

Nearby Water Temperatures

Skagit River, Marblemount, WA (0.8 mi)
Bacon Creek, Marblemount, WA (5.5 mi)
Sauk River, Concrete, WA (9.9 mi)
Skagit River, Newhalem, WA (12.7 mi)
Sauk River, Darrington, WA (20.6 mi)
Big Beaver Creek, Diablo, WA (23.4 mi)
Ruby Creek, Newhalem, WA (23.6 mi)
Sauk River, Darrington, WA (24.8 mi)
North Fork Nooksack River, Glacier, WA (32.7 mi)
Skookum Creek, Doran, WA (34.6 mi)
South Fork Nooksack River, Doran, WA (35.9 mi)
South Fork Sultan River, Sultan, WA (41.2 mi)
Skagit River, Burlington, WA (42.5 mi)
Sultan River, Lake Roesiger, WA (42.9 mi)
Nooksack River, Cedarville, WA (45.6 mi)

Weather for Marblemount, Washington

Current Weather

61.5°F
Sunny
Sunny
59.2°F
61.5°F
58%
WSW 2.7 mph
5.6 mph
61.5°F
46.6°F
0 in
0%
6 mi
1013 mbar
0

Five Day Weather Forecast

Smoky haze
Wed
H: 71°F
L: 55°F
Sunny
Thu
H: 80°F
L: 56°F
Sunny
Fri
H: 77°F
L: 56°F
Sunny
Sat
H: 73°F
L: 53°F
Sunny
Sun
H: 74°F
L: 50°F

Air Quality

AQI: 1 - Good
PM2.5: 33.4 μg/m3
PM10: 35 μg/m3
Carbon Monoxide: 241 μg/m3
Nitrogen Dioxide: 2.8 μg/m3
Sulphur Dioxide: 2 μg/m3
Ozone: 117 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:11 PM
Sunset: 8:37 PM
Daylight: 14 hrs 51 mins
Moonrise: 11:09 PM
Moon Transit: 6:17 AM
Moonset: 2:09 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:47 AM - 8:17 AM
1:53 PM - 4:23 PM

Minor Periods

12:00 AM - 12:00 AM
1:39 PM - 3:09 PM

Action Rating: 3 out of 5

Air Quality Alert issued August 4 at 11:01AM PDT by NWS Seattle WA

Effective: Tue August 4, 2026, 11:01 AM
Expires: Wed August 5, 2026, 5:00 PM

An Air Quality Alert for wildfire smoke has been issued by the following agencies: Northwest Clean Air Agency An Air Quality Alert has been issued for Whatcom and Skagit Counties through Thursday August 6 at 5pm due to current and expected wildfire smoke from regional fires. Degraded air quality is expected in Skagit County from Hamilton eastward and in Whatcom from Deming eastward. Particulate matter (PM2.5) concentrations may reach Unhealthy levels in the easter portions of Skagit and Whatcom Counties. When air quality is Unhealthy, everyone should reduce exposure. Limit time outside, avoid strenuous outdoor activity, and follow tips for cleaner indoor air.


Air Quality Alert issued August 5 at 3:47PM PDT by NWS Seattle WA

Effective: Wed August 5, 2026, 3:47 PM
Expires: Thu August 6, 2026, 5:00 PM

An Air Quality Alert for wildfire smoke has been issued by the following agencies: Northwest Clean Air Agency An Air Quality Alert has been issued for Whatcom and Skagit Counties through Thursday August 6 at 5pm due to current and expected wildfire smoke from regional fires. Degraded air quality is expected in Skagit County from Hamilton eastward and in Whatcom from Deming eastward. Particulate matter (PM2.5) concentrations may reach Unhealthy levels in the easter portions of Skagit and Whatcom Counties. When air quality is Unhealthy, everyone should reduce exposure. Limit time outside, avoid strenuous outdoor activity, and follow tips for cleaner indoor air.
Wednesday, August 5, 2026

Weather Forecast

Smoky haze
71.1°F
55.4°F
62.2°F
43%
0 in
1%
0%
5.6 mph
7.3


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 57.68 μg/m3
PM10: 59.12 μg/m3
Carbon Monoxide: 379.5 μg/m3
Nitrogen Dioxide: 5.67 μg/m3
Sulphur Dioxide: 2.63 μg/m3
Ozone: 113.21 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:11 PM
Sunset: 8:37 PM
Daylight: 14 hrs 51 mins
Moonrise: 11:09 PM
Moon Transit: 6:17 AM
Moonset: 2:09 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:47 AM - 8:17 AM
1:53 PM - 4:23 PM

Minor Periods

12:00 AM - 12:00 AM
1:39 PM - 3:09 PM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
80.2°F
56.3°F
66.7°F
32%
0 in
1%
0%
5.4 mph
8.2


Air Quality

AQI: 2 - Moderate
PM2.5: 27.88 μg/m3
PM10: 29.14 μg/m3
Carbon Monoxide: 178.58 μg/m3
Nitrogen Dioxide: 4.35 μg/m3
Sulphur Dioxide: 1.63 μg/m3
Ozone: 108.42 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:11 PM
Sunset: 8:35 PM
Daylight: 14 hrs 48 mins
Moonrise: 12:09 AM
Moon Transit: 7:11 AM
Moonset: 3:32 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:41 AM - 9:11 AM
2:49 PM - 5:19 PM

Minor Periods

3:02 PM - 4:32 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, August 7, 2026

Weather Forecast

Sunny
77.1°F
55.7°F
65.3°F
49%
0 in
2%
0%
6.5 mph
7.9


Air Quality

AQI: 2 - Moderate
PM2.5: 22.19 μg/m3
PM10: 22.93 μg/m3
Carbon Monoxide: 124 μg/m3
Nitrogen Dioxide: 3.96 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 116.17 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:11 PM
Sunset: 8:34 PM
Daylight: 14 hrs 45 mins
Moonrise: 12:41 AM
Moon Transit: 8:10 AM
Moonset: 4:53 PM
Moon Phase: Last Quarter
Moon Illumination: 22.2%

Best Times for Fishing or Hunting

Major Periods

7:40 AM - 10:10 AM
3:49 PM - 6:19 PM

Minor Periods

4:23 PM - 5:53 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Saturday, August 8, 2026

Weather Forecast

Sunny
72.6°F
52.7°F
61.1°F
57%
0 in
5%
0%
6 mph
7.2


Air Quality

AQI: 2 - Moderate
PM2.5: 15.93 μg/m3
PM10: 16.7 μg/m3
Carbon Monoxide: 111.71 μg/m3
Nitrogen Dioxide: 4.08 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 98.13 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:11 PM
Sunset: 8:32 PM
Daylight: 14 hrs 42 mins
Moonrise: 12:27 AM
Moon Transit: 9:13 AM
Moonset: 6:04 PM
Moon Phase: Waning Crescent
Moon Illumination: 13.6%

Best Times for Fishing or Hunting

Major Periods

8:43 AM - 11:13 AM
4:53 PM - 7:23 PM

Minor Periods

5:34 PM - 7:04 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, August 9, 2026

Weather Forecast

Sunny
73.5°F
50.2°F
60.9°F
57%
0 in
3%
0%
5.8 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 8.87 μg/m3
PM10: 9.61 μg/m3
Carbon Monoxide: 93.4 μg/m3
Nitrogen Dioxide: 4.63 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 77.21 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 1:11 PM
Sunset: 8:30 PM
Daylight: 14 hrs 39 mins
Moonrise: 1:29 AM
Moon Transit: 10:19 AM
Moonset: 7:01 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.8%

Best Times for Fishing or Hunting

Major Periods

5:58 PM - 8:28 PM
9:49 AM - 12:19 AM

Minor Periods

6:31 PM - 8:01 PM
12:59 AM - 2:29 AM

Action Rating: 4 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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