Water Temperature of the Arkansas River in Portland, CO

Current Water Temperature

32.0°F

Measurement Time: Friday, July 31, 2026, 3:32 AM MDT

Temperature Locations

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Local Points of Interest

Florence, CO; Penrose, CO

Arkansas River

Station Name: ARKANSAS RIVER AT PORTLAND, CO.
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 5,043 feet

Nearest Address:
State Hwy 120
Portland, CO 81226
Fremont County

GPS Coordinates: 38.38833418, -105.0160961

Nearby Water Temperatures

Arkansas River, Cañon City, CO (13.4 mi)
Fountain Creek, Pueblo, CO (23.5 mi)
Fountain Creek, Fountain, CO (23.8 mi)
Arkansas River, Pueblo, CO (24.1 mi)
Arkansas River, Pueblo, CO (24.3 mi)
Arkansas River, Avondale, CO (34.8 mi)
Arkansas River, Manzanola, CO (62.6 mi)
South Platte River, Roxborough Park, CO (71.4 mi)
Arkansas River, Rocky Ford, CO (75.6 mi)
Arkansas River, Granite, CO (81.1 mi)
South Platte River, Englewood, CO (88.2 mi)
Halfmoon Creek, Twin Lakes, CO (91.7 mi)
Purgatoire River, Trinchera, CO (93.7 mi)
Purgatoire River, Kim, CO (94 mi)
South Platte River, Denver, CO (98.4 mi)

Weather for Portland, Colorado

Current Weather

77.5°F
Sunny
Sunny
77.2°F
78.3°F
43%
SE 2.9 mph
3.4 mph
77.5°F
53.5°F
0 in
7%
6 mi
1020 mbar
3.2

Five Day Weather Forecast

Sunny
Fri
H: 87°F
L: 62°F
Sunny
Sat
H: 91°F
L: 59°F
Sunny
Sun
H: 98°F
L: 62°F
Sunny
Mon
H: 102°F
L: 66°F
Sunny
Tue
H: 86°F
L: 61°F

Air Quality

AQI: 1 - Good
PM2.5: 4 μg/m3
PM10: 5.6 μg/m3
Carbon Monoxide: 112 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 99 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:06 PM
Sunset: 8:11 PM
Daylight: 14 hrs 10 mins
Moonrise: 9:24 PM
Moon Transit: 2:25 AM
Moonset: 7:58 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:55 AM - 4:25 AM
12:13 AM - 2:43 PM

Minor Periods

8:54 PM - 10:24 PM
7:28 AM - 8:58 AM

Action Rating: 3 out of 5

Flash Flood Watch issued July 30 at 7:54PM MDT until July 31 at 9:00PM MDT by NWS Pueblo CO

Effective: Thu July 30, 2026, 7:54 PM
Expires: Fri July 31, 2026, 4:00 AM

* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the Aspen Acres Burn Scar. * WHERE...The Aspen Acres Burn Scar. * WHEN...From Friday afternoon through Friday evening. * IMPACTS...Heavy rainfall over the Aspen Acres Burn Scar is expected up to and during the period of the watch. debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting the potential for heavy rainfall over the burn scar on Friday, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Beulah, San Isabel, and highways 165 and 78 in and around Aspen Acres Burn Scar. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.


Flash Flood Watch issued July 30 at 11:07PM MDT until July 31 at 11:00PM MDT by NWS Pueblo CO

Effective: Thu July 30, 2026, 11:07 PM
Expires: Fri July 31, 2026, 7:15 AM

* WHAT...Flash flooding and debris flows caused by excessive rainfall continue to be possible over the Aspen Acres Burn Scar. * WHERE...The Aspen Acres Burn Scar. * WHEN...From Friday afternoon through Friday evening. * IMPACTS...Heavy rainfall over the Aspen Acres Burn Scar is expected up to and during the period of the watch. debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting the potential for heavy rainfall over the burn scar on Friday, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Beulah, San Isabel, and highways 165 and 78 in and around Aspen Acres Burn Scar. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Friday, July 31, 2026

Weather Forecast

Sunny
87.1°F
62.3°F
73.1°F
50%
0.09 in
57%
0%
17 mph
11.2


Air Quality

AQI: 1 - Good
PM2.5: 5.51 μg/m3
PM10: 6.82 μg/m3
Carbon Monoxide: 112.08 μg/m3
Nitrogen Dioxide: 5.06 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 91.5 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:06 PM
Sunset: 8:11 PM
Daylight: 14 hrs 10 mins
Moonrise: 9:24 PM
Moon Transit: 2:25 AM
Moonset: 7:58 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:55 AM - 4:25 AM
12:13 AM - 2:43 PM

Minor Periods

8:54 PM - 10:24 PM
7:28 AM - 8:58 AM

Action Rating: 3 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
90.9°F
59.4°F
74.7°F
42%
0 in
17%
0%
15.4 mph
10.8


Air Quality

AQI: 1 - Good
PM2.5: 7.37 μg/m3
PM10: 8.93 μg/m3
Carbon Monoxide: 120.17 μg/m3
Nitrogen Dioxide: 5.06 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 95.75 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:06 PM
Sunset: 8:10 PM
Daylight: 14 hrs 8 mins
Moonrise: 9:47 PM
Moon Transit: 3:08 AM
Moonset: 9:02 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:38 AM - 5:08 AM
12:55 AM - 3:25 PM

Minor Periods

9:17 PM - 10:47 PM
8:32 AM - 10:02 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
98.3°F
62.2°F
79.4°F
30%
0 in
1%
0%
17.4 mph
10.4


Air Quality

AQI: 1 - Good
PM2.5: 5.7 μg/m3
PM10: 7.07 μg/m3
Carbon Monoxide: 123.96 μg/m3
Nitrogen Dioxide: 4.92 μg/m3
Sulphur Dioxide: 0.82 μg/m3
Ozone: 99.71 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:06 PM
Sunset: 8:09 PM
Daylight: 14 hrs 6 mins
Moonrise: 10:10 PM
Moon Transit: 3:51 AM
Moonset: 10:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:21 AM - 5:51 AM
4:20 PM - 6:50 PM

Minor Periods

9:40 PM - 11:10 PM
9:35 AM - 11:05 AM

Action Rating: 3 out of 5

Monday, August 3, 2026

Weather Forecast

Sunny
101.6°F
65.9°F
82.5°F
22%
0.01 in
17%
0%
11 mph
11


Air Quality

AQI: 1 - Good
PM2.5: 4.38 μg/m3
PM10: 5.8 μg/m3
Carbon Monoxide: 120.65 μg/m3
Nitrogen Dioxide: 4.77 μg/m3
Sulphur Dioxide: 0.63 μg/m3
Ozone: 95.42 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:06 PM
Sunset: 8:08 PM
Daylight: 14 hrs 4 mins
Moonrise: 10:35 PM
Moon Transit: 12:00 AM
Moonset: 11:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

10:05 PM - 11:35 PM
10:40 AM - 12:10 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Sunny
85.5°F
61.3°F
73.3°F
37%
0.07 in
57%
0%
17.9 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 5.14 μg/m3
PM10: 5.9 μg/m3
Carbon Monoxide: 168.86 μg/m3
Nitrogen Dioxide: 12.07 μg/m3
Sulphur Dioxide: 0.64 μg/m3
Ozone: 49.57 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:06 PM
Sunset: 8:07 PM
Daylight: 14 hrs 2 mins
Moonrise: 11:02 PM
Moon Transit: 5:20 AM
Moonset: 12:18 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:50 AM - 7:20 AM
3:10 PM - 5:40 PM

Minor Periods

12:00 AM - 12:00 AM
11:48 AM - 1:18 PM

Action Rating: 2 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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