Water Temperature of the Boiling River Hot Springs in Yellowstone National Park, WY

Current Water Temperature

128.8°F

Measurement Time: Sunday, July 26, 2026, 10:15 AM MDT

Temperature Locations

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Local Points of Interest

Gardner River; Mammoth Hot Springs; Cody, WY

Boiling River Hot Springs

Station Name: Boiling River at Mammoth,YNP
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 5,686 feet

Nearest Address:
N Entrance Rd
Yellowstone National Park, WY 82190
Park County

GPS Coordinates: 44.9851333, -110.6893444

Nearby Water Temperatures

Yellowstone River, Corwin Springs, MT (10.1 mi)
Lamar River, Yellowstone National Park, WY (15 mi)
Tantalus Creek, Yellowstone National Park, WY (17.5 mi)
Gibbon River, Yellowstone National Park, WY (25.2 mi)
Firehole River, Yellowstone National Park, WY (26.6 mi)
Madison River, West Yellowstone, MT (29.3 mi)
Madison River, Grayling, MT (32.8 mi)
Firehole River, Yellowstone National Park, WY (36.9 mi)
Madison River, Cameron, MT (44.1 mi)
West Rosebud Creek, Roscoe, MT (51.7 mi)
Madison River, Ennis, MT (54.6 mi)
Madison River, Norris, MT (57.7 mi)
Snake River, Flagg Ranch, WY (61.2 mi)
Jefferson River, Three Forks, MT (76.8 mi)
Snake River, Moran, WY (78 mi)

Weather for Yellowstone National Park, Wyoming

Current Weather

86.8°F
Partly Cloudy
Partly Cloudy
72.9°F
83.5°F
23%
WSW 12.1 mph
13.9 mph
86.8°F
45.1°F
0 in
28%
6 mi
1010 mbar
4.2

Five Day Weather Forecast

Sunny
Sun
H: 88°F
L: 48°F
Partly Cloudy
Mon
H: 88°F
L: 50°F
Sunny
Tue
H: 90°F
L: 47°F
Sunny
Wed
H: 90°F
L: 47°F
Sunny
Thu
H: 90°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 3.6 μg/m3
PM10: 5.9 μg/m3
Carbon Monoxide: 97 μg/m3
Nitrogen Dioxide: 0.2 μg/m3
Sulphur Dioxide: 0.3 μg/m3
Ozone: 110 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:29 PM
Sunset: 8:56 PM
Daylight: 14 hrs 55 mins
Moonrise: 7:37 PM
Moon Transit: 11:38 PM
Moonset: 2:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

7:51 AM - 10:21 AM
12:00 AM - 12:00 AM

Minor Periods

7:07 PM - 8:37 PM
2:16 AM - 3:46 AM

Action Rating: 3 out of 5

Heat Advisory issued July 26 at 3:21AM MDT until July 26 at 9:00PM MDT by NWS Riverton WY

Effective: Sun July 26, 2026, 3:21 AM
Expires: Sun July 26, 2026, 9:00 PM

* WHAT...Very hot conditions with high temperatures from 95 to 102 degrees. * WHERE...Lower elevations of central and north-central Wyoming, east of the Continental Divide. * WHEN...Until 9 PM MDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Some locations will not see temperatures fall below 90 degrees until sunset. Temperatures at midnight will still be 75 to 80 degrees. Overnight low temperatures eventually bottom-out in the mid to upper 60s.

Drink plenty of hydrating fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or late evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Sunday, July 26, 2026

Weather Forecast

Sunny
87.7°F
47.7°F
68.6°F
46%
0 in
2%
0%
12.1 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 4.91 μg/m3
PM10: 10.25 μg/m3
Carbon Monoxide: 96.63 μg/m3
Nitrogen Dioxide: 3.3 μg/m3
Sulphur Dioxide: 0.24 μg/m3
Ozone: 85.88 μg/m3

Astronomical

Sunrise: 6:02 AM
Sun Transit: 1:29 PM
Sunset: 8:56 PM
Daylight: 14 hrs 55 mins
Moonrise: 7:37 PM
Moon Transit: 11:38 PM
Moonset: 2:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

7:51 AM - 10:21 AM
12:00 AM - 12:00 AM

Minor Periods

7:07 PM - 8:37 PM
2:16 AM - 3:46 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Partly Cloudy
88.4°F
49.6°F
69°F
37%
0 in
17%
0%
16.6 mph
8.6


Air Quality

AQI: 1 - Good
PM2.5: 4.52 μg/m3
PM10: 7.07 μg/m3
Carbon Monoxide: 99.5 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 88.79 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:29 PM
Sunset: 8:55 PM
Daylight: 14 hrs 52 mins
Moonrise: 8:16 PM
Moon Transit: 12:00 AM
Moonset: 3:43 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:42 AM - 11:12 AM

Minor Periods

7:46 PM - 9:16 PM
3:13 AM - 4:43 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
90.2°F
46.8°F
68.7°F
30%
0 in
1%
0%
15 mph
9.6


Air Quality

AQI: 1 - Good
PM2.5: 5.45 μg/m3
PM10: 8.67 μg/m3
Carbon Monoxide: 96.63 μg/m3
Nitrogen Dioxide: 3.49 μg/m3
Sulphur Dioxide: 0.34 μg/m3
Ozone: 91.63 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:29 PM
Sunset: 8:54 PM
Daylight: 14 hrs 50 mins
Moonrise: 8:48 PM
Moon Transit: 12:28 AM
Moonset: 4:47 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:32 AM - 12:02 AM

Minor Periods

8:18 PM - 9:48 PM
4:17 AM - 5:47 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
90.2°F
46.8°F
65.9°F
38%
0.02 in
36%
0%
14.8 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 4.68 μg/m3
PM10: 7.05 μg/m3
Carbon Monoxide: 99.99 μg/m3
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 87.71 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:29 PM
Sunset: 8:53 PM
Daylight: 14 hrs 48 mins
Moonrise: 9:13 PM
Moon Transit: 1:17 AM
Moonset: 5:55 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:47 AM - 3:17 AM
10:20 AM - 12:50 AM

Minor Periods

8:43 PM - 10:13 PM
5:25 AM - 6:55 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
90.3°F
44.1°F
67.9°F
46%
0.01 in
17%
0%
13.2 mph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 3.53 μg/m3
PM10: 4.64 μg/m3
Carbon Monoxide: 112.71 μg/m3
Nitrogen Dioxide: 8.1 μg/m3
Sulphur Dioxide: 0.23 μg/m3
Ozone: 61.43 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:29 PM
Sunset: 8:52 PM
Daylight: 14 hrs 46 mins
Moonrise: 9:35 PM
Moon Transit: 2:03 AM
Moonset: 7:03 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:33 AM - 4:03 AM
11:05 AM - 1:35 PM

Minor Periods

9:05 PM - 10:35 PM
6:33 AM - 8:03 AM

Action Rating: 5 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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