What is the average water temperature in Idaho?

The current average water temperature across Idaho's monitored water bodies is 56.1°F.

🌡️

Idaho Water Temperatures

Q: What is the warmest lake in Idaho today?

Boise River Nr Twin Springs Id at 157.8°F.

Current lake & river temperatures in Idaho — updated daily from USGS sensors.

With Data

56.1°F

State Avg

157.8°F

Warmest

157.8°F

Warmest

Boise River Nr Twin Springs Id

56.1°F

State Average

100 water bodies

32°F

Coldest

Henrys Fork Nr Rexburg Id

🏊

Swimming Conditions

🚫 Too cold for most swimmers

Based on avg 56.1°F

🎣

Fishing Conditions

🎣 Good — trout, walleye, bass

Based on avg 56.1°F

Idaho — Ranked by Temperature

88 with data

#	Water Body	°F	°C	Condition	🏊	Date
1	Boise River Nr Twin Springs Id River	157.8°	69.9°	🔥 Hot	🏊 Excellent	Aug 17
2	Efsf Salmon R Abv Meadow Crk Nr Stibnite, Id Lake	98.2°	36.8°	🔥 Hot	🏊 Excellent	May 13
3	Lochsa River Nr Lowell Id River	68°	20°	🌤️ Comfortable	⚠️ Brisk	Jul 21
4	Ef Owyhee River At Crutcher Crossing, Id River	67.8°	19.9°	🌤️ Comfortable	⚠️ Brisk	Jun 5
5	Snake River At King Hill Id River	64.4°	18°	🌊 Cool	🚫 Cold	Jun 5
6	Portneuf River At Topaz Id River	63.7°	17.6°	🌊 Cool	🚫 Cold	Sep 29
7	Bruneau River Nr Hot Spring Id River	63.5°	17.5°	🌊 Cool	🚫 Cold	Oct 13
8	Nf Payette River At Cascade Id River	62.6°	17°	🌊 Cool	🚫 Cold	Sep 29
9	Silver Creek At Sportsman Access Nr Picabo Id River	62.4°	16.9°	🌊 Cool	🚫 Cold	Jun 5
10	Rock Creek Ab Hwy 30/93 Xing At Twin Falls Id River	62.1°	16.7°	🌊 Cool	🚫 Cold	Jun 5
11	Snake River At Nyssa Or River	61.7°	16.5°	🌊 Cool	🚫 Cold	Oct 18
12	Spokane River Near Post Falls, Id River	61.2°	16.2°	🌊 Cool	🚫 Cold	Sep 29
13	Payette River Nr Payette Id River	60.6°	15.9°	🌊 Cool	🚫 Cold	Sep 30
14	Snake River Gaging Station At Milner Id River	60.4°	15.8°	🌊 Cool	🚫 Cold	Sep 29
15	Snake River At Pigeon Cove Nr Twin Falls, Id River	60.4°	15.8°	🌊 Cool	🚫 Cold	Oct 1
16	Clark Fork River Below Cabinet Gorge Dam Id River	60.4°	15.8°	🌊 Cool	🚫 Cold	Sep 29
17	Malad River Nr Gooding Id River	60.3°	15.7°	🌊 Cool	🚫 Cold	Sep 29
18	Salmon River Nr Shoup Id River	60.1°	15.6°	🌊 Cool	🚫 Cold	Jun 5
19	Snake River At Mcduff Rapids At China Garden Id River	59.9°	15.5°	🌊 Cool	🚫 Cold	Jun 4
20	Snake River Nr Kimberly Id River	59.9°	15.5°	🌊 Cool	🚫 Cold	Sep 30
21	Snake River At Neeley Id River	59.9°	15.5°	🌊 Cool	🚫 Cold	Sep 29
22	Weiser River Nr Weiser Id River	59.7°	15.4°	🌊 Cool	🚫 Cold	Sep 30
23	Snake River Nr Buhl Id River	59.5°	15.3°	🌊 Cool	🚫 Cold	Sep 30
24	Snake River Nr Menan Id River	59.4°	15.2°	🌊 Cool	🚫 Cold	Sep 30
25	Boise River At Glenwood Bridge Nr Boise Id River	59.4°	15.2°	🌊 Cool	🚫 Cold	Jul 8
26	Palouse River Nr Potlatch, Id River	59.2°	15.1°	🌊 Cool	🚫 Cold	Sep 29
27	Snake River At Lorenzo Id River	59.2°	15.1°	🌊 Cool	🚫 Cold	Sep 30
28	Bear River At Border, Wy River	59°	15°	🌊 Cool	🚫 Cold	Sep 29
29	Payette River Nr Emmett Id River	59°	15°	🌊 Cool	🚫 Cold	Sep 29
30	Snake R Nr Minidoka Id At Howells Ferry Lake	58.8°	14.9°	🌊 Cool	🚫 Cold	Sep 29
31	Boise River Abv Indian Creek At Caldwell, Id River	58.6°	14.8°	🌊 Cool	🚫 Cold	Jun 5
32	Boise River At Caldwell, Id River	58.6°	14.8°	🌊 Cool	🚫 Cold	Jun 4
33	Salmon Falls Creek Nr Hagerman Id River	58.5°	14.7°	🌊 Cool	🚫 Cold	Sep 30
34	Big Wood River At Stanton Crossing Nr Bellevue Id River	58.5°	14.7°	🌊 Cool	🚫 Cold	Sep 23
35	Salmon River At White Bird Id River	58.5°	14.7°	🌊 Cool	🚫 Cold	Jun 5
36	Nf Payette River Nr Banks Id River	58.1°	14.5°	🌊 Cool	🚫 Cold	Sep 29
37	Snake River At Weiser Id River	58.1°	14.5°	🌊 Cool	🚫 Cold	Jun 4
38	Lapwai Creek Nr Lapwai, Id River	57.9°	14.4°	🌊 Cool	🚫 Cold	Sep 30
39	South Fork Payette River At Lowman, Id River	57.7°	14.3°	🌊 Cool	🚫 Cold	Aug 30
40	St Joe River At Calder, Id River	57°	13.9°	🌊 Cool	🚫 Cold	Sep 29
41	Marsh Creek Nr Mccammon Id River	56.8°	13.8°	🌊 Cool	🚫 Cold	Sep 30
42	Clearwater River At Spalding Id River	56.5°	13.6°	🌊 Cool	🚫 Cold	Jun 5
43	Snake River Nr Blackfoot Id River	56.3°	13.5°	🌊 Cool	🚫 Cold	Oct 13
44	Big Wood River At Hailey Id Total Flow River	56.1°	13.4°	🌊 Cool	🚫 Cold	Sep 23
45	Snake River Nr Shelley Id River	55.9°	13.3°	🌊 Cool	🚫 Cold	Sep 25
46	Big Lost River Bl Mackay Res Nr Mackay Id River	55.9°	13.3°	🌊 Cool	🚫 Cold	Sep 20
47	Clearwater River At Orofino Id River	55.9°	13.3°	🌊 Cool	🚫 Cold	Jun 5
48	Sf Clearwater River At Stites Id River	55.4°	13°	🌊 Cool	🚫 Cold	Sep 29
49	Clearwater River Nr Peck Id River	55°	12.8°	🌊 Cool	🚫 Cold	Jun 5
50	Snake River Nr Heise Id River	54.9°	12.7°	❄️ Cold	⛔ Very cold	Sep 29
51	Blackfoot River Nr Blackfoot Id River	54.9°	12.7°	❄️ Cold	⛔ Very cold	Oct 13
52	Salmon River At Salmon Id River	54.7°	12.6°	❄️ Cold	⛔ Very cold	Sep 29
53	Eagle Drain At Eagle, Id Lake	54.5°	12.5°	❄️ Cold	⛔ Very cold	Oct 25
54	Trail Creek At Ketchum Id River	54.3°	12.4°	❄️ Cold	⛔ Very cold	Sep 23
55	Upper Clear Creek Near Kooskia, Id River	54°	12.2°	❄️ Cold	⛔ Very cold	Jun 5
56	Big Timber Creek Abv Mouth At Leadore Id River	53.6°	12°	❄️ Cold	⛔ Very cold	Jun 5
57	East Fork Big Wood River At Gimlet Id River	53.1°	11.7°	❄️ Cold	⛔ Very cold	Sep 23
58	Kootenai River At Bonners Ferry Id River	53.1°	11.7°	❄️ Cold	⛔ Very cold	Jun 5
59	Nf Clearwater River Nr Canyon Ranger Station Id River	52.9°	11.6°	❄️ Cold	⛔ Very cold	Jun 5
60	Sf Coeur D Alene River Nr Pinehurst, Id River	52.9°	11.6°	❄️ Cold	⛔ Very cold	Sep 29
61	Kootenai River At Leonia, Id River	52.3°	11.3°	❄️ Cold	⛔ Very cold	Jun 5
62	Little Salmon River At Riggins Id River	52.2°	11.2°	❄️ Cold	⛔ Very cold	Sep 29
63	Sf Boise River Nr Featherville Id River	51.8°	11°	❄️ Cold	⛔ Very cold	Sep 29
64	Sf Coeur D Alene R At Bunker Ave At Kellogg Id Lake	51.6°	10.9°	❄️ Cold	⛔ Very cold	Sep 29
65	Pahsimeroi River At Ellis Id River	51.4°	10.8°	❄️ Cold	⛔ Very cold	Sep 29
66	Big Wood River Nr Ketchum Id River	51.3°	10.7°	❄️ Cold	⛔ Very cold	Jan 16
67	Snake River Nr Irwin Id River	50.9°	10.5°	❄️ Cold	⛔ Very cold	Nov 3
68	Sf Boise River At Anderson Ranch Dam Id River	50.5°	10.3°	❄️ Cold	⛔ Very cold	Sep 18
69	Sf Coeur D Alene River At Smelterville Id River	50.4°	10.2°	❄️ Cold	⛔ Very cold	Sep 29
70	Big Lost River At Howell Ranch Nr Chilly Id River	50.2°	10.1°	❄️ Cold	⛔ Very cold	Sep 29
71	Lemhi River Nr Lemhi Id River	49.6°	9.8°	❄️ Cold	⛔ Very cold	Sep 29
72	Sf Boise River At Neal Bridge Nr Arrowrock Dam Id River	48.7°	9.3°	❄️ Cold	⛔ Very cold	Jun 5
73	Kootenai River At Porthill Id River	48.7°	9.3°	❄️ Cold	⛔ Very cold	May 20
74	Nf Big Wood River Nr Sawtooth Nra Hq Nr Ketchum Id River	48.4°	9.1°	❄️ Cold	⛔ Very cold	Sep 23
75	Johnson Creek At Yellow Pine Id River	48.2°	9°	❄️ Cold	⛔ Very cold	Sep 29
76	Yankee Fork Salmon River Nr Clayton Id River	47.7°	8.7°	❄️ Cold	⛔ Very cold	Jun 5
77	Boise River Nr Parma Id River	46.8°	8.2°	❄️ Cold	⛔ Very cold	Apr 21
78	Efsf Salmon R Abv Sugar Crk Nr Stibnite, Id Lake	45.7°	7.6°	❄️ Cold	⛔ Very cold	Jun 5
79	Ef Of Sf Salmon River At Stibnite, Id River	45.3°	7.4°	❄️ Cold	⛔ Very cold	Jun 5
80	Sugar Creek Nr Stibnite, Id River	44.8°	7.1°	🧊 Very Cold	⛔ Very cold	Jun 5
81	Meadow Creek Nr Stibnite, Id River	43.9°	6.6°	🧊 Very Cold	⛔ Very cold	Jun 5
82	Kootenai River Tribal Hatchery Nr Bonners Ferry River	41.9°	5.5°	🧊 Very Cold	⛔ Very cold	Dec 31
83	Snake River Nr Murphy Id River	39.4°	4.1°	🧊 Very Cold	⛔ Very cold	Jan 8
84	Portneuf River At Pocatello Id River	39.4°	4.1°	🧊 Very Cold	⛔ Very cold	Nov 19
85	Mud Lake At Causeway Breach Lake	37.6°	3.1°	🧊 Very Cold	⛔ Very cold	Nov 14
86	Mores Creek Ab Robie Creek Nr Arrowrock Dam Id River	33.8°	1°	🧊 Very Cold	⛔ Very cold	Jul 31
87	Teton River Nr St Anthony Id River	32.5°	0.3°	🧊 Very Cold	⛔ Very cold	Feb 24
88	Henrys Fork Nr Rexburg Id Lake	32°	0°	🧊 Very Cold	⛔ Very cold	Dec 30
89	Sf Coeur D Alene R Abv Placer Cr At Wallace Id Lake	—	—	—	—	—
90	South Middleton Drain At Middleton Id Lake	—	—	—	—	—
91	St Maries River Nr Santa, Id River	—	—	—	—	—
92	Nf Big Lost River At Wild Horse Nr Chilly Id River	—	—	—	—	—
93	Henrys Fork Nr Lake Id Lake	—	—	—	—	—
94	Big Lost River Below Moore Div Nr Moore Id River	—	—	—	—	—
95	Teton River Ab South Leigh Creek Nr Driggs Id River	—	—	—	—	—
96	Snake River Bl Lower Salmon Falls Nr Hagerman Id River	—	—	—	—	—
97	Henrys Lake Nr Lake Id Lake	—	—	—	—	—
98	Grays Lake Div To Blackfoot R Basin Nr Wayan, Id Lake	—	—	—	—	—
99	Big Wood River At Gimlet, Id River	—	—	—	—	—
100	Salmon River Ab East Fork Nr Clayton Id River	—	—	—	—	—

Boise River Nr Twin Springs Id River

157.8°F

🔥 Hot

Efsf Salmon R Abv Meadow Crk Nr Stibnite, Id Lake

98.2°F

🔥 Hot

Lochsa River Nr Lowell Id River

68°F

🌤️ Comfortable

Ef Owyhee River At Crutcher Crossing, Id River

67.8°F

🌤️ Comfortable

Snake River At King Hill Id River

64.4°F

🌊 Cool

Portneuf River At Topaz Id River

63.7°F

🌊 Cool

Bruneau River Nr Hot Spring Id River

63.5°F

🌊 Cool

Nf Payette River At Cascade Id River

62.6°F

🌊 Cool

Silver Creek At Sportsman Access Nr Picabo Id River

62.4°F

🌊 Cool

Rock Creek Ab Hwy 30/93 Xing At Twin Falls Id River

62.1°F

🌊 Cool

Snake River At Nyssa Or River

61.7°F

🌊 Cool

Spokane River Near Post Falls, Id River

61.2°F

🌊 Cool

Payette River Nr Payette Id River

60.6°F

🌊 Cool

Snake River Gaging Station At Milner Id River

60.4°F

🌊 Cool

Snake River At Pigeon Cove Nr Twin Falls, Id River

60.4°F

🌊 Cool

Clark Fork River Below Cabinet Gorge Dam Id River

60.4°F

🌊 Cool

Malad River Nr Gooding Id River

60.3°F

🌊 Cool

Salmon River Nr Shoup Id River

60.1°F

🌊 Cool

Snake River At Mcduff Rapids At China Garden Id River

59.9°F

🌊 Cool

Snake River Nr Kimberly Id River

59.9°F

🌊 Cool

More Idaho Resources

🗺️ Idaho Water Levels 🎣 Weekly Fishing Report ⛵ Boat Ramp Status 🌵 Drought Conditions 🌡️ All States

❓ Idaho Water Temperature FAQ

What is the warmest lake in Idaho today?

Based on our latest USGS data, Boise River Nr Twin Springs Id is currently the warmest water body in Idaho at 157.8°F.

Which Idaho lakes are good for swimming right now?

Lakes with water temperatures above 72°F are generally comfortable for swimming. Currently, Idaho's average water temperature is 56.1°F — check individual lakes above for specific conditions.

What is the best water temperature for fishing in Idaho?

The optimal temperature range depends on your target species. For bass fishing, look for water bodies between 65–75°F. For trout, target the coldest water bodies in Idaho — typically 50–65°F. Use the table above to identify which lakes are in the ideal range for your target species.

🔬 Data Methodology & Sources

Water temperature readings on this site are collected from USGS (United States Geological Survey) monitoring stations installed at lakes, rivers, and reservoirs across the country. Sensors measure water surface temperature in Celsius, which is converted to Fahrenheit for display. Data is retrieved and stored daily. Temperatures shown reflect the most recent available sensor reading for each water body, typically from the past 1–30 days depending on station reporting frequency.

⚠️ Water temperatures can vary significantly across a water body due to depth, currents, and time of day. Sensor readings represent conditions at the monitoring station location. Always exercise caution when swimming and consult local authorities for official safety advisories.