Henrys Fork River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Henrys Fork River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Henrys Fork River today is 12.2°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| OCT 5 | 11.9°C | 12.5°C | |
| OCT 6 | 11.5°C | 12.5°C | |
| OCT 7 | 12.2°C | 12.5°C | |
| OCT 8 | 11.9°C | 12.5°C | |
| OCT 9 | 11.6°C | 12.5°C | |
| OCT 10 | 11.8°C | 12.5°C | |
| OCT 11 | 11.4°C | 12.5°C | |
| OCT 12 | 12.0°C | 12.5°C | |
| OCT 13 | 12.5°C | 12.2°C | |
| OCT 14 | 12.5°C | 12.2°C | |
| OCT 15 | 12.5°C | 12.2°C | |
| OCT 16 | 12.5°C | 12.3°C | |
| OCT 17 | 12.5°C | 12.3°C | |
| OCT 18 | 12.5°C | 12.3°C | |
| OCT 19 | 12.5°C | 12.3°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 2°C | 6°C | 9°C |
| February | 2°C | 6°C | 9°C |
| March | 3°C | 7°C | 11°C |
| April | 4°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 14°C | 18°C | 22°C |
| July | 16°C | 21°C | 26°C |
| August | 17°C | 22°C | 27°C |
| September | 11°C | 18°C | 24°C |
| October | 8°C | 13°C | 17°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 5°C | 8°C |
Henrys Fork River: Water Temperature by Location
Henrys Fork River: Weather Forecast
October 13
October 14
October 15
October 16
October 17
Location & Local Information
Source:
• location near Island Park, Fremont County, Idaho
• elevation 6,397 ft (1,950 m)
Mouth Snake River
• location southwest of Rexburg, Madison County, Idaho
Length 127 mi (204 km)
Henrys Fork, a tributary of the Snake River in Idaho, is renowned for its crystal-clear waters and exceptional fly fishing. Fed by springs and snowmelt from the surrounding mountains, the river’s water temperature stays relatively cool throughout the year. During spring and early summer, the water is cold, often between 40°F and 55°F (4°C to 13°C), due to snowmelt. In late summer, especially in slower-moving stretches, the water can warm slightly to around 60°F–65°F (15°C–18°C), though it remains refreshingly cool.
Swimming in Henrys Fork is less common compared to other recreational activities like fishing, kayaking, and rafting. The river’s cool temperatures and swift currents in some areas make it more suitable for short dips or wading rather than extended swimming. However, there are calmer stretches, particularly near campgrounds and parks, where visitors can enjoy the water safely during warmer months. Overall, Henrys Fork is prized for its natural beauty and outdoor adventure opportunities rather than as a primary swimming destination.