Salmon River Conditions
Salmon River near Riggins, Idaho
This gauge applies to all Riggins-based trips, including half-day and full-day rafting trips, as well as Lower Salmon and Salmon River High Adventure Base trips.
Water Temperature
Salmon River Near Shoup, Idaho
This gauge is located upstream of the Main Salmon and further upstream of Riggins. Changes here often show up later in Riggins and on the Lower Salmon.
Water Temperature
Middle Fork of the Salmon
This gauge is located near Middle Fork Lodge and is referenced by private and commercial rafters.
Stage height is shown in feet rather than flow volume. This measurement is used to assess low, moderate, or high water conditions on the Middle Fork.
Water temperature data is not available on the Middle Fork. This river runs much colder than the Main or Lower Salmon further downriver.
Understanding River Flows
These flow ranges apply to trips in the Riggins area, Main and Lower Salmon based on the gauge near Riggins at White Bird, Idaho.
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5,000 to 20,000 CFS
Typical summer flows. Best for kids, youth groups, and first-time rafters but still provides a wild, fun ride!
We typically run Lower Salmon River trips only under 20,000 CFS. -
20,000–30,000 CFS
Moderate water. Faster current and larger features. Better for those seeking a wilder ride but manageable will experienced guides. -
30,000–40,000 CFS
Higher water. A significant amount of water with powerful current and big, powerful waves. -
45,000 CFS and above
High water in the Riggins area. Large features, fast current, and advanced conditions.
Low Water
Late summer flows in Riggins can drop as low as approximately 3,000 CFS. Even at these levels, the Salmon River still carries more water than many rafting rivers across the country.
Snake River Conditions
Snake River near Hagerman, Idaho
River flows on the Hagerman are regulated by dams for hydropower demand providing consistent minimum flow around 5,000 CFS nearly year round.
View current flow here.
Water Temperature
Snake River near Murtaugh, Idaho
The Murtaugh runs dry for most of the year as water is diverted for irrigation demand. It typically runs for short periods during spring and early summer. The rapids and difficulty vary dramatically with different flows.
View current flow here.
River Flow Forecasts
Long-range river flow forecasts are influenced by snowpack, weather patterns, and runoff timing, and can be difficult to predict precisely. We monitor several hydrologic and weather tools to track trends and guide seasonal planning. The resources below provide helpful context for anticipating conditions, but should be viewed as guidance rather than guarantees.
Forecasting Resources:
Forecast - Salmon River Near Riggins
Idaho Snowpack
Snow Weather and Flow Blog
River data is provided by the U.S. Geological Survey and is considered provisional. Conditions can change quickly due to weather, snowmelt, and dam operations. Always contact us if you have questions about current conditions for your trip.
Frequently Asked Questions
What is a good flow for rafting the Salmon River?
A good flow for rafting the Salmon River depends on the section and the experience level of your group. In the Riggins area, flows 3,000 to 20,000 CFS are typical summer conditions and are well suited for kids, youth groups, and first-time rafters. Higher flows create faster current, larger waves, and a more powerful ride.
What river flow is best for kids?
For most kids and families, flows under 20,000 CFS in the Riggins area provide the best balance of fun and comfort. These flows still offer exciting whitewater while remaining appropriate for younger and first-time rafters. With experienced guides, higher flows can be manageable but are better for older youth.
How cold is the Salmon River?
Water temperatures on the Salmon River vary by season. Water temperatures generally warm through the summer and often peak in July and August, when temperatures can exceed 75°F, making it some of the warmest and most enjoyable rafting conditions around. Early season and shoulder season trips are typically cold and may require wetsuits or splash gear for a comfortable experience.
Is the Middle Fork of the Salmon River colder than other sections?
Yes. The Middle Fork of the Salmon River is typically colder year-round than downstream sections of the Salmon River. Due to its wilderness location, water temperature data is limited, and guests should plan for cold water conditions regardless of the time of year.
What does CFS mean for river conditions?
CFS stands for cubic feet per second and measures how much water is flowing past a point in the river. Higher CFS generally means faster current and larger waves, while lower CFS often means slower current with more technical maneuvering.
Is low water still fun on the Salmon River?
Yes. Low water on the Salmon River can still be a great experience. Late summer flows in the Riggins area can drop to around 3,000 CFS, which is still significantly more water than many rafting rivers across the country. Even at low flows, the Salmon River offers fun wave trains and engaging whitewater all summer long.
Is August still a good time to raft the Salmon River?
Absolutely. August is one of the most popular times to raft the Salmon River. Water temperatures are typically warm, flows are stable, and conditions are ideal for families, youth groups, and first-time rafters.
What should I wear for cold water rafting?
Cold water rafting can still be a blast if you dress appropriately. Depending on conditions, guides may recommend neoprene socks, wetsuits, splash gear, and insulating layers to help you stay warm and comfortable on the river.
How accurate are river flow forecasts?
Short-term river forecasts can be helpful, but long-range flow forecasts are influenced by snowpack, weather patterns, and runoff timing and are inherently uncertain. Forecasts should be viewed as guidance rather than guarantees.
Why do some rivers not show water temperature data?
Some river gauges are located in remote areas where temperature sensors are intermittent or unavailable. In these cases, flow data is still reliable, and guides plan trips assuming cold water conditions when temperature data is limited.
How do I know which river trip is right for my group?
The best way to choose a trip is to consider current river conditions, group size, age range, and experience level. If you’re unsure, contact our team and we’ll help match your group to the right river and trip.
