Boise River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the Boise River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the Boise River today is 22.7°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience. 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 |
|---|---|---|---|
| AUG 24 | 24.3°C | 21.6°C | |
| AUG 25 | 24.2°C | 21.6°C | |
| AUG 26 | 24.2°C | 21.6°C | |
| AUG 27 | 23.2°C | 21.6°C | |
| AUG 28 | 23.0°C | 21.6°C | |
| AUG 29 | 23.0°C | 21.6°C | |
| AUG 30 | 22.7°C | 21.6°C | |
| AUG 31 | 22.7°C | 21.6°C | |
| SEP 1 | 17.0°C | 22.4°C | |
| SEP 2 | 17.0°C | 22.1°C | |
| SEP 3 | 17.0°C | 21.8°C | |
| SEP 4 | 17.0°C | 21.6°C | |
| SEP 5 | 17.0°C | 21.3°C | |
| SEP 6 | 17.0°C | 21.0°C | |
| SEP 7 | 17.0°C | 20.7°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 | 1°C | 5°C | 9°C |
| February | 1°C | 5°C | 9°C |
| March | 3°C | 7°C | 11°C |
| April | 5°C | 10°C | 16°C |
| May | 8°C | 13°C | 21°C |
| June | 14°C | 19°C | 22°C |
| July | 17°C | 22°C | 28°C |
| August | 17°C | 22°C | 27°C |
| September | 11°C | 17°C | 23°C |
| October | 8°C | 14°C | 20°C |
| November | 3°C | 8°C | 16°C |
| December | 3°C | 5°C | 8°C |
Boise River: Water Temperature by Location
Boise River: Weather Forecast
September 1
September 2
September 3
September 4
September 5
September 6
Location & Local Information
Source Sawtooth Range
• location Idaho
• elevation 3,497 ft (1,066 m)
Mouth Snake River
• location Idaho
• elevation 2,100 ft (640 m)
Length 102 mi (164 km)
The Boise River, flowing through the city of Boise in southwestern Idaho, is known for its clear waters and recreational opportunities. The river’s water temperature is generally cool, with summer temperatures typically ranging from the mid-50s to low 60s Fahrenheit (13-18°C). While this is refreshing during the hot summer months, it is still on the cooler side, especially compared to warmer lakes or pools. In the winter months, the water temperature drops significantly due to snowmelt and cold air, which can bring the temperature down into the low 40s (5-10°C).
Swimming in the Boise River is popular during the summer, especially in areas where the river's flow is calmer. The river features several parks and access points, such as the Boise River Greenbelt, where locals and visitors enjoy activities like tubing, wading, and swimming. The river’s clear, fresh water provides an inviting environment for those seeking relief from the summer heat. However, swimmers should be cautious of the strong currents in certain sections, particularly in areas where the flow is faster or the water is deeper.
While swimming is possible in the Boise River, it is often more known for tubing and kayaking, as its flow offers ideal conditions for these activities. The river is also a popular spot for fishing and enjoying the scenic beauty of the Boise area. For those specifically looking to swim, calmer sections and designated swimming areas provide a safe and enjoyable experience. The Boise River remains a key natural resource for recreation and a beloved spot for outdoor activities.