Boise — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Boise, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Boise 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 | 22.8°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: Weather Forecast
September 1
September 2
September 3
September 4
September 5
September 6
Location & Local Information
The Boise River, flowing through the city of Boise, Idaho, offers a variety of recreational activities, although swimming is generally not the most popular choice due to the river's varying conditions. During the warmer months, typically in late spring and summer, the water temperature in the Boise River can range from 60°F to 70°F (15°C to 21°C). While this temperature may feel refreshing on a hot day, the river's swift currents and the potential presence of rocks and debris make it less ideal for casual swimming.
That being said, the Boise River is a popular destination for activities such as tubing, kayaking, and paddleboarding. These activities are especially enjoyed during the summer, when the water temperature is more tolerable, and the river's flow provides a fun, natural current for tubing. For those looking to cool off, the river provides a refreshing spot, but it's best to enjoy it through these other recreational options rather than swimming.
For a more traditional swimming experience, Boise offers a number of community pools and nearby lakes where the water is calmer and more suitable for swimming. The proximity of the city to outdoor destinations also provides opportunities to visit nearby reservoirs and lakes, where water temperatures may rise to more comfortable levels for swimmers, typically around 70°F to 75°F (21°C to 24°C) in the summer months. These locations offer a safer and more enjoyable alternative for swimming enthusiasts.