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Arrowrock Reservoir
Arrowrock Reservoir Current Water Temperature and Forecast
On this page, you will find comprehensive information about the water temperature in Arrowrock Reservoir, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Current Lake Water Temperature Information
40°F
TODAY
39°F
YESTERDAY
41°F
A WEEK AGO
As of today, the minimum water temperature in the Arrowrock Reservoir ranges less than 41°F (5°C). Such water is extremely cold and not recommended for swimming without proper preparation. In these conditions, the risk of hypothermia is very high, and prolonged exposure to the water can be hazardous to your health. If you decide to swim, it is important to have the appropriate gear, such as a wetsuit. Typically, only experienced swimmers or those who practice winter swimming venture into such waters.
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.
Analysis, Historical Data, and Forecast of Water Temperature
Water Temperature Chart for Arrowrock Reservoir Over the Last 30 Days
Today the water temperature in Arrowrock Reservoir is lower than the same day in previous years. The water temperature range here in March is from 36°F to 48°F. The water temperature has decreased over the past 7 days but has increased over the past month.
The forecasted water temperature values for Arrowrock Reservoir are presented in the table below.
The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.
Daily Water Temperature Chart
| Date | Current | Average | Forecast |
|---|---|---|---|
| Mar 20 | 41°F | 42°F | |
| Mar 21 | 41°F | 42°F | |
| Mar 22 | 41°F | 42°F | |
| Mar 23 | 41°F | 42°F | |
| Mar 24 | 42°F | 42°F | |
| Mar 25 | 39°F | 42°F | |
| Mar 26 | 39°F | 42°F | |
| Mar 27 | 40°F | 42°F | |
| Mar 28 | 42°F | 40°F | |
| Mar 29 | 42°F | 40°F | |
| Mar 30 | 42°F | 41°F | |
| Mar 31 | 42°F | 41°F | |
| Apr 1 | 48°F | 41°F | |
| Apr 2 | 48°F | 42°F | |
| Apr 3 | 48°F | 42°F | |
| Apr 4 | 48°F | 42°F |
Water Temperature Ranges in Arrowrock Reservoir by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 35°F | 39°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 34°F | 38°F | 43°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 36°F | 42°F | 48°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 43°F | 48°F | 52°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 54°F | 58°F | 63°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 61°F | 65°F | 70°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 70°F | 74°F | 79°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 66°F | 71°F | 75°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 64°F | 69°F | 73°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 57°F | 61°F | 66°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 50°F | 54°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 32°F | 37°F | 41°F |
Monthly Water Temperature Histogram for Arrowrock Reservoir
Known Beaches in the Area of Arrowrock Reservoir?
Macks Creek Park
Macks Creek Park is a 1-stars sandy beach, located in a 9 km (6 miles) radius of Arrowrock Reservoir.
Arrowrock Reservoir Weather
MARCH 28
43°F / 68°F
moderate drizzlerain: 32% | wind: 14 mph
MARCH 29
37°F / 52°F
moderate drizzlerain: 32% | wind: 17 mph
MARCH 30
39°F / 55°F
overcastrain: 13% | wind: 14 mph
MARCH 31
41°F / 55°F
moderate drizzlerain: 54% | wind: 16 mph
APRIL 1
37°F / 54°F
light drizzlerain: 54% | wind: 13 mph
Water Temperature in Arrowrock Reservoir: General Trends and Swimming Opportunities
Arrowrock Reservoir is located in the state of Idaho, in the counties of Boise, Elmore, at an elevation of 3172 feet (967 meters) above sea level.
Arrowrock Reservoir is a small lake. Its surface area is 3.57 sq mi (9.26 sq km). These are small water bodies often used for recreation, fishing, or irrigation.
The water temperature in Arrowrock Reservoir varies throughout the year, ranging from 32°F (0°C) in January to 79°F (26°C) in July. The average annual water temperature of the lake is 54°F (12°C). The months when the average water temperature in Arrowrock Reservoir exceeds 68 degrees Fahrenheit (20°C) are July, August and September.
The nearest cities ans towns to Arrowrock Reservoir are: Idaho City, Boise, Garden City, Hidden Spring, Eagle, Meridian in Idaho.
Geographical Location of Arrowrock Reservoir
Frequently Asked Questions About Arrowrock Reservoir and its Water Temperatures
What is the current water temperature in Arrowrock Reservoir?
The water temperature today in Arrowrock Reservoir is 40°F (4.5°C).
What is the water temperature in Arrowrock Reservoir during the summer months?
The average water temperature in Arrowrock Reservoir during the summer months is typically between 65°F to 74°F (18°C to 23°C), and it can reach up to 79°F (26°C) at its warmest. However, in some years, the temperature may exceed this range.
What is the water temperature in Arrowrock Reservoir in May?
The average water temperature in Arrowrock Reservoir in May ranges from 54°F to 63°F (12°C to 17°C).
What is the water temperature in Arrowrock Reservoir in September?
The average water temperature in Arrowrock Reservoir in September is typically between 64°F to 73°F (18°C to 23°C).
Where is Arrowrock Reservoir located?
Arrowrock Reservoir is located in the United States in the state of Idaho, in the counties of Boise, Elmore, at an elevation of 3172 feet (967 meters) above sea level. The surface area of the lake is 3.575 sq mi (9.26 sq km).
Is it possible to swim in Arrowrock Reservoir and what are the possibilities for this?
Yes, swimming is possible in Arrowrock Reservoir, Idaho. However, local regulations, weather conditions, and water levels should be checked for safety and accessibility before planning a swim.
What are the coordinates of Arrowrock Reservoir?
Arrowrock Reservoir is located at coordinates 43.6150°N 115.8230°W.
Is Lake Arrowrock Reservoir a popular vacation spot among Americans?
Arrowrock Reservoir enjoys local popularity among the residents of State Idaho, and nationally, it ranks in the top 10 percent of all lakes in the country.
What species of fish can be found in Arrowrock Reservoir?
Arrowrock Reservoir is home to fish species such as Rainbow trout (best caught in Spring, Fall), Smallmouth bass (Spring, Fall), Yellow perch (Spring, Winter), Bull trout (Fall), Mountain whitefish (Fall, Winter).