Lake Hayden — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Hayden, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Hayden today is 12.7°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 | 14.2°C | 14.0°C | |
| OCT 6 | 14.2°C | 14.0°C | |
| OCT 7 | 14.2°C | 14.0°C | |
| OCT 8 | 14.2°C | 14.0°C | |
| OCT 9 | 13.6°C | 14.0°C | |
| OCT 10 | 13.8°C | 14.0°C | |
| OCT 11 | 14.3°C | 14.0°C | |
| OCT 12 | 13.7°C | 14.0°C | |
| OCT 13 | 14.0°C | 12.8°C | |
| OCT 14 | 14.0°C | 12.8°C | |
| OCT 15 | 14.0°C | 12.9°C | |
| OCT 16 | 14.0°C | 13.0°C | |
| OCT 17 | 14.0°C | 13.0°C | |
| OCT 18 | 14.0°C | 13.1°C | |
| OCT 19 | 14.0°C | 13.2°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 | 0°C | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 1°C | 3°C | 6°C |
| April | 1°C | 6°C | 11°C |
| May | 6°C | 11°C | 17°C |
| June | 14°C | 18°C | 21°C |
| July | 19°C | 22°C | 25°C |
| August | 21°C | 23°C | 26°C |
| September | 16°C | 20°C | 25°C |
| October | 11°C | 14°C | 17°C |
| November | 4°C | 9°C | 13°C |
| December | 3°C | 5°C | 8°C |
Lake Hayden: Water Temperature by Location
Lake Hayden: Weather Forecast
October 13
October 14
October 15
October 16
October 17
October 18
Location & Local Information
Lake Hayden in northern Idaho experiences a wide range of surface water temperatures through the year because of its inland, temperate setting and varying depths. In spring the lake commonly runs about 40–60°F (4–15°C) as runoff and cooler air keep waters chilly. By early to mid‑summer surface temperatures typically rise into the 60s and low 70s °F (15–24°C), and shallow, sun‑warmed bays can briefly reach the mid‑70s °F (24–26°C) on hot afternoons. Into fall the surface cools back toward the 50s and 40s °F (10–5°C), and in winter the lake often falls to near freezing, roughly 32–39°F (0–4°C), with ice possible in cold spells.
Swimming at Lake Hayden is generally allowed and is a popular recreational activity where public access or private waterfront permits it, but conditions vary. Water quality is monitored periodically, and advisories for algae or bacterial contamination can temporarily restrict swimming. Even in summer, deeper water and shaded areas remain notably colder and can produce cold‑water shock, so swimmers should be cautious, use flotation when appropriate, and heed posted signs and local guidance for safe swimming.