Lahontan Reservoir — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lahontan Reservoir, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lahontan Reservoir today is 12.6°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 |
|---|---|---|---|
| APR 11 | 13.0°C | 6.6°C | |
| APR 12 | 12.3°C | 6.6°C | |
| APR 13 | 13.0°C | 6.6°C | |
| APR 14 | 12.7°C | 6.6°C | |
| APR 15 | 11.1°C | 6.6°C | |
| APR 16 | 11.0°C | 6.6°C | |
| APR 17 | 12.5°C | 6.6°C | |
| APR 18 | 12.6°C | 6.6°C | |
| APR 19 | 6.6°C | 12.3°C | |
| APR 20 | 6.6°C | 12.0°C | |
| APR 21 | 6.6°C | 11.7°C | |
| APR 22 | 6.6°C | 11.4°C | |
| APR 23 | 6.6°C | 11.1°C | |
| APR 24 | 6.6°C | 10.8°C | |
| APR 25 | 6.6°C | 10.5°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 | 3°C | 6°C |
| February | 0°C | 4°C | 8°C |
| March | 0°C | 6°C | 13°C |
| April | 0°C | 7°C | 14°C |
| May | 11°C | 15°C | 18°C |
| June | 16°C | 19°C | 21°C |
| July | 20°C | 23°C | 25°C |
| August | 20°C | 23°C | 25°C |
| September | 18°C | 21°C | 23°C |
| October | 11°C | 16°C | 20°C |
| November | 4°C | 9°C | 13°C |
| December | 0°C | 4°C | 9°C |
Lahontan Reservoir: Water Temperature by Location
Lahontan Reservoir: Weather Forecast
April 18
April 19
April 20
April 21
Location & Local Information
Lahontan Reservoir (Lake Lahontan) in Nevada experiences strong seasonal variation in surface water temperature because it sits in an arid region with large daily and seasonal swings. In winter the reservoir commonly cools to near freezing, roughly 34–45°F (1–7°C). Spring temperatures typically rise into the mid‑40s to mid‑60s°F (7–18°C) as runoff and warming air increase surface warmth. Peak summer surface temperatures are most favorable for swimming, often reaching about 70–85°F (21–29°C) on warm afternoons, while autumn sees a gradual decline into the 50s to upper 60s°F (10–20°C) depending on weather and water depth. Deeper water remains colder year‑round and surface patches can vary with wind and shade.
Swimming is generally allowed at Lahontan because it is a managed recreation area that supports boating, fishing, and water play, but it is subject to posted rules and seasonal conditions. Because water can be unexpectedly cold outside midsummer, and because there are hazards such as fluctuating water levels, boat traffic, sudden drop‑offs, and typically no lifeguards at many sites, swimmers are advised to use designated swim areas when available, wear flotation if uncertain, and observe local advisories for safety.