Lake Thomas A Edison — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Thomas A Edison, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Thomas A Edison today is 14.8°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 |
|---|---|---|---|
| SEP 14 | 16.4°C | 19.0°C | |
| SEP 15 | 16.4°C | 19.0°C | |
| SEP 16 | 15.8°C | 19.0°C | |
| SEP 17 | 16.1°C | 19.0°C | |
| SEP 18 | 15.7°C | 19.0°C | |
| SEP 19 | 15.7°C | 19.0°C | |
| SEP 20 | 15.0°C | 19.0°C | |
| SEP 21 | 14.8°C | 19.0°C | |
| SEP 22 | 19.0°C | 15.0°C | |
| SEP 23 | 19.0°C | 15.2°C | |
| SEP 24 | 19.0°C | 15.4°C | |
| SEP 25 | 19.0°C | 15.6°C | |
| SEP 26 | 19.0°C | 15.9°C | |
| SEP 27 | 19.0°C | 16.1°C | |
| SEP 28 | 19.0°C | 16.3°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 | 5°C | 11°C | 17°C |
| February | 4°C | 11°C | 17°C |
| March | 6°C | 11°C | 16°C |
| April | 6°C | 12°C | 18°C |
| May | 9°C | 14°C | 19°C |
| June | 11°C | 15°C | 19°C |
| July | 15°C | 20°C | 24°C |
| August | 17°C | 21°C | 24°C |
| September | 16°C | 19°C | 22°C |
| October | 12°C | 17°C | 21°C |
| November | 7°C | 14°C | 20°C |
| December | 5°C | 9°C | 12°C |
Lake Thomas A Edison: Water Temperature by Location
Lake Thomas A Edison: Weather Forecast
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake Thomas A. Edison sits in the high Sierra and is fed largely by snowmelt, so its water remains relatively cold year-round. Surface temperatures typically run roughly 35–50°F (2–10°C) in spring as snowmelt feeds the reservoir, rise to about 50–65°F (10–18°C) during the warmest summer months, fall back to roughly 40–55°F (4–13°C) in autumn, and can approach freezing in winter, especially at the surface where ice and near‑32°F (0°C) conditions are possible in colder years. Because of depth, wind, and inflowing snowmelt, deeper water stays several degrees colder than the surface even in summer.
Swimming at Lake Thomas A. Edison is generally possible but not formally supervised or developed with lifeguard‑protected beaches; people do swim in summer when surface temperatures are highest. Caution is advised because cold water greatly increases the risk of hypothermia, reduces swimming endurance, and can cause cold‑water shock. In addition, fluctuating water levels, submerged hazards, strong currents near inlets and outlets, and seasonal access limits due to snow can make recreation hazardous. Short, conservative swims with a companion, a wetsuit in cooler conditions, and attention to local signage and seasonal restrictions are recommended.