Mayfield Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mayfield Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mayfield Lake today is 21°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 | 21.3°C | 24.5°C | |
| AUG 25 | 20.9°C | 24.5°C | |
| AUG 26 | 20.9°C | 24.5°C | |
| AUG 27 | 20.9°C | 24.5°C | |
| AUG 28 | 21.0°C | 24.5°C | |
| AUG 29 | 21.3°C | 24.5°C | |
| AUG 30 | 21.3°C | 24.5°C | |
| AUG 31 | 21.0°C | 24.5°C | |
| SEP 1 | 21.5°C | 21.0°C | |
| SEP 2 | 21.5°C | 21.1°C | |
| SEP 3 | 21.5°C | 21.1°C | |
| SEP 4 | 21.5°C | 21.1°C | |
| SEP 5 | 21.5°C | 21.1°C | |
| SEP 6 | 21.5°C | 21.2°C | |
| SEP 7 | 21.5°C | 21.2°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 | 4°C | 8°C |
| February | 2°C | 5°C | 8°C |
| March | 1°C | 6°C | 11°C |
| April | 3°C | 9°C | 15°C |
| May | 10°C | 16°C | 21°C |
| June | 13°C | 19°C | 24°C |
| July | 16°C | 24°C | 31°C |
| August | 19°C | 25°C | 30°C |
| September | 17°C | 22°C | 26°C |
| October | 12°C | 16°C | 20°C |
| November | 6°C | 10°C | 14°C |
| December | 4°C | 7°C | 10°C |
Mayfield Lake: Water Temperature by Location
Mayfield Lake: Weather Forecast
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Location & Local Information
Mayfield Lake, a reservoir on the Cowlitz River in southwestern Washington, typically runs cool for much of the year. Winter surface temperatures often sit in the mid-30s to mid-40s °F (about 1–7 °C). Spring brings gradual warming to roughly 45–60 °F (7–16 °C). The warmest period is usually midsummer, when sheltered surface areas can reach the mid-60s to low 70s °F (about 18–22 °C) on hot, sunny days. As fall progresses the water commonly drops back into the 50s °F (10–15 °C). These are general seasonal ranges; local conditions, depth, weather and dam releases can cause considerable short-term variation.
Swimming is generally possible at Mayfield Lake and people do swim there, particularly in late July and August when surface temperatures are highest. However, it is not the warmest swimming destination; even in summer the water can feel brisk, and sudden cold currents from deeper water or dam operations are a hazard. Boat traffic, steep drop-offs and typically no lifeguard coverage mean swimmers should exercise caution, use personal flotation devices if unsure, and avoid swimming alone. Many swimmers prefer short dips or wearing a wetsuit when temperatures are below the low 60s °F (around 16 °C).