Mona Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Mona Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Mona Lake today is 21.2°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 |
|---|---|---|---|
| JUN 3 | 20.4°C | 22.5°C | |
| JUN 4 | 20.4°C | 22.5°C | |
| JUN 5 | 20.6°C | 22.5°C | |
| JUN 6 | 20.7°C | 22.5°C | |
| JUN 7 | 21.0°C | 22.5°C | |
| JUN 8 | 21.0°C | 22.5°C | |
| JUN 10 | 21.2°C | 22.5°C | |
| JUN 11 | 22.5°C | 21.3°C | |
| JUN 12 | 22.5°C | 21.3°C | |
| JUN 13 | 22.5°C | 21.4°C | |
| JUN 14 | 22.5°C | 21.5°C | |
| JUN 15 | 22.5°C | 21.5°C | |
| JUN 16 | 22.5°C | 21.6°C | |
| JUN 17 | 22.5°C | 21.7°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 | 5°C | 8°C |
| February | 1°C | 5°C | 9°C |
| March | 1°C | 7°C | 12°C |
| April | 4°C | 10°C | 16°C |
| May | 8°C | 13°C | 19°C |
| June | 14°C | 23°C | 31°C |
| July | 20°C | 25°C | 29°C |
| August | 23°C | 26°C | 28°C |
| September | 18°C | 22°C | 26°C |
| October | 13°C | 19°C | 25°C |
| November | 4°C | 9°C | 13°C |
| December | 0°C | 3°C | 6°C |
Mona Lake: Water Temperature by Location
Mona Lake: Weather Forecast
June 9
June 10
June 11
June 12
Location & Local Information
Mona Lake’s water temperatures vary widely through the year. In spring the lake is cold as it thaws, commonly ranging from about 40–55°F (4–13°C). Summer brings the warmest conditions, with surface temperatures often between roughly 68–78°F (20–26°C) in July and August, though shallow, sheltered bays can warm a few degrees higher on hot days. By autumn the water cools back toward about 50–65°F (10–18°C), and in winter the lake typically approaches freezing; surface temperatures commonly sit near 32°F (0°C) where ice forms, or a few degrees above freezing in open water.
Swimming is generally allowed at public access points around Mona Lake and at local parks during the warm months, and these areas are used for recreational swimming when conditions are safe. Municipal authorities or health departments periodically monitor water quality, so beaches may be closed temporarily for bacterial contamination or harmful algal blooms. Boaters and channel currents can create localized hazards, so swimmers are advised to use designated beach areas, heed posted advisories, and be mindful of cold-water shock early and late in the season.