Green Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Green Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Green Lake today is 19.1°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 | 18.1°C | 17.5°C | |
| JUN 4 | 18.1°C | 17.5°C | |
| JUN 5 | 18.3°C | 17.5°C | |
| JUN 6 | 18.4°C | 17.5°C | |
| JUN 7 | 18.6°C | 17.5°C | |
| JUN 8 | 18.8°C | 17.5°C | |
| JUN 10 | 19.1°C | 17.5°C | |
| JUN 11 | 17.5°C | 19.0°C | |
| JUN 12 | 17.5°C | 18.9°C | |
| JUN 13 | 17.5°C | 18.9°C | |
| JUN 14 | 17.5°C | 18.8°C | |
| JUN 15 | 17.5°C | 18.7°C | |
| JUN 16 | 17.5°C | 18.6°C | |
| JUN 17 | 17.5°C | 18.5°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 | 1°C | 4°C | 7°C |
| February | 0°C | 4°C | 8°C |
| March | 0°C | 5°C | 9°C |
| April | 3°C | 9°C | 14°C |
| May | 9°C | 16°C | 23°C |
| June | 13°C | 18°C | 22°C |
| July | 17°C | 21°C | 25°C |
| August | 20°C | 24°C | 27°C |
| September | 12°C | 17°C | 22°C |
| October | 12°C | 16°C | 19°C |
| November | 0°C | 6°C | 12°C |
| December | 0°C | 3°C | 6°C |
Green Lake: Water Temperature by Location
Green Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Green Lake in Michigan follows the pattern typical of inland temperate lakes, with surface water temperatures varying substantially by season and weather. In spring the lake is cold as it mixes and warms, often ranging from about 35–55°F (2–13°C). By summer, surface temperatures commonly reach comfortable levels for recreation, roughly 68–78°F (20–26°C), though shallow bays can warm a few degrees higher on hot, calm days. In autumn the water cools again, typically falling to 45–60°F (7–16°C) as fall turnover begins, and in winter surface temperatures approach freezing — around 32–39°F (0–4°C) — especially when ice forms. These figures describe typical surface readings; deeper water remains colder year-round and actual temperatures vary with weather, depth, and the specific year.
Swimming at Green Lake is generally permitted and practiced in summer because surface temperatures reach ranges that most swimmers find comfortable. Public access points and beaches, where present, are the usual spots for swimming; however local rules, private property boundaries, water-quality advisories, or closures can restrict access. Late-summer harmful algal blooms or elevated bacterial counts sometimes prompt temporary bans for health reasons, and winter conditions with ice and very cold water make swimming unsafe except for organized, well-prepared ice-swimming events. Visitors should heed posted signs and local health advisories before entering the water.