Green Bay — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Green Bay, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Green Bay 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 |
|---|---|---|---|
| OCT 12 | 14.6°C | 14.0°C | |
| OCT 13 | 14.5°C | 14.0°C | |
| OCT 14 | 15.3°C | 14.0°C | |
| OCT 15 | 15.7°C | 14.0°C | |
| OCT 16 | 14.8°C | 14.0°C | |
| OCT 17 | 15.1°C | 14.0°C | |
| OCT 18 | 14.8°C | 14.0°C | |
| OCT 19 | 13.0°C | 14.0°C | |
| OCT 20 | 14.0°C | 12.7°C | |
| OCT 21 | 14.0°C | 12.7°C | |
| OCT 22 | 14.0°C | 12.8°C | |
| OCT 23 | 14.0°C | 12.9°C | |
| OCT 24 | 14.0°C | 13.0°C | |
| OCT 25 | 14.0°C | 13.0°C | |
| OCT 26 | 14.0°C | 13.1°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 | 6°C |
| February | -1°C | 1°C | 3°C |
| March | -1°C | 3°C | 6°C |
| April | 0°C | 6°C | 12°C |
| May | 3°C | 12°C | 20°C |
| June | 8°C | 15°C | 22°C |
| July | 16°C | 22°C | 29°C |
| August | 16°C | 21°C | 26°C |
| September | 13°C | 18°C | 24°C |
| October | 8°C | 14°C | 20°C |
| November | 4°C | 10°C | 15°C |
| December | 1°C | 5°C | 8°C |
Location & Local Information
Green Bay, Wisconsin, is located along the western shore of Lake Michigan, offering beautiful views and a variety of recreational activities on the water. The temperature of Lake Michigan near Green Bay can vary greatly depending on the time of year. During the summer months, the water temperature typically ranges from 60°F to 70°F (16°C to 21°C). While these temperatures are relatively cool, they can still provide a refreshing experience for those engaging in water activities like boating, kayaking, and paddleboarding. However, the water is often too cold for comfortable swimming, especially early in the season when the lake’s temperatures are still influenced by colder spring conditions.
Swimmers in Green Bay may find the lake's cool waters challenging for extended swimming, especially in the earlier part of the summer. As the season progresses, some people do take a dip, but the chilly waters can make it less inviting for a casual swim. The lake’s beaches and parks, such as Bay Beach, are popular for relaxation, picnicking, and enjoying the views, even if swimming isn’t the main focus for many visitors. People often opt for other water-based activities like fishing or taking boat tours to explore the bay area.
For those looking for warmer options, Green Bay also has public pools where the water temperature is maintained at a more comfortable range, around 78°F to 82°F (25°C to 28°C), ideal for swimming. Additionally, nearby smaller lakes and inland waterways may offer warmer swimming conditions, especially as the summer progresses, attracting those who want to enjoy a more traditional swimming experience without the cooler temperatures of Lake Michigan.