Ham Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Ham Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Ham Lake today is 18.3°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 |
|---|---|---|---|
| SEP 14 | 20.0°C | 21.5°C | |
| SEP 15 | 20.0°C | 21.5°C | |
| SEP 16 | 19.1°C | 21.5°C | |
| SEP 17 | 18.5°C | 21.5°C | |
| SEP 18 | 18.0°C | 21.5°C | |
| SEP 19 | 18.4°C | 21.5°C | |
| SEP 20 | 18.3°C | 21.5°C | |
| SEP 22 | 21.5°C | 18.5°C | |
| SEP 23 | 21.5°C | 18.6°C | |
| SEP 24 | 21.5°C | 18.8°C | |
| SEP 25 | 21.5°C | 18.9°C | |
| SEP 26 | 21.5°C | 19.1°C | |
| SEP 27 | 21.5°C | 19.3°C | |
| SEP 28 | 21.5°C | 19.4°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 | 3°C | 6°C |
| February | 0°C | 3°C | 6°C |
| March | 0°C | 2°C | 5°C |
| April | 3°C | 9°C | 15°C |
| May | 10°C | 16°C | 22°C |
| June | 16°C | 22°C | 27°C |
| July | 21°C | 24°C | 27°C |
| August | 20°C | 24°C | 28°C |
| September | 18°C | 22°C | 25°C |
| October | 6°C | 13°C | 19°C |
| November | 3°C | 7°C | 11°C |
| December | 1°C | 4°C | 7°C |
Ham Lake: Water Temperature by Location
Ham Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Ham Lake, like many small lakes in northern Minnesota, follows the region’s strong seasonal cycle. Surface temperatures in winter are at or just above freezing (around 32°F / 0°C) beneath ice cover. In spring the water typically warms through roughly 40–60°F (4–16°C) as ice melts and turnover occurs. By midsummer surface readings often reach about 68–75°F (20–24°C) in open water, with shallow bays sometimes a few degrees warmer. In autumn the lake cools again into the 45–60°F (7–16°C) range before refreezing. These are typical surface ranges; deeper water remains colder year-round and exact values vary with weather, depth, and sunlight.
Swimming is generally permitted where public access exists and no posted restrictions apply, but local access rules, private shorelines, or health advisories can limit recreation. People often swim in summer when surface temperatures are most comfortable, yet caution is warranted because cooler springs and falls carry hypothermia risks and winter ice makes swimming unsafe. Water-quality issues such as algal blooms, boat traffic, or underwater hazards can also prompt closures. Before entering the water it’s advisable to check local signage or authorities for any advisories and to be mindful of changing conditions.