Lake Nockamixon — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Nockamixon, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Nockamixon today is 82°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays. 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 |
|---|---|---|---|
| JUL 11 | 75°F | 80°F | |
| JUL 12 | 75°F | 80°F | |
| JUL 13 | 75°F | 80°F | |
| JUL 14 | 71°F | 80°F | |
| JUL 15 | 80°F | 80°F | |
| JUL 16 | 81°F | 80°F | |
| JUL 17 | 83°F | 80°F | |
| JUL 18 | 83°F | 80°F | |
| JUL 19 | 80°F | 82°F | |
| JUL 20 | 80°F | 82°F | |
| JUL 21 | 80°F | 82°F | |
| JUL 22 | 80°F | 81°F | |
| JUL 23 | 80°F | 81°F | |
| JUL 24 | 80°F | 81°F | |
| JUL 25 | 80°F | 81°F |
* 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 | 32°F | 39°F | 45°F |
| February | 32°F | 39°F | 45°F |
| March | 34°F | 42°F | 50°F |
| April | 48°F | 58°F | 68°F |
| May | 57°F | 64°F | 72°F |
| June | 61°F | 73°F | 86°F |
| July | 68°F | 80°F | 91°F |
| August | 72°F | 80°F | 88°F |
| September | 68°F | 73°F | 77°F |
| October | 54°F | 62°F | 70°F |
| November | 41°F | 48°F | 55°F |
| December | 34°F | 40°F | 45°F |
Lake Nockamixon: Water Temperature by Location
Lake Nockamixon: Weather Forecast
July 19
July 20
July 21
July 22
July 23
Location & Local Information
Lake Nockamixon’s surface water temperatures follow typical mid-Atlantic seasonal patterns. In winter (December–February) the lake often hovers around freezing to the low 40s °F (0–4 °C) and can form ice during prolonged cold spells. Spring (March–May) brings a steady rise, with surface readings generally in the 40s to low 60s °F (4–16 °C). By summer (June–August) the lake is warmest, commonly ranging from the upper 60s into the upper 70s °F (20–27 °C), though shallow bays may warm faster. In autumn (September–November) temperatures cool back through the 50s to upper 60s °F (10–20 °C) as air temperatures fall and mixing increases.
Swimming in Lake Nockamixon is not permitted under park regulations, so there are no lifeguarded beaches or official swimming areas. The restriction reflects a combination of safety and management concerns: boat traffic and personal watercraft use, variable undersea conditions and drop-offs, and the absence of staffed supervision increase risk to bathers. Visitors are instead directed to recreational boating, fishing, and shoreline picnicking where allowed. Those seeking open-water immersion should verify local rules and water conditions at alternative designated swimming sites with lifeguards and regular monitoring.