Swan Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Swan Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Swan Lake today is 18.5°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 | 21.1°C | |
| SEP 15 | 18.8°C | 21.1°C | |
| SEP 16 | 18.8°C | 21.1°C | |
| SEP 17 | 19.2°C | 21.1°C | |
| SEP 18 | 19.2°C | 21.1°C | |
| SEP 19 | 18.7°C | 21.1°C | |
| SEP 20 | 18.4°C | 21.1°C | |
| SEP 21 | 18.5°C | 21.1°C | |
| SEP 22 | 21.1°C | 18.6°C | |
| SEP 23 | 21.1°C | 18.8°C | |
| SEP 24 | 21.1°C | 18.9°C | |
| SEP 25 | 21.1°C | 19.0°C | |
| SEP 26 | 21.1°C | 19.2°C | |
| SEP 27 | 21.1°C | 19.3°C | |
| SEP 28 | 21.1°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 | 1°C | 4°C |
| February | 0°C | 2°C | 4°C |
| March | 0°C | 2°C | 4°C |
| April | 1°C | 4°C | 6°C |
| May | 5°C | 9°C | 14°C |
| June | 10°C | 15°C | 19°C |
| July | 17°C | 21°C | 26°C |
| August | 20°C | 24°C | 27°C |
| September | 19°C | 21°C | 24°C |
| October | 9°C | 14°C | 19°C |
| November | 3°C | 8°C | 13°C |
| December | 0°C | 2°C | 5°C |
Swan Lake: Water Temperature by Location
Swan Lake: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Swan Lake in Maine typically follows the seasonal pattern of northern temperate lakes, with surface water temperatures that swing markedly through the year. In winter the lake commonly sits at or just above freezing, around 32°F (0°C) under ice cover. During spring it warms slowly, roughly 34–55°F (1–13°C) as melt and runoff continue to cool the surface. By summer, surface temperatures are most comfortable for recreation, often ranging from about 64–74°F (18–23°C) and occasionally reaching the mid-70s°F (24–26°C) on particularly warm spells; deeper water remains significantly colder year-round. In autumn the lake cools back into the 50s°F (10–15°C) as air temperatures drop and stratification breaks down.
Swimming at Swan Lake is generally permitted and commonly practiced because it is an inland recreational lake with shoreline access and designated launch or beach areas in some spots. Whether a specific site is suitable depends on local rules, property ownership, and current water-quality conditions; seasonal concerns include cold-shock risk early and late in the year, declining temperatures below comfortable levels outside mid-summer, and occasional algae or bacterial advisories that can temporarily restrict swimming. For safety and compliance, swimmers should observe posted notices and local health advisories before entering the water.