Lac Memphrémagog — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lac Memphrémagog, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lac Memphrémagog 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 | 18.6°C | 20.5°C | |
| SEP 15 | 19.0°C | 20.5°C | |
| SEP 16 | 18.8°C | 20.5°C | |
| SEP 17 | 18.6°C | 20.5°C | |
| SEP 18 | 18.5°C | 20.5°C | |
| SEP 19 | 18.7°C | 20.5°C | |
| SEP 20 | 19.1°C | 20.5°C | |
| SEP 21 | 18.3°C | 20.5°C | |
| SEP 22 | 20.5°C | 18.4°C | |
| SEP 23 | 20.5°C | 18.5°C | |
| SEP 24 | 20.5°C | 18.6°C | |
| SEP 25 | 20.5°C | 18.7°C | |
| SEP 26 | 20.5°C | 18.9°C | |
| SEP 27 | 20.5°C | 19.0°C | |
| SEP 28 | 20.5°C | 19.1°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 | 0°C | 3°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 2°C | 4°C |
| April | 0°C | 4°C | 8°C |
| May | 3°C | 9°C | 15°C |
| June | 10°C | 15°C | 20°C |
| July | 17°C | 22°C | 27°C |
| August | 19°C | 21°C | 24°C |
| September | 16°C | 21°C | 25°C |
| October | 8°C | 12°C | 16°C |
| November | 2°C | 6°C | 10°C |
| December | 1°C | 4°C | 6°C |
Lac Memphrémagog: Water Temperature by Location
Lac Memphrémagog: Weather Forecast
September 22
September 23
September 24
September 25
Location & Local Information
Lac Memphrémagog is a long, glacial lake that straddles the border between Quebec, Canada, and Vermont, USA — it does not reach New York. Surface water temperatures vary markedly with the seasons. In spring (April–May) the lake is chilly, often in the 40s–50s °F (5–15 °C) as snowmelt and cool air keep temperatures low. By early summer (June) surface readings commonly rise into the upper 50s to mid 60s °F (15–19 °C), and peak summer (July–August) averages are typically in the upper 60s to mid 70s °F (20–24 °C) on warm afternoons. In September temperatures drop back into the 50s–60s °F (10–20 °C), and in winter the lake can be close to freezing with ice cover in some years, keeping surface water near 32–39 °F (0–4 °C).
Swimming in the Vermont and Quebec portions is generally allowed and popular during the warmer months because of public beaches and ongoing water-quality monitoring. Local authorities may close specific sites if tests show contamination or harmful algal blooms, and cold-water immersion remains a hazard even in summer due to depth and sudden thermoclines. Winter swimming is uncommon because of ice and dangerously low temperatures. As always, swimmers should follow posted advisories, lifeguard notices, and basic cold-water safety precautions.