Wallum Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Wallum Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Wallum Lake today is 19.3°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 |
|---|---|---|---|
| JUN 3 | 13.8°C | 17.9°C | |
| JUN 4 | 13.9°C | 17.9°C | |
| JUN 5 | 15.5°C | 17.9°C | |
| JUN 6 | 16.2°C | 17.9°C | |
| JUN 7 | 18.7°C | 17.9°C | |
| JUN 8 | 18.8°C | 17.9°C | |
| JUN 10 | 19.3°C | 17.9°C | |
| JUN 11 | 17.9°C | 19.2°C | |
| JUN 12 | 17.9°C | 19.2°C | |
| JUN 13 | 17.9°C | 19.1°C | |
| JUN 14 | 17.9°C | 19.0°C | |
| JUN 15 | 17.9°C | 19.0°C | |
| JUN 16 | 17.9°C | 18.9°C | |
| JUN 17 | 17.9°C | 18.8°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 | 2°C | 5°C |
| February | 1°C | 4°C | 7°C |
| March | 1°C | 6°C | 10°C |
| April | 4°C | 8°C | 11°C |
| May | 10°C | 14°C | 18°C |
| June | 13°C | 18°C | 22°C |
| July | 20°C | 26°C | 32°C |
| August | 22°C | 25°C | 28°C |
| September | 20°C | 23°C | 25°C |
| October | 13°C | 17°C | 20°C |
| November | 4°C | 9°C | 13°C |
| December | 0°C | 2°C | 5°C |
Wallum Lake: Water Temperature by Location
Wallum Lake: Weather Forecast
June 9
June 10
June 11
June 12
June 13
Location & Local Information
Wallum Lake, a small freshwater lake on the Massachusetts–Rhode Island border, experiences pronounced seasonal shifts in water temperature typical of New England inland waters. In spring the surface usually warms from roughly 40–60°F (4–16°C) as ice melts and air temperatures rise. By summer, surface readings commonly reach about 65–80°F (18–27°C) on warm afternoons, making the upper water column most comfortable for swimming. Early fall sees cooling back toward roughly 50–65°F (10–18°C) as nights cool, and in winter the lake approaches freezing, with surface temperatures often near 32–40°F (0–4°C) and ice forming on sheltered bays. Deeper water remains cooler year-round, so thermal stratification can mean a noticeable drop in temperature a few feet below the surface during summer.
Swimming is typically possible in areas where public access and signs designate it as allowed, and many local visitors swim during the warmest weeks of summer when both temperature and conditions are favorable. However, whether swimming is recommended depends on local rules, water quality monitoring, boat traffic, underwater hazards, and the absence of lifeguards; cold spring and fall water, submerged vegetation, or thin winter ice make swimming unsafe outside of appropriate seasons and supervised locations. Always follow posted guidance and exercise caution.