Lake Lanier — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Lanier, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Lanier today is 18.1°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 |
|---|---|---|---|
| OCT 26 | 20.4°C | 21.0°C | |
| OCT 27 | 20.1°C | 21.0°C | |
| OCT 28 | 19.6°C | 21.0°C | |
| OCT 29 | 19.3°C | 21.0°C | |
| OCT 30 | 19.1°C | 21.0°C | |
| OCT 31 | 18.8°C | 21.0°C | |
| NOV 1 | 19.0°C | 15.3°C | |
| NOV 2 | 18.4°C | 15.3°C | |
| NOV 3 | 15.3°C | 18.0°C | |
| NOV 4 | 15.3°C | 17.8°C | |
| NOV 5 | 15.3°C | 17.7°C | |
| NOV 6 | 15.3°C | 17.5°C | |
| NOV 7 | 15.3°C | 17.4°C | |
| NOV 8 | 15.3°C | 17.3°C | |
| NOV 9 | 15.3°C | 17.1°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 | 5°C | 9°C | 12°C |
| February | 4°C | 8°C | 12°C |
| March | 6°C | 12°C | 17°C |
| April | 13°C | 17°C | 20°C |
| May | 16°C | 21°C | 25°C |
| June | 17°C | 23°C | 29°C |
| July | 20°C | 24°C | 27°C |
| August | 20°C | 25°C | 29°C |
| September | 20°C | 25°C | 29°C |
| October | 16°C | 21°C | 26°C |
| November | 10°C | 15°C | 20°C |
| December | 7°C | 11°C | 14°C |
Lake Lanier: Water Temperature by Location
Lake Lanier: Weather Forecast
November 3
November 4
November 5
November 6
November 7
Location & Local Information
Lake Lanier, a large reservoir in northern Georgia, experiences notable seasonal swings in surface water temperature. In spring the surface commonly ranges from about 50–70°F (10–21°C) as air temperatures warm, while summer brings the warmest conditions with typical surface readings around 75–85°F (24–29°C), sometimes higher in shallow coves on hot afternoons. Fall temperatures generally cool to roughly 55–75°F (13–24°C) as the lake releases summer heat, and winter surface temperatures often fall into the 40–55°F (4–13°C) range. These figures vary by depth, location, time of day and recent weather; deeper water stays colder year-round and inflows from tributaries can create cooler pockets.
Swimming at Lake Lanier is allowed in many designated beach and park areas, and those sites are maintained for recreational use when conditions are safe. Public swim areas are subject to park rules and water-quality advisories, so postings or temporary closures occur if bacteria levels, algae blooms or safety concerns arise. Comfort and safety are driven by temperature: summer conditions are most pleasant for swimming, while cooler spring and fall waters may feel brisk, and winter swimming carries risks of cold shock and hypothermia. Visitors should heed local signage, use life jackets where appropriate and be mindful of currents, boat traffic and changing conditions.