St. Johns River — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in the St. Johns River, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in the St. Johns River today is 28.9°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. 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 2 | 27.6°C | 20.0°C | |
| SEP 3 | 29.6°C | 20.0°C | |
| SEP 4 | 29.5°C | 20.0°C | |
| SEP 5 | 29.1°C | 20.0°C | |
| SEP 6 | 29.1°C | 20.0°C | |
| SEP 7 | 29.1°C | 20.0°C | |
| SEP 8 | 29.0°C | 20.0°C | |
| SEP 9 | 28.9°C | 20.0°C | |
| SEP 10 | 20.0°C | 28.5°C | |
| SEP 11 | 20.0°C | 28.0°C | |
| SEP 12 | 20.0°C | 27.6°C | |
| SEP 13 | 20.0°C | 27.1°C | |
| SEP 14 | 20.0°C | 26.7°C | |
| SEP 15 | 20.0°C | 26.2°C | |
| SEP 16 | 20.0°C | 25.8°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 | 19°C | 23°C | 26°C |
| February | 3°C | 14°C | 25°C |
| March | 3°C | 16°C | 28°C |
| April | 5°C | 17°C | 28°C |
| May | 8°C | 20°C | 31°C |
| June | 14°C | 23°C | 32°C |
| July | 17°C | 23°C | 28°C |
| August | 17°C | 24°C | 30°C |
| September | 11°C | 20°C | 29°C |
| October | 8°C | 18°C | 28°C |
| November | 3°C | 15°C | 26°C |
| December | 16°C | 21°C | 25°C |
St. Johns River: Water Temperature by Location
St. Johns River: Weather Forecast
September 10
September 11
September 12
September 13
September 14
Location & Local Information
Source St. Johns Marsh
• location near Vero Beach, Indian River County, Florida
• elevation 30 ft (9.1 m)
Mouth Atlantic Ocean
• location Jacksonville, Duval County, Florida
Length 310 mi (500 km)
The St. Johns River, one of the longest rivers in Florida, provides a mix of warm and mild waters ideal for swimming, especially during the summer months. Water temperatures in the river can range from 70°F to 80°F (21°C to 27°C) during the warmer season, making it a comfortable spot for swimming and other water activities. Even in winter, the water typically remains relatively mild, generally staying above 60°F (15°C), though it can feel cooler due to the region's occasional cold fronts.
Swimming in the St. Johns River is popular in various areas, particularly around the town of Sanford, as well as in smaller, more serene spots along the river. The river's calm currents, especially in its upper reaches, make it suitable for swimming. However, as with any natural body of water, caution is necessary due to the presence of wildlife like alligators and the occasional strong current in certain areas. Overall, the St. Johns River offers a great setting for a refreshing swim, especially during the hot Florida summer, while also allowing swimmers to enjoy the peaceful surroundings and natural beauty of the river.