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St. Johns River
St. Johns River Current Water Temperature and Forecast
On this page, you will find comprehensive information about the water temperature in St. Johns River, including current readings, historical data and trends, monthly averages, as well as weather forecasts and upcoming temperature predictions. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.
Current Water Temperature in St. Johns River
76°F
TODAY
76°F
YESTERDAY
76°F
A WEEK AGO
As of today, the minimum water temperature in the St. Johns River ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.
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.
Analysis, Historical Data, and Forecast of Water Temperature
Water Temperature Chart for St. Johns River Over the Last 30 Days
Today the water temperature in St. Johns River is higher than the same day in previous years. The water temperature range here in March is from 37°F to 82°F. The water temperature is trending upward, and it has increased both over the past 30 days and the past week.
The forecasted water temperature values for St. Johns River are presented in the table below.
The actual water temperature values near the shore may differ by a few degrees from the stated values. For the development of the forecast, we use our own mathematical model that takes into account the current water temperature changes, historical data, and key weather trends, including wind strength and direction, and air temperature in each specific region.
Daily Water Temperature Chart
| Date | Current | Average | Forecast |
|---|---|---|---|
| Mar 23 | 76°F | 60°F | |
| Mar 24 | 74°F | 60°F | |
| Mar 25 | 74°F | 60°F | |
| Mar 26 | 74°F | 60°F | |
| Mar 27 | 74°F | 60°F | |
| Mar 28 | 76°F | 60°F | |
| Mar 29 | 76°F | 60°F | |
| Mar 31 | 76°F | 60°F | |
| Apr 1 | 50°F | 75°F | |
| Apr 2 | 50°F | 73°F | |
| Apr 3 | 50°F | 72°F | |
| Apr 4 | 50°F | 70°F | |
| Apr 5 | 50°F | 69°F | |
| Apr 6 | 50°F | 68°F | |
| Apr 7 | 50°F | 67°F | |
| Apr 8 | 50°F | 65°F |
Water Temperature Ranges in St. Johns River by Month
January
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 56°F | 75°F |
February
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 56°F | 75°F |
March
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 60°F | 82°F |
April
| Minimum | Average | Maximum |
|---|---|---|
| 41°F | 50°F | 61°F |
May
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 56°F | 70°F |
June
| Minimum | Average | Maximum |
|---|---|---|
| 57°F | 65°F | 72°F |
July
| Minimum | Average | Maximum |
|---|---|---|
| 63°F | 68°F | 75°F |
August
| Minimum | Average | Maximum |
|---|---|---|
| 63°F | 71°F | 73°F |
September
| Minimum | Average | Maximum |
|---|---|---|
| 52°F | 64°F | 66°F |
October
| Minimum | Average | Maximum |
|---|---|---|
| 46°F | 56°F | 61°F |
November
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 47°F | 61°F |
December
| Minimum | Average | Maximum |
|---|---|---|
| 37°F | 40°F | 46°F |
Monthly Water Temperature Histogram for St. Johns River
Water Temperature in Cities and Towns on St. Johns River
St. Johns River Weather
APRIL 1
68°F / 91°F
overcastrain: 17% | wind: 10 mph
APRIL 2
68°F / 91°F
overcastrain: 17% | wind: 15 mph
APRIL 3
68°F / 90°F
mainly clearrain: 5% | wind: 13 mph
APRIL 4
66°F / 91°F
clear skyrain: 4% | wind: 12 mph
APRIL 5
64°F / 91°F
clear skyrain: 1% | wind: 12 mph
Water Temperature in St. Johns River: General Trends and Swimming Opportunities
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.
Geographical Location of St. Johns River
Frequently Asked Questions About St. Johns River and its Water Temperatures
What is the current water temperature in St. Johns River?
The water temperature today in St. Johns River ranges from 68°F (20.2°C) to 76°F (24.5°C).
What is the water temperature in St. Johns River during the summer months?
The average water temperature in St. Johns River during the summer months is typically between 65°F to 71°F (19°C to 21°C), and it can reach up to 75°F (24°C) at its warmest. However, in some years, the temperature may exceed this range.
What is the water temperature in St. Johns River in May?
The average water temperature in St. Johns River in May ranges from 46°F to 70°F (8°C to 21°C).
What is the water temperature in St. Johns River in September?
The average water temperature in St. Johns River in September is typically between 52°F to 66°F (11°C to 19°C).
Where does St. Johns River flow?
St. Johns River flows through United States (Florida).
Is it possible to swim in the St. Johns River?
Yes, it is possible to swim in the St. Johns River. However, due to potential safety concerns like alligators or water quality, it is not commonly recommended.
What major cities are located on St. Johns River?
Cities along the course of St. Johns River include Deltona (Florida), Jacksonville (Florida), Sanford (Florida).