St Johns River

St Johns River

Jacksonvill, Duvall County, FL
294mi²
ft
Directions
Lake Information

The St. Johns River is a major river in the U.S. state of Florida and is the longest river in the state, spanning a distance of 310 miles. It is a significant river for both commercial and recreational purposes and is an important natural resource in the region. The river flows north and winds through or borders twelve counties, covering a total area of 188,292 acres. The river's source is located in Indian River County, where it originates from the marshes and swamps of the St. Johns Marsh Wildlife Management Area. The river then flows north, passing through Lake Monroe, which is a large lake located near the city of Sanford. From there, the river winds its way through the state, passing through several major cities, including Jacksonville, the largest city in Florida, and Palatka. The St. Johns River is known for its diverse ecosystem, which includes a variety of plant and animal species. The river is home to over 200 species of fish, including popular game fish such as largemouth bass, bluegill, and catfish. The river is also home to several species of turtles, alligators, and manatees, which can often be seen swimming in the river's waters. The river's banks are lined with mangroves and other vegetation, providing a habitat for many bird species such as herons, egrets, and ibises. The St. Johns River is also a vital commercial resource for the state of Florida. The river is navigable for much of its length, and large cargo ships can travel upriver as far as Jacksonville, where the river empties into the Atlantic Ocean. The river is also used for recreational activities such as boating, fishing, and swimming. There are many public boat ramps and fishing piers along the river's banks, making it accessible to both locals and tourists. In conclusion, the St. Johns River is a vital natural resource in the state of Florida, serving as a significant commercial and recreational resource. With its diverse ecosystem and abundant wildlife, the river is a popular destination for outdoor enthusiasts, and its navigability makes it an essential transportation route for the region. As one of the longest rivers in the state, the St. Johns River continues to play a vital role in the state's economy and environment.

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Current Conditions

81°F°
Feels like 80°F°
PartlyCloudy
Today's High
93°F°
Today's Low
70°F°

Water Temperature

78°F
Updated: (May 12)
Sign in to contribute temps.

Current water temperature for St Johns River is 78°F.

Current Snapshot

Wind8 mph ESE (Gust 13 mph)
Pressure
29.90 inHg
Visibility14 mi
Humidity68%
Cloud Cover45%

Forecast: Thursday, May 15

Day 1 of 9

Hourly Insights

7 AM
70°F°
10 AM
78°F°
1 PM
88°F°
4 PM
93°F°
7 PM
89°F°

Temperature

High
93°F°
Low
70°F°

Precipitation

Chance0%
Amount0.00"
Typeclear

Wind

6mph
Avg Speed
Gusts up to
18mph
CalmModerateStrong
Max Speed9 mph

Sun, Moon & UV

Sunrise10:32 AM
Sunset12:14 AM
Moon PhasewaningGibbous
Max UV Index10 (Very High)

Solunar Fishing Forecast

Action Rating
2/5

Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)

Major Times (Best)

6:54 AM - 9:24 AM

9:30 PM - 12:00 AM

Minor Times (Good)

4:00 AM - 4:00 AM

11:51 AM - 1:21 PM

Outlook for Thursday at St Johns River

Expect temperatures ranging from 70°F to 93°F. Skies look mostly clear with little chance of precipitation. Winds will be averaging 6 mph, with potential gusts reaching up to 18 mph. The maximum UV index will be 10 (Very High), so plan sun protection accordingly. For anglers, today's fishing action is rated 2/5 (Todays action is rated a 2 (scale is 0 thru 5, 5 is the best)). Look for the best bite times during the major periods around 6:54 AM and 9:30 PM, or try the minor windows near 4:00 AM and 11:51 AM for potential early morning or evening action. Check back for the latest conditions and forecasts for St Johns River.

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May 14th 2025

Lake Information

Elevation
N/A
Area
294 mi²
Coordinates
30.290, -81.675

Weather Forecast

Thursday

93°F
70°F

Friday

95°F
70°F

Saturday

96°F
70°F

Sunday

95°F
72°F

Monday

97°F
71°F

Tuesday

97°F
74°F

Wednesday

94°F
73°F

Thursday

89°F
75°F

Friday

82°F
67°F
Thursday - 5/15/2025
93°F
70°F
12am
76°F
78°F
29.96 hPa
5 mph
SSW
G: 11 mph
2am
73°F
78°F
29.94 hPa
4 mph
SW
G: 8 mph
4am
71°F
78°F
29.93 hPa
6 mph
SW
G: 10 mph
6am
70°F
78°F
29.95 hPa
6 mph
WSW
G: 12 mph
8am
72°F
78°F
29.98 hPa
4 mph
W
G: 11 mph
10am
78°F
78°F
29.99 hPa
4 mph
SW
G: 8 mph
12pm
85°F
78°F
29.99 hPa
6 mph
SW
G: 11 mph
2pm
90°F
78°F
29.97 hPa
7 mph
SW
G: 14 mph
4pm
93°F
78°F
29.93 hPa
8 mph
WSW
G: 16 mph
6pm
92°F
78°F
29.91 hPa
9 mph
WSW
G: 16 mph
8pm
86°F
78°F
29.92 hPa
8 mph
WSW
G: 17 mph
10pm
80°F
78°F
29.96 hPa
8 mph
WSW
G: 18 mph

Water Temperature History

Trends for St Johns River

Current Temp

Sign in to view

Latest recorded surface temperature.

Lowest in Period

49°F

On Jan 19

Coldest point in the Last 12 Months.

Average in Period

69°F

Typical temp during the Last 12 Months.

Temperature Trend: Last 12 Months

Surface temperature over the selected period.

Key Observations (Last 12 Months)

  • Warmest avg: July (85°F).
  • Coolest avg: January (54°F).
  • Rapid warming often occurs: March → April (+11°F).
  • Sharpest cooling trend: November → December (-10°F).

Weather Forecast

Wind speed and pressure trends

Hourly Wind Forecast

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm05101520

Wind Direction

204°

Pressure

1014 mb

Cloud Cover

14%

Visibility

12 miles

Daily Pressure Forecast

ThuFriSatSunMonTueWedThuFri0.008.8617.7226.5835.44
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Frequently Asked Questions About St Johns River

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