Water Temperature of the St. Johns River in Jacksonville, FL

Current Water Temperature

83.5°F

Measurement Time: Sunday, September 21, 2025, 3:12 PM EDT

Temperature Locations

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Local Points of Interest

Jacksonville University

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St. Johns River

Station Name: Jacksonville University
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 0 feet / 0 meters

Nearest Address:
2800 University Blvd N
Jacksonville, FL 32211
Duval County

GPS Coordinates: 30.354083, -81.61175

Nearby Water Temperatures

St. Johns River, Jacksonville, FL (3.9 mi)
St. Johns River, Jacksonville, FL (3.9 mi)
St. Johns River, Jacksonville, FL (3.9 mi)
St. Johns River, Jacksonville, FL (4.5 mi)
Pottsburg Creek, Jacksonville, FL (5.3 mi)
Dunn Creek, Jacksonville, FL (7.0 mi)
Broward River, Jacksonville, FL (7.0 mi)
St. Johns River, Jacksonville, FL (7.2 mi)
Clapboard Creek, Jacksonville, FL (8.4 mi)
Cedar River, Jacksonville, FL (9.1 mi)
Trout River, Jacksonville, FL (10.4 mi)
St. Johns River, Jacksonville, FL (11.4 mi)
St. Johns River, Jacksonville, FL (11.8 mi)
Ortega River, Jacksonville, FL (12.7 mi)
St. Johns River, Orange Park, FL (12.9 mi)

Weather for Jacksonville, Florida

Current Weather

86.5°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 57%
Feels Like: 92.6°F
Wind: NE 11.6 mph
Wind Gusts: 13.4 mph
Pressure: 30.05 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 5.9

Five Day Weather Forecast

Sunny
Sun
H: 88°F
L: 69°F
Overcast
Mon
H: 88°F
L: 75°F
Moderate rain
Tue
H: 89°F
L: 77°F
Sunny
Wed
H: 94°F
L: 77°F
Patchy rain nearby
Thu
H: 95°F
L: 76°F

Air Quality

AQI: 1 - Good
PM2.5: 9.44 μg/m3
PM10: 13.69 μg/m3
Carbon Monoxide: 327.45 μg/m3
Nitrogen Dioxide: 7.22 μg/m3
Sulphur Dioxide: 4.63 μg/m3
Ozone: 91 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 1:19 PM
Sunset: 7:24 PM
Daylight: 12 hrs 9 mins
Moonrise: 7:00 AM
Moon Transit: 1:13 PM
Moonset: 7:19 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
12:43 AM - 3:13 PM

Minor Periods

6:49 PM - 8:19 PM
6:30 AM - 8:00 AM

Action Rating: 3 out of 5

Rip Current Statement issued September 20 at 11:58PM EDT until September 23 at 8:00PM EDT by NWS Jacksonville FL

Effective: Sat September 20, 2025, 11:58 PM
Expires: Mon September 22, 2025, 6:00 AM

* WHAT...Dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...Through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water.

Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.


Rip Current Statement issued September 20 at 11:58PM EDT until September 23 at 8:00PM EDT by NWS Jacksonville FL

Effective: Sat September 20, 2025, 11:58 PM
Expires: Mon September 22, 2025, 6:00 AM

* WHAT...Dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...Through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water.

Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.


Rip Current Statement issued September 20 at 11:58PM EDT until September 23 at 8:00PM EDT by NWS Jacksonville FL

Effective: Sat September 20, 2025, 11:58 PM
Expires: Mon September 22, 2025, 6:00 AM

* WHAT...Dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...Through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water.

Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.


Rip Current Statement issued September 20 at 11:58PM EDT until September 23 at 8:00PM EDT by NWS Jacksonville FL

Effective: Sat September 20, 2025, 11:58 PM
Expires: Mon September 22, 2025, 6:00 AM

* WHAT...Dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...Through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water.

Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.


Rip Current Statement issued September 20 at 11:58PM EDT until September 23 at 8:00PM EDT by NWS Jacksonville FL

Effective: Sat September 20, 2025, 11:58 PM
Expires: Mon September 22, 2025, 6:00 AM

* WHAT...Dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...Through Tuesday evening. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water.

Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.
Sunday, September 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 78.4°F
Average Humidity: 78%
Chance of Rain: 0%
Wind: 11.9 mph
UV Index: 1.9

Air Quality

AQI: 1 - Good
PM2.5: 13.17 μg/m3
PM10: 18.34 μg/m3
Carbon Monoxide: 341.51 μg/m3
Nitrogen Dioxide: 7.92 μg/m3
Sulphur Dioxide: 5.48 μg/m3
Ozone: 94.96 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 1:19 PM
Sunset: 7:24 PM
Daylight: 12 hrs 9 mins
Moonrise: 7:00 AM
Moon Transit: 1:13 PM
Moonset: 7:19 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
12:43 AM - 3:13 PM

Minor Periods

6:49 PM - 8:19 PM
6:30 AM - 8:00 AM

Action Rating: 3 out of 5

Monday, September 22, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 80.3°F
Average Humidity: 77%
Chance of Rain: 0%
Wind: 10.1 mph
UV Index: 1.5

Air Quality

AQI: 1 - Good
PM2.5: 7.29 μg/m3
PM10: 10.43 μg/m3
Carbon Monoxide: 296.67 μg/m3
Nitrogen Dioxide: 6.8 μg/m3
Sulphur Dioxide: 4.87 μg/m3
Ozone: 83.56 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 1:19 PM
Sunset: 7:22 PM
Daylight: 12 hrs 8 mins
Moonrise: 7:55 AM
Moon Transit: 1:53 PM
Moonset: 7:46 PM
Moon Phase: New
Moon Illumination: 2.9%

Best Times for Fishing or Hunting

Major Periods

2:12 AM - 4:42 AM
1:23 PM - 3:53 PM

Minor Periods

7:16 PM - 8:46 PM
7:25 AM - 8:55 AM

Action Rating: 5 out of 5

Tuesday, September 23, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 81.9°F
Average Humidity: 77%
Chance of Rain: 89%
Wind: 8.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 9.1 μg/m3
PM10: 12.02 μg/m3
Carbon Monoxide: 298.66 μg/m3
Nitrogen Dioxide: 11.57 μg/m3
Sulphur Dioxide: 8.07 μg/m3
Ozone: 61.28 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 1:18 PM
Sunset: 7:21 PM
Daylight: 12 hrs 6 mins
Moonrise: 8:50 AM
Moon Transit: 2:34 PM
Moonset: 8:13 PM
Moon Phase: New
Moon Illumination: 0.6%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
2:04 PM - 4:34 PM

Minor Periods

7:43 PM - 9:13 PM
8:20 AM - 9:50 AM

Action Rating: 4 out of 5

Wednesday, September 24, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 83.3°F
Average Humidity: 72%
Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 7

Air Quality

AQI: 2 - Moderate
PM2.5: 17.46 μg/m3
PM10: 19.89 μg/m3
Carbon Monoxide: 297.04 μg/m3
Nitrogen Dioxide: 16.35 μg/m3
Sulphur Dioxide: 12.2 μg/m3
Ozone: 69.12 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 1:18 PM
Sunset: 7:20 PM
Daylight: 12 hrs 4 mins
Moonrise: 9:46 AM
Moon Transit: 3:16 PM
Moonset: 8:42 PM
Moon Phase: New
Moon Illumination: 3.6%

Best Times for Fishing or Hunting

Major Periods

3:34 AM - 6:04 AM
2:46 PM - 5:16 PM

Minor Periods

8:12 PM - 9:42 PM
9:16 AM - 10:46 AM

Action Rating: 3 out of 5

Thursday, September 25, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 82.4°F
Average Humidity: 68%
Chance of Rain: 89%
Wind: 8.5 mph
UV Index: 6

Air Quality

AQI: 1 - Good
PM2.5: 11.84 μg/m3
PM10: 13.92 μg/m3
Carbon Monoxide: 268.11 μg/m3
Nitrogen Dioxide: 13.75 μg/m3
Sulphur Dioxide: 6.59 μg/m3
Ozone: 53.69 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 1:17 PM
Sunset: 7:19 PM
Daylight: 12 hrs 2 mins
Moonrise: 10:43 AM
Moon Transit: 4:00 PM
Moonset: 9:14 PM
Moon Phase: Waxing Crescent
Moon Illumination: 8.9%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
3:30 PM - 6:00 PM

Minor Periods

8:44 PM - 10:14 PM
10:13 AM - 11:43 AM

Action Rating: 3 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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