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

Current Water Temperature

87.8°F

Measurement Time: Friday, July 25, 2025, 6:30 PM EDT

Temperature Locations

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Local Points of Interest

Riverfront Park; Marco Lake

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St. Johns River

Station Name: ST JOHNS RIVER BL MARCO LK AT JACKSONVILLE, FL
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 0 feet / 0 meters

Nearest Address:
1799 River Rd
Jacksonville, FL 32207
Duval County

GPS Coordinates: 30.30478056, -81.6601

Nearby Water Temperatures

St. Johns River, Jacksonville, FL (1.3 mi)
St. Johns River, Jacksonville, FL (3.7 mi)
St. Johns River, Jacksonville, FL (4.5 mi)
Cedar River, Jacksonville, FL (5.0 mi)
Pottsburg Creek, Jacksonville, FL (5.5 mi)
St. Johns River, Jacksonville, FL (7.9 mi)
St. Johns River, Jacksonville, FL (8.3 mi)
St. Johns River, Jacksonville, FL (8.3 mi)
Ortega River, Jacksonville, FL (8.3 mi)
St. Johns River, Orange Park, FL (8.7 mi)
Broward River, Jacksonville, FL (9.6 mi)
Trout River, Jacksonville, FL (10.8 mi)
Dunn Creek, Jacksonville, FL (11.0 mi)
Julington Creek, Jacksonville, FL (12.4 mi)
Clapboard Creek, Jacksonville, FL (12.9 mi)

Weather for Jacksonville, Florida

Current Weather

84°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 80%
Feels Like: 95.3°F
Wind: SE 5.1 mph
Wind Gusts: 8.2 mph
Pressure: 30.12 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Fri
H: 96°F
L: 80°F
Partly Cloudy
Sat
H: 98°F
L: 81°F
Sunny
Sun
H: 104°F
L: 84°F
Sunny
Mon
H: 102°F
L: 86°F
Moderate rain
Tue
H: 97°F
L: 77°F

Air Quality

AQI: 2 - Moderate
PM2.5: 24.24 μg/m3
PM10: 44.4 μg/m3
Carbon Monoxide: 344.1 μg/m3
Nitrogen Dioxide: 22.57 μg/m3
Sulphur Dioxide: 4.63 μg/m3
Ozone: 32 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 1:33 PM
Sunset: 8:25 PM
Daylight: 13 hrs 44 mins
Moonrise: 7:22 AM
Moon Transit: 2:26 PM
Moonset: 9:22 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

2:39 AM - 5:09 AM
1:56 PM - 4:26 PM

Minor Periods

8:52 PM - 10:22 PM
6:52 AM - 8:22 AM

Action Rating: 5 out of 5

Heat Advisory issued July 25 at 1:07PM EDT until July 26 at 7:00PM EDT by NWS Jacksonville FL

Effective: Fri July 25, 2025, 1:07 PM
Expires: Sat July 26, 2025, 5:00 AM

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of northeast and northern Florida and southeast Georgia. * WHEN...From 11 AM to 7 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.


Heat Advisory issued July 25 at 1:07PM EDT until July 26 at 7:00PM EDT by NWS Jacksonville FL

Effective: Fri July 25, 2025, 1:07 PM
Expires: Sat July 26, 2025, 5:00 AM

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of northeast and northern Florida and southeast Georgia. * WHEN...From 11 AM to 7 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.


Heat Advisory issued July 25 at 1:07PM EDT until July 26 at 7:00PM EDT by NWS Jacksonville FL

Effective: Fri July 25, 2025, 1:07 PM
Expires: Sat July 26, 2025, 5:00 AM

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of northeast and northern Florida and southeast Georgia. * WHEN...From 11 AM to 7 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.


Heat Advisory issued July 25 at 1:07PM EDT until July 26 at 7:00PM EDT by NWS Jacksonville FL

Effective: Fri July 25, 2025, 1:07 PM
Expires: Sat July 26, 2025, 5:00 AM

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of northeast and northern Florida and southeast Georgia. * WHEN...From 11 AM to 7 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.


Heat Advisory issued July 25 at 1:07PM EDT until July 26 at 7:00PM EDT by NWS Jacksonville FL

Effective: Fri July 25, 2025, 1:07 PM
Expires: Sat July 26, 2025, 5:00 AM

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of northeast and northern Florida and southeast Georgia. * WHEN...From 11 AM to 7 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Friday, July 25, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 86.5°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 9.8 mph
UV Index: 2.5

Air Quality

AQI: 2 - Moderate
PM2.5: 19.98 μg/m3
PM10: 37.97 μg/m3
Carbon Monoxide: 248.57 μg/m3
Nitrogen Dioxide: 10.72 μg/m3
Sulphur Dioxide: 7.34 μg/m3
Ozone: 66.36 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 1:33 PM
Sunset: 8:25 PM
Daylight: 13 hrs 44 mins
Moonrise: 7:22 AM
Moon Transit: 2:26 PM
Moonset: 9:22 PM
Moon Phase: New
Moon Illumination: 3.1%

Best Times for Fishing or Hunting

Major Periods

2:39 AM - 5:09 AM
1:56 PM - 4:26 PM

Minor Periods

8:52 PM - 10:22 PM
6:52 AM - 8:22 AM

Action Rating: 5 out of 5

Saturday, July 26, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 88.9°F
Average Humidity: 71%
Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 2.6

Air Quality

AQI: 2 - Moderate
PM2.5: 28.48 μg/m3
PM10: 46.66 μg/m3
Carbon Monoxide: 320.94 μg/m3
Nitrogen Dioxide: 15.8 μg/m3
Sulphur Dioxide: 8.58 μg/m3
Ozone: 97.6 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:33 PM
Sunset: 8:25 PM
Daylight: 13 hrs 43 mins
Moonrise: 8:27 AM
Moon Transit: 3:15 PM
Moonset: 9:55 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
2:45 PM - 5:15 PM

Minor Periods

9:25 PM - 10:55 PM
7:57 AM - 9:27 AM

Action Rating: 3 out of 5

Sunday, July 27, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 92.6°F
Average Humidity: 60%
Chance of Rain: 0%
Wind: 11.2 mph
UV Index: 2.8

Air Quality

AQI: 2 - Moderate
PM2.5: 24.88 μg/m3
PM10: 34.4 μg/m3
Carbon Monoxide: 295.85 μg/m3
Nitrogen Dioxide: 13.93 μg/m3
Sulphur Dioxide: 6.44 μg/m3
Ozone: 107.48 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 1:33 PM
Sunset: 8:24 PM
Daylight: 13 hrs 41 mins
Moonrise: 9:27 AM
Moon Transit: 4:00 PM
Moonset: 10:24 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

4:16 AM - 6:46 AM
3:30 PM - 6:00 PM

Minor Periods

9:54 PM - 11:24 PM
8:57 AM - 10:27 AM

Action Rating: 4 out of 5

Monday, July 28, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 93°F
Average Humidity: 55%
Chance of Rain: 0%
Wind: 12.1 mph
UV Index: 2.6

Air Quality

AQI: 2 - Moderate
PM2.5: 19.77 μg/m3
PM10: 22.24 μg/m3
Carbon Monoxide: 307.69 μg/m3
Nitrogen Dioxide: 12.71 μg/m3
Sulphur Dioxide: 6.12 μg/m3
Ozone: 126.08 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 1:33 PM
Sunset: 8:23 PM
Daylight: 13 hrs 40 mins
Moonrise: 10:25 AM
Moon Transit: 4:41 PM
Moonset: 10:51 PM
Moon Phase: Waxing Crescent
Moon Illumination: 9.3%

Best Times for Fishing or Hunting

Major Periods

4:59 AM - 7:29 AM
4:11 PM - 6:41 PM

Minor Periods

10:21 PM - 11:51 PM
9:55 AM - 11:25 AM

Action Rating: 2 out of 5

Tuesday, July 29, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 85.9°F
Average Humidity: 62%
Chance of Rain: 89%
Wind: 10.5 mph
UV Index: 1.9

Air Quality

AQI: 2 - Moderate
PM2.5: 22.17 μg/m3
PM10: 23.96 μg/m3
Carbon Monoxide: 424.5 μg/m3
Nitrogen Dioxide: 16.79 μg/m3
Sulphur Dioxide: 6.32 μg/m3
Ozone: 99.77 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:33 PM
Sunset: 8:23 PM
Daylight: 13 hrs 39 mins
Moonrise: 11:20 AM
Moon Transit: 5:22 PM
Moonset: 11:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

5:40 AM - 8:10 AM
4:52 PM - 7:22 PM

Minor Periods

12:00 AM - 12:00 AM
10:50 AM - 12:20 AM

Action Rating: 2 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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