Water Temperature of the St. Johns River in Jacksonville, FL
Current Water Temperature
Measurement Time: Wednesday, May 6, 2026, 1:30 AM EDT
Temperature Locations
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Local Points of Interest
Riverfront Park; Marco LakeStation Name: ST JOHNS RIVER BL MARCO LK AT JACKSONVILLE, FL
Data Source: Water Data - usgc.gov
Elevation Above Sea Level: 0 feet
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 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 mi)
Julington Creek, Jacksonville, FL (12.4 mi)
Clapboard Creek, Jacksonville, FL (12.9 mi)
Weather for Jacksonville, Florida
Current Weather

Five Day Weather Forecast

Wed
H: 94°F
L: 67°F

Thu
H: 99°F
L: 70°F

Fri
H: 85°F
L: 70°F

Sat
H: 82°F
L: 69°F

Sun
H: 94°F
L: 69°F
Air Quality
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 4.25 μg/m3
Ozone: 104 μg/m3
Astronomical
Sun Transit: 1:23 PM
Sunset: 8:08 PM
Daylight: 13 hrs 29 mins
Moon Transit: 5:00 AM
Moonset: 10:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
4:30 AM - 7:00 AM6:05 PM - 8:35 PM
Minor Periods
9:30 AM - 11:00 AM12:00 AM - 12:00 AM
Action Rating: 4 out of 5
Fire Weather Watch issued May 6 at 12:22AM EDT until May 7 at 8:00PM EDT by NWS Jacksonville FL
Effective: Wed May 6, 2026, 12:22 AM
Expires: Wed May 6, 2026, 3:00 PM
...FIRE WEATHER WATCH ON THURSDAY AFTERNOON AND EARLY EVENING FOR PORTIONS OF NORTHEAST AND NORTH CENTRAL FL... The National Weather Service in Jacksonville has issued a Fire Weather Watch for gusty winds and near critically low humidity values, which is in effect from Thursday afternoon through Thursday evening. * AFFECTED AREA...In Florida, Inland Nassau, Inland Flagler, Coastal Nassau, Coastal Duval, Eastern Clay, Eastern Putnam, Coastal Flagler, Eastern Marion, Trout River, Western Clay, Northeast Coastal St. Johns, Western Putnam, South Central Duval, Southeast Coastal St. Johns, Western Duval, Northern Inland St. Johns, Southern Inland St. Johns and Western St. Johns. * TIMING...Thursday afternoon through early evening. * WINDS...Southwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 28 percent. * TEMPERATURES...Up to 97. * IMPACTS...Existing or newly ignited wildfires may exhibit erratic fire behavior, spread rapidly and become difficult to contain or suppress.
A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.41 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 109.72 μg/m3
Astronomical
Sun Transit: 1:23 PM
Sunset: 8:08 PM
Daylight: 13 hrs 29 mins
Moon Transit: 5:00 AM
Moonset: 10:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 70.0%
Best Times for Fishing or Hunting
Major Periods
4:30 AM - 7:00 AM6:05 PM - 8:35 PM
Minor Periods
9:30 AM - 11:00 AM12:00 AM - 12:00 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.56 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 99.36 μg/m3
Astronomical
Sun Transit: 1:23 PM
Sunset: 8:09 PM
Daylight: 13 hrs 30 mins
Moon Transit: 5:51 AM
Moonset: 10:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 59.1%
Best Times for Fishing or Hunting
Major Periods
5:21 AM - 7:51 AM6:54 PM - 9:24 PM
Minor Periods
10:27 AM - 11:57 AM12:19 AM - 1:49 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 5.43 μg/m3
Sulphur Dioxide: 3.49 μg/m3
Ozone: 83.48 μg/m3
Astronomical
Sun Transit: 1:23 PM
Sunset: 8:09 PM
Daylight: 13 hrs 32 mins
Moon Transit: 6:39 AM
Moonset: 11:55 AM
Moon Phase: Last Quarter
Moon Illumination: 47.9%
Best Times for Fishing or Hunting
Major Periods
6:09 AM - 8:39 AM7:42 PM - 10:12 PM
Minor Periods
11:25 AM - 12:55 AM12:59 AM - 2:29 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 7.6 μg/m3
Sulphur Dioxide: 4.38 μg/m3
Ozone: 106.96 μg/m3
Astronomical
Sun Transit: 1:23 PM
Sunset: 8:10 PM
Daylight: 13 hrs 33 mins
Moon Transit: 7:26 AM
Moonset: 12:54 AM
Moon Phase: Last Quarter
Moon Illumination: 36.7%
Best Times for Fishing or Hunting
Major Periods
6:56 AM - 9:26 AM8:28 PM - 10:58 PM
Minor Periods
12:24 AM - 1:54 PM1:35 AM - 3:05 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 9.97 μg/m3
Sulphur Dioxide: 4.4 μg/m3
Ozone: 78.69 μg/m3
Astronomical
Sun Transit: 1:23 PM
Sunset: 8:11 PM
Daylight: 13 hrs 34 mins
Moon Transit: 8:11 AM
Moonset: 1:53 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%
Best Times for Fishing or Hunting
Major Periods
7:41 AM - 10:11 AM9:12 PM - 11:42 PM
Minor Periods
1:23 PM - 2:53 PM2:07 AM - 3:37 AM
Action Rating: 2 out of 5
