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

Current Water Temperature

75.4°F

Measurement Time: Wednesday, May 6, 2026, 1:30 AM EDT

Temperature Locations

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Local Points of Interest

Riverfront Park; Marco Lake

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

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

69.1°F
Partly cloudy
Partly cloudy
69.1°F
67.1°F
73%
S 4 mph
7.5 mph
67.1°F
62.1°F
0 in
50%
9 mi
1016 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 94°F
L: 67°F
Patchy rain nearby
Thu
H: 99°F
L: 70°F
Moderate rain
Fri
H: 85°F
L: 70°F
Moderate rain
Sat
H: 82°F
L: 69°F
Patchy rain nearby
Sun
H: 94°F
L: 69°F

Air Quality

AQI: 1 - Good
PM2.5: 7.65 μg/m3
PM10: 9.85 μg/m3
Carbon Monoxide: 170.85 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 4.25 μg/m3
Ozone: 104 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 1:23 PM
Sunset: 8:08 PM
Daylight: 13 hrs 29 mins
Moonrise: 12:03 AM
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 AM
6:05 PM - 8:35 PM

Minor Periods

9:30 AM - 11:00 AM
12:00 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.


Wednesday, May 6, 2026

Weather Forecast

Sunny
94.1°F
66.9°F
78.2°F
62%
0 in
0%
0%
9.8 mph
9.4


Air Quality

AQI: 1 - Good
PM2.5: 7.23 μg/m3
PM10: 9.25 μg/m3
Carbon Monoxide: 163.93 μg/m3
Nitrogen Dioxide: 5.41 μg/m3
Sulphur Dioxide: 2.95 μg/m3
Ozone: 109.72 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 1:23 PM
Sunset: 8:08 PM
Daylight: 13 hrs 29 mins
Moonrise: 12:03 AM
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 AM
6:05 PM - 8:35 PM

Minor Periods

9:30 AM - 11:00 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Thursday, May 7, 2026

Weather Forecast

Patchy rain nearby
98.7°F
69.8°F
82.2°F
48%
0.03 in
89%
0%
15.2 mph
10.7


Air Quality

AQI: 1 - Good
PM2.5: 7.35 μg/m3
PM10: 8.52 μg/m3
Carbon Monoxide: 169.85 μg/m3
Nitrogen Dioxide: 7.56 μg/m3
Sulphur Dioxide: 2.5 μg/m3
Ozone: 99.36 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 1:23 PM
Sunset: 8:09 PM
Daylight: 13 hrs 30 mins
Moonrise: 12:49 AM
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 AM
6:54 PM - 9:24 PM

Minor Periods

10:27 AM - 11:57 AM
12:19 AM - 1:49 AM

Action Rating: 2 out of 5

Friday, May 8, 2026

Weather Forecast

Moderate rain
84.6°F
69.8°F
75.2°F
80%
0.25 in
82%
0%
9.2 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 9.94 μg/m3
PM10: 11.7 μg/m3
Carbon Monoxide: 176.13 μg/m3
Nitrogen Dioxide: 5.43 μg/m3
Sulphur Dioxide: 3.49 μg/m3
Ozone: 83.48 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 1:23 PM
Sunset: 8:09 PM
Daylight: 13 hrs 32 mins
Moonrise: 1:29 AM
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 AM
7:42 PM - 10:12 PM

Minor Periods

11:25 AM - 12:55 AM
12:59 AM - 2:29 AM

Action Rating: 4 out of 5

Saturday, May 9, 2026

Weather Forecast

Moderate rain
81.6°F
68.8°F
73.7°F
86%
0.34 in
88%
0%
6.5 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 14.21 μg/m3
PM10: 17.26 μg/m3
Carbon Monoxide: 175.01 μg/m3
Nitrogen Dioxide: 7.6 μg/m3
Sulphur Dioxide: 4.38 μg/m3
Ozone: 106.96 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 1:23 PM
Sunset: 8:10 PM
Daylight: 13 hrs 33 mins
Moonrise: 2:05 AM
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 AM
8:28 PM - 10:58 PM

Minor Periods

12:24 AM - 1:54 PM
1:35 AM - 3:05 AM

Action Rating: 4 out of 5

Sunday, May 10, 2026

Weather Forecast

Patchy rain nearby
94°F
68.6°F
78.2°F
71%
0.03 in
62%
0%
8.3 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 13.23 μg/m3
PM10: 13.82 μg/m3
Carbon Monoxide: 214.43 μg/m3
Nitrogen Dioxide: 9.97 μg/m3
Sulphur Dioxide: 4.4 μg/m3
Ozone: 78.69 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 1:23 PM
Sunset: 8:11 PM
Daylight: 13 hrs 34 mins
Moonrise: 2:37 AM
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 AM
9:12 PM - 11:42 PM

Minor Periods

1:23 PM - 2:53 PM
2:07 AM - 3:37 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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