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

Current Water Temperature

85.1°F

Measurement Time: Monday, May 18, 2026, 1:30 PM 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

81°F
Partly cloudy
Partly cloudy
83.8°F
84.5°F
65%
E 11.4 mph
13.1 mph
81.3°F
67.5°F
0 in
75%
9 mi
1022 mbar
1.7

Five Day Weather Forecast

Sunny
Mon
H: 87°F
L: 70°F
Sunny
Tue
H: 89°F
L: 71°F
Patchy rain nearby
Wed
H: 90°F
L: 71°F
Sunny
Thu
H: 93°F
L: 71°F
Patchy rain nearby
Fri
H: 92°F
L: 72°F

Air Quality

AQI: 1 - Good
PM2.5: 13.55 μg/m3
PM10: 20.75 μg/m3
Carbon Monoxide: 166.85 μg/m3
Nitrogen Dioxide: 3.75 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 1:23 PM
Sunset: 8:16 PM
Daylight: 13 hrs 45 mins
Moonrise: 7:50 AM
Moon Transit: 3:22 PM
Moonset: 10:54 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
2:52 PM - 5:22 PM

Minor Periods

10:24 PM - 11:54 PM
7:20 AM - 8:50 AM

Action Rating: 3 out of 5

Rip Current Statement issued May 17 at 11:28PM EDT until May 20 at 5:00AM EDT by NWS Jacksonville FL

Effective: Sun May 17, 2026, 11:28 PM
Expires: Tue May 19, 2026, 5:00 AM

* WHAT...Dangerous rip currents. * WHERE...Southeast Georgia and Northeast Florida Beaches. * WHEN...Through late Tuesday night. * 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.
Monday, May 18, 2026

Weather Forecast

Sunny
87.1°F
70.3°F
78.1°F
70%
0 in
0%
0%
12.1 mph
10


Air Quality

AQI: 1 - Good
PM2.5: 12.91 μg/m3
PM10: 19.53 μg/m3
Carbon Monoxide: 147.93 μg/m3
Nitrogen Dioxide: 3.49 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 105.28 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 1:23 PM
Sunset: 8:16 PM
Daylight: 13 hrs 45 mins
Moonrise: 7:50 AM
Moon Transit: 3:22 PM
Moonset: 10:54 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
2:52 PM - 5:22 PM

Minor Periods

10:24 PM - 11:54 PM
7:20 AM - 8:50 AM

Action Rating: 3 out of 5

Tuesday, May 19, 2026

Weather Forecast

Sunny
89.4°F
70.9°F
79.4°F
65%
0 in
0%
0%
11.4 mph
10


Air Quality

AQI: 1 - Good
PM2.5: 13.42 μg/m3
PM10: 20.25 μg/m3
Carbon Monoxide: 152.53 μg/m3
Nitrogen Dioxide: 3.67 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 89.12 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 1:23 PM
Sunset: 8:17 PM
Daylight: 13 hrs 46 mins
Moonrise: 8:59 AM
Moon Transit: 4:28 PM
Moonset: 11:53 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

4:35 AM - 7:05 AM
3:58 PM - 6:28 PM

Minor Periods

12:00 AM - 12:00 AM
8:29 AM - 9:59 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Patchy rain nearby
90.3°F
71.3°F
79.7°F
67%
0.01 in
75%
0%
13 mph
10


Air Quality

AQI: 1 - Good
PM2.5: 8.57 μg/m3
PM10: 12.29 μg/m3
Carbon Monoxide: 148.57 μg/m3
Nitrogen Dioxide: 6 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 56.84 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 1:23 PM
Sunset: 8:17 PM
Daylight: 13 hrs 47 mins
Moonrise: 10:10 AM
Moon Transit: 5:30 PM
Moonset: 12:53 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

5:39 AM - 8:09 AM
5:00 PM - 7:30 PM

Minor Periods

9:40 AM - 11:10 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, May 21, 2026

Weather Forecast

Sunny
92.6°F
71.3°F
80.7°F
65%
0 in
0%
0%
13 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 7.75 μg/m3
PM10: 11.12 μg/m3
Carbon Monoxide: 145.99 μg/m3
Nitrogen Dioxide: 4.69 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 59.56 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 1:23 PM
Sunset: 8:18 PM
Daylight: 13 hrs 48 mins
Moonrise: 11:21 AM
Moon Transit: 6:26 PM
Moonset: 12:43 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

6:38 AM - 9:08 AM
5:56 PM - 8:26 PM

Minor Periods

10:51 AM - 12:21 AM
12:13 AM - 1:43 AM

Action Rating: 4 out of 5

Friday, May 22, 2026

Weather Forecast

Patchy rain nearby
91.5°F
72.3°F
80.7°F
65%
0.01 in
78%
0%
13.4 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 6.03 μg/m3
PM10: 8.56 μg/m3
Carbon Monoxide: 130.23 μg/m3
Nitrogen Dioxide: 5.78 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 51.77 μg/m3

Astronomical

Sunrise: 6:29 AM
Sun Transit: 1:23 PM
Sunset: 8:18 PM
Daylight: 13 hrs 49 mins
Moonrise: 12:28 AM
Moon Transit: 7:17 PM
Moonset: 1:24 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

7:31 AM - 10:01 AM
6:47 PM - 9:17 PM

Minor Periods

11:58 AM - 1:28 PM
12:54 AM - 2:24 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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