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

Current Water Temperature

86.7°F

Measurement Time: Monday, July 20, 2026, 4:30 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

80.1°F
Sunny
Sunny
85.8°F
89.8°F
87%
S 6.7 mph
7.7 mph
82°F
75.8°F
0 in
25%
9 mi
1015 mbar
1.9

Five Day Weather Forecast

Sunny
Mon
H: 97°F
L: 79°F
Sunny
Tue
H: 100°F
L: 79°F
Sunny
Wed
H: 101°F
L: 80°F
Sunny
Thu
H: 98°F
L: 79°F
Sunny
Fri
H: 95°F
L: 80°F

Air Quality

AQI: 2 - Moderate
PM2.5: 13.2 μg/m3
PM10: 18.1 μg/m3
Carbon Monoxide: 213 μg/m3
Nitrogen Dioxide: 4.1 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 1:33 PM
Sunset: 8:28 PM
Daylight: 13 hrs 50 mins
Moonrise: 1:05 PM
Moon Transit: 6:48 PM
Moonset: 12:55 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:05 AM - 9:35 AM
6:18 PM - 8:48 PM

Minor Periods

12:35 AM - 2:05 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
97°F
79.2°F
86.6°F
71%
0 in
17%
0%
9.2 mph
10.8


Air Quality

AQI: 1 - Good
PM2.5: 10.44 μg/m3
PM10: 14.26 μg/m3
Carbon Monoxide: 151.46 μg/m3
Nitrogen Dioxide: 3.99 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 76.29 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 1:33 PM
Sunset: 8:28 PM
Daylight: 13 hrs 50 mins
Moonrise: 1:05 PM
Moon Transit: 6:48 PM
Moonset: 12:55 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

7:05 AM - 9:35 AM
6:18 PM - 8:48 PM

Minor Periods

12:35 AM - 2:05 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, July 21, 2026

Weather Forecast

Sunny
99.5°F
78.9°F
88.4°F
56%
0 in
4%
0%
9.6 mph
11


Air Quality

AQI: 1 - Good
PM2.5: 11.8 μg/m3
PM10: 15.95 μg/m3
Carbon Monoxide: 139.46 μg/m3
Nitrogen Dioxide: 3.39 μg/m3
Sulphur Dioxide: 1.02 μg/m3
Ozone: 77 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 1:33 PM
Sunset: 8:28 PM
Daylight: 13 hrs 49 mins
Moonrise: 2:03 PM
Moon Transit: 7:32 PM
Moonset: 12:25 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

7:48 AM - 10:18 AM
7:02 PM - 9:32 PM

Minor Periods

1:33 PM - 3:03 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
101°F
79.6°F
89.3°F
55%
0 in
3%
0%
9.6 mph
10.8


Air Quality

AQI: 1 - Good
PM2.5: 14.48 μg/m3
PM10: 20.43 μg/m3
Carbon Monoxide: 138.83 μg/m3
Nitrogen Dioxide: 4.69 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 68.79 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 1:33 PM
Sunset: 8:27 PM
Daylight: 13 hrs 48 mins
Moonrise: 3:01 PM
Moon Transit: 8:17 PM
Moonset: 12:56 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

8:33 AM - 11:03 AM
7:47 PM - 10:17 PM

Minor Periods

2:31 PM - 4:01 PM
12:26 AM - 1:56 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
97.9°F
79.3°F
88.5°F
59%
0.01 in
17%
0%
7.2 mph
10.5


Air Quality

AQI: 2 - Moderate
PM2.5: 16.91 μg/m3
PM10: 26.18 μg/m3
Carbon Monoxide: 145.97 μg/m3
Nitrogen Dioxide: 4.92 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 61.83 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:33 PM
Sunset: 8:27 PM
Daylight: 13 hrs 46 mins
Moonrise: 3:59 PM
Moon Transit: 9:05 PM
Moonset: 1:30 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

9:20 AM - 11:50 AM
8:35 PM - 11:05 PM

Minor Periods

3:29 PM - 4:59 PM
1:00 AM - 2:30 AM

Action Rating: 3 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
94.8°F
80.2°F
85.4°F
66%
0.18 in
62%
0%
7.6 mph
8


Air Quality

AQI: 2 - Moderate
PM2.5: 15.87 μg/m3
PM10: 23.19 μg/m3
Carbon Monoxide: 145.56 μg/m3
Nitrogen Dioxide: 5.94 μg/m3
Sulphur Dioxide: 0.66 μg/m3
Ozone: 41.11 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 1:33 PM
Sunset: 8:26 PM
Daylight: 13 hrs 45 mins
Moonrise: 4:56 PM
Moon Transit: 9:55 PM
Moonset: 2:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

10:09 AM - 12:39 AM
9:25 PM - 11:55 PM

Minor Periods

4:26 PM - 5:56 PM
1:40 AM - 3:10 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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