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

Current Water Temperature

85.6°F

Measurement Time: Saturday, August 1, 2026, 7:30 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

78.1°F
Clear
Clear
82.6°F
83°F
85%
SW 7.2 mph
9.6 mph
78.1°F
73.2°F
0 in
2%
6 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Sat
H: 95°F
L: 78°F
Sunny
Sun
H: 91°F
L: 78°F
Partly Cloudy
Mon
H: 90°F
L: 76°F
Patchy rain nearby
Tue
H: 92°F
L: 74°F
Partly Cloudy
Wed
H: 98°F
L: 75°F

Air Quality

AQI: 1 - Good
PM2.5: 3.4 μg/m3
PM10: 3.7 μg/m3
Carbon Monoxide: 116 μg/m3
Nitrogen Dioxide: 4.4 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 62 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:33 PM
Sunset: 8:21 PM
Daylight: 13 hrs 35 mins
Moonrise: 10:10 PM
Moon Transit: 3:32 AM
Moonset: 9:29 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

3:02 AM - 5:32 AM
12:00 AM - 12:00 AM

Minor Periods

9:40 PM - 11:10 PM
8:59 AM - 10:29 AM

Action Rating: 2 out of 5

Small Craft Advisory issued August 1 at 2:33PM EDT until August 3 at 8:00AM EDT by NWS Jacksonville FL

Effective: Sat August 1, 2026, 2:33 PM
Expires: Sun August 2, 2026, 4:00 AM

* WHAT...Southwest winds 15 to 25 kt expected. * WHERE...All Southeast Georgia coastal waters from Altamaha Sound GA to Fernandina Beach FL out to 60 NM and Coastal waters from Fernandina Beach FL to St Augustine FL out to 60 NM. * WHEN...From 2 PM Sunday to 8 AM EDT Monday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.
Saturday, August 1, 2026

Weather Forecast

Sunny
94.5°F
78.1°F
82.5°F
81%
0.02 in
37%
0%
12.5 mph
9.7


Air Quality

AQI: 1 - Good
PM2.5: 5.9 μg/m3
PM10: 7.05 μg/m3
Carbon Monoxide: 116.92 μg/m3
Nitrogen Dioxide: 3.63 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 76.04 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:33 PM
Sunset: 8:21 PM
Daylight: 13 hrs 35 mins
Moonrise: 10:10 PM
Moon Transit: 3:32 AM
Moonset: 9:29 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

3:02 AM - 5:32 AM
12:00 AM - 12:00 AM

Minor Periods

9:40 PM - 11:10 PM
8:59 AM - 10:29 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
90.7°F
77.5°F
81.7°F
75%
0.12 in
64%
0%
15 mph
8.9


Air Quality

AQI: 1 - Good
PM2.5: 3.41 μg/m3
PM10: 4.23 μg/m3
Carbon Monoxide: 111.25 μg/m3
Nitrogen Dioxide: 2.96 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 58.17 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 1:32 PM
Sunset: 8:20 PM
Daylight: 13 hrs 34 mins
Moonrise: 10:39 PM
Moon Transit: 6:50 PM
Moonset: 10:27 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

6:20 PM - 8:50 PM
6:20 PM - 8:50 PM

Minor Periods

10:09 PM - 11:39 PM
9:57 AM - 11:27 AM

Action Rating: 2 out of 5

Monday, August 3, 2026

Weather Forecast

Partly Cloudy
90.2°F
75.6°F
78.4°F
79%
0.06 in
59%
0%
15 mph
10.4


Air Quality

AQI: 1 - Good
PM2.5: 2.84 μg/m3
PM10: 3.29 μg/m3
Carbon Monoxide: 122.96 μg/m3
Nitrogen Dioxide: 3.23 μg/m3
Sulphur Dioxide: 0.52 μg/m3
Ozone: 61.54 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:32 PM
Sunset: 8:19 PM
Daylight: 13 hrs 32 mins
Moonrise: 11:08 PM
Moon Transit: 12:00 AM
Moonset: 11:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
5:59 PM - 8:29 PM

Minor Periods

12:00 AM - 12:00 AM
10:56 AM - 12:26 AM

Action Rating: 3 out of 5

Tuesday, August 4, 2026

Weather Forecast

Patchy rain nearby
92.4°F
74.4°F
80.1°F
75%
0.19 in
72%
0%
6.3 mph
9.9


Air Quality

AQI: 1 - Good
PM2.5: 5.15 μg/m3
PM10: 6.13 μg/m3
Carbon Monoxide: 139.67 μg/m3
Nitrogen Dioxide: 4.28 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 63.29 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:32 PM
Sunset: 8:18 PM
Daylight: 13 hrs 31 mins
Moonrise: 12:08 AM
Moon Transit: 5:44 AM
Moonset: 12:29 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:14 AM - 7:44 AM
6:47 PM - 9:17 PM

Minor Periods

11:59 AM - 1:29 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Partly Cloudy
97.5°F
75.3°F
84.8°F
63%
0.02 in
36%
0%
10.3 mph
10.3


Air Quality

AQI: 1 - Good
PM2.5: 8.51 μg/m3
PM10: 10.68 μg/m3
Carbon Monoxide: 153 μg/m3
Nitrogen Dioxide: 5.49 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 73.46 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 1:32 PM
Sunset: 8:17 PM
Daylight: 13 hrs 30 mins
Moonrise: 12:41 AM
Moon Transit: 6:33 AM
Moonset: 1:33 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

6:03 AM - 8:33 AM
7:38 PM - 10:08 PM

Minor Periods

1:03 PM - 2:33 PM
12:00 AM - 12:00 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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