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

Current Water Temperature

85.3°F

Measurement Time: Monday, June 15, 2026, 6:30 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

88°F
Sunny
Sunny
104.1°F
100.2°F
68%
W 9.4 mph
10.8 mph
86.4°F
80.8°F
0 in
25%
9 mi
1015 mbar
7.4

Five Day Weather Forecast

Sunny
Mon
H: 90°F
L: 77°F
Patchy rain nearby
Tue
H: 95°F
L: 75°F
Patchy rain nearby
Wed
H: 96°F
L: 73°F
Patchy rain nearby
Thu
H: 98°F
L: 74°F
Patchy rain nearby
Fri
H: 98°F
L: 77°F

Air Quality

AQI: 1 - Good
PM2.5: 9.4 μg/m3
PM10: 12.4 μg/m3
Carbon Monoxide: 125 μg/m3
Nitrogen Dioxide: 1.4 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 75 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:27 PM
Sunset: 8:30 PM
Daylight: 14 hrs 6 mins
Moonrise: 6:36 AM
Moon Transit: 2:07 PM
Moonset: 9:36 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:13 AM - 4:43 AM
1:37 PM - 4:07 PM

Minor Periods

9:06 PM - 10:36 PM
6:06 AM - 7:36 AM

Action Rating: 4 out of 5

Fire Weather Watch issued June 14 at 10:15PM MDT until June 17 at 8:00PM MDT by NWS Cheyenne WY

Effective: Mon June 15, 2026, 12:15 AM
Expires: Mon June 15, 2026, 8:00 AM

RED FLAG CONDITIONS LIKELY THROUGH WEDNESDAY EVENING FOR AREAS EAST OF THE I-25 CORRIDOR. * AFFECTED AREA...Fire weather zone 430. Fire weather zone 431. * WIND... On Tuesday, northwest winds gusting 25 to 40 mph. On Wednesday, northwest winds gusting 40 to 60 mph. * HUMIDITY...10 to 15 percent on Tuesday and Wednesday afternoons. Poor recoveries expected Tuesday night. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.


Fire Weather Watch issued June 15 at 12:32AM MDT until June 17 at 8:00PM MDT by NWS Cheyenne WY

Effective: Mon June 15, 2026, 2:32 AM
Expires: Mon June 15, 2026, 8:00 PM

RED FLAG CONDITIONS LIKELY THROUGH WEDNESDAY EVENING FOR AREAS EAST OF THE I-25 CORRIDOR. * AFFECTED AREA...Fire weather zones 430 and 431. * WIND... On Tuesday, northwest winds gusting 25 to 40 mph. On Wednesday, northwest winds gusting 40 to 60 mph. * HUMIDITY...10 to 15 percent on Tuesday and Wednesday afternoons. Poor recoveries expected Tuesday night. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
Monday, June 15, 2026

Weather Forecast

Sunny
90.3°F
76.8°F
81.7°F
80%
0 in
12%
0%
9.8 mph
11.2


Air Quality

AQI: 1 - Good
PM2.5: 8.49 μg/m3
PM10: 10.56 μg/m3
Carbon Monoxide: 133.38 μg/m3
Nitrogen Dioxide: 3.94 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 56.33 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:27 PM
Sunset: 8:30 PM
Daylight: 14 hrs 6 mins
Moonrise: 6:36 AM
Moon Transit: 2:07 PM
Moonset: 9:36 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:13 AM - 4:43 AM
1:37 PM - 4:07 PM

Minor Periods

9:06 PM - 10:36 PM
6:06 AM - 7:36 AM

Action Rating: 4 out of 5

Tuesday, June 16, 2026

Weather Forecast

Patchy rain nearby
95.3°F
74.6°F
81°F
71%
0.14 in
61%
0%
10.7 mph
11.9


Air Quality

AQI: 1 - Good
PM2.5: 7.35 μg/m3
PM10: 8.81 μg/m3
Carbon Monoxide: 137.17 μg/m3
Nitrogen Dioxide: 4.27 μg/m3
Sulphur Dioxide: 0.62 μg/m3
Ozone: 62.67 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:27 PM
Sunset: 8:31 PM
Daylight: 14 hrs 6 mins
Moonrise: 7:47 AM
Moon Transit: 3:12 PM
Moonset: 10:32 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

3:20 AM - 5:50 AM
2:42 PM - 5:12 PM

Minor Periods

10:02 PM - 11:32 PM
7:17 AM - 8:47 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Patchy rain nearby
95.9°F
73.3°F
81.2°F
73%
0.08 in
57%
0%
8.3 mph
11.4


Air Quality

AQI: 1 - Good
PM2.5: 5.55 μg/m3
PM10: 6.64 μg/m3
Carbon Monoxide: 141 μg/m3
Nitrogen Dioxide: 5.2 μg/m3
Sulphur Dioxide: 0.53 μg/m3
Ozone: 49.29 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:27 PM
Sunset: 8:31 PM
Daylight: 14 hrs 6 mins
Moonrise: 9:01 AM
Moon Transit: 4:13 PM
Moonset: 11:18 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

4:23 AM - 6:53 AM
3:43 PM - 6:13 PM

Minor Periods

12:00 AM - 12:00 AM
8:31 AM - 10:01 AM

Action Rating: 3 out of 5

Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
98.3°F
74.3°F
84.5°F
65%
0.02 in
36%
0%
9.4 mph
10.9


Air Quality

AQI: 1 - Good
PM2.5: 9.16 μg/m3
PM10: 11.53 μg/m3
Carbon Monoxide: 152.4 μg/m3
Nitrogen Dioxide: 5.57 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 55.33 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:27 PM
Sunset: 8:31 PM
Daylight: 14 hrs 6 mins
Moonrise: 10:12 AM
Moon Transit: 5:08 PM
Moonset: 12:18 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

5:21 AM - 7:51 AM
4:38 PM - 7:08 PM

Minor Periods

9:42 AM - 11:12 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, June 19, 2026

Weather Forecast

Patchy rain nearby
98.2°F
77.3°F
85.9°F
64%
0.19 in
59%
0%
9.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 5.58 μg/m3
PM10: 6.43 μg/m3
Carbon Monoxide: 151 μg/m3
Nitrogen Dioxide: 7.67 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 30.67 μg/m3

Astronomical

Sunrise: 6:25 AM
Sun Transit: 1:28 PM
Sunset: 8:32 PM
Daylight: 14 hrs 6 mins
Moonrise: 11:18 AM
Moon Transit: 5:58 PM
Moonset: 12:56 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.3%

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
5:28 PM - 7:58 PM

Minor Periods

10:48 AM - 12:18 AM
12:00 AM - 12:00 AM

Action Rating: 3 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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