Water Temperature of Long Sound Near Key Largo, FL

Current Water Temperature

82.0°F

Measurement Time: Monday, May 18, 2026, 6:00 AM EDT

Temperature Locations

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Local Points of Interest

Little Blackwater Sound; Florida Bay; Barnes Sound; Florida Keys National Marine Sactuary; Everglades National Park; Florida Keys; Gulf of Mexico

Long Sound

Station Name: Long Sound, FL
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 0 feet

Nearest Address:
Offshore
Key Largo, FL 33037
Monroe County

GPS Coordinates: 25.235, -80.457

Nearby Water Temperatures

West Highway Creek, Key Largo, FL (0.8 mi)
Little Blackwater Sound, Key Largo, FL (2.1 mi)
Manatee Bay, Homestead, FL (2.2 mi)
Joe Bay, Key Largo, FL (4.2 mi)
Joe Bay, Key Largo, FL (5.3 mi)
Barnes Sound, Key Largo, FL (5.3 mi)
Mud Creek, Homestead, FL (8.2 mi)
Florida Bay, Key Largo, FL (10.9 mi)
Little Madeira Bay, Homestead, FL (11.7 mi)
Taylor River, Homestead, FL (11.8 mi)
Taylor River, Homestead, FL (12.1 mi)
Taylor Slough, Homestead, FL (14.2 mi)
Seven Palm Lake, Flamingo, FL (17.1 mi)
Mowry Canal Number C-103, Homestead, FL (17.7 mi)
Florida Bay, Islamorada, FL (20.1 mi)

Weather Near Key Largo, Florida

Current Weather

84.7°F
Sunny
Sunny
94.5°F
88.8°F
70%
E 19.9 mph
25.6 mph
82.2°F
74.2°F
0 in
25%
9 mi
1019 mbar
2

Five Day Weather Forecast

Patchy rain nearby
Mon
H: 86°F
L: 81°F
Patchy rain nearby
Tue
H: 83°F
L: 82°F
Patchy rain nearby
Wed
H: 82°F
L: 81°F
Patchy rain nearby
Thu
H: 83°F
L: 82°F
Patchy rain nearby
Fri
H: 83°F
L: 80°F

Air Quality

AQI: 1 - Good
PM2.5: 4.85 μg/m3
PM10: 7.35 μg/m3
Carbon Monoxide: 106.85 μg/m3
Nitrogen Dioxide: 1.25 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 60 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 1:18 PM
Sunset: 8:01 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:00 AM
Moon Transit: 3:17 PM
Moonset: 10:34 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
2:47 PM - 5:17 PM

Minor Periods

10:04 PM - 11:34 PM
7:30 AM - 9:00 AM

Action Rating: 3 out of 5

Rip Current Statement issued May 17 at 4:26PM EDT until May 19 at 8:00PM EDT by NWS Miami FL

Effective: Sun May 17, 2026, 4:26 PM
Expires: Mon May 18, 2026, 8:00 AM

* WHAT...Dangerous rip currents expected. * WHERE...Coastal Broward County and Coastal Miami Dade County. * WHEN...Through Tuesday evening. * 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.


Rip Current Statement issued May 18 at 8:11AM EDT until May 19 at 8:00PM EDT by NWS Miami FL

Effective: Mon May 18, 2026, 8:11 AM
Expires: Tue May 19, 2026, 8:00 PM

* WHAT...Dangerous rip currents. * WHERE...Coastal Broward County and Coastal Miami Dade County. * WHEN...Through Tuesday evening. * 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

Patchy rain nearby
86.4°F
81.1°F
82.7°F
76%
0 in
87%
0%
21.5 mph
10.9


Air Quality

AQI: 1 - Good
PM2.5: 4.9 μg/m3
PM10: 7.4 μg/m3
Carbon Monoxide: 109.89 μg/m3
Nitrogen Dioxide: 1.66 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 60.16 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 1:18 PM
Sunset: 8:01 PM
Daylight: 13 hrs 25 mins
Moonrise: 8:00 AM
Moon Transit: 3:17 PM
Moonset: 10:34 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
2:47 PM - 5:17 PM

Minor Periods

10:04 PM - 11:34 PM
7:30 AM - 9:00 AM

Action Rating: 3 out of 5

Tuesday, May 19, 2026

Weather Forecast

Patchy rain nearby
82.8°F
81.9°F
82.3°F
73%
0.14 in
89%
0%
20.8 mph
11


Air Quality

AQI: 1 - Good
PM2.5: 3.89 μg/m3
PM10: 5.77 μg/m3
Carbon Monoxide: 105.93 μg/m3
Nitrogen Dioxide: 1.73 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 64.8 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:18 PM
Sunset: 8:02 PM
Daylight: 13 hrs 26 mins
Moonrise: 9:08 AM
Moon Transit: 4:23 PM
Moonset: 11:35 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

4:40 AM - 7:10 AM
3:53 PM - 6:23 PM

Minor Periods

12:00 AM - 12:00 AM
8:38 AM - 10:08 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Patchy rain nearby
82.3°F
80.6°F
81.9°F
71%
0.13 in
87%
0%
20.1 mph
10.8


Air Quality

AQI: 1 - Good
PM2.5: 3.65 μg/m3
PM10: 5.39 μg/m3
Carbon Monoxide: 106.41 μg/m3
Nitrogen Dioxide: 1.73 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 67.52 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:18 PM
Sunset: 8:02 PM
Daylight: 13 hrs 27 mins
Moonrise: 10:18 AM
Moon Transit: 5:25 PM
Moonset: 12:35 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

5:44 AM - 8:14 AM
4:55 PM - 7:25 PM

Minor Periods

9:48 AM - 11:18 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, May 21, 2026

Weather Forecast

Patchy rain nearby
82.8°F
81.5°F
82.1°F
68%
0.02 in
84%
0%
21.7 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.45 μg/m3
PM10: 5.02 μg/m3
Carbon Monoxide: 108.61 μg/m3
Nitrogen Dioxide: 1.73 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 73.4 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:18 PM
Sunset: 8:03 PM
Daylight: 13 hrs 28 mins
Moonrise: 11:26 AM
Moon Transit: 6:21 PM
Moonset: 12:27 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

6:43 AM - 9:13 AM
5:51 PM - 8:21 PM

Minor Periods

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

Action Rating: 4 out of 5

Friday, May 22, 2026

Weather Forecast

Patchy rain nearby
83.3°F
80.3°F
81.5°F
70%
0.06 in
88%
0%
19.5 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 3.26 μg/m3
PM10: 4.77 μg/m3
Carbon Monoxide: 114.33 μg/m3
Nitrogen Dioxide: 1.85 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 71.92 μg/m3

Astronomical

Sunrise: 6:34 AM
Sun Transit: 1:18 PM
Sunset: 8:03 PM
Daylight: 13 hrs 29 mins
Moonrise: 12:30 AM
Moon Transit: 7:12 PM
Moonset: 1:10 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

7:36 AM - 10:06 AM
6:42 PM - 9:12 PM

Minor Periods

12:00 AM - 1:30 PM
12:40 AM - 2:10 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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