Water Temperature of Long Sound Near Key Largo, FL

Current Water Temperature

87.3°F

Measurement Time: Thursday, September 10, 2026, 5:00 PM 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°F
Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
85%
E 9 mph
79°F

Weather Forecast

Chance Showers And Thunderstorms
Overnight
82°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Friday
89°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Friday Night
82°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday
89°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Saturday Night
82°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Sunday
88°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Sunday Night
80°F - Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday
90°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday Night
79°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Tuesday
91°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Tuesday Night
79°F - Chance Showers And Thunderstorms
Showers And Thunderstorms Likely
Wednesday
90°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Wednesday Night
78°F - Showers And Thunderstorms Likely
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Thursday
89°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:18 PM
Sunset: 7:30 PM
Daylight: 12 hrs 24 mins
Moonrise: 7:30 AM
Moon Transit: 1:42 PM
Moonset: 7:48 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

2:08 AM - 4:38 AM
1:12 PM - 3:42 PM

Minor Periods

7:18 PM - 8:48 PM
7:00 AM - 8:30 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:18 PM
Sunset: 7:30 PM
Daylight: 12 hrs 24 mins
Moonrise: 7:30 AM
Moon Transit: 1:42 PM
Moonset: 7:48 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

2:08 AM - 4:38 AM
1:12 PM - 3:42 PM

Minor Periods

7:18 PM - 8:48 PM
7:00 AM - 8:30 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:18 PM
Sunset: 7:30 PM
Daylight: 12 hrs 24 mins
Moonrise: 7:30 AM
Moon Transit: 1:42 PM
Moonset: 7:48 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

2:08 AM - 4:38 AM
1:12 PM - 3:42 PM

Minor Periods

7:18 PM - 8:48 PM
7:00 AM - 8:30 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 1:18 PM
Sunset: 7:30 PM
Daylight: 12 hrs 24 mins
Moonrise: 7:30 AM
Moon Transit: 1:42 PM
Moonset: 7:48 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

2:08 AM - 4:38 AM
1:12 PM - 3:42 PM

Minor Periods

7:18 PM - 8:48 PM
7:00 AM - 8:30 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 1:18 PM
Sunset: 7:29 PM
Daylight: 12 hrs 22 mins
Moonrise: 8:28 AM
Moon Transit: 2:27 PM
Moonset: 8:21 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
1:57 PM - 4:27 PM

Minor Periods

7:51 PM - 9:21 PM
7:58 AM - 9:28 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 1:18 PM
Sunset: 7:29 PM
Daylight: 12 hrs 22 mins
Moonrise: 8:28 AM
Moon Transit: 2:27 PM
Moonset: 8:21 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

2:53 AM - 5:23 AM
1:57 PM - 4:27 PM

Minor Periods

7:51 PM - 9:21 PM
7:58 AM - 9:28 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 1:17 PM
Sunset: 7:28 PM
Daylight: 12 hrs 21 mins
Moonrise: 9:25 AM
Moon Transit: 3:12 PM
Moonset: 8:55 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

3:38 AM - 6:08 AM
2:42 PM - 5:12 PM

Minor Periods

8:25 PM - 9:55 PM
8:55 AM - 10:25 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 1:17 PM
Sunset: 7:28 PM
Daylight: 12 hrs 21 mins
Moonrise: 9:25 AM
Moon Transit: 3:12 PM
Moonset: 8:55 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

3:38 AM - 6:08 AM
2:42 PM - 5:12 PM

Minor Periods

8:25 PM - 9:55 PM
8:55 AM - 10:25 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 1:17 PM
Sunset: 7:27 PM
Daylight: 12 hrs 19 mins
Moonrise: 10:23 AM
Moon Transit: 3:58 PM
Moonset: 9:30 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
3:28 PM - 5:58 PM

Minor Periods

9:00 PM - 10:30 PM
9:53 AM - 11:23 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 1:17 PM
Sunset: 7:27 PM
Daylight: 12 hrs 19 mins
Moonrise: 10:23 AM
Moon Transit: 3:58 PM
Moonset: 9:30 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
3:28 PM - 5:58 PM

Minor Periods

9:00 PM - 10:30 PM
9:53 AM - 11:23 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:16 PM
Sunset: 7:25 PM
Daylight: 12 hrs 18 mins
Moonrise: 11:19 AM
Moon Transit: 4:46 PM
Moonset: 10:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
4:16 PM - 6:46 PM

Minor Periods

9:39 PM - 11:09 PM
10:49 AM - 12:19 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:16 PM
Sunset: 7:25 PM
Daylight: 12 hrs 18 mins
Moonrise: 11:19 AM
Moon Transit: 4:46 PM
Moonset: 10:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
4:16 PM - 6:46 PM

Minor Periods

9:39 PM - 11:09 PM
10:49 AM - 12:19 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:16 PM
Sunset: 7:24 PM
Daylight: 12 hrs 16 mins
Moonrise: 12:17 AM
Moon Transit: 5:35 PM
Moonset: 10:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

5:59 AM - 8:29 AM
5:05 PM - 7:35 PM

Minor Periods

10:22 PM - 11:52 PM
11:47 AM - 1:17 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:16 PM
Sunset: 7:24 PM
Daylight: 12 hrs 16 mins
Moonrise: 12:17 AM
Moon Transit: 5:35 PM
Moonset: 10:52 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

5:59 AM - 8:29 AM
5:05 PM - 7:35 PM

Minor Periods

10:22 PM - 11:52 PM
11:47 AM - 1:17 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:16 PM
Sunset: 7:23 PM
Daylight: 12 hrs 15 mins
Moonrise: 1:12 PM
Moon Transit: 6:26 PM
Moonset: 11:38 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

6:49 AM - 9:19 AM
5:56 PM - 8:26 PM

Minor Periods

12:00 AM - 12:00 AM
12:42 AM - 2:12 PM

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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