Water Temperature of Long Sound Near Key Largo, FL

Current Water Temperature

88.7°F

Measurement Time: Wednesday, September 16, 2026, 2:00 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

83°F
Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
85%
E 14 mph
78°F

Weather Forecast

Chance Showers And Thunderstorms
Overnight
81°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Thursday
88°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Thursday Night
79°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Friday
87°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Friday Night
79°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Saturday
87°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Saturday Night
77°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms
Sunday
89°F - Chance Showers And Thunderstorms then Showers And Thunderstorms
Showers And Thunderstorms then Chance Showers And Thunderstorms
Sunday Night
78°F - Showers And Thunderstorms then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Monday
90°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Monday Night
79°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Tuesday
90°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Tuesday Night
78°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms
Wednesday
89°F - Chance Showers And Thunderstorms then Showers And Thunderstorms

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

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

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

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

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: 7:09 AM
Sun Transit: 1:15 PM
Sunset: 7:22 PM
Daylight: 12 hrs 13 mins
Moonrise: 2:06 PM
Moon Transit: 7:17 PM
Moonset: 12:38 AM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

7:40 AM - 10:10 AM
6:47 PM - 9:17 PM

Minor Periods

1:36 PM - 3:06 PM
12:00 AM - 12:00 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: 7:09 AM
Sun Transit: 1:15 PM
Sunset: 7:22 PM
Daylight: 12 hrs 13 mins
Moonrise: 2:06 PM
Moon Transit: 7:17 PM
Moonset: 12:38 AM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

7:40 AM - 10:10 AM
6:47 PM - 9:17 PM

Minor Periods

1:36 PM - 3:06 PM
12:00 AM - 12:00 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: 7:09 AM
Sun Transit: 1:15 PM
Sunset: 7:21 PM
Daylight: 12 hrs 12 mins
Moonrise: 2:56 PM
Moon Transit: 8:08 PM
Moonset: 12:30 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

8:32 AM - 11:02 AM
7:38 PM - 10:08 PM

Minor Periods

2:26 PM - 3:56 PM
12:00 AM - 1:30 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: 7:09 AM
Sun Transit: 1:15 PM
Sunset: 7:21 PM
Daylight: 12 hrs 12 mins
Moonrise: 2:56 PM
Moon Transit: 8:08 PM
Moonset: 12:30 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

8:32 AM - 11:02 AM
7:38 PM - 10:08 PM

Minor Periods

2:26 PM - 3:56 PM
12:00 AM - 1:30 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: 7:10 AM
Sun Transit: 1:15 PM
Sunset: 7:20 PM
Daylight: 12 hrs 10 mins
Moonrise: 3:41 PM
Moon Transit: 8:58 PM
Moonset: 1:24 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

9:23 AM - 11:53 AM
8:28 PM - 10:58 PM

Minor Periods

3:11 PM - 4:41 PM
12:54 AM - 2:24 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: 7:10 AM
Sun Transit: 1:15 PM
Sunset: 7:20 PM
Daylight: 12 hrs 10 mins
Moonrise: 3:41 PM
Moon Transit: 8:58 PM
Moonset: 1:24 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

9:23 AM - 11:53 AM
8:28 PM - 10:58 PM

Minor Periods

3:11 PM - 4:41 PM
12:54 AM - 2:24 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: 7:10 AM
Sun Transit: 1:14 PM
Sunset: 7:19 PM
Daylight: 12 hrs 9 mins
Moonrise: 4:22 PM
Moon Transit: 9:46 PM
Moonset: 2:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

10:12 AM - 12:42 AM
9:16 PM - 11:46 PM

Minor Periods

3:52 PM - 5:22 PM
1:50 AM - 3:20 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: 7:10 AM
Sun Transit: 1:14 PM
Sunset: 7:19 PM
Daylight: 12 hrs 9 mins
Moonrise: 4:22 PM
Moon Transit: 9:46 PM
Moonset: 2:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

10:12 AM - 12:42 AM
9:16 PM - 11:46 PM

Minor Periods

3:52 PM - 5:22 PM
1:50 AM - 3:20 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: 7:10 AM
Sun Transit: 1:14 PM
Sunset: 7:18 PM
Daylight: 12 hrs 8 mins
Moonrise: 4:59 PM
Moon Transit: 10:33 PM
Moonset: 3:16 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

10:59 AM - 1:29 PM
12:00 AM - 12:00 AM

Minor Periods

4:29 PM - 5:59 PM
2:46 AM - 4:16 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: 7:10 AM
Sun Transit: 1:14 PM
Sunset: 7:18 PM
Daylight: 12 hrs 8 mins
Moonrise: 4:59 PM
Moon Transit: 10:33 PM
Moonset: 3:16 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

10:59 AM - 1:29 PM
12:00 AM - 12:00 AM

Minor Periods

4:29 PM - 5:59 PM
2:46 AM - 4:16 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: 7:11 AM
Sun Transit: 1:14 PM
Sunset: 7:17 PM
Daylight: 12 hrs 6 mins
Moonrise: 5:33 PM
Moon Transit: 11:17 PM
Moonset: 4:13 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

11:44 AM - 2:14 PM
12:00 AM - 12:00 AM

Minor Periods

5:03 PM - 6:33 PM
3:43 AM - 5:13 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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