Water Temperature of Long Sound Near Key Largo, FL

Current Water Temperature

87.1°F

Measurement Time: Tuesday, September 22, 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

81°F
Showers And Thunderstorms
Showers And Thunderstorms
91%
S 8 mph
78°F

Weather Forecast

Showers And Thunderstorms
Overnight
79°F - Showers And Thunderstorms
Showers And Thunderstorms
Wednesday
86°F - Showers And Thunderstorms
Showers And Thunderstorms then Chance Showers And Thunderstorms
Wednesday Night
78°F - Showers And Thunderstorms then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Thursday
87°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Thursday Night
77°F - Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Friday
88°F - Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Friday Night
76°F - Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday
87°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday Night
74°F - Chance Showers And Thunderstorms
Chance Rain Showers
Sunday
87°F - Chance Rain Showers
Slight Chance Showers And Thunderstorms
Sunday Night
74°F - Slight Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday
87°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday Night
75°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Tuesday
87°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely

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

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

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

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

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: 1:13 PM
Sunset: 7:16 PM
Daylight: 12 hrs 5 mins
Moonrise: 6:05 PM
Moon Transit: 12:00 AM
Moonset: 5:08 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:28 AM - 2:58 PM

Minor Periods

5:35 PM - 7:05 PM
4:38 AM - 6:08 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: 7:11 AM
Sun Transit: 1:13 PM
Sunset: 7:16 PM
Daylight: 12 hrs 5 mins
Moonrise: 6:05 PM
Moon Transit: 12:00 AM
Moonset: 5:08 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:28 AM - 2:58 PM

Minor Periods

5:35 PM - 7:05 PM
4:38 AM - 6:08 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: 7:11 AM
Sun Transit: 1:13 PM
Sunset: 7:15 PM
Daylight: 12 hrs 3 mins
Moonrise: 6:37 PM
Moon Transit: 12:01 AM
Moonset: 6:05 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:12 PM - 3:42 PM

Minor Periods

6:07 PM - 7:37 PM
5:35 AM - 7:05 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: 7:11 AM
Sun Transit: 1:13 PM
Sunset: 7:15 PM
Daylight: 12 hrs 3 mins
Moonrise: 6:37 PM
Moon Transit: 12:01 AM
Moonset: 6:05 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:12 PM - 3:42 PM

Minor Periods

6:07 PM - 7:37 PM
5:35 AM - 7:05 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: 7:12 AM
Sun Transit: 1:13 PM
Sunset: 7:14 PM
Daylight: 12 hrs 2 mins
Moonrise: 7:10 PM
Moon Transit: 12:46 AM
Moonset: 7:02 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:16 AM - 2:46 AM
8:03 AM - 10:33 AM

Minor Periods

6:40 PM - 8:10 PM
6:32 AM - 8:02 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: 7:12 AM
Sun Transit: 1:13 PM
Sunset: 7:14 PM
Daylight: 12 hrs 2 mins
Moonrise: 7:10 PM
Moon Transit: 12:46 AM
Moonset: 7:02 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:16 AM - 2:46 AM
8:03 AM - 10:33 AM

Minor Periods

6:40 PM - 8:10 PM
6:32 AM - 8:02 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: 7:12 AM
Sun Transit: 1:12 PM
Sunset: 7:13 PM
Daylight: 12 hrs mins
Moonrise: 7:44 PM
Moon Transit: 1:32 AM
Moonset: 8:01 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

1:02 AM - 3:32 AM
2:44 PM - 5:14 PM

Minor Periods

7:14 PM - 8:44 PM
7:31 AM - 9:01 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: 7:12 AM
Sun Transit: 1:12 PM
Sunset: 7:13 PM
Daylight: 12 hrs mins
Moonrise: 7:44 PM
Moon Transit: 1:32 AM
Moonset: 8:01 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

1:02 AM - 3:32 AM
2:44 PM - 5:14 PM

Minor Periods

7:14 PM - 8:44 PM
7:31 AM - 9:01 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: 7:13 AM
Sun Transit: 1:12 PM
Sunset: 7:11 PM
Daylight: 11 hrs 59 mins
Moonrise: 8:23 PM
Moon Transit: 2:20 AM
Moonset: 9:03 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:50 AM - 4:20 AM
3:34 PM - 6:04 PM

Minor Periods

7:53 PM - 9:23 PM
8:33 AM - 10:03 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: 7:13 AM
Sun Transit: 1:12 PM
Sunset: 7:11 PM
Daylight: 11 hrs 59 mins
Moonrise: 8:23 PM
Moon Transit: 2:20 AM
Moonset: 9:03 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:50 AM - 4:20 AM
3:34 PM - 6:04 PM

Minor Periods

7:53 PM - 9:23 PM
8:33 AM - 10:03 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: 7:13 AM
Sun Transit: 1:12 PM
Sunset: 7:10 PM
Daylight: 11 hrs 57 mins
Moonrise: 9:07 PM
Moon Transit: 3:12 AM
Moonset: 10:08 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:42 AM - 5:12 AM
4:30 PM - 7:00 PM

Minor Periods

8:37 PM - 10:07 PM
9:38 AM - 11:08 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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