Water Temperature of Long Sound Near Key Largo, FL

Current Water Temperature

82.4°F

Measurement Time: Tuesday, October 21, 2025, 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

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Long Sound

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

Elevation Above Sea Level: 0 feet / 0 meters

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

76.6°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 93%
Feels Like: 81.5°F
Wind: ESE 11.6 mph
Wind Gusts: 16.7 mph
Pressure: 30.01 in
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Tue
H: 84°F
L: 78°F
Sunny
Wed
H: 81°F
L: 78°F
Sunny
Thu
H: 84°F
L: 78°F
Moderate rain
Fri
H: 80°F
L: 79°F
Patchy rain nearby
Sat
H: 81°F
L: 79°F

Air Quality

AQI: 1 - Good
PM2.5: 5.45 μg/m3
PM10: 7.95 μg/m3
Carbon Monoxide: 104.85 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 1:06 PM
Sunset: 6:49 PM
Daylight: 11 hrs 26 mins
Moonrise: 7:27 AM
Moon Transit: 1:09 PM
Moonset: 6:47 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

1:37 AM - 4:07 AM
12:39 AM - 3:09 PM

Minor Periods

6:17 PM - 7:47 PM
6:57 AM - 8:27 AM

Action Rating: 4 out of 5

Coastal Flood Statement issued October 20 at 10:25PM EDT until October 21 at 5:00AM EDT by NWS Key West FL

Effective: Mon October 20, 2025, 10:25 PM
Expires: Tue October 21, 2025, 5:00 AM

* WHAT...Minor saltwater flooding. * WHERE...Florida Keys. * WHEN...Until 5 AM EDT Tuesday. * IMPACTS...Minor saltwater flooding of low elevation streets and lots is likely. Some storm drains will overflow, and some seawalls and docks will be overtopped. Boaters can expect less clearance under fixed bridges. Motorists should remember that persistent puddles around the times of high tide are almost certain to contain a mix of saltwater.

Do not drive through flooded roadways.
Tuesday, October 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 79.9°F
Average Humidity: 87%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 1.6

Air Quality

AQI: 1 - Good
PM2.5: 4.74 μg/m3
PM10: 6.72 μg/m3
Carbon Monoxide: 105.61 μg/m3
Nitrogen Dioxide: 2.06 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 84.88 μg/m3

Astronomical

Sunrise: 7:23 AM
Sun Transit: 1:06 PM
Sunset: 6:49 PM
Daylight: 11 hrs 26 mins
Moonrise: 7:27 AM
Moon Transit: 1:09 PM
Moonset: 6:47 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

1:37 AM - 4:07 AM
12:39 AM - 3:09 PM

Minor Periods

6:17 PM - 7:47 PM
6:57 AM - 8:27 AM

Action Rating: 4 out of 5

Wednesday, October 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 79°F
Average Humidity: 86%
Chance of Rain: 0%
Wind: 17.9 mph
UV Index: 1.7

Air Quality

AQI: 1 - Good
PM2.5: 6.55 μg/m3
PM10: 9.4 μg/m3
Carbon Monoxide: 108.29 μg/m3
Nitrogen Dioxide: 2.98 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 84.12 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 1:06 PM
Sunset: 6:48 PM
Daylight: 11 hrs 25 mins
Moonrise: 8:21 AM
Moon Transit: 1:52 PM
Moonset: 7:21 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

2:19 AM - 4:49 AM
1:22 PM - 3:52 PM

Minor Periods

6:51 PM - 8:21 PM
7:51 AM - 9:21 AM

Action Rating: 5 out of 5

Thursday, October 23, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 79.5°F
Average Humidity: 77%
Chance of Rain: 0%
Wind: 22.8 mph
UV Index: 1.7

Air Quality

AQI: 1 - Good
PM2.5: 6.13 μg/m3
PM10: 8.58 μg/m3
Carbon Monoxide: 107.85 μg/m3
Nitrogen Dioxide: 3.91 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 79.92 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 1:06 PM
Sunset: 6:48 PM
Daylight: 11 hrs 23 mins
Moonrise: 9:15 AM
Moon Transit: 2:38 PM
Moonset: 7:59 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

3:04 AM - 5:34 AM
2:08 PM - 4:38 PM

Minor Periods

7:29 PM - 8:59 PM
8:45 AM - 10:15 AM

Action Rating: 3 out of 5

Friday, October 24, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 79.5°F
Average Humidity: 77%
Chance of Rain: 87%
Wind: 24.4 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 5.75 μg/m3
PM10: 8.09 μg/m3
Carbon Monoxide: 111.29 μg/m3
Nitrogen Dioxide: 2.39 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 87.04 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 1:05 PM
Sunset: 6:47 PM
Daylight: 11 hrs 22 mins
Moonrise: 10:10 AM
Moon Transit: 3:26 PM
Moonset: 8:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

3:51 AM - 6:21 AM
2:56 PM - 5:26 PM

Minor Periods

8:11 PM - 9:41 PM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Saturday, October 25, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 79.8°F
Average Humidity: 78%
Chance of Rain: 88%
Wind: 25.9 mph
UV Index: 6

Air Quality

AQI: 1 - Good
PM2.5: 5.28 μg/m3
PM10: 7.75 μg/m3
Carbon Monoxide: 112.23 μg/m3
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 72.38 μg/m3

Astronomical

Sunrise: 7:25 AM
Sun Transit: 1:05 PM
Sunset: 6:46 PM
Daylight: 11 hrs 21 mins
Moonrise: 11:05 AM
Moon Transit: 4:17 PM
Moonset: 9:29 PM
Moon Phase: Waxing Crescent
Moon Illumination: 12.2%

Best Times for Fishing or Hunting

Major Periods

4:41 AM - 7:11 AM
3:47 PM - 6:17 PM

Minor Periods

8:59 PM - 10:29 PM
10:35 AM - 12:05 AM

Action Rating: 4 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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