Water Temperature of Long Sound Near Key Largo, FL

Current Water Temperature

84.9°F

Measurement Time: Tuesday, October 7, 2025, 10:00 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

86.2°F
Partly cloudy
Conditions: Partly cloudy
Humidity: 66%
Feels Like: 100.9°F
Wind: E 10.3 mph
Wind Gusts: 13.6 mph
Pressure: 29.88 in
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 7.1

Five Day Weather Forecast

Partly Cloudy
Tue
H: 85°F
L: 76°F
Moderate rain
Wed
H: 82°F
L: 79°F
Heavy rain
Thu
H: 82°F
L: 78°F
Heavy rain
Fri
H: 83°F
L: 77°F
Patchy rain nearby
Sat
H: 82°F
L: 80°F

Air Quality

AQI: 1 - Good
PM2.5: 2.65 μg/m3
PM10: 3.45 μg/m3
Carbon Monoxide: 112.85 μg/m3
Nitrogen Dioxide: 2.45 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 71 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 1:09 PM
Sunset: 7:02 PM
Daylight: 11 hrs 46 mins
Moonrise: 7:22 PM
Moon Transit: 1:08 AM
Moonset: 7:41 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
2:23 PM - 4:53 PM

Minor Periods

6:52 PM - 8:22 PM
7:11 AM - 8:41 AM

Action Rating: 5 out of 5

Coastal Flood Statement issued October 7 at 6:58AM EDT until October 8 at 8:00PM EDT by NWS Miami FL

Effective: Tue October 7, 2025, 6:58 AM
Expires: Tue October 7, 2025, 4:00 PM

* WHAT...Isolated minor coastal flooding. * WHERE...Coastal Collier County, Mainland Monroe and Far South Miami-Dade County. * WHEN...Through Wednesday evening. * IMPACTS...Some water on low lying roads and property.

Do not drive through flooded roadways.


Coastal Flood Advisory issued October 7 at 4:11AM EDT until October 8 at 6:00AM EDT by NWS Key West FL

Effective: Tue October 7, 2025, 4:11 AM
Expires: Tue October 7, 2025, 12:15 PM

* WHAT...Saltwater flooding. * WHERE...Florida Keys. * WHEN...Until 6 AM EDT Wednesday. * IMPACTS...Saltwater flooding of low elevation streets and lots is expected. 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.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.


Coastal Flood Statement issued October 7 at 1:54PM EDT until October 9 at 8:00PM EDT by NWS Miami FL

Effective: Tue October 7, 2025, 1:54 PM
Expires: Wed October 8, 2025, 8:00 AM

* WHAT...Isolated minor coastal flooding. * WHERE...Coastal Collier County, Mainland Monroe and Far South Miami-Dade County. * WHEN...Through Thursday evening. * IMPACTS...Some water on low lying roads and property.

Do not drive through flooded roadways.


Rip Current Statement issued October 7 at 6:58AM EDT until October 8 at 8:00PM EDT by NWS Miami FL

Effective: Tue October 7, 2025, 6:58 AM
Expires: Tue October 7, 2025, 4:00 PM

* WHAT...For the Coastal Flood Advisory, moderate coastal flooding. For the High Rip Current Risk, dangerous rip currents expected. * WHERE...Coastal Miami Dade County. * WHEN...For the Coastal Flood Advisory, until 8 PM EDT Wednesday. For the High Rip Current Risk, from 8 PM EDT this evening through Wednesday evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Rip currents can sweep even the best swimmers away from shore into deeper water.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. 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.


Coastal Flood Advisory issued October 7 at 6:58AM EDT until October 8 at 8:00PM EDT by NWS Miami FL

Effective: Tue October 7, 2025, 6:58 AM
Expires: Tue October 7, 2025, 4:00 PM

* WHAT...For the Coastal Flood Advisory, moderate coastal flooding. For the High Rip Current Risk, dangerous rip currents expected. * WHERE...Coastal Miami Dade County. * WHEN...For the Coastal Flood Advisory, until 8 PM EDT Wednesday. For the High Rip Current Risk, from 8 PM EDT this evening through Wednesday evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Rip currents can sweep even the best swimmers away from shore into deeper water.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. 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 October 7 at 1:54PM EDT until October 8 at 8:00PM EDT by NWS Miami FL

Effective: Tue October 7, 2025, 1:54 PM
Expires: Wed October 8, 2025, 8:00 AM

* WHAT...For the Coastal Flood Advisory, moderate coastal flooding. For the High Rip Current Risk, dangerous rip currents expected. * WHERE...Coastal Miami Dade County. * WHEN...For the Coastal Flood Advisory, until 8 PM EDT Thursday. For the High Rip Current Risk, through Wednesday evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Rip currents can sweep even the best swimmers away from shore into deeper water.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. 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.


Coastal Flood Advisory issued October 7 at 1:54PM EDT until October 9 at 8:00PM EDT by NWS Miami FL

Effective: Tue October 7, 2025, 1:54 PM
Expires: Wed October 8, 2025, 8:00 AM

* WHAT...For the Coastal Flood Advisory, moderate coastal flooding. For the High Rip Current Risk, dangerous rip currents expected. * WHERE...Coastal Miami Dade County. * WHEN...For the Coastal Flood Advisory, until 8 PM EDT Thursday. For the High Rip Current Risk, through Wednesday evening. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures expected. Rip currents can sweep even the best swimmers away from shore into deeper water.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. 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.


Tuesday, October 7, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 81.1°F
Average Humidity: 83%
Chance of Rain: 0%
Wind: 14.1 mph
UV Index: 2.1

Air Quality

AQI: 1 - Good
PM2.5: 3.76 μg/m3
PM10: 4.97 μg/m3
Carbon Monoxide: 116.17 μg/m3
Nitrogen Dioxide: 2.31 μg/m3
Sulphur Dioxide: 1.17 μg/m3
Ozone: 83.64 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 1:09 PM
Sunset: 7:02 PM
Daylight: 11 hrs 46 mins
Moonrise: 7:22 PM
Moon Transit: 1:08 AM
Moonset: 7:41 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
2:23 PM - 4:53 PM

Minor Periods

6:52 PM - 8:22 PM
7:11 AM - 8:41 AM

Action Rating: 5 out of 5

Wednesday, October 8, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 80.8°F
Average Humidity: 80%
Chance of Rain: 85%
Wind: 15.4 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 2.58 μg/m3
PM10: 3.38 μg/m3
Carbon Monoxide: 111.49 μg/m3
Nitrogen Dioxide: 2.23 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 68.08 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 1:09 PM
Sunset: 7:01 PM
Daylight: 11 hrs 44 mins
Moonrise: 8:05 PM
Moon Transit: 2:01 AM
Moonset: 8:49 AM
Moon Phase: Full
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

1:31 AM - 4:01 AM
3:18 PM - 5:48 PM

Minor Periods

7:35 PM - 9:05 PM
8:19 AM - 9:49 AM

Action Rating: 3 out of 5

Thursday, October 9, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 80.3°F
Average Humidity: 83%
Chance of Rain: 89%
Wind: 17.7 mph
UV Index: 2

Air Quality

AQI: 1 - Good
PM2.5: 2.86 μg/m3
PM10: 3.79 μg/m3
Carbon Monoxide: 112.01 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 65.08 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 1:08 PM
Sunset: 7:00 PM
Daylight: 11 hrs 43 mins
Moonrise: 8:53 PM
Moon Transit: 2:58 AM
Moonset: 9:59 AM
Moon Phase: Waning Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

2:28 AM - 4:58 AM
4:17 PM - 6:47 PM

Minor Periods

8:23 PM - 9:53 PM
9:29 AM - 10:59 AM

Action Rating: 3 out of 5

Friday, October 10, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 79.6°F
Average Humidity: 84%
Chance of Rain: 86%
Wind: 14.1 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 2.73 μg/m3
PM10: 3.44 μg/m3
Carbon Monoxide: 113.37 μg/m3
Nitrogen Dioxide: 1.81 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 69.56 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 1:08 PM
Sunset: 6:59 PM
Daylight: 11 hrs 41 mins
Moonrise: 9:48 PM
Moon Transit: 3:58 AM
Moonset: 11:10 AM
Moon Phase: Waning Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

3:28 AM - 5:58 AM
5:20 PM - 7:50 PM

Minor Periods

9:18 PM - 10:48 PM
10:40 AM - 12:10 AM

Action Rating: 2 out of 5

Saturday, October 11, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 81.7°F
Average Humidity: 73%
Chance of Rain: 85%
Wind: 14.1 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.25 μg/m3
PM10: 2.75 μg/m3
Carbon Monoxide: 115.62 μg/m3
Nitrogen Dioxide: 2.58 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 63.08 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 1:08 PM
Sunset: 6:58 PM
Daylight: 11 hrs 40 mins
Moonrise: 10:49 PM
Moon Transit: 5:02 AM
Moonset: 12:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 72.9%

Best Times for Fishing or Hunting

Major Periods

4:32 AM - 7:02 AM
6:24 PM - 8:54 PM

Minor Periods

10:19 PM - 11:49 PM
11:49 AM - 1:19 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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