Water Temperature of Little Blackwater Sound Near Key Largo, FL

Current Water Temperature

86.9°F

Measurement Time: Wednesday, September 17, 2025, 10:00 AM EDT

Temperature Locations

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Local Points of Interest

Everglades National Park; Long Sound; Florida Bay; Manatee Bay; Barnes Sound; Cross Key; Florida Keys National Marine Sactuary; Florida Keys; Gulf of Mexico; Overseas Hwy

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Little Blackwater Sound

Station Name: Little Blackwater, 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: 25.214, -80.432

Nearby Water Temperatures

Manatee Bay, Homestead, FL (1.8 mi)
Long Sound, Key Largo, FL (2.1 mi)
West Highway Creek, Key Largo, FL (2.2 mi)
Barnes Sound, Key Largo, FL (5.6 mi)
Joe Bay, Key Largo, FL (5.9 mi)
Joe Bay, Key Largo, FL (6.8 mi)
Florida Bay, Key Largo, FL (10.3 mi)
Little Madeira Bay, Homestead, FL (12.8 mi)
Taylor River, Homestead, FL (13.0 mi)
Taylor River, Homestead, FL (13.6 mi)
Taylor Slough, Homestead, FL (15.9 mi)
Seven Palm Lake, Flamingo, FL (18.4 mi)
Mowry Canal Number C-103, Homestead, FL (18.6 mi)
Florida Bay, Islamorada, FL (20.2 mi)
Whipray Basin, Islamorada, FL (21.3 mi)

Weather Near Key Largo, Florida

Current Weather

84.7°F
Moderate or heavy rain with thunder
Conditions: Moderate or heavy rain with thunder
Humidity: 58%
Feels Like: 97.2°F
Wind: NE 22.8 mph
Wind Gusts: 28.2 mph
Pressure: 29.95 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 2.4

Five Day Weather Forecast

Moderate rain
Wed
H: 85°F
L: 78°F
Heavy rain
Thu
H: 83°F
L: 80°F
Heavy rain
Fri
H: 83°F
L: 80°F
Moderate rain
Sat
H: 84°F
L: 83°F
Patchy rain nearby
Sun
H: 84°F
L: 83°F

Air Quality

AQI: 1 - Good
PM2.5: 5.92 μg/m3
PM10: 8.88 μg/m3
Carbon Monoxide: 186.85 μg/m3
Nitrogen Dioxide: 3.89 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 63 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:16 PM
Sunset: 7:23 PM
Daylight: 12 hrs 14 mins
Moonrise: 3:05 AM
Moon Transit: 10:07 AM
Moonset: 5:03 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:37 AM - 12:07 AM

Minor Periods

4:33 PM - 6:03 PM
2:35 AM - 4:05 AM

Action Rating: 2 out of 5

Coastal Flood Statement issued September 17 at 4:10AM EDT until September 18 at 6:00AM EDT by NWS Key West FL

Effective: Wed September 17, 2025, 4:10 AM
Expires: Wed September 17, 2025, 2:15 PM

* WHAT...Minor saltwater flooding. * WHERE...Upper Florida Keys. * WHEN...Through late tonight. * 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.


Coastal Flood Statement issued September 17 at 4:10AM EDT until September 18 at 6:00AM EDT by NWS Key West FL

Effective: Wed September 17, 2025, 4:10 AM
Expires: Wed September 17, 2025, 2:15 PM

* WHAT...Minor saltwater flooding. * WHERE...Upper Florida Keys. * WHEN...Through late tonight. * 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.


Coastal Flood Statement issued September 17 at 4:10AM EDT until September 18 at 6:00AM EDT by NWS Key West FL

Effective: Wed September 17, 2025, 4:10 AM
Expires: Wed September 17, 2025, 2:15 PM

* WHAT...Minor saltwater flooding. * WHERE...Upper Florida Keys. * WHEN...Through late tonight. * 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.


Coastal Flood Statement issued September 17 at 4:10AM EDT until September 18 at 6:00AM EDT by NWS Key West FL

Effective: Wed September 17, 2025, 4:10 AM
Expires: Wed September 17, 2025, 2:15 PM

* WHAT...Minor saltwater flooding. * WHERE...Upper Florida Keys. * WHEN...Through late tonight. * 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.


Coastal Flood Statement issued September 17 at 4:10AM EDT until September 18 at 6:00AM EDT by NWS Key West FL

Effective: Wed September 17, 2025, 4:10 AM
Expires: Wed September 17, 2025, 2:15 PM

* WHAT...Minor saltwater flooding. * WHERE...Upper Florida Keys. * WHEN...Through late tonight. * 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.
Wednesday, September 17, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 82.5°F
Average Humidity: 83%
Chance of Rain: 88%
Wind: 22.8 mph
UV Index: 0.9

Air Quality

AQI: 1 - Good
PM2.5: 8.61 μg/m3
PM10: 12.76 μg/m3
Carbon Monoxide: 199.36 μg/m3
Nitrogen Dioxide: 4.54 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 1:16 PM
Sunset: 7:23 PM
Daylight: 12 hrs 14 mins
Moonrise: 3:05 AM
Moon Transit: 10:07 AM
Moonset: 5:03 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:37 AM - 12:07 AM

Minor Periods

4:33 PM - 6:03 PM
2:35 AM - 4:05 AM

Action Rating: 2 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 81.5°F
Average Humidity: 83%
Chance of Rain: 88%
Wind: 17 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 4.34 μg/m3
PM10: 6.37 μg/m3
Carbon Monoxide: 184.78 μg/m3
Nitrogen Dioxide: 3.23 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 57.44 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 1:15 PM
Sunset: 7:22 PM
Daylight: 12 hrs 13 mins
Moonrise: 4:07 AM
Moon Transit: 10:57 AM
Moonset: 5:42 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:27 AM - 12:57 AM

Minor Periods

5:12 PM - 6:42 PM
3:37 AM - 5:07 AM

Action Rating: 2 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 82.3°F
Average Humidity: 79%
Chance of Rain: 87%
Wind: 11 mph
UV Index: 2.3

Air Quality

AQI: 1 - Good
PM2.5: 4.48 μg/m3
PM10: 6.3 μg/m3
Carbon Monoxide: 198.47 μg/m3
Nitrogen Dioxide: 5.96 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 50.2 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 1:15 PM
Sunset: 7:21 PM
Daylight: 12 hrs 12 mins
Moonrise: 5:06 AM
Moon Transit: 11:43 AM
Moonset: 6:16 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:10 AM - 2:40 AM
11:13 AM - 1:43 PM

Minor Periods

5:46 PM - 7:16 PM
4:36 AM - 6:06 AM

Action Rating: 3 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 83.4°F
Average Humidity: 77%
Chance of Rain: 85%
Wind: 12.1 mph
UV Index: 2.4

Air Quality

AQI: 1 - Good
PM2.5: 4.13 μg/m3
PM10: 5.71 μg/m3
Carbon Monoxide: 194.99 μg/m3
Nitrogen Dioxide: 7.67 μg/m3
Sulphur Dioxide: 1.51 μg/m3
Ozone: 53.6 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 1:15 PM
Sunset: 7:20 PM
Daylight: 12 hrs 10 mins
Moonrise: 6:02 AM
Moon Transit: 12:27 AM
Moonset: 6:46 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:54 AM - 3:24 AM
11:57 AM - 2:27 PM

Minor Periods

6:16 PM - 7:46 PM
5:32 AM - 7:02 AM

Action Rating: 4 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 83.6°F
Average Humidity: 70%
Chance of Rain: 88%
Wind: 5.8 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 5.59 μg/m3
PM10: 7.94 μg/m3
Carbon Monoxide: 201.79 μg/m3
Nitrogen Dioxide: 3.73 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 60.54 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 1:14 PM
Sunset: 7:19 PM
Daylight: 12 hrs 9 mins
Moonrise: 6:56 AM
Moon Transit: 1:08 PM
Moonset: 7:15 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

1:36 AM - 4:06 AM
12:38 AM - 3:08 PM

Minor Periods

6:45 PM - 8:15 PM
6:26 AM - 7:56 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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