Water Temperature of Long Sound Near Key Largo, FL
Current Water Temperature
Measurement Time: Tuesday, October 21, 2025, 6:00 AM EDT
Temperature Locations
View Nearby Locations View All Florida Locations View Locations Near Me
Local Points of Interest
Little Blackwater Sound; Florida Bay; Barnes Sound; Florida Keys National Marine Sactuary; Everglades National Park; Florida Keys; Gulf of MexicoSponsored Content
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

Humidity: 93%
Feels Like: 81.5°F
Wind: ESE 11.6 mph
Wind Gusts: 16.7 mph
Precipitation: 0 in
Cloud Cover: 50%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast

Tue
H: 84°F
L: 78°F

Wed
H: 81°F
L: 78°F

Thu
H: 84°F
L: 78°F

Fri
H: 80°F
L: 79°F

Sat
H: 81°F
L: 79°F
Air Quality
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 88 μg/m3
Astronomical
Sun Transit: 1:06 PM
Sunset: 6:49 PM
Daylight: 11 hrs 26 mins
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 AM12:39 AM - 3:09 PM
Minor Periods
6:17 PM - 7:47 PM6:57 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.
Weather Forecast
Average Temperature: 79.9°F
Average Humidity: 87%
Wind: 13.4 mph
UV Index: 1.6
Air Quality
Nitrogen Dioxide: 2.06 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 84.88 μg/m3
Astronomical
Sun Transit: 1:06 PM
Sunset: 6:49 PM
Daylight: 11 hrs 26 mins
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 AM12:39 AM - 3:09 PM
Minor Periods
6:17 PM - 7:47 PM6:57 AM - 8:27 AM
Action Rating: 4 out of 5
Weather Forecast
Average Temperature: 79°F
Average Humidity: 86%
Wind: 17.9 mph
UV Index: 1.7
Air Quality
Nitrogen Dioxide: 2.98 μg/m3
Sulphur Dioxide: 1.41 μg/m3
Ozone: 84.12 μg/m3
Astronomical
Sun Transit: 1:06 PM
Sunset: 6:48 PM
Daylight: 11 hrs 25 mins
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 AM1:22 PM - 3:52 PM
Minor Periods
6:51 PM - 8:21 PM7:51 AM - 9:21 AM
Action Rating: 5 out of 5
Weather Forecast
Average Temperature: 79.5°F
Average Humidity: 77%
Wind: 22.8 mph
UV Index: 1.7
Air Quality
Nitrogen Dioxide: 3.91 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 79.92 μg/m3
Astronomical
Sun Transit: 1:06 PM
Sunset: 6:48 PM
Daylight: 11 hrs 23 mins
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 AM2:08 PM - 4:38 PM
Minor Periods
7:29 PM - 8:59 PM8:45 AM - 10:15 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 79.5°F
Average Humidity: 77%
Wind: 24.4 mph
UV Index: 0
Air Quality
Nitrogen Dioxide: 2.39 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 87.04 μg/m3
Astronomical
Sun Transit: 1:05 PM
Sunset: 6:47 PM
Daylight: 11 hrs 22 mins
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 AM2:56 PM - 5:26 PM
Minor Periods
8:11 PM - 9:41 PM9:40 AM - 11:10 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 79.8°F
Average Humidity: 78%
Wind: 25.9 mph
UV Index: 6
Air Quality
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 72.38 μg/m3
Astronomical
Sun Transit: 1:05 PM
Sunset: 6:46 PM
Daylight: 11 hrs 21 mins
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 AM3:47 PM - 6:17 PM
Minor Periods
8:59 PM - 10:29 PM10:35 AM - 12:05 AM
Action Rating: 4 out of 5