Water Temperature of Long Sound Near Key Largo, FL

Current Water Temperature

85.1°F 29.5°C
Warm Warm & Relaxing
85.1°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Water feels warm and inviting. Safe for extended immersion with virtually no thermal fatigue.

Measurement Time: Friday, November 13, 2026, 6:00 AM EST

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

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)

Marine Weather for Long Sound Near Key Largo, FL

Marine Weather

Coastal & Marine Conditions
Open-Meteo Marine
0.4ft 0.1 m
Calm / Flat Smooth waters with minimal wave motion.
Wave Period 2.8s
Wave Direction 137° SE
Swell Waves
0.3 ft
2.7s • 121° ESE
Wind Waves / Chop
0.1 ft
1.4s • 315° NW
Ocean Current
0.1 mph
0.1 kn • 90° E
Sea Surface Temp
82.2°F
Equivalent: 27.9°C

High & Low Tide Forecast

Rising (Flood)
Next Tide: High 12:00 PM (+0.0 ft)
0.0 ft (MSL) Thu, Nov 12 12 AM 6 AM 12 PM 6 PM 12 AM 6 AM Fri, Nov 13 Sat, Nov 14 ▲ High 8:00 PM +0.2 ft ▼ Low 5:00 AM -1.4 ft ▲ High 12:00 PM +0.0 ft ▼ Low 5:00 PM -0.8 ft ▲ High 9:00 PM +0.1 ft ▼ Low 6:00 AM -1.4 ft NOW
High Tide Thu, Nov 12
8:00 PM
+0.2 ft (0.05 m)
Low Tide Fri, Nov 13
5:00 AM
-1.4 ft (-0.42 m)
High Tide Fri, Nov 13
12:00 PM
+0.0 ft (-0.01 m)
Low Tide Fri, Nov 13
5:00 PM
-0.8 ft (-0.25 m)
Open-Meteo Tidal Model (Mean Sea Level MSL datum) • Times in station local timezone.

5-Day Marine Wave Forecast

Today
Nov 13
0.9 ft
3s • S
Sat
Nov 14
1.2 ft
3.5s • NNE
Sun
Nov 15
1.7 ft
3.3s • NE
Mon
Nov 16
3.0 ft
4.3s • ENE
Tue
Nov 17
3.3 ft
5s • E

Weather Near Key Largo, Florida

Current Weather

80.1°F
Sunny
Conditions: Sunny
Humidity: 62%
Feels Like: 85.8°F
Wind: WNW 2.4 mph
Wind Gusts: 8.7 mph
Pressure: 29.84 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 17.6 mi
UV Index: 4.2

Five-Day Weather Forecast

Overcast
Fri
H: 84°F
L: 66°F
Overcast
Sat
H: 76°F
L: 59°F
Overcast
Sun
H: 77°F
L: 58°F
Light Drizzle
Mon
H: 78°F
L: 69°F
Light Drizzle
Tue
H: 79°F
L: 74°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
9.7 μg/m³
Good
PM10
13.2 μg/m³
Good
Ozone (O3)
81 μg/m³
Photochemical
NO2
1.7 μg/m³
Nitrogen Dioxide
SO2
1.3 μg/m³
Sulfur Dioxide
CO
119 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 57m daylight
Sunrise 6:38 AM
Solar Noon 12:06 PM
Sunset 5:34 PM
Moon
Waxing Crescent • 13%
Moonrise 10:29 AM
Transit 3:43 PM
Moonset 9:00 PM

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:13 PM - 5:43 PM

Minor Periods

9:59 AM - 11:29 AM
8:30 PM - 10:00 PM
Action Rating:
Good Action 3/5
Friday, November 13, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 75.4°F
Average Humidity: 71%
Chance of Rain: 17%
Wind: 12.5 mph
UV Index: 5.4

Air Quality

EPA Index 1 • Good
PM2.5
7.7 μg/m³
Good
PM10
10 μg/m³
Good
Ozone (O3)
79.2 μg/m³
Photochemical
NO2
2.3 μg/m³
Nitrogen Dioxide
SO2
1 μg/m³
Sulfur Dioxide
CO
123.5 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 57m daylight
Sunrise 6:38 AM
Solar Noon 12:06 PM
Sunset 5:34 PM
Moon
Waxing Crescent • 13%
Moonrise 10:29 AM
Transit 3:43 PM
Moonset 9:00 PM

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
3:13 PM - 5:43 PM

Minor Periods

9:59 AM - 11:29 AM
8:30 PM - 10:00 PM
Action Rating:
Good Action 3/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 66.4°F
Average Humidity: 57%
Chance of Rain: 0%
Wind: 11.8 mph
UV Index: 5.9

Air Quality

EPA Index 2 • Moderate
PM2.5
6.8 μg/m³
Good
PM10
8.4 μg/m³
Good
Ozone (O3)
93.8 μg/m³
Photochemical
NO2
2.7 μg/m³
Nitrogen Dioxide
SO2
0.9 μg/m³
Sulfur Dioxide
CO
139.9 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 55m daylight
Sunrise 6:38 AM
Solar Noon 12:06 PM
Sunset 5:34 PM
Moon
Waxing Crescent • 21%
Moonrise 11:12 AM
Transit 4:32 PM
Moonset 9:55 PM

Best Times for Fishing or Hunting

Major Periods

3:37 AM - 6:07 AM
4:02 PM - 6:32 PM

Minor Periods

10:42 AM - 12:12 PM
9:25 PM - 10:55 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 68°F
Average Humidity: 61%
Chance of Rain: 1%
Wind: 15.5 mph
UV Index: 5.3

Air Quality

EPA Index 1 • Good
PM2.5
7.2 μg/m³
Good
PM10
9.8 μg/m³
Good
Ozone (O3)
82.3 μg/m³
Photochemical
NO2
4.2 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
125.1 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 54m daylight
Sunrise 6:39 AM
Solar Noon 12:06 PM
Sunset 5:34 PM
Moon
Waxing Crescent • 31%
Moonrise 11:51 AM
Transit 5:18 PM
Moonset 10:50 PM

Best Times for Fishing or Hunting

Major Periods

4:25 AM - 6:55 AM
4:48 PM - 7:18 PM

Minor Periods

11:21 AM - 12:51 PM
10:20 PM - 11:50 PM
Action Rating:
Good Action 3/5
Monday, November 16, 2026

Weather Forecast

Conditions: Light Drizzle
Average Temperature: 73.8°F
Average Humidity: 63%
Chance of Rain: 10%
Wind: 21 mph
UV Index: 5.7

Air Quality

EPA Index 1 • Good
PM2.5
6.3 μg/m³
Good
PM10
10.2 μg/m³
Good
Ozone (O3)
93.3 μg/m³
Photochemical
NO2
1 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
116.1 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 53m daylight
Sunrise 6:40 AM
Solar Noon 12:06 PM
Sunset 5:33 PM
Moon
First Quarter • 42%
Moonrise 12:27 PM
Transit 6:02 PM
Moonset 11:44 PM

Best Times for Fishing or Hunting

Major Periods

5:10 AM - 7:40 AM
5:32 PM - 8:02 PM

Minor Periods

11:57 AM - 1:27 PM
11:14 PM - 12:44 AM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Light Drizzle
Average Temperature: 75.9°F
Average Humidity: 69%
Chance of Rain: 32%
Wind: 20.8 mph
UV Index: 4.2

Air Quality

EPA Index 1 • Good
PM2.5
6.1 μg/m³
Good
PM10
10.2 μg/m³
Good
Ozone (O3)
91 μg/m³
Photochemical
NO2
1 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
113.4 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 52m daylight
Sunrise 6:41 AM
Solar Noon 12:06 PM
Sunset 5:33 PM
Moon
First Quarter • 54%
Moonrise 12:59 PM
Transit 6:45 PM
Moonset 1:24 AM

Best Times for Fishing or Hunting

Major Periods

5:54 AM - 8:24 AM
6:15 PM - 8:45 PM

Minor Periods

12:54 AM - 2:24 AM
12:29 PM - 1:59 PM
Action Rating:
Fair Action 2/5
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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