Water Temperature of the Gulf of Mexico in Key West, FL

Current Water Temperature

82.9°F 28.3°C
Warm Warm & Relaxing
82.9°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: Monday, November 9, 2026, 1:36 PM EST

Temperature Locations

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Local Points of Interest

Mallory Square; Tank Island; Florida Keys

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Gulf of Mexico

Station Name: Key West
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 13 feet

Sensor Depth: -4 feet

Nearest Address:
21 Angela St
Key West, FL 33040
Monroe County

GPS Coordinates: 24.55083, -81.80806

Nearby Water Temperatures

Atlantic Ocean, Key West, FL (14.1 mi)
Gulf of Mexico, Marathon, FL (45.4 mi)
East Side Creek, Flamingo, FL (61.8 mi)
Joe Kemp Channel, Flamingo, FL (66.5 mi)
Florida Bay, Islamorada, FL (68.4 mi)
Shark River, Flamingo, FL (70.9 mi)
Florida Bay, Islamorada, FL (71.3 mi)
Whitewater Bay, Flamingo, FL (72 mi)
Gulf of Mexico, Flamingo, FL (72.6 mi)
Whipray Basin, Islamorada, FL (76.3 mi)
Harney River, Flamingo, FL (76.4 mi)
Florida Bay, Islamorada, FL (78 mi)
Seven Palm Lake, Flamingo, FL (80.5 mi)
Broad River, Flamingo, FL (82.1 mi)
Little Madeira Bay, Homestead, FL (85.4 mi)

Weather for Key West, Florida

Current Weather

80.8°F
Sunny
Conditions: Sunny
Humidity: 68%
Feels Like: 84°F
Wind: E 6 mph
Wind Gusts: 8 mph
Pressure: 30.03 in
Precipitation: 0 in
Cloud Cover: 6%
Visibility: 6 mi
UV Index: 6.9

Weather Forecast

Sunny
Mon
H: 81°F
L: 79°F
Patchy rain nearby
Tue
H: 81°F
L: 80°F
Patchy rain nearby
Wed
H: 80°F
L: 80°F

Air Quality

EPA Index 1 • Good

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

PM2.5
7.2 μg/m³
Good
PM10
11.2 μg/m³
Good
Ozone (O3)
88 μg/m³
Photochemical
NO2
0.4 μg/m³
Nitrogen Dioxide
SO2
0.9 μg/m³
Sulfur Dioxide
CO
137 μg/m³
Carbon Monoxide

Astronomical

Sun
11h 3m daylight
Sunrise 6:39 AM
Solar Noon 12:11 PM
Sunset 5:43 PM
Moon
New • 2%
Moonrise 6:59 AM
Transit 12:25 PM
Moonset 5:49 PM

Best Times for Fishing or Hunting

Major Periods

11:55 AM - 2:25 PM
11:31 PM - 2:01 AM

Minor Periods

6:29 AM - 7:59 AM
5:19 PM - 6:49 PM
Action Rating:
Peak Action 5/5

Coastal Flood Statement issued November 9 at 4:20AM EST until November 9 at 5:00PM EST by NWS Key West FL

Effective: Mon November 9, 2026, 4:20 AM
Expires: Mon November 9, 2026, 5:00 PM

* WHAT...Minor saltwater flooding. * WHERE...The Florida Keys. * WHEN...Through this afternoon. * 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.


Monday, November 9, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 80.1°F
Average Humidity: 72%
Chance of Rain: 36%
Wind: 9.6 mph
UV Index: 7

Astronomical

Sun
11h 3m daylight
Sunrise 6:39 AM
Solar Noon 12:11 PM
Sunset 5:43 PM
Moon
New • 2%
Moonrise 6:59 AM
Transit 12:25 PM
Moonset 5:49 PM

Best Times for Fishing or Hunting

Major Periods

11:55 AM - 2:25 PM
11:31 PM - 2:01 AM

Minor Periods

6:29 AM - 7:59 AM
5:19 PM - 6:49 PM
Action Rating:
Peak Action 5/5
Tuesday, November 10, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 80.1°F
Average Humidity: 73%
Chance of Rain: 43%
Wind: 13.9 mph
UV Index: 6.5

Astronomical

Sun
11h 2m daylight
Sunrise 6:40 AM
Solar Noon 12:11 PM
Sunset 5:42 PM
Moon
New • 0%
Moonrise 7:55 AM
Transit 1:15 PM
Moonset 6:33 PM

Best Times for Fishing or Hunting

Major Periods

12:20 AM - 2:50 AM
12:45 PM - 3:15 PM

Minor Periods

7:25 AM - 8:55 AM
6:03 PM - 7:33 PM
Action Rating:
Very Good 4/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 79.9°F
Average Humidity: 75%
Chance of Rain: 71%
Wind: 13.2 mph
UV Index: 6.3

Astronomical

Sun
11h 1m daylight
Sunrise 6:41 AM
Solar Noon 12:11 PM
Sunset 5:42 PM
Moon
New • 2%
Moonrise 8:51 AM
Transit 2:06 PM
Moonset 7:21 PM

Best Times for Fishing or Hunting

Major Periods

1:10 AM - 3:40 AM
1:36 PM - 4:06 PM

Minor Periods

8:21 AM - 9:51 AM
6:51 PM - 8:21 PM
Action Rating:
Good Action 3/5
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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