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

Current Water Temperature

90.1°F

Measurement Time: Thursday, September 10, 2026, 2:30 PM EDT

Today's Tides

Low: September 10, 3:09 AM, 0.5 ft
 High: September 10, 10:04 AM, 2.4 ft
Low: September 10, 4:04 PM, 0.4 ft
 High: September 10, 10:33 PM, 1.9 ft

Temperature Locations

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Local Points of Interest

Mallory Square; Tank Island; Florida Keys

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

91°F
Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
68%
SE 10 mph
79°F

Weather Forecast

Showers And Thunderstorms Likely
This Afternoon
91°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Tonight
82°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Friday
91°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Friday Night
82°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Saturday
91°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Saturday Night
82°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Sunday
91°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Sunday Night
83°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday
91°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday Night
83°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Tuesday
91°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Tuesday Night
82°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Wednesday
90°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Wednesday Night
82°F - Showers And Thunderstorms Likely

Astronomical

Sunrise: 7:12 AM
Sun Transit: 1:24 PM
Sunset: 7:36 PM
Daylight: 12 hrs 24 mins
Moonrise: 6:36 AM
Moon Transit: 1:01 PM
Moonset: 7:20 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:15 AM - 3:45 AM
12:31 AM - 3:01 PM

Minor Periods

6:50 PM - 8:20 PM
6:06 AM - 7:36 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 1:24 PM
Sunset: 7:36 PM
Daylight: 12 hrs 24 mins
Moonrise: 6:36 AM
Moon Transit: 1:01 PM
Moonset: 7:20 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:15 AM - 3:45 AM
12:31 AM - 3:01 PM

Minor Periods

6:50 PM - 8:20 PM
6:06 AM - 7:36 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 1:24 PM
Sunset: 7:36 PM
Daylight: 12 hrs 24 mins
Moonrise: 6:36 AM
Moon Transit: 1:01 PM
Moonset: 7:20 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

1:15 AM - 3:45 AM
12:31 AM - 3:01 PM

Minor Periods

6:50 PM - 8:20 PM
6:06 AM - 7:36 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 1:23 PM
Sunset: 7:35 PM
Daylight: 12 hrs 23 mins
Moonrise: 7:35 AM
Moon Transit: 1:47 PM
Moonset: 7:54 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
1:17 PM - 3:47 PM

Minor Periods

7:24 PM - 8:54 PM
7:05 AM - 8:35 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 1:23 PM
Sunset: 7:35 PM
Daylight: 12 hrs 23 mins
Moonrise: 7:35 AM
Moon Transit: 1:47 PM
Moonset: 7:54 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
1:17 PM - 3:47 PM

Minor Periods

7:24 PM - 8:54 PM
7:05 AM - 8:35 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 1:23 PM
Sunset: 7:34 PM
Daylight: 12 hrs 22 mins
Moonrise: 8:33 AM
Moon Transit: 2:32 PM
Moonset: 8:27 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
2:02 PM - 4:32 PM

Minor Periods

7:57 PM - 9:27 PM
8:03 AM - 9:33 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 1:23 PM
Sunset: 7:34 PM
Daylight: 12 hrs 22 mins
Moonrise: 8:33 AM
Moon Transit: 2:32 PM
Moonset: 8:27 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
2:02 PM - 4:32 PM

Minor Periods

7:57 PM - 9:27 PM
8:03 AM - 9:33 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:23 PM
Sunset: 7:33 PM
Daylight: 12 hrs 20 mins
Moonrise: 9:30 AM
Moon Transit: 3:18 PM
Moonset: 9:01 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
2:48 PM - 5:18 PM

Minor Periods

8:31 PM - 10:01 PM
9:00 AM - 10:30 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:23 PM
Sunset: 7:33 PM
Daylight: 12 hrs 20 mins
Moonrise: 9:30 AM
Moon Transit: 3:18 PM
Moonset: 9:01 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
2:48 PM - 5:18 PM

Minor Periods

8:31 PM - 10:01 PM
9:00 AM - 10:30 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:22 PM
Sunset: 7:32 PM
Daylight: 12 hrs 19 mins
Moonrise: 10:27 AM
Moon Transit: 4:04 PM
Moonset: 9:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
3:34 PM - 6:04 PM

Minor Periods

9:07 PM - 10:37 PM
9:57 AM - 11:27 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:22 PM
Sunset: 7:32 PM
Daylight: 12 hrs 19 mins
Moonrise: 10:27 AM
Moon Transit: 4:04 PM
Moonset: 9:37 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
3:34 PM - 6:04 PM

Minor Periods

9:07 PM - 10:37 PM
9:57 AM - 11:27 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:22 PM
Sunset: 7:31 PM
Daylight: 12 hrs 17 mins
Moonrise: 11:24 AM
Moon Transit: 4:51 PM
Moonset: 10:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

5:05 AM - 7:35 AM
4:21 PM - 6:51 PM

Minor Periods

9:46 PM - 11:16 PM
10:54 AM - 12:24 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:22 PM
Sunset: 7:31 PM
Daylight: 12 hrs 17 mins
Moonrise: 11:24 AM
Moon Transit: 4:51 PM
Moonset: 10:16 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

5:05 AM - 7:35 AM
4:21 PM - 6:51 PM

Minor Periods

9:46 PM - 11:16 PM
10:54 AM - 12:24 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 1:22 PM
Sunset: 7:30 PM
Daylight: 12 hrs 16 mins
Moonrise: 12:21 AM
Moon Transit: 5:40 PM
Moonset: 10:59 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

5:53 AM - 8:23 AM
5:10 PM - 7:40 PM

Minor Periods

10:29 PM - 11:59 PM
11:51 AM - 1:21 PM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 1:22 PM
Sunset: 7:30 PM
Daylight: 12 hrs 16 mins
Moonrise: 12:21 AM
Moon Transit: 5:40 PM
Moonset: 10:59 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

5:53 AM - 8:23 AM
5:10 PM - 7:40 PM

Minor Periods

10:29 PM - 11:59 PM
11:51 AM - 1:21 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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