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

Current Water Temperature

85.1°F

Measurement Time: Wednesday, September 30, 2026, 9:30 PM EDT

Today's Tides

 High: September 30, 12:12 AM, 2.4 ft
Low: September 30, 6:51 AM, 0.2 ft
 High: September 30, 1:41 PM, 1.6 ft
Low: September 30, 6:08 PM, 0.9 ft

Temperature Locations

View Nearby Locations     View All Florida Locations     View Locations Near Me

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

82°F
Showers And Thunderstorms
Showers And Thunderstorms
82%
E 15 mph
76°F

Weather Forecast

Showers And Thunderstorms
Tonight
78°F - Showers And Thunderstorms
Showers And Thunderstorms
Thursday
88°F - Showers And Thunderstorms
Showers And Thunderstorms
Thursday Night
79°F - Showers And Thunderstorms
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Friday
89°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Friday Night
80°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday
89°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday Night
81°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Sunday
88°F - Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
Sunday Night
81°F - Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers
Monday
88°F - Slight Chance Rain Showers
Slight Chance Showers And Thunderstorms
Monday Night
80°F - Slight Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Tuesday
87°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Tuesday Night
79°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Wednesday
87°F - Chance Showers And Thunderstorms

Astronomical

Sunrise: 7:19 AM
Sun Transit: 1:17 PM
Sunset: 7:15 PM
Daylight: 11 hrs 56 mins
Moonrise: 10:05 PM
Moon Transit: 4:14 AM
Moonset: 11:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:44 AM - 6:14 AM
5:21 PM - 7:51 PM

Minor Periods

9:35 PM - 11:05 PM
10:49 AM - 12:19 AM

Action Rating: 2 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: 7:19 AM
Sun Transit: 1:17 PM
Sunset: 7:15 PM
Daylight: 11 hrs 56 mins
Moonrise: 10:05 PM
Moon Transit: 4:14 AM
Moonset: 11:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:44 AM - 6:14 AM
5:21 PM - 7:51 PM

Minor Periods

9:35 PM - 11:05 PM
10:49 AM - 12:19 AM

Action Rating: 2 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: 7:19 AM
Sun Transit: 1:16 PM
Sunset: 7:14 PM
Daylight: 11 hrs 55 mins
Moonrise: 11:03 PM
Moon Transit: 5:14 AM
Moonset: 12:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:44 AM - 7:14 AM
6:23 PM - 8:53 PM

Minor Periods

12:00 AM - 12:00 AM
11:56 AM - 1:26 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: 7:19 AM
Sun Transit: 1:16 PM
Sunset: 7:14 PM
Daylight: 11 hrs 55 mins
Moonrise: 11:03 PM
Moon Transit: 5:14 AM
Moonset: 12:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.3%

Best Times for Fishing or Hunting

Major Periods

4:44 AM - 7:14 AM
6:23 PM - 8:53 PM

Minor Periods

12:00 AM - 12:00 AM
11:56 AM - 1:26 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: 7:19 AM
Sun Transit: 1:16 PM
Sunset: 7:13 PM
Daylight: 11 hrs 53 mins
Moonrise: 12:03 AM
Moon Transit: 6:16 AM
Moonset: 1:30 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:46 AM - 8:16 AM
7:26 PM - 9:56 PM

Minor Periods

1:00 PM - 2:30 PM
12:00 AM - 12:00 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: 7:19 AM
Sun Transit: 1:16 PM
Sunset: 7:13 PM
Daylight: 11 hrs 53 mins
Moonrise: 12:03 AM
Moon Transit: 6:16 AM
Moonset: 1:30 PM
Moon Phase: Last Quarter
Moon Illumination: 55.3%

Best Times for Fishing or Hunting

Major Periods

5:46 AM - 8:16 AM
7:26 PM - 9:56 PM

Minor Periods

1:00 PM - 2:30 PM
12:00 AM - 12:00 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: 7:20 AM
Sun Transit: 1:16 PM
Sunset: 7:12 PM
Daylight: 11 hrs 52 mins
Moonrise: 12:07 AM
Moon Transit: 7:19 AM
Moonset: 2:29 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:49 AM - 9:19 AM
8:28 PM - 10:58 PM

Minor Periods

1:59 PM - 3:29 PM
12:00 AM - 12:00 AM

Action Rating: 2 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: 7:20 AM
Sun Transit: 1:16 PM
Sunset: 7:12 PM
Daylight: 11 hrs 52 mins
Moonrise: 12:07 AM
Moon Transit: 7:19 AM
Moonset: 2:29 PM
Moon Phase: Last Quarter
Moon Illumination: 43.9%

Best Times for Fishing or Hunting

Major Periods

6:49 AM - 9:19 AM
8:28 PM - 10:58 PM

Minor Periods

1:59 PM - 3:29 PM
12:00 AM - 12:00 AM

Action Rating: 2 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: 7:20 AM
Sun Transit: 1:15 PM
Sunset: 7:11 PM
Daylight: 11 hrs 51 mins
Moonrise: 1:13 AM
Moon Transit: 8:19 AM
Moonset: 3:20 PM
Moon Phase: Last Quarter
Moon Illumination: 32.9%

Best Times for Fishing or Hunting

Major Periods

7:49 AM - 10:19 AM
9:25 PM - 11:55 PM

Minor Periods

2:50 PM - 4:20 PM
12:43 AM - 2:13 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: 7:20 AM
Sun Transit: 1:15 PM
Sunset: 7:11 PM
Daylight: 11 hrs 51 mins
Moonrise: 1:13 AM
Moon Transit: 8:19 AM
Moonset: 3:20 PM
Moon Phase: Last Quarter
Moon Illumination: 32.9%

Best Times for Fishing or Hunting

Major Periods

7:49 AM - 10:19 AM
9:25 PM - 11:55 PM

Minor Periods

2:50 PM - 4:20 PM
12:43 AM - 2:13 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: 7:21 AM
Sun Transit: 1:15 PM
Sunset: 7:10 PM
Daylight: 11 hrs 49 mins
Moonrise: 2:20 AM
Moon Transit: 9:15 AM
Moonset: 4:05 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
12:00 AM - 12:00 AM

Minor Periods

3:35 PM - 5:05 PM
1:50 AM - 3:20 AM

Action Rating: 2 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: 7:21 AM
Sun Transit: 1:15 PM
Sunset: 7:10 PM
Daylight: 11 hrs 49 mins
Moonrise: 2:20 AM
Moon Transit: 9:15 AM
Moonset: 4:05 PM
Moon Phase: Last Quarter
Moon Illumination: 22.8%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
12:00 AM - 12:00 AM

Minor Periods

3:35 PM - 5:05 PM
1:50 AM - 3:20 AM

Action Rating: 2 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: 7:21 AM
Sun Transit: 1:15 PM
Sunset: 7:09 PM
Daylight: 11 hrs 48 mins
Moonrise: 3:24 AM
Moon Transit: 10:07 AM
Moonset: 4:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

4:14 PM - 5:44 PM
2:54 AM - 4:24 AM

Action Rating: 2 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: 7:21 AM
Sun Transit: 1:15 PM
Sunset: 7:09 PM
Daylight: 11 hrs 48 mins
Moonrise: 3:24 AM
Moon Transit: 10:07 AM
Moonset: 4:44 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.1%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

4:14 PM - 5:44 PM
2:54 AM - 4:24 AM

Action Rating: 2 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: 7:21 AM
Sun Transit: 1:15 PM
Sunset: 7:08 PM
Daylight: 11 hrs 46 mins
Moonrise: 4:25 AM
Moon Transit: 10:55 AM
Moonset: 5:19 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:25 AM - 12:55 AM

Minor Periods

4:49 PM - 6:19 PM
3:55 AM - 5:25 AM

Action Rating: 2 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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