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

Current Water Temperature

73.4°F

Measurement Time: Monday, February 23, 2026, 3:12 PM EST

Today's Tides

 High: February 23, 2:10 AM, 0.7 ft
Low: February 23, 6:45 AM, 0.2 ft
 High: February 23, 1:32 PM, 1.5 ft
Low: February 23, 8:45 PM, -0.4 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

63°F
Partly cloudy
Partly cloudy
63°F
59.7°F
56%
NNW 25.5 mph
29.3 mph
59.7°F
47°F
0 in
50%
9 mi
1021 mbar
4

Five Day Weather Forecast

Sunny
Mon
H: 62°F
L: 59°F
Sunny
Tue
H: 60°F
L: 55°F
Overcast
Wed
H: 68°F
L: 59°F
Patchy rain nearby
Thu
H: 75°F
L: 68°F
Patchy rain nearby
Fri
H: 77°F
L: 76°F

Air Quality

AQI: 1 - Good
PM2.5: 8.45 μg/m3
PM10: 12.55 μg/m3
Carbon Monoxide: 149.85 μg/m3
Nitrogen Dioxide: 1.15 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 110 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:40 AM
Sunset: 6:27 PM
Daylight: 11 hrs 32 mins
Moonrise: 10:47 AM
Moon Transit: 5:48 PM
Moonset: 12:49 AM
Moon Phase: First Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

5:58 AM - 8:28 AM
5:18 PM - 7:48 PM

Minor Periods

10:17 AM - 11:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Red Flag Warning issued February 22 at 6:23PM EST until February 23 at 7:00PM EST by NWS Miami FL

Effective: Sun February 22, 2026, 6:23 PM
Expires: Mon February 23, 2026, 7:00 PM

* AFFECTED AREA...Fire Weather Zone 068 Metro Palm Beach County, Fire Weather Zone 069 Coastal Collier County, Fire Weather Zone 071 Inland Broward County, Fire Weather Zone 072 Metro Broward County, Fire Weather Zone 073 Inland Miami-Dade County, Fire Weather Zone 074 Metropolitan Miami Dade, Fire Weather Zone 075 Mainland Monroe, Fire Weather Zone 163 Glades County Lake Region, Fire Weather Zone 166 Hendry County Lakes Region, Fire Weather Zone 167 Palm Beach County Lake Region, Fire Weather Zone 168 Coastal Palm Beach County, Fire Weather Zone 170 Big Cypress, Fire Weather Zone 172 Coastal Broward County, Fire Weather Zone 173 Coastal Miami Dade County, Fire Weather Zone 174 Far South Miami-Dade County, Fire Weather Zone 263 Glades County, Fire Weather Zone 266 Hendry County, Fire Weather Zone 267 Inland Palm Beach County, Fire Weather Zone 270 Northern Collier and Fire Weather Zone 370 Southwest Collier. * TIMING...From 9 AM to 7 PM EST Monday. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 24 percent. * TEMPERATURES...Up to 63.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued February 23 at 4:58AM EST until February 23 at 5:00PM EST by NWS Key West FL

Effective: Mon February 23, 2026, 4:58 AM
Expires: Mon February 23, 2026, 1:00 PM

The National Weather Service in Key West has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM this morning to 5 PM EST this afternoon. * AFFECTED AREA...Monroe Upper Keys. * TIMING...10 AM to 7 PM Monday. * WINDS...North 15 to 20 mph. * RELATIVE HUMIDITY...As low as 30 percent.

A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued February 23 at 9:50AM EST until February 23 at 5:00PM EST by NWS Key West FL

Effective: Mon February 23, 2026, 9:50 AM
Expires: Mon February 23, 2026, 5:00 PM

* AFFECTED AREA...Monroe Upper Keys. * TIMING...10 AM to 7 PM Monday. * WINDS...North 15 to 20 mph, gusts to 25 mph. * RELATIVE HUMIDITY...As low as 25 percent.

A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
Monday, February 23, 2026

Weather Forecast

Sunny
61.9°F
58.5°F
61.2°F
63%
0 in
0%
0%
30.9 mph
1.7


Air Quality

AQI: 1 - Good
PM2.5: 8.95 μg/m3
PM10: 12.69 μg/m3
Carbon Monoxide: 150.25 μg/m3
Nitrogen Dioxide: 1.73 μg/m3
Sulphur Dioxide: 2.1 μg/m3
Ozone: 108.68 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:40 AM
Sunset: 6:27 PM
Daylight: 11 hrs 32 mins
Moonrise: 10:47 AM
Moon Transit: 5:48 PM
Moonset: 12:49 AM
Moon Phase: First Quarter
Moon Illumination: 39.8%

Best Times for Fishing or Hunting

Major Periods

5:58 AM - 8:28 AM
5:18 PM - 7:48 PM

Minor Periods

10:17 AM - 11:47 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Tuesday, February 24, 2026

Weather Forecast

Sunny
60.1°F
55°F
57.3°F
72%
0 in
0%
0%
24.4 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 6.8 μg/m3
PM10: 9.65 μg/m3
Carbon Monoxide: 154.53 μg/m3
Nitrogen Dioxide: 1.43 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 106.8 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 12:40 AM
Sunset: 6:27 PM
Daylight: 11 hrs 33 mins
Moonrise: 11:38 AM
Moon Transit: 6:49 PM
Moonset: 12:56 AM
Moon Phase: First Quarter
Moon Illumination: 51.1%

Best Times for Fishing or Hunting

Major Periods

6:56 AM - 9:26 AM
6:19 PM - 8:49 PM

Minor Periods

11:08 AM - 12:38 AM
12:26 AM - 1:56 AM

Action Rating: 4 out of 5

Wednesday, February 25, 2026

Weather Forecast

Overcast
67.6°F
59°F
64.4°F
67%
0 in
0%
0%
17.9 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 6.39 μg/m3
PM10: 8.82 μg/m3
Carbon Monoxide: 148.65 μg/m3
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 113.96 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 12:40 AM
Sunset: 6:28 PM
Daylight: 11 hrs 35 mins
Moonrise: 12:37 AM
Moon Transit: 7:51 PM
Moonset: 2:03 AM
Moon Phase: First Quarter
Moon Illumination: 62.3%

Best Times for Fishing or Hunting

Major Periods

7:58 AM - 10:28 AM
7:21 PM - 9:51 PM

Minor Periods

12:07 AM - 1:37 PM
1:33 AM - 3:03 AM

Action Rating: 2 out of 5

Thursday, February 26, 2026

Weather Forecast

Patchy rain nearby
75.2°F
67.6°F
73.3°F
75%
0.02 in
88%
0%
20.1 mph
1.7


Air Quality

AQI: 1 - Good
PM2.5: 7.46 μg/m3
PM10: 10.61 μg/m3
Carbon Monoxide: 138.96 μg/m3
Nitrogen Dioxide: 1.29 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 102.44 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:40 AM
Sunset: 6:28 PM
Daylight: 11 hrs 36 mins
Moonrise: 1:41 PM
Moon Transit: 8:54 PM
Moonset: 3:06 AM
Moon Phase: First Quarter
Moon Illumination: 72.9%

Best Times for Fishing or Hunting

Major Periods

9:01 AM - 11:31 AM
8:24 PM - 10:54 PM

Minor Periods

1:11 PM - 2:41 PM
2:36 AM - 4:06 AM

Action Rating: 2 out of 5

Friday, February 27, 2026

Weather Forecast

Patchy rain nearby
76.9°F
75.5°F
76°F
83%
0.05 in
89%
0%
15.9 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.63 μg/m3
PM10: 11.47 μg/m3
Carbon Monoxide: 129.41 μg/m3
Nitrogen Dioxide: 1.83 μg/m3
Sulphur Dioxide: 1.14 μg/m3
Ozone: 80.08 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 12:39 AM
Sunset: 6:29 PM
Daylight: 11 hrs 37 mins
Moonrise: 2:48 PM
Moon Transit: 9:53 PM
Moonset: 4:04 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

10:02 AM - 12:32 AM
9:23 PM - 11:53 PM

Minor Periods

2:18 PM - 3:48 PM
3:34 AM - 5:04 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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