Water Temperature of the Gulf of Mexico in Marathon, FL

Current Water Temperature

66.4°F

Measurement Time: Thursday, January 22, 2026, 10:18 AM EST

Today's Tides

 High: January 22, 3:19 AM, 0.7 ft
Low: January 22, 8:53 AM, -0.1 ft
 High: January 22, 4:27 PM, 0.5 ft
Low: January 22, 8:57 PM, 0.1 ft

Temperature Locations

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Local Points of Interest

Marathon Key; Vaca Key; Boot Key; Florida Keys

Gulf of Mexico

Station Name: Vaca Key, Florida Bay
Data Source: NOAA Tides and Currents

Elevation Above Sea Level: 20 feet

Sensor Depth: -3 feet

Nearest Address:
Palm Island Ave
Marathon, FL 33050
Monroe County

GPS Coordinates: 24.711000, -81.106500

Nearby Water Temperatures

Florida Bay, Islamorada, FL (25.7 mi)
Florida Bay, Islamorada, FL (26.7 mi)
Joe Kemp Channel, Flamingo, FL (29.2 mi)
East Side Creek, Flamingo, FL (29.5 mi)
Gulf of Mexico, Flamingo, FL (33 mi)
Whipray Basin, Islamorada, FL (34.1 mi)
Florida Bay, Islamorada, FL (34.5 mi)
Whitewater Bay, Flamingo, FL (37.5 mi)
Seven Palm Lake, Flamingo, FL (40 mi)
Little Madeira Bay, Homestead, FL (43.7 mi)
Taylor River, Homestead, FL (44.2 mi)
Shark River, Flamingo, FL (44.3 mi)
Florida Bay, Key Largo, FL (45.1 mi)
Taylor River, Homestead, FL (45.2 mi)
Gulf of Mexico, Key West, FL (45.4 mi)

Weather for Marathon, Florida

Current Weather

66.2°F
Overcast
Overcast
66.2°F
66.2°F
95%
NE 11.4 mph
20.4 mph
66.2°F
64.4°F
0 in
100%
9 mi
1020 mbar
3.3

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 71°F
L: 65°F
Fog
Fri
H: 66°F
L: 65°F
Overcast
Sat
H: 67°F
L: 64°F
Overcast
Sun
H: 72°F
L: 67°F
Patchy rain nearby
Mon
H: 72°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 6.45 μg/m3
PM10: 8.85 μg/m3
Carbon Monoxide: 121.85 μg/m3
Nitrogen Dioxide: 1.85 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:36 AM
Sunset: 6:03 PM
Daylight: 10 hrs 53 mins
Moonrise: 9:37 AM
Moon Transit: 3:39 PM
Moonset: 9:48 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.4%

Best Times for Fishing or Hunting

Major Periods

4:00 AM - 6:30 AM
3:09 PM - 5:39 PM

Minor Periods

9:18 PM - 10:48 PM
9:07 AM - 10:37 AM

Action Rating: 3 out of 5

Thursday, January 22, 2026

Weather Forecast

Patchy rain nearby
70.7°F
64.6°F
66.7°F
92%
0.05 in
80%
0%
15 mph
1.3


Air Quality

AQI: 1 - Good
PM2.5: 5.88 μg/m3
PM10: 8.21 μg/m3
Carbon Monoxide: 128.05 μg/m3
Nitrogen Dioxide: 3.26 μg/m3
Sulphur Dioxide: 1.62 μg/m3
Ozone: 81.84 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:36 AM
Sunset: 6:03 PM
Daylight: 10 hrs 53 mins
Moonrise: 9:37 AM
Moon Transit: 3:39 PM
Moonset: 9:48 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.4%

Best Times for Fishing or Hunting

Major Periods

4:00 AM - 6:30 AM
3:09 PM - 5:39 PM

Minor Periods

9:18 PM - 10:48 PM
9:07 AM - 10:37 AM

Action Rating: 3 out of 5

Friday, January 23, 2026

Weather Forecast

Fog
65.7°F
64.6°F
65.6°F
98%
0 in
0%
0%
10.7 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 4.93 μg/m3
PM10: 6.81 μg/m3
Carbon Monoxide: 123.61 μg/m3
Nitrogen Dioxide: 3.4 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 73.16 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:36 AM
Sunset: 6:03 PM
Daylight: 10 hrs 54 mins
Moonrise: 10:10 AM
Moon Transit: 9:54 AM
Moonset: 10:46 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

9:24 AM - 11:54 AM
9:24 AM - 11:54 AM

Minor Periods

10:16 PM - 11:46 PM
9:40 AM - 11:10 AM

Action Rating: 2 out of 5

Saturday, January 24, 2026

Weather Forecast

Overcast
66.7°F
63.5°F
65.2°F
98%
0 in
0%
0%
12.3 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 5.31 μg/m3
PM10: 7.35 μg/m3
Carbon Monoxide: 115.01 μg/m3
Nitrogen Dioxide: 3.97 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 67.84 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:36 AM
Sunset: 6:04 PM
Daylight: 10 hrs 55 mins
Moonrise: 10:43 AM
Moon Transit: 5:10 PM
Moonset: 11:45 PM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
4:40 PM - 7:10 PM

Minor Periods

12:00 AM - 12:00 AM
10:13 AM - 11:43 AM

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Overcast
72.2°F
66.6°F
68.6°F
96%
0 in
0%
0%
12.8 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 5.93 μg/m3
PM10: 8.81 μg/m3
Carbon Monoxide: 101.9 μg/m3
Nitrogen Dioxide: 1.64 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 64.2 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:36 AM
Sunset: 6:05 PM
Daylight: 10 hrs 56 mins
Moonrise: 11:19 AM
Moon Transit: 6:00 PM
Moonset: 12:45 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

6:18 AM - 8:48 AM
5:30 PM - 8:00 PM

Minor Periods

10:49 AM - 12:19 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, January 26, 2026

Weather Forecast

Patchy rain nearby
72.2°F
62.3°F
69.2°F
90%
0.02 in
78%
0%
31.5 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 6.21 μg/m3
PM10: 9.21 μg/m3
Carbon Monoxide: 110.67 μg/m3
Nitrogen Dioxide: 2.13 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 54.46 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:37 AM
Sunset: 6:06 PM
Daylight: 10 hrs 57 mins
Moonrise: 12:00 AM
Moon Transit: 6:53 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

7:09 AM - 9:39 AM
6:23 PM - 8:53 PM

Minor Periods

11:30 AM - 1:00 PM
12:18 AM - 1:48 AM

Action Rating: 4 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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