Water Temperature of the Gulf of Mexico in Marathon, FL

Current Water Temperature

86.7°F

Measurement Time: Friday, June 12, 2026, 6:42 AM EDT

Today's Tides

 High: June 12, 10:09 AM, 1.0 ft
Low: June 12, 5:27 PM, -0.2 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

80.1°F
Clear
Clear
85.1°F
88.6°F
85%
ENE 10.7 mph
14.2 mph
82.1°F
74.4°F
0 in
0%
9 mi
1015 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Fri
H: 86°F
L: 82°F
Partly Cloudy
Sat
H: 83°F
L: 82°F
Patchy rain nearby
Sun
H: 84°F
L: 82°F
Sunny
Mon
H: 84°F
L: 83°F
Patchy rain nearby
Tue
H: 84°F
L: 82°F

Air Quality

AQI: 1 - Good
PM2.5: 5.5 μg/m3
PM10: 8.7 μg/m3
Carbon Monoxide: 101 μg/m3
Nitrogen Dioxide: 0.8 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:24 PM
Sunset: 8:14 PM
Daylight: 13 hrs 39 mins
Moonrise: 3:56 AM
Moon Transit: 10:49 AM
Moonset: 5:49 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:19 PM - 6:49 PM
3:26 AM - 4:56 AM

Action Rating: 2 out of 5

Friday, June 12, 2026

Weather Forecast

Patchy rain nearby
86.4°F
82°F
83.5°F
74%
0.01 in
17%
0%
12.1 mph
3.4


Air Quality

AQI: 1 - Good
PM2.5: 5.74 μg/m3
PM10: 8.99 μg/m3
Carbon Monoxide: 100.96 μg/m3
Nitrogen Dioxide: 0.59 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 61.08 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:24 PM
Sunset: 8:14 PM
Daylight: 13 hrs 39 mins
Moonrise: 3:56 AM
Moon Transit: 10:49 AM
Moonset: 5:49 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:19 PM - 6:49 PM
3:26 AM - 4:56 AM

Action Rating: 2 out of 5

Saturday, June 13, 2026

Weather Forecast

Partly Cloudy
83.2°F
81.6°F
82.5°F
71%
0 in
9%
0%
9.8 mph
11.6


Air Quality

AQI: 1 - Good
PM2.5: 7.05 μg/m3
PM10: 10.7 μg/m3
Carbon Monoxide: 100.33 μg/m3
Nitrogen Dioxide: 0.54 μg/m3
Sulphur Dioxide: 0.49 μg/m3
Ozone: 62.29 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:24 PM
Sunset: 8:15 PM
Daylight: 13 hrs 39 mins
Moonrise: 4:45 AM
Moon Transit: 11:50 AM
Moonset: 7:01 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:03 AM - 2:33 AM
11:20 AM - 1:50 PM

Minor Periods

6:31 PM - 8:01 PM
4:15 AM - 5:45 AM

Action Rating: 3 out of 5

Sunday, June 14, 2026

Weather Forecast

Patchy rain nearby
83.7°F
82.3°F
83.1°F
72%
0.11 in
59%
0%
13.6 mph
11.4


Air Quality

AQI: 1 - Good
PM2.5: 5.35 μg/m3
PM10: 8.51 μg/m3
Carbon Monoxide: 97.79 μg/m3
Nitrogen Dioxide: 0.51 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 60.29 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:24 PM
Sunset: 8:15 PM
Daylight: 13 hrs 40 mins
Moonrise: 5:43 AM
Moon Transit: 12:56 AM
Moonset: 8:12 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

1:07 AM - 3:37 AM
12:26 AM - 2:56 PM

Minor Periods

7:42 PM - 9:12 PM
5:13 AM - 6:43 AM

Action Rating: 4 out of 5

Monday, June 15, 2026

Weather Forecast

Sunny
83.9°F
82.6°F
83.2°F
70%
0 in
7%
0%
13 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 5.95 μg/m3
PM10: 9.08 μg/m3
Carbon Monoxide: 107.03 μg/m3
Nitrogen Dioxide: 0.71 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 69.58 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 1:25 PM
Sunset: 8:15 PM
Daylight: 13 hrs 40 mins
Moonrise: 6:50 AM
Moon Transit: 2:04 PM
Moonset: 9:18 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

2:15 AM - 4:45 AM
1:34 PM - 4:04 PM

Minor Periods

8:48 PM - 10:18 PM
6:20 AM - 7:50 AM

Action Rating: 4 out of 5

Tuesday, June 16, 2026

Weather Forecast

Patchy rain nearby
84.3°F
82.3°F
83.4°F
71%
0.08 in
57%
0%
13.6 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 9.16 μg/m3
PM10: 13.76 μg/m3
Carbon Monoxide: 120.56 μg/m3
Nitrogen Dioxide: 1.08 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 73.44 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 1:25 PM
Sunset: 8:15 PM
Daylight: 13 hrs 40 mins
Moonrise: 8:00 AM
Moon Transit: 3:10 PM
Moonset: 10:16 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

3:22 AM - 5:52 AM
2:40 PM - 5:10 PM

Minor Periods

9:46 PM - 11:16 PM
7:30 AM - 9:00 AM

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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