Water Temperature of the Gulf of Mexico in Marathon, FL

Current Water Temperature

78.8°F

Measurement Time: Tuesday, March 3, 2026, 7:42 PM EST

Today's Tides

 High: March 3, 1:33 AM, 0.6 ft
Low: March 3, 6:09 AM, 0.0 ft
 High: March 3, 2:55 PM, 0.4 ft
Low: March 3, 6:09 PM, 0.0 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

75.9°F
Clear
Clear
79.7°F
79.8°F
82%
ENE 17.9 mph
24.9 mph
76°F
71.5°F
0 in
0%
9 mi
1020 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 77°F
L: 74°F
Cloudy
Wed
H: 75°F
L: 73°F
Overcast
Thu
H: 75°F
L: 73°F
Patchy rain nearby
Fri
H: 77°F
L: 73°F
Patchy rain nearby
Sat
H: 76°F
L: 75°F

Air Quality

AQI: 1 - Good
PM2.5: 5.15 μg/m3
PM10: 7.55 μg/m3
Carbon Monoxide: 100.85 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:36 AM
Sunset: 6:28 PM
Daylight: 11 hrs 43 mins
Moonrise: 6:53 PM
Moon Transit: 12:24 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:30 PM - 4:00 PM

Minor Periods

6:23 PM - 7:53 PM
6:17 AM - 7:47 AM

Action Rating: 5 out of 5

Tuesday, March 3, 2026

Weather Forecast

Sunny
77°F
74.3°F
75.6°F
80%
0 in
0%
0%
20.8 mph
1.9


Air Quality

AQI: 1 - Good
PM2.5: 4.88 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 104.25 μg/m3
Nitrogen Dioxide: 2.12 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 66.84 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:36 AM
Sunset: 6:28 PM
Daylight: 11 hrs 43 mins
Moonrise: 6:53 PM
Moon Transit: 12:24 AM
Moonset: 6:47 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:30 PM - 4:00 PM

Minor Periods

6:23 PM - 7:53 PM
6:17 AM - 7:47 AM

Action Rating: 5 out of 5

Wednesday, March 4, 2026

Weather Forecast

Cloudy
74.7°F
72.7°F
74°F
89%
0 in
0%
0%
20.8 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 5.19 μg/m3
PM10: 7.66 μg/m3
Carbon Monoxide: 103.45 μg/m3
Nitrogen Dioxide: 1.7 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 66.4 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:36 AM
Sunset: 6:29 PM
Daylight: 11 hrs 44 mins
Moonrise: 7:48 PM
Moon Transit: 1:08 AM
Moonset: 7:19 AM
Moon Phase: Full
Moon Illumination: 98.2%

Best Times for Fishing or Hunting

Major Periods

12:38 AM - 3:08 AM
2:13 PM - 4:43 PM

Minor Periods

7:18 PM - 8:48 PM
6:49 AM - 8:19 AM

Action Rating: 4 out of 5

Thursday, March 5, 2026

Weather Forecast

Overcast
75.4°F
72.5°F
73.8°F
91%
0 in
0%
0%
21 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 5.51 μg/m3
PM10: 8.23 μg/m3
Carbon Monoxide: 101.89 μg/m3
Nitrogen Dioxide: 1.5 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 65.08 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:35 AM
Sunset: 6:29 PM
Daylight: 11 hrs 46 mins
Moonrise: 8:43 PM
Moon Transit: 1:51 AM
Moonset: 7:50 AM
Moon Phase: Full
Moon Illumination: 94.0%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
2:56 PM - 5:26 PM

Minor Periods

8:13 PM - 9:43 PM
7:20 AM - 8:50 AM

Action Rating: 3 out of 5

Friday, March 6, 2026

Weather Forecast

Patchy rain nearby
76.6°F
73°F
74.7°F
88%
0.02 in
58%
0%
21.5 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 5.98 μg/m3
PM10: 9.07 μg/m3
Carbon Monoxide: 101.96 μg/m3
Nitrogen Dioxide: 1.39 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 60.32 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:35 AM
Sunset: 6:30 PM
Daylight: 11 hrs 47 mins
Moonrise: 9:37 PM
Moon Transit: 2:34 AM
Moonset: 8:22 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.6%

Best Times for Fishing or Hunting

Major Periods

2:04 AM - 4:34 AM
3:39 PM - 6:09 PM

Minor Periods

9:07 PM - 10:37 PM
7:52 AM - 9:22 AM

Action Rating: 3 out of 5

Saturday, March 7, 2026

Weather Forecast

Patchy rain nearby
75.6°F
75°F
75.3°F
84%
0.06 in
89%
0%
21.5 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 5.75 μg/m3
PM10: 8.66 μg/m3
Carbon Monoxide: 102.53 μg/m3
Nitrogen Dioxide: 1.58 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 61.62 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 12:35 AM
Sunset: 6:30 PM
Daylight: 11 hrs 49 mins
Moonrise: 10:32 PM
Moon Transit: 3:18 AM
Moonset: 8:55 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.2%

Best Times for Fishing or Hunting

Major Periods

2:48 AM - 5:18 AM
4:23 PM - 6:53 PM

Minor Periods

10:02 PM - 11:32 PM
8:25 AM - 9:55 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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