Water Temperature of the Gulf of Mexico in Marathon, FL

Current Water Temperature

89.4°F

Measurement Time: Monday, August 31, 2026, 10:54 PM EDT

Today's Tides

 High: August 31, 4:04 AM, 1.1 ft
Low: August 31, 9:18 AM, 0.4 ft
 High: August 31, 5:05 PM, 1.0 ft
Low: August 31, 9:32 PM, 0.7 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

86°F
Slight Chance Showers And Thunderstorms
Slight Chance Showers And Thunderstorms
80%
E 5 mph
79°F

Weather Forecast

Slight Chance Showers And Thunderstorms
Tonight
82°F - Slight Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Tuesday
90°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Tuesday Night
82°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Wednesday
90°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Wednesday Night
82°F - Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers And Thunderstorms Likely
Thursday
89°F - Showers And Thunderstorms Likely
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Thursday Night
84°F - Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Friday
89°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Friday Night
84°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday
89°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Saturday Night
83°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Sunday
89°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Sunday Night
82°F - Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Labor Day
89°F - Chance Showers And Thunderstorms

Astronomical

Sunrise: 7:05 AM
Sun Transit: 1:24 PM
Sunset: 7:44 PM
Daylight: 12 hrs 39 mins
Moonrise: 9:49 PM
Moon Transit: 3:40 AM
Moonset: 10:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
4:47 PM - 7:17 PM

Minor Periods

9:19 PM - 10:49 PM
9:44 AM - 11:14 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: 7:05 AM
Sun Transit: 1:24 PM
Sunset: 7:44 PM
Daylight: 12 hrs 39 mins
Moonrise: 9:49 PM
Moon Transit: 3:40 AM
Moonset: 10:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.9%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
4:47 PM - 7:17 PM

Minor Periods

9:19 PM - 10:49 PM
9:44 AM - 11:14 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: 7:05 AM
Sun Transit: 1:24 PM
Sunset: 7:43 PM
Daylight: 12 hrs 37 mins
Moonrise: 10:28 PM
Moon Transit: 4:28 AM
Moonset: 11:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:58 AM - 6:28 AM
5:37 PM - 8:07 PM

Minor Periods

9:58 PM - 11:28 PM
10:44 AM - 12:14 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: 7:05 AM
Sun Transit: 1:24 PM
Sunset: 7:43 PM
Daylight: 12 hrs 37 mins
Moonrise: 10:28 PM
Moon Transit: 4:28 AM
Moonset: 11:14 AM
Moon Phase: Waning Gibbous
Moon Illumination: 71.2%

Best Times for Fishing or Hunting

Major Periods

3:58 AM - 6:28 AM
5:37 PM - 8:07 PM

Minor Periods

9:58 PM - 11:28 PM
10:44 AM - 12:14 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: 7:06 AM
Sun Transit: 1:24 PM
Sunset: 7:42 PM
Daylight: 12 hrs 36 mins
Moonrise: 11:13 PM
Moon Transit: 5:20 AM
Moonset: 12:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:50 AM - 7:20 AM
6:31 PM - 9:01 PM

Minor Periods

12:00 AM - 12:00 AM
11:49 AM - 1:19 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: 7:06 AM
Sun Transit: 1:24 PM
Sunset: 7:42 PM
Daylight: 12 hrs 36 mins
Moonrise: 11:13 PM
Moon Transit: 5:20 AM
Moonset: 12:19 AM
Moon Phase: Waning Gibbous
Moon Illumination: 60.5%

Best Times for Fishing or Hunting

Major Periods

4:50 AM - 7:20 AM
6:31 PM - 9:01 PM

Minor Periods

12:00 AM - 12:00 AM
11:49 AM - 1:19 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: 7:06 AM
Sun Transit: 1:23 PM
Sunset: 7:41 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:13 AM
Moon Transit: 6:16 AM
Moonset: 1:24 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:46 AM - 8:16 AM
7:30 PM - 10:00 PM

Minor Periods

12:54 AM - 2:24 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: 7:06 AM
Sun Transit: 1:23 PM
Sunset: 7:41 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:13 AM
Moon Transit: 6:16 AM
Moonset: 1:24 PM
Moon Phase: Last Quarter
Moon Illumination: 49.2%

Best Times for Fishing or Hunting

Major Periods

5:46 AM - 8:16 AM
7:30 PM - 10:00 PM

Minor Periods

12:54 AM - 2:24 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: 7:07 AM
Sun Transit: 1:23 PM
Sunset: 7:40 PM
Daylight: 12 hrs 33 mins
Moonrise: 12:06 AM
Moon Transit: 7:17 AM
Moonset: 2:31 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:47 AM - 9:17 AM
8:32 PM - 11:02 PM

Minor Periods

2:01 PM - 3:31 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: 7:07 AM
Sun Transit: 1:23 PM
Sunset: 7:40 PM
Daylight: 12 hrs 33 mins
Moonrise: 12:06 AM
Moon Transit: 7:17 AM
Moonset: 2:31 PM
Moon Phase: Last Quarter
Moon Illumination: 38.0%

Best Times for Fishing or Hunting

Major Periods

6:47 AM - 9:17 AM
8:32 PM - 11:02 PM

Minor Periods

2:01 PM - 3:31 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: 7:07 AM
Sun Transit: 1:23 PM
Sunset: 7:39 PM
Daylight: 12 hrs 32 mins
Moonrise: 1:05 AM
Moon Transit: 8:19 AM
Moonset: 3:33 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:49 AM - 10:19 AM
12:00 AM - 12:00 AM

Minor Periods

3:03 PM - 4:33 PM
12:35 AM - 2:05 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: 7:07 AM
Sun Transit: 1:23 PM
Sunset: 7:39 PM
Daylight: 12 hrs 32 mins
Moonrise: 1:05 AM
Moon Transit: 8:19 AM
Moonset: 3:33 PM
Moon Phase: Last Quarter
Moon Illumination: 27.4%

Best Times for Fishing or Hunting

Major Periods

7:49 AM - 10:19 AM
12:00 AM - 12:00 AM

Minor Periods

3:03 PM - 4:33 PM
12:35 AM - 2:05 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: 7:07 AM
Sun Transit: 1:22 PM
Sunset: 7:37 PM
Daylight: 12 hrs 30 mins
Moonrise: 2:11 AM
Moon Transit: 9:22 AM
Moonset: 4:31 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:52 AM - 11:22 AM
12:00 AM - 12:00 AM

Minor Periods

4:01 PM - 5:31 PM
1:41 AM - 3:11 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: 7:07 AM
Sun Transit: 1:22 PM
Sunset: 7:37 PM
Daylight: 12 hrs 30 mins
Moonrise: 2:11 AM
Moon Transit: 9:22 AM
Moonset: 4:31 PM
Moon Phase: Last Quarter
Moon Illumination: 18.0%

Best Times for Fishing or Hunting

Major Periods

8:52 AM - 11:22 AM
12:00 AM - 12:00 AM

Minor Periods

4:01 PM - 5:31 PM
1:41 AM - 3:11 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: 7:08 AM
Sun Transit: 1:22 PM
Sunset: 7:36 PM
Daylight: 12 hrs 29 mins
Moonrise: 3:18 AM
Moon Transit: 10:22 AM
Moonset: 5:20 PM
Moon Phase: Waning Crescent
Moon Illumination: 10.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:52 AM - 12:22 AM

Minor Periods

4:50 PM - 6:20 PM
2:48 AM - 4:18 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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