The Marathon, FL marine forecast covers live wind speed and gusts, tide predictions, wave conditions, and major and minor solunar feeding times, updated continuously from NOAA and Open-Meteo. The strongest fishing windows usually line up with the moving tide and the solunar periods shown below — check current conditions before you head out.
By Steve Wilson, lifelong angler & founder of My Marine Forecast
Last updated: Aug 1, 2026, 8:01 AM
On Saturday, August 1, Marathon, FL sees high tide at 5:03 AM (0.8 ft) and 4:01 PM (1.0 ft), low tide at 8:41 AM (0.5 ft) and 9:30 PM (0.3 ft). Winds 1–10 mph from the SE gusting to 13 mph. Air temperatures 81–91°F. Current water temperature is about 91°F. The strongest fishing windows line up with the moving water around each tide change, roughly an hour on either side.
Today's Tides · Station 8723970
| High tide | 5:03 AM | 0.8 ft |
| Low tide | 8:41 AM | 0.5 ft |
| High tide | 4:01 PM | 1.0 ft |
| Low tide | 9:30 PM | 0.3 ft |
Wind
1–10 mph SE
Gusts
13 mph
Air Temp
81–91°F
Water Temp
91°F
Tides from NOAA Station 8723970 · wind & temperature from Open-Meteo. Open the live forecast for hourly charts and the 7-day outlook.
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Tide data sourced from NOAA Station 8723970
Marathon sits in the heart of the Florida Keys, making it the perfect base for accessing both the Atlantic flats and the Gulf side shallows. The oceanside features dramatic coral reefs teeming with mutton snapper, yellowtail snapper, and grouper. The Gulf side backcountry offers hundreds of square miles of grass flats and mangrove channels holding bonefish, permit, and tarpon.
The Seven Mile Bridge area produces outstanding fishing for a wide range of species. Anglers jigging near the bridge pilings catch permit, cobia, and amberjack. At night, the bridge lights attract ballyhoo and other baitfish that draw large snook and tarpon. The nearby patch reefs are exceptional for snorkeling and spearfishing.
Offshore fishing from Marathon reaches the Hump — a famous deep-water seamount that concentrates blue marlin, tuna, and sailfish. The nutrient-rich waters around the Hump make it one of the most productive offshore spots in the Keys. Check the wind and wave forecasts above before making an offshore run to the Hump or Dry Tortugas.
Spring: Tarpon pour through the channels at the Seven Mile Bridge and nearby Bahia Honda from March into June, feeding on strong tides. Permit school over the wrecks for the spawn while singles tail across the flats on both sides of the island. Yellowtail on the reef and blackfin at the Hump round out the calendar.
Summer: Mahi runs offshore define summer, with fish on weedlines and birds from a few miles past the reef. Mangrove snapper spawn on the reef around summer full moons and bite well at night. Bonefish and permit feed on the oceanside flats early, and tarpon linger around the bridges into July.
Fall: Blackfin tuna gather over the Marathon Hump as bait moves through, and wahoo improve around the full moons into November. On the flats, bonefish and permit feed steadily in cooler, clearer water. The reef comes alive with yellowtail and mutton snapper, and the first fronts push Spanish mackerel onto Gulf-side patches.
Winter: Sailfish work the color changes off the reef edge from December through March. Kingfish and cero mackerel stack over the patch reefs and Gulf-side hard bottom, and the patches produce steady snapper, grouper and hogfish action on light tackle. Sharks and barracuda prowl the flats on the coldest days.
The old Seven Mile Bridge is the area's defining structure, and its channels are a proven tarpon fishery each spring. Sombrero Reef, a few miles off the oceanside, anchors the local reef fishing with snapper, grouper and hogfish around the light. The Marathon Hump offshore is the blackfin tuna spot, an underwater mountain that concentrates bait and pelagics. Closer to town, Vaca Cut funnels strong current between the Gulf and Atlantic sides, and Sombrero Beach offers easy public access on the oceanside for shore casting.