Every day we analyze satellite sea surface temperature imagery, chlorophyll and bait productivity data, surface current charts, and live NOAA marine forecasts to produce this report. The goal is to give you the clearest possible picture of what’s happening on the water before you book a trip or leave the dock.
Conditions move fast in the Keys. Currents shift, bait schools move, and thermal breaks appear and disappear overnight. A report from two days ago isn’t worth much. We try to update this report daily to make sure you have the most up to date info.
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How to read this report
- Sea surface temperature (SST): Warmer water along the reef corridor (76–80°F) keeps reef fish active and feeding. Cold intrusions from the Gulf side can slow shallow-water species like tarpon early in the morning.
- Chlorophyll / bait productivity: High chlorophyll readings along the reef line mean bait is stacked. This often means yellowtail, mangrove snapper, cobia and others are close behind.
- Surface currents: Moderate Gulf Stream flow past the 408 Hump and Marathon West Hump creates ideal conditions for mahi, blackfin tuna, and wahoo. Slack current along the reef is better for anchoring and chumming.
- Wind and seas: Under 15 knots and seas under 3 feet puts all our trips in play. Anything above that and we focus on protected reef and backcountry options.
Upcoming Fishing Conditions
7/5/2026
Overview
Marathon Fishing Prediction — Sunday, July 5, 2026
Overall Fishing Grade: 79/100 (Very Good) — Flat-calm holiday Sunday with a loaded reef line and a clean offshore edge; the fish are there, but heat, crowds, and a fading tide make timing everything.
Conditions Snapshot (peak hours 6 AM – 6 PM EDT)
- Sunrise 6:39 AM • Sunset 8:18 PM
- Wind: SE 5–10 kt, light and gentle
- Seas: 1–2 ft, slick to low chop
- Water temp: reef ~87°F, backcountry ~90°F, offshore ~85–86°F
- Tides (Vaca Cut): High 6:10 AM (0.7 ft) • Low 10:45 AM (0.4 ft) • High 5:43 PM (0.8 ft) • Low 11:26 PM (0.1 ft) — range ~0.7 ft, modest and fading
- Moon: Waning gibbous ~72%, moonrise ~11 PM
- Solunar: Major near first light (~4:30–6:30 AM), Minor ~10:30 AM–12:00 PM — average quality in daylight
- Barometer: ~30.06 in, steady/slightly high
Why This Grade
This is a get-out-early, pick-your-window day. Flat seas and light southeast breeze open every zone — you can run the edge or work the reef with equal ease — but three things keep this a strong Very Good rather than a lights-out day: the tide range is fading toward the back side of the full moon, so moving water is gentle; the barometer is high and steady with no front to trigger a feed; and the holiday-weekend crowd will stack the reef and sandbars by mid-morning.
The water itself is telling a clean story. A rich chlorophyll band is sitting right on the reef line, holding bait and feeding the snapper bite, while the water turns clean and blue as you push offshore. Where that green reef water meets the blue, and where the Gulf Stream current tightens along the edge about a dozen miles off, is where the pelagic play sets up. Up in the backcountry, the shallows are running near 90°F — that heat shuts the flats down by mid-morning, so the backcountry is strictly a first-light game today.
Zone-by-Zone Game Plan
- Reef & Structure (30–120 ft): The strongest, most reliable, most accessible bite. Chum the reef line hard at first light for yellowtail and mangrove before the heat and the crowd build; longer fluorocarbon leaders earn their keep as the slick stretches on the moving water. Drop deeper structure and wrecks (90–120 ft) for mutton and grouper (open season). Beat the traffic — the earlier you anchor, the better.
- Backcountry & Bridges: A dawn-only proposition. Work bridges and cuts on the early outgoing for tarpon (release) and shade structure for snook (release); check wrecks and channel edges for permit (release). Once the sun climbs and that 90°F shallow water heats up, the bite goes cold — plan to be reef-bound or headed offshore by mid-morning.
- Offshore (run ~12 NM to the edge SE of Sombrero): Calm seas make the run easy. Work the color break where green meets clean blue and the current tightens; troll weed and debris lines for mahi, and work the humps for blackfin. Fish have been running deep, so cover water and lean on the temp and color seams rather than sitting in one spot.
Recent Local Catch Signal
Honest read: light and largely unconfirmed today. Verifiable fresh local reports were thin, so these scores lean on season, live conditions, and the satellite read rather than a flood of dock evidence. The reef and offshore pattern is consistent with a normal, productive early-July setup; flats and coastal are scored on conditions with lower confidence. Absence of posts is not absence of fish.
Species Forecast
| Species | Score | Technique | Location | Notes |
|---|---|---|---|---|
| Yellowtail Snapper | 84 | Chum/light leader | reef line 40–90 ft | Chlorophyll band is holding bait right on the reef; first-light slick before the crowd is the play. |
| Mahi-Mahi | 83 | Troll weed/debris lines | edge ~12 NM | Clean blue and a tightening current edge make the run worth it; watch temp/color seams as fish are running deep. |
| Mangrove Snapper | 80 | Live bait/patch reefs | 20–60 ft | Warm water and calm seas favor structure; low-light and moving-water windows fish best. |
| Blackfin Tuna | 74 | Vertical jigs/trolling | humps & edge | Strong current on the humps sets up; best odds early before the sun gets high. |
| Mutton Snapper | 70 | Live bait on bottom | 60–120 ft | Post-full-moon push is easing but deeper structure still holds fish on moving water. |
| Grouper (OPEN!) | 66 | Live/dead bait | wrecks & ledges 90–120 ft | Open season; anchor deeper structure and fish the tide change. |
| Permit (RELEASE) | 66 | Crab on wrecks/channel edges | Light wind and clean visibility help; weaker current caps it. Handle and release. | |
| Tarpon (RELEASE) | 58 | Bridges & cuts on the outgoing | Late-season fish still around; dawn/dusk on moving water is the window. Release. | |
| King/Spanish Mackerel | 56 | Flatlines/flash near bait & channels | Secondary; work bait schools and reef edges. Calm helps spotting. | |
| Bonefish (RELEASE) | 55 | Sight-fish flats at first light | Calm visibility is good but midday heat shuts it down; go early. Release. | |
| Snook (RELEASE) | 52 | Structure/shade, low light | Summer presence around bridges and mangroves; not a lead target today. Release. | |
| Wahoo | 46 | High-speed troll the edge | Off-season side bet; a bonus fish, not a target. | |
| Sailfish | 26 | Incidental only | Wrong season; a rare surprise on the troll. |
Best Bite Windows
- 6:00–8:30 AM — First light + morning high sliding to the outgoing; coolest water before the heat. Best all-around window. ★★★★
- 2:00–5:00 PM — Afternoon flood building toward the 5:43 PM high; watch for building storms. ★★★
- 5:00–6:30 PM — Late-day high and evening cool-down; strong if the storms hold off. ★★★
Safety & Notes
- No Small Craft Advisory — seas 1–2 ft.
- Isolated to scattered afternoon thunderstorms are likely (typical holiday-weekend summer pattern) — keep an eye on the sky by early afternoon and have an exit plan.
- Expect heavy July 4th-weekend boat traffic on the reef, channels, and sandbars: idle the crowded zones, watch for divers-down flags, and give anchored boats room.
- Very warm day — hydrate and cover up.
Links & Deals
- Daily conditions: https://captainhooks.com/daily-fishing-conditions-marathon-fl/
- Book a charter: https://captainhooks.rezdy.com/catalog/66597/fishing-charters
- 🎣 MFP Reel Deal: Gina and Ryan W. run the Reel Deal at the bait register. Mention it when you’re in and they’ll set you up with today’s discount.
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What to Expect When Fishing in Marathon, FL
Marathon sits at the heart of the Florida Keys, with easy access to the Atlantic reef tract to the south and Florida Bay to the north. That geography gives anglers access to three completely different fisheries within a short run of the dock. Try offshore bluewater, nearshore reef and wreck, and shallow backcountry flats.
Offshore fishing
The Gulf Stream runs close to the Keys year-round, pushing warm, clean bluewater within 15–20 miles of Marathon. Offshore structure like the 408 Hump and Marathon West Hump concentrate baitfish and attract pelagics in numbers that few places on the East Coast can match. Mahi-mahi are the bread-and-butter species spring through summer, with blackfin tuna and wahoo filling the box on the right day.
Reef and wreck fishing
The Florida Keys reef tract is one of the most productive fishing grounds in North America. Yellowtail snapper and mangrove snapper are on the reef virtually every day of the year. Mutton snapper and cobia show up in numbers during spring. Expect action from grouper (when in season), amberjack, cero mackerel, and barracuda.
Backcountry and flats fishing
Florida Bay and the grass flats north of Marathon are some of the best tarpon and bonefish water in the world. Tarpon migrate through the Keys from April through July in serious numbers. Permit, snook, and redfish round out the backcountry offering.
Seasonal fishing guide for Marathon, FL
- Winter (Dec–Feb): Yellowtail and mangrove snapper fire up in cooler water. Sailfish peak offshore. Calm weather windows make for excellent bottom fishing days.
- Spring (Mar–May): The best all-around season. Mahi arrive in force by March. Cobia move through the reef. Tarpon migration kicks off in April.
- Summer (Jun–Aug): Mahi, tuna, and wahoo offshore. Consistent reef fishing. Morning trips are the move before afternoon thunderstorms build.
- Fall (Sep–Nov): Kingfish move in. Reef fishing stays strong. Cooler temps and lighter crowds make fall an underrated time to fish the Keys.
Bait, tackle, and trip planning
Our Marathon bait and tackle shop carries fresh, live, and frozen bait along with everything you need for a day on the water. For a fully guided experience, our Marathon fishing charters cover all three fisheries. Also fishing out of Big Pine Key if that puts you closer to the action.
Marathon • Big
Pine Key • Key West
Ready to Fish?
Charters run daily. Reef, offshore, and flats. Book online or give us a call.