Florida Keys: 78°F Water and Full Moon Align for Peak Tarpon Window

What's Biting

What's Next

The full moon's peak tidal amplitude carries into the next 48–72 hours before beginning to ease, making this weekend arguably the strongest remaining window in the current lunar cycle for tarpon on the flats. Moving tides — particularly outgoing stages — concentrate fish at channel mouths and flat edges. Plan to be positioned at first light while visibility is at its best; once boat traffic picks up mid-morning, clear-water shots at tailing or rolling fish become harder to come by.

Offshore, the 2.3-foot seas logged at buoy 41114 remain workable for center consoles and larger vessels targeting mahi-mahi and sailfish in the blue water beyond the reef line. Weed lines and color changes are the standard search grid for mahi in May — floating debris and surface bait concentrations are the tell. Saltwater Sportsman's recent breakdown of pitch-bait technique is worth reviewing before heading out: raising a sail or tuna on trolled teasers and then pitching a live bait to an already-fired-up fish consistently outperforms straight trolling when fish are visible and reactive.

Water temps appear stable in the upper 70s, which is also the sweet spot for permit on flat edges and permit bars where current funnels crustacean food sources. Bonefish should remain findable on shallow flats through the week, with the full-moon period typically producing larger daytime-active schools willing to chase a presentation.

Weekend anglers should time offshore runs to avoid the typical afternoon southeast wind build. Consult local marine forecasts and tide tables for your specific launch point — conditions diverge notably between the ocean side and Florida Bay side of the Keys, and tide timing differs by hours across the archipelago.

Context

Early May in the Florida Keys sits at the epicenter of the annual tarpon calendar. Water temperatures in the upper 70s — NOAA buoy 41114 recorded 78°F on April 26 — fall squarely within the historical range that concentrates migrating tarpon on the flats. The first full moon of May is a date long-time Keys guides circle months in advance; maximum tidal amplitude combined with favorable water temps and active bait presence creates some of the most predictable big-fish windows of the year.

For broader context, the Keys transition into summer patterns earlier than most of the Gulf coast. By mid-to-late May, daytime heat typically shifts tarpon action toward dawn and dusk sessions as fish drop into deeper water during midday. The current 78°F reading suggests the season is tracking on schedule — the prime daytime flats window likely has another two to three weeks before heat forces a meaningful tactical adjustment toward tide-edge and dawn timing.

Anglers Journal recently covered Florida's push for state management of Atlantic red snapper, a regulatory development worth monitoring if bottom fishing is on the itinerary. Season structure and bag limits may be in transition — check current FWC guidance before targeting snapper this spring.

No direct year-over-year comparison from Keys-based charter or tackle-shop sources is available in this reporting cycle, so the context above draws on regional seasonal patterns rather than firsthand local testimony. If conditions are running notably early or late, that signal will come from captains on the water — check in with local guides before making the run.