Why the Full Moon in May is Prime Time for Tarpon in Ascension Bay

For saltwater fly anglers, few experiences rival the heart-pounding thrill of chasing tarpon in the shallows of Ascension Bay. Known for its emerald flats, diverse fisheries, and consistent year-round action, Ascension Bay is already a bucket-list destination. But if you’re serious about connecting with the “Silver King,” timing your trip with the full moon in May can dramatically improve your odds.

Here’s why this window is so special:

The Annual Migration of Big Tarpon

Every spring, schools of large migratory tarpon begin their journey along the Yucatán Peninsula. By May, these fish are pushing into Ascension Bay, moving into shallow water where fly anglers can target them sight-casting. The full moon intensifies tidal movements, making it easier to intercept these big fish as they travel through predictable channels and flats.

Strong Tides Mean Stronger Feeding Windows

The gravitational pull of the full moon creates some of the strongest tides of the month. For tarpon, that means one thing: feeding. During these peak lunar cycles, tarpon move more aggressively on and off the flats, often giving anglers multiple shots in a single session. Morning and evening tides can line up perfectly with ideal light conditions, giving fly casters longer, more productive windows to hunt.

Consistency and Predictability

Unlike some fisheries where tarpon seem to appear and disappear without warning, Ascension Bay’s flats and channels funnel fish through very specific areas. Add the moon-driven tides, and these movements become even more predictable. Guides can use their local knowledge to put anglers exactly where tarpon are likely to appear – stacking the odds in your favor.

Perfect Weather for the Hunt

May is one of the sweet spots in the Caribbean fishing calendar. The weather is warm but not oppressively hot, trade winds are generally stable, and the rainy season hasn’t fully set in. That means more days of clear skies, calm water, and good visibility – critical factors when sight-casting to cruising tarpon.

The Full Moon Experience

Beyond the fishing itself, there’s something unforgettable about being on Ascension Bay under a brilliant full moon. Whether you’re enjoying a post-fishing dinner at the lodge, or watching the moonrise over the flats, the setting is nothing short of magical. It’s a bonus layer of experience that makes an already world-class trip even more memorable.

Opportunities Beyond Tarpon

While May is all about tarpon, Ascension Bay’s fishery offers a bonus: permit, bonefish, and snook are all present in good numbers. For anglers chasing a Grand Slam (tarpon, bonefish, and permit in a single day), this is prime time to take a shot at the ultimate fly fishing achievement.

Final Thoughts

Planning a tarpon trip to Ascension Bay is always a good idea, but planning it around the full moon in May can turn a good trip into an extraordinary one. With large migratory fish moving in, tidal swings working in your favor, and weather that sets the stage for sight-fishing perfection, it’s one of the most reliable times of year to put yourself in front of the Silver King.

If chasing tarpon is on your bucket list, circle May’s full moon on the calendar – you won’t regret it! You can also learn more + snag your spot on our upcoming hosted trip in 2026 here.