Ascension Bay Fly Fishing Seasons

Ascension Bay offers excellent saltwater fly fishing year-round for permit, bonefish, tarpon, and snook. Located within Mexico's Sian Ka'an Biosphere Reserve, the bay provides productive flats, mangrove shorelines, and backcountry waters in every season.

March through June is generally considered one of the best times to fly fish Ascension Bay, with excellent permit fishing, consistent bonefish opportunities, and the arrival of larger migratory tarpon. However, all four species can be targeted throughout the year, with summer offering opportunities for larger tarpon and fall and winter providing productive fishing with fewer visiting anglers.

Weather, tides, and wind conditions influence fishing opportunities throughout the year. Use our monthly fishing calendar below to compare the best seasons for each species and plan your Ascension Bay fly fishing trip.

Bonefish

Permit

Tarpon

Snook

What Is the Best Month for an Ascension Bay Grand Slam?

April through June offers some of the best opportunities for an Ascension Bay Grand Slam, catching a permit, bonefish, and tarpon in a single day.

These months combine prime permit and bonefish fishing with increasing tarpon activity, including the arrival of larger migratory fish.

However, all three species are present throughout the year, so a Grand Slam is possible in any season. Success depends on weather, tides, fishing conditions, and a little luck.

Ascension Bay fly fishing seasons by month for permit, tarpon, snook and bonefish.
Species	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Permit SIGHT FISHING	Good	Good	Prime	Prime	Prime	Prime	Very Good	Very Good	Very Good	Very Good	Good	Good
Tarpon BIG STRIKES	Good	Good	Very Good	Very Good	Prime	Prime	Prime	Prime	Prime	Very Good	Good	Good
Snook MANGROVES	Prime	Prime	Very Good	Very Good	Good	Good	Good	Good	Very Good	Very Good	Prime	Prime
Bonefish FLATS FISHING	Good	Good	Prime	Prime	Prime	Prime	Very Good	Very Good	Very Good	Very Good	Good	Good

Prime Peak seasonal opportunities

Very Good Excellent fishing potential

Good Productive year-round fishing

All four species can be targeted year-round in Ascension Bay. Seasonal ratings reflect typical fishing opportunities, not guaranteed catches.

Weather, tides, wind and water conditions affect fishing throughout the year. Our local guides adjust each trip to the conditions and your target species.

Bonefish — Prime Season: March through June
Ascension Bay offers excellent bonefish fishing year-round, with March through June providing some of the most consistent conditions for sight-fishing. Bonefish remain active throughout the warmer months, and productive fishing is possible during fall and winter.

Permit — Prime Season: March through June
Permit can be targeted year-round on Ascension Bay's shallow flats. March through June generally offers some of the best opportunities, while summer and fall can also produce excellent fishing. Weather, tides, and visibility play an important role in permit fishing success.

Tarpon — Prime Season: May through September
Resident tarpon are available throughout the year in Ascension Bay's mangrove lagoons and backcountry waters. Larger migratory tarpon typically arrive during the warmer months, providing exciting opportunities from late spring through summer and early fall.

Snook — Year-Round Fishing
Snook inhabit Ascension Bay's mangrove shorelines, channels, and backcountry waters throughout the year. Although they can be targeted in any season, fall and winter can offer particularly good opportunities when conditions are favorable.

Frequently Asked Questions About Ascension Bay Fishing Seasons

Can you fly fish Ascension Bay year-round?

Yes. Ascension Bay offers year-round fly fishing for permit, bonefish, resident tarpon, and snook. While certain months provide stronger opportunities for individual species, all four can be targeted throughout the year. Weather, tides, and water conditions influence fishing success.

When is the best time for permit fishing in Ascension Bay?

March through June is generally considered prime permit fishing season in Ascension Bay. However, permit are present year-round, with very good opportunities during summer and fall. Tides, wind, and water clarity often matter more than the month alone.

When do large migratory tarpon arrive in Ascension Bay?

Larger migratory tarpon generally begin arriving in late spring, with the strongest opportunities occurring during the warmer months from May through September. Smaller resident tarpon can be targeted year-round in the bay's mangrove lagoons and backcountry waters.

Does weather affect fly fishing in Ascension Bay?

Yes. Wind, tides, water temperature, and visibility can influence fishing throughout the year. Winter cold fronts may create windy conditions, while summer and fall can bring tropical rain and storms. Experienced local guides adjust fishing locations and target species according to the day's conditions.