Cancún and Isla Mujeres Offshore (Mexico) Fishing Guide

Isla Mujeres and Cancún are known for winter-spring sailfish that crash bait balls of sardines, often marked by diving birds. White marlin show up in late spring, and blue marlin are possible. In summer the same waters fill with whale sharks, which are for viewing only.

📍 Cancún and Isla Mujeres, Quintana Roo, Mexico; fishing grounds north of Isla Mujeres toward Isla Contoy

📅 Mexico Caribbean Fishing Calendar — best months, closed seasons, bait & rigs →

Map: spots, ramps and marinas

★ Fishing hot spot · ● Boat ramp · ● Marina · ▭ Protected area (solid red = no fishing, dashed = fishing with rules)

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Quick facts

Isla Mujeres is about 10 miles from Cancún.
Winter and spring bring big schools of sailfish feeding on sardine bait balls; Marlin Magazine reports boats catching up to 100 sailfish in a day.
The productive offshore bite can be from about 10-15 miles out early in the season to 50 miles north of the island.
Whale shark season off Isla Mujeres runs about May 15 to September 17 under a management plan that allows up to 120 boats a day.
Mexican rules say anglers fishing from shore do not need a sport fishing permit.

What you can catch

Sailfish
Main event, about January to May; best around the full moon.
White marlin
Late spring, especially May and June.
Blue marlin
Possible, but the hardest billfish to find here.
Mahi-mahi (dorado)
Offshore catch on this coast.
Kingfish
Offshore catch on the Quintana Roo coast.
Yellowfin tuna
Offshore catch on the Quintana Roo coast.
Bottom fish (deep drop)
A backup when the sailfish are slow.

Month by month

January	Sailfish season starts; many visiting boats arrive.
February	Sailfish on bait balls; colder winters often mean better fishing.
March	Prime time for sailfish, with blue and white marlin mixed in.
April	Prime time; best bite around the full moon.
May	Sailfish can hold; white marlin season; whale sharks arrive mid-month.
June	White marlin; whale shark peak (viewing only).
July	Whale shark peak; hurricane season is on.
August	Whale sharks; hot weather, watch the tropics.
September	Whale shark season ends about Sept 17; peak hurricane season.
October	Off-season for billfish; check local reports.
November	Off-season for billfish; check local reports.
December	Visiting boats start arriving after Christmas for sailfish.

Tips

Look for diving birds - they usually mark the sardine bait balls and the sailfish.
Skip your bait right through the bait ball; baits off to the side get ignored.
The local fleet trolls dead baits (ballyhoo, split-tail mullet, squid) on circle hooks; Marlin Magazine reports live bait is not allowed.
Take turns on the bait balls and practice good sportsmanship with other boats.
Expect wind and 3-6 foot seas; it often helps the bite.

Rules and license

CONAPESCA (Comisión Nacional de Acuacultura y Pesca) · Official rules page ↗

Mexico's fishing regulation (Art. 86) says sport fishing can be done from shore, from a boat or underwater, and people fishing from shore do not need a permit.
Sport fishing permits are individual and cannot be transferred.
CONAPESCA sport fishing permits come in one-day, one-week, one-month, one-year and excursion versions; most charters help arrange them.
Whale sharks are for viewing and swimming only, with daily boat limits set under the management plan (CONANP and the Port Captain).

Rules change. Always check the official page before you fish.

Boat ramps and marinas

The map above shows 1 boat ramps and 4 marinas from OpenStreetMap. Tap any dot for directions.

Marina V&V
Marina del Rey
Marina del Sol
Puerto Isla Mujeres

Sources

Checked October 2026. BigJoe does not invent facts: every number on this page comes from the sources listed above.