Costa Rica’s green season, from May through November, is one of the most misunderstood times to visit. Many travelers assume that the rainy months mean poor fishing conditions, but in reality, it’s quite the opposite. The green season delivers some of the most productive and diverse fishing of the entire year. Offshore, the waters come alive with yellowfin tuna, marlin, and mahi-mahi, while inshore anglers find roosterfish and snapper feeding aggressively along the coast.
For those who prefer fewer tourists, lower charter demand, and thriving marine life, this is a golden window. Whether you’re launching from Los Sueños, Jaco, Quepos, or Flamingo, the action in Costa Rica’s Pacific never really slows down; it just shifts species.
Understanding the Green Season
The term “green season” refers to Costa Rica’s rainy months, typically starting in May and running through November. While there are afternoon showers, mornings are often calm and clear, perfect for early departures. The rainfall actually fuels the fishing: nutrient-rich runoff from the land creates blooms of plankton, attracting baitfish that in turn draw in larger predators.
Offshore waters are warm, averaging 80–84°F (26–29°C), while surface current lines become rich feeding zones for tuna, dorado, and marlin. Closer to shore, murky estuary outflows concentrate small bait and shrimp, giving roosterfish, snook, and snapper plenty to hunt. As a result, almost every major species available in the dry season can be caught during the green months, often in greater numbers.
Offshore Fishing: Tuna, Dorado, and Marlin
Offshore fishing during the green season is spectacular. While the dry months are famous for sailfish, the rainy period is known for variety and abundance. The calm early mornings and cloud-filtered skies make for comfortable full-day charters, and it’s not unusual for anglers to see feeding frenzies within 20–40 miles offshore.
Yellowfin Tuna
The star of the green season is the yellowfin tuna. From May through October, massive schools appear along current lines and temperature breaks, often feeding alongside pods of spinner dolphins. Boats follow the birds, dolphins, and whitewater explosions to find the fish. Tuna in Costa Rica range from 20-pound schoolies to 200-pound brutes that test even the strongest gear.
Tuna fishing is typically visual and fast-paced. Captains use poppers, stickbaits, or live bait to trigger surface strikes. Some boats even deploy kites or slow-troll live bonito for larger fish. It’s one of the most exciting fisheries in the Pacific and one of the main reasons serious anglers love Costa Rica’s rainy months.
Dorado (Mahi-Mahi)
As rain pushes debris out to sea, floating logs, branches, and sargassum mats form natural fish aggregators. These become a perfect habitat for mahi-mahi, which can be found under almost every piece of structure from July onward. The dorado bite peaks from October to December but starts ramping up strongly by mid-summer.
Dorado are surface feeders, easily spotted by their electric-green flashes as they chase bait. Light tackle and spinning rods make this one of the most fun species to target. Their abundance also makes them perfect for family trips, as the action can be non-stop once a floating log is located.
Marlin
While sailfish move slightly north during the green season, marlin dominate the deepwater scene. Blue marlin and black marlin feed aggressively along seamounts and current edges. These are prime months for FAD fishing and overnight expeditions that reach untouched offshore zones.
From June through October, the FAD and seamount grounds deliver record numbers of marlin encounters. Multi-day charters out of Los Sueños or Quepos often raise multiple marlin a day, with opportunities for both blue and black species, sometimes even the rare grand slam that includes a striped marlin and sailfish. These trips combine the adventure of deep-sea exploration with the comfort of live-aboard accommodations and professional crews.
Inshore Fishing: Roosterfish and Snapper
Inshore fishing thrives during the green season. Rain brings nutrients into coastal ecosystems, fueling bait concentrations around river mouths and reefs. The slightly stained water gives predatory fish like roosterfish and snapper a hunting advantage, making them far more aggressive.
Roosterfish
From May through November, roosterfish action is red-hot along the Central and Southern Pacific coasts. These powerful inshore predators thrive in moderate surf and cloudy water, especially around points and estuary mouths. Los Sueños, Herradura, Quepos, and Golfito are among the best locations to find them.
Live baiting with blue runners or lookdowns near rocky shorelines produces consistent bites. Many anglers also enjoy sight-fishing with poppers or stickbaits when roosters chase sardines to the surface. The fight is unmatched, with long runs and dramatic head shakes as the fish’s signature comb slices through the water.
Snapper and Grouper
Bottom species also peak in the green season. Cubera snapper, mutton snapper, and various grouper species move shallow to feed on crustaceans and smaller fish. The combination of overcast skies and slightly rougher seas keeps boat pressure low, allowing these reef dwellers to feed more actively.
Anglers use live bait, jigs, or deep-dropping rigs to target these powerful bottom fish. It’s also a productive way to fish when offshore conditions are choppy. Snapper and grouper are not only thrilling to catch, but they’re also some of the best table fare available in Costa Rica.
Regional Highlights During the Green Season
Los Sueños and Jaco
The Central Pacific remains one of the most reliable fishing zones in the country. From May through November, boats from Los Sueños Marina and Jaco Beach encounter large schools of tuna, dorado, and marlin just 20–40 miles offshore. Closer to shore, roosterfish and snapper are dependable targets for half-day charters. The blend of offshore and inshore varieties makes this region perfect for anglers seeking action in any weather.
Quepos and Manuel Antonio
Quepos offers a mix of bluewater and nearshore options, especially during the rainy season. Tuna and dorado dominate the offshore bite, while inshore anglers can target roosterfish, jacks, and snappers. The marina’s protected location makes it a safe and convenient base during the wetter months.
Northern Pacific: Flamingo and Papagayo
While the north experiences less rain overall, the fishing remains excellent. Offshore waters produce big dorado, tuna, and marlin through September. Papagayo and Flamingo captains often report wahoo along drop-offs during May and June, adding to the green season variety.
Southern Pacific: Golfito and Osa Peninsula
The southern coast is known for calm mornings and productive offshore currents even deep into the rainy season. Tuna schools pass close to shore, and the reefs are loaded with snapper and roosterfish. Many anglers consider Golfito’s green season one of Costa Rica’s best-kept secrets for serious fishing, with few boats around.
FAD and Overnight Opportunities
Some of Costa Rica’s most exciting offshore fishing happens far from land, and the green season is ideal for long-range trips. FAD fishing and overnight expeditions are at their peak between June and October. These multi-day charters reach deepwater seamounts where marlin, tuna, and dorado feed in massive concentrations. Calm nights, stunning sunrises, and incredible action make them a must for anglers seeking the ultimate adventure.
Weather and Travel Tips
- Fishing windows: Most charters depart early (6:00–7:00 a.m.) to take advantage of the calmest hours. Showers typically arrive in the afternoon, once you’re back at the dock.
- Reduced crowds: With fewer tourists, anglers enjoy better availability and sometimes discounted rates on boats and accommodations.
- Ideal length: Plan for at least two or three days of fishing to allow flexibility around weather and tides.
- Stay near the marina: Los Sueños, Flamingo, and Quepos all have excellent hotels and resorts within minutes of the docks, keeping logistics simple.
Why Fish Costa Rica in the Green Season
The green season offers the perfect blend of action, value, and scenery. Lush rainforests are at their most vibrant, wildlife tours are quieter, and the ocean teems with life. While the dry season may get the headlines, many captains agree that May through November provides the most consistent mix of species and size offshore.
Plan Your Green Season Adventure
There’s never a bad time to fish in Costa Rica, but if you want fewer crowds, exciting mixed-bag fishing, and unbeatable value, the green season is hard to beat. Check the Costa Rica Fishing Calendar for month-by-month patterns, explore Offshore Fishing in Costa Rica for full-day charters, or plan an overnight FAD expedition for a shot at giant marlin and tuna.
Ready to experience the action? Book your green season fishing trip with the Costa Rica Fishing Experts and discover why the rainy months are secretly some of the best fishing months of the year.
