The Big Picture
Tamarindo's fishing breaks into two main seasons driven by water temperature, currents, and baitfish migration — but unlike many destinations, the transition between seasons means you're never really in a dead zone.
December – April
The sailfish explosion. Cooler, nutrient-rich water pushes in from the north. Massive bait balls attract sailfish in numbers that rival anywhere on the planet. Also prime time for mahi-mahi, wahoo, and inshore roosterfish.
Weather: Sunny, minimal rain, light winds. Perfect boat conditions.
Pricing: Peak season — book 3-4 weeks ahead. Charter prices at their highest.
May – November
The marlin migration. Warmer, blue water moves in. Blue marlin, striped marlin, and yellowfin tuna become the main targets. The offshore fishing can be spectacular — fewer boats, bigger fish.
Weather: Morning sun, afternoon rain showers. Slightly rougher water on some days.
Pricing: 20-30% lower charter rates. Easier to book last-minute.
Month-by-Month Breakdown
What's biting, what the water's doing, and what to expect each month.
December – February
The best sailfish fishing on the planet. This is when Tamarindo earns its reputation. Boats regularly release 10-20+ sailfish per day during peak weeks. The water is clean, blue-green, and loaded with bait.
Target species:
- 🔥 Sailfish — PEAK. Multiple hookups per trip is the norm.
- 🔥 Mahi-mahi (Dorado) — Excellent. Big bulls around floating debris.
- 🟢 Wahoo — Good. High-speed trolling near structure.
- 🟢 Roosterfish — Good inshore. Live bait along the beaches.
- 🟡 Marlin — Occasional. More consistent later in the season.
Water temp: 78-82°F | Seas: Calm to moderate
March – April
The crossover months. Sailfish action remains strong through March and tapers in April. Meanwhile, the water starts warming and the first blue marlin of the season begin showing up. Some of the most diverse fishing of the year.
Target species:
- 🔥 Sailfish — Still excellent in March. Good in April.
- 🔥 Mahi-mahi — Peak. Big fish, frequent catches.
- 🟢 Blue Marlin — Starting to show. Getting better each week.
- 🟢 Yellowfin Tuna — Starting to appear in numbers.
- 🟢 Roosterfish — Excellent inshore. Some of the biggest of the year.
Water temp: 80-84°F | Seas: Calm. Best boat conditions of the year.
May – July
Marlin season ignites. The warm, blue water is fully established. Blue marlin, striped marlin, and big yellowfin tuna take over the offshore scene. This is the time for bucket-list fish.
Target species:
- 🔥 Blue Marlin — PEAK. Fish over 400 lbs possible.
- 🔥 Striped Marlin — Good to excellent.
- 🔥 Yellowfin Tuna — PEAK. Schools of 50-200+ lb fish.
- 🟢 Mahi-mahi — Still good, especially early.
- 🟢 Roosterfish — Consistent inshore.
- 🟡 Sailfish — Numbers drop but still present.
Water temp: 82-86°F | Seas: Generally calm mornings, can build in afternoon
Pro tip: Charter prices drop 20-30%. You get world-class fishing at green season rates.
August – September
The "secret season." Locals know these months can produce some of the best offshore fishing of the year. Fewer boats on the water means less pressure. The marlin and tuna bite can be exceptional.
Target species:
- 🔥 Blue Marlin — Still strong. Some of the biggest fish of the year.
- 🔥 Yellowfin Tuna — Excellent. Feeding aggressively.
- 🟢 Wahoo — Good. Showing up more consistently.
- 🟢 Mahi-mahi — Moderate. Scattered but catchable.
- 🟢 Snook — Excellent inshore. River mouths producing.
Water temp: 84-86°F | Weather: Rainier, but mornings are usually clear. Fish don't care about rain.
October – November
The second crossover. Water starts cooling, currents shift, and the first sailfish of the new season begin arriving. Marlin are still around. Inshore fishing picks up dramatically with the rains pushing baitfish into the estuaries.
Target species:
- 🟢 Sailfish — Returning. Numbers build weekly through November.
- 🟢 Marlin — Still catchable, especially early October.
- 🔥 Snook — PEAK. Rain-swollen rivers create perfect conditions.
- 🟢 Roosterfish — Good inshore. Active along the beaches.
- 🟡 Yellowfin Tuna — Tapering but still present.
Water temp: 80-84°F | Value: Best charter deals of the year. Shoulder season pricing with improving action.
Quick Species Calendar
At a glance — when each species peaks in Tamarindo waters.
⛵ Sailfish
🔥 Peak: Dec – Mar
🟢 Good: Apr, Nov
🟡 Present: May – Oct
🐋 Blue Marlin
🔥 Peak: May – Sep
🟢 Good: Apr, Oct
🟡 Occasional: Nov – Mar
🐟 Yellowfin Tuna
🔥 Peak: May – Aug
🟢 Good: Sep – Oct
🟡 Scattered: Nov – Apr
🌈 Mahi-Mahi
🔥 Peak: Dec – Apr
🟢 Good: May – Jun
🟡 Present: Jul – Nov
🐓 Roosterfish
🔥 Peak: Mar – May, Oct – Nov
🟢 Good: Year-round inshore
🐺 Snook
🔥 Peak: Sep – Nov (rainy season)
🟢 Good: Jun – Aug
🟡 Quiet: Dec – May
When to Book for Value vs. Action
March – April
Sailfish still biting, marlin arriving, best weather, calm seas, roosterfish going off inshore. The most diverse fishing month with reasonable availability.
May – June
Marlin and tuna peak at green season prices. Charter rates drop 20-30%. Fewer boats, less competition, world-class fishing. The smart play.
January – February
Sailfish numbers at their absolute peak. 15-20+ releases per boat is possible. Premium pricing and need to book well ahead — but the action is unreal.
Seasonality FAQ
Is there a bad time to fish Tamarindo?
Honestly, no. Even the "slowest" months (October) still produce consistent catches. The species mix changes, but there's always something biting. That's the beauty of tropical fishing — no winter shutdown.
Does rain ruin fishing?
Not at all. Green season rain typically falls in the afternoon — mornings are clear. And rain actually improves inshore fishing by pushing baitfish out of the rivers. Fish don't care if it's raining. You might get wet, but you'll catch fish.
Are tournaments worth planning around?
Tamarindo hosts several tournaments throughout the year (Presidential Challenge, FECOP events). They're fun to watch but mean more boats on the water. If you're not competing, book your trip around tournament dates rather than during them.
Can I target a specific species?
Absolutely. Tell your captain what you're after when booking. They'll plan the trip timing, location, and techniques around your target. Want sailfish? Book Dec-Mar. Want marlin? May-Sep. Want roosterfish? Anytime, but best Mar-May.