The question I get more than any other is exactly this one: “Andrés, when is the best time to come fish Patagonia?”
And the honest answer is that there isn’t a single right answer. It’s like asking which is the best Chilean wine — it depends on what you’re looking for, your experience level, and frankly, your patience with wind and your luck with weather.
I’ve spent over 20 years in this region. I’ve fished these rivers in every season, in great years and in difficult ones. So here’s the real version, without too much romanticizing.
One thing worth saying upfront: year to year, everything changes. Weather shifts, seasons move, and climate change is doing its part. In recent years it’s become harder to predict the patterns that used to be reliable. The biological rhythms — spawning runs, migrations — generally hold, but the weather today is a genuine unknown. You have to be willing to come and take what nature gives you. That unpredictability, paradoxically, is part of what makes Patagonia so special.
Season runs: October 12th through May 6th.
OCTOBER: WHEN THE MAGIC BEGINS
October is when the most enthusiastic anglers start moving — and for good reason. The Baker River is at its lowest point of the year, islands become accessible for wading, and rainbow trout are spawning out of the big lakes. That means sight fishing access to fish that are rarely this reachable. It’s spectacular — one of the most unique experiences the entire season has to offer.
That said, in October we focus exclusively on programs in the southern part of the region. The Coyhaique area isn’t at its best yet — the main rivers are typically affected by snowmelt — so we direct our attention to the Baker River and lake programs at Cerro Castillo, where conditions are more stable.
Weather in October is changeable and still cold, with temperatures hovering around 12–15°C. Layering is essential. The upside is that spring brings increasingly longer days, with more hours of good temperature to get the fish active.
Favorite programs:
- Baker River and special programs
- Cerro Castillo
NOVEMBER / DECEMBER: THE SEASON WAKES UP
November is a transition month. The first half still isn’t ideal for Coyhaique as a standalone destination — we remain focused on Cerro Castillo and the Baker River, which are more consistent at this time. But from mid-November onward, Coyhaique starts to shine. Rivers like the Mañihuales begin fishing consistently, and personally, I love this window for floating rivers at good water levels or fishing spring creeks out on the pampa.
The landscape in November changes dramatically. Patagonia blooms — lupins explode in color and transform the scenery into something that’s genuinely hard to describe.
December is one of our favorite months. The main rivers in the Coyhaique area start coming into shape, there are very few other anglers in the region, and the fish are active. It’s one of the hidden gems of the season. Depending on the year, wading may still be limited, but for boat fishing it’s an absolute luxury.
Favorite programs in November:
- Baker River (first half of the month)
- Cerro Castillo
- Coyhaique from mid-month, combined with other programs
Programs in December:
- Cerro Castillo
- Coyhaique
- Combined destination programs
- Cascadas Park on the Simpson River
JANUARY / FEBRUARY: PEAK SEASON
These are what we call peak season months for the Coyhaique area. The main rivers — the Simpson, the Ñirehuao — are at their finest. The odds of warm, sunny weather are the highest of the year.
By late January the grasshoppers arrive, and they stick around through all of February and even into March. That makes this the prime window for terrestrial dry fly fishing — one of the most rewarding experiences Patagonia has to offer. River levels have dropped, opening up wade fishing access to places that simply aren’t reachable earlier in the season.
During these months we don’t fish the Baker River — it runs in reverse, coming up high and colored from glacial melt. We concentrate on Coyhaique, Cerro Castillo, and combined programs.
February sees the highest volume of visiting anglers in the region. That’s not a negative, but worth knowing. It’s exactly why we recommend including Cerro Castillo in the program — access to lakes where we rarely encounter other fishermen.
Favorite programs:
- Coyhaique
- Cerro Castillo
- Combined programs
MARCH / APRIL: THE SECRET OF THOSE IN THE KNOW
This is where I smile.
March and April are the months fewest people choose — and they’re our favorites. The wind drops. The Patagonian autumn colors begin to appear, painting the landscape in reds and golds that are hard to forget. And the fishing takes on a completely different character.
Rivers are coming off their lowest levels of the season and beginning to rise with the first rains. Mayfly hatches intensify. By late March the Chinook salmon spawn begins — a spectacle in its own right — and with it come the vigorous rainbows that have been feeding on their eggs.
But what excites us most about this time of year is something else entirely: brown trout migrating toward their autumn spawning grounds. In specific locations, we find large fish traveling from the lakes into smaller rivers. It’s one of the few moments of the year when we have real access to fish that normally live in protected bodies of water like Lake General Carrera. If you’re chasing trophy trout, this is your window.
Temperatures run 8–15°C, rain becomes more frequent, days get shorter. It’s technical. It’s beautiful. It’s completely addictive. Some people call it “Patagonia in its purest form.” We just call it our favorite month.
Favorite programs:
- Coyhaique
- Cerro Castillo
- Lake General Carrera for trophy browns
MAY: THE LAST WINDOW
May runs through the 6th. It’s characterized by calmer days that allow access to big lakes like General Carrera. Temperatures drop, days shorten, but when the conditions cooperate, it can be absolutely extraordinary.
It’s the last opportunity of the year to chase trophy trout. For the brave — and for those who know that sometimes the best things come at the very end.
WHEN TO GO FISHING? THE TRUTH NO ONE TELLS YOU
There is no perfect month. Every period has its character, its advantages, and its variables. The key is knowing what you’re after.
First time in Patagonia? → December through February. Warmer weather, accessible conditions for all skill levels.
Looking for technical fishing? → March. Low, clear water, selective fish, and strong mayfly hatches.
Want big fish? → March–April for trophy browns. October for spawning rainbows. And at Cerro Castillo, we catch trophy fish throughout the entire season.
Prioritizing comfort? → January–February. Best odds of warm days, possibility of wet wading without waders. Also the busiest time of year on the water.
OUR HONEST RECOMMENDATION
If it’s your first trip: December, January, or February. Friendly weather, suitable conditions for every level, and terrestrial dry fly fishing at its peak.
If you’ve fished Patagonia before and want something different: October or March–April, depending on whether you’re after big spawning rainbows or autumn trophy browns.
WHAT YOU NEED TO KNOW ABOUT THE WEATHER
Patagonia is not predictable. The local saying goes that “you experience all four seasons in a single day.” It’s not an exaggeration — it’s accumulated experience.
Rain, sun, wind, snow — all of it can mix together within a few hours. Prepare for that and it won’t catch you off guard. In fact, over time, that unpredictability becomes part of the appeal.
What you should always bring:
- Breathable waders
- Layers — many of them
- A genuinely good rain jacket (not just anything)
- Felt-sole wading boots
- Sunscreen (UV in Patagonia is intense, even on overcast days)
Don’t fear the weather. This is Patagonia. It’s just how it is. And for reasons that are hard to put into words, once you start fishing here, you keep coming back.
READY TO COME?
If you already have a window in mind, let us know. We offer personalized programs for every month of the season — from flexible daily fishing to special expeditions in October or March.
Get in touch and we’ll find the program that fits exactly what you’re looking for.