The fly fishing season in Northern Patagonia runs from November 1 through May 31. Each period offers a distinct set of conditions and fishing styles — this guide helps you match your trip to your goals. For the full destination overview, see our complete guide to fly fishing in Northern Patagonia.
November and December: Spring
The season opens November 1 with aggressive, unpressured fish. Streamers are the primary technique early on. The dragonfly hatch begins in December on the lakes near San Martín de los Andes — one of the most exciting dry fly events of the entire season. November and early December are the least crowded months.
January and February: Peak Season
The height of summer. Water levels are lowest, temperatures warm, days long, and riverbanks full of beetles, ants, and hoppers. The classic Patagonian dry fly experience. See our fly selection guide for what to pack during this period. Most popular period — lodges book out months in advance and prices are highest.
March: The Transition
Summer crowds thin and fishing enters a new phase. Small mayfly and caddis hatches in the afternoons. Big brown trout move into pre-spawn feeding mode. Wind calmer than summer. Prices begin to drop and availability improves.
April: Fall
Poplars and willows turn gold and red. Trophy browns feeding aggressively before winter. Streamer fishing at its best. Lowest crowds and most competitive pricing of the season.
How to Choose
Best dry fly fishing: January or February. Uncrowded rivers and aggressive fish: November. Dragonfly hatch: mid-December through January. Trophy browns and fall scenery: March or April. Best value: November, April, or shoulder weeks in December and March. For detailed cost differences across months, see our cost guide.
A Note on Booking
Top guides and lodges for January and February fill 6 to 12 months in advance. For November, March, and April, availability is generally easier to find. For a more detailed month-by-month breakdown, see our season guide.