Panama sits closer to the equator than its neighbours and it is narrower, and both facts show up in the weather. The country has two rain calendars that do not agree, and a visitor who plans around one of them will meet the other.
The two calendars
The Pacific side, which includes Panama City, the Azuero peninsula and the Pearl Islands. Dry season runs roughly from mid-December to April. Outside it, clear mornings and afternoon storms.
The Caribbean side, which includes Bocas del Toro at 161,3 nautical miles and Guna Yala at 81,1. It rains here in most months, with two drier windows — around February and March, and again in September and October.
That second window is the useful fact. September and October are the wettest weeks on the Pacific and among the better ones on the Caribbean, so a trip in those months is not a bad trip; it is a trip that should go to the other coast.
And the western highlands around David at 174,4 nautical miles do their own thing: cooler, wetter than the lowlands below them, and prone to the fine drizzle Panamanians call bajareque, which is not rain exactly and is not sun either.
Month by month, roughly
December to March. The Pacific dry season. Reliable sun, the highest prices, the most visitors, and steady trade winds that matter if you are getting on a boat.
April. Still dry, hottest month, and the end of the season in the city.
May and June. The rains arrive as afternoon storms with clear mornings. Green, quiet and cheaper.
July and August. A partial break in the Pacific rains, and a wet stretch on the Caribbean.
September and October. Wettest on the Pacific, drier on the Caribbean. The inversion above.
November. The wettest month in much of the country, and the one to be most careful with. Early December often recovers.
The wind nobody mentions
From December to March the trade winds blow hard on the Caribbean side, and they are the reason a perfect forecast can still mean a rough boat crossing to the San Blas islands.
It is dry-season weather producing a wet-season problem, which catches people out because they checked rainfall and not wind. If your plan involves small boats in Guna Yala between December and March, ask about the sea rather than the sky.
What this does to flying
We fly year-round. In the rainy season the pilot in command decides; if weather stops a flight, it is rescheduled at no cost. Visual airfields close on cloud base rather than on rainfall, which is why a rainy day can be perfectly flyable and a grey one closed.
The practical consequence is the same as elsewhere in the region: morning departures work better, and it is worth keeping the flying day clear of anything that cannot move. We show a "from" price per route; the final fare depends on the date, the group and the baggage, and is confirmed in writing before booking.
Choosing by what you want
Reliable sun and city weather: January to March. The Caribbean islands: February and March, or September and October. Green, quiet and cheaper: May, June and early December. The highlands: any month, accepting that cloud is part of the product. Avoid if you can: November, on both sides.
The thing to plan around, not against
The afternoon pattern in the wet months is stable enough to build a day on. Outdoors and moves in the morning, soft afternoons, and most of the season stops being an obstacle.
The trips that struggle here are the ones scheduled tightly across both coasts in a month that is wet on one of them.
Frequently asked questions
Does Panama have one dry season?
No. The Pacific side is dry from roughly mid-December to April; the Caribbean rains in most months with two drier windows.
When is the Caribbean side best?
Around February and March, and again in September and October — the latter being the wettest weeks on the Pacific.
Which month should I avoid?
November, on both sides. Early December usually recovers.
What is the wind issue?
Trade winds blow hard on the Caribbean from December to March, so a dry forecast can still mean a rough boat crossing in Guna Yala.
Does rain stop flights?
It is cloud base rather than rainfall. A wet day can fly and a grey one may not, so mornings work better.
How do I plan around the wet season?
Outdoors and moves in the morning, soft afternoons. The pattern is stable enough to build a day on.
Let's plan it together
We fly year-round. In the rainy season the pilot in command decides; if weather stops a flight, it is rescheduled at no cost.