The Two Seasons
Costa Ballena has two seasons, not four: a dry season and a green (rainy) season. Both are good — they're just different.
Mid-December–April
Sunny, drier days and the busiest, most in-demand months. Bright mornings, warm afternoons, and the easiest beach weather — book well ahead.
May–mid-December
Lush, vivid, and quieter, with bright mornings and afternoon showers. Everything turns brilliant green, the waterfalls are full, and there are far fewer people.
Many guests assume the green season is a compromise; it usually isn't. The mornings are often clear and sunny, the rain tends to come later in the day, the whole coast is at its most beautiful, and the pace is gentler. It's a favorite time of year for people who don't mind — or actively enjoy — a warm afternoon storm watched from a covered terrace.
How Hot Is It?
Warm and humid year-round — this is the tropics, near sea level — but the hills temper it. Up where most villas sit, breezes and cooler nights make a real difference.
Daytime is hot and the humidity is real, so you'll live in light clothing and swimwear. The good news is that the elevation many homes enjoy brings a near-constant breeze through open living spaces, and the nights up there often turn genuinely cool and comfortable for sleeping — one reason so many homes are designed open to the air rather than sealed and chilled.
Air Conditioning & Which Rooms
It varies by home, and the most common pattern is air conditioning in the bedrooms, with open-air living areas cooled by strong ceiling fans and the breeze. Some homes have more, some less — the villa page is specific.
As the team often puts it: "the bedrooms have air conditioning, but the common areas have very efficient fans and usually a decent breeze." That design is deliberate — the living spaces are meant to be open to the air and the view. A few homes have air conditioning in the living areas too; a few rely on fans and elevation entirely. One practical note: in some homes the air conditioning is set to pause when the doors are left open, to protect the system in an open-air house — so close the bedroom up if you want it cold. Check your villa page for exactly which rooms are air-conditioned.
Rain & the Green Season
In the green season the rhythm is simple: clear mornings, showers later in the day. Plan outings early and keep the afternoon for the villa.
Rain here is usually a warm afternoon or evening event rather than an all-day grey, and it passes. The local habit is to get the beach, the waterfall, or the tour done in the morning, then settle in for a long lunch and downtime as the clouds build — the pool between showers, everyone gathered under a roof while it comes down. The full day-planning rhythm is in the Beaches, Parks & Days Out guide. One practical link: the same rain is why a genuine 4x4 matters in these months — see Roads, Rental Cars & Transportation.
Power Outages & Backup
Brief power cuts do happen, mostly on rainy-season evenings when branches come down on the lines. They're a normal part of rural coastal life, and the homes are set up for them.
No spot in Costa Rica can promise perfectly uninterrupted power, and the more remote, hillier homes feel it a little more. The reassuring part is how the villas handle it: many have a solar battery backup that keeps the essentials running — lights, internet, fans, and the fridge — though heavier loads like air conditioning, water heaters, and pool pumps pause until the grid returns. About half the homes we manage also have a backup generator, which earns its keep in the green season. And there's always someone to call.
"Most outages are short and weather-related — and on a rainy night, our team is the one getting the call to sort it out, so you don't have to."
Water & Septic: Good to Know
Two small tropical realities worth knowing on day one: water comes from tanks or wells, and the homes run on septic systems — so toilet paper goes in the bin beside the toilet, not down the bowl.
The septic note is the single most useful thing to remember — flushing paper is hard on these systems, so every bathroom has a small lined bin for it. On water: most homes draw from a tank, so a run of back-to-back long showers can briefly outpace the supply; spacing them out keeps the pressure strong. Tap water in this area is generally safe to drink, and the villa page flags anything specific to your home (more on water and food in the Food, Groceries & Eating Well guide).
What to Pack
Pack light. You'll live in swimwear, shorts, and sandals — bring less than you think, plus a few tropics-specific items.
- Light, breathable clothing and plenty of swimwear — you'll wear little else.
- Reef-safe sunscreen and a refillable water bottle.
- Insect repellent for dusk, and a hat and sunglasses.
- Water shoes or sport sandals for rocky beaches and waterfall scrambles.
- Light hiking shoes if you plan on trails or Nauyaca.
- A light rain layer or packable poncho in the green season.
- A dry bag for phones at the beach and on boats.
- Any specialty toiletries, medications, or specific items — the local shops are good but not exhaustive.
Most homes already provide pool and beach towels, a hair dryer, and an iron, and beach chairs are often on hand or easy to pick up at BM Supermarket — so you don't need to haul them. If something specific matters to you, just ask before you pack.
Bugs, Humidity & Open-Air Living
Open-air homes in the rainforest mean a little insect life is part of the experience — harmless, and easy to keep outside with one simple habit.
The trick the team swears by: in the evening, leave the outdoor ceiling fans running and the balcony lights on, and keep the screen or sliding doors closed. The light draws the insects out to the terrace rather than into the rooms, the moving air keeps them from settling, and the closed doors do the rest — so the bugs stay outside where they belong. If the balcony light doesn't bother you, leaving it on through the night works even better.
As for the geckos — you'll spot a few on the walls and ceilings, and they're good company. They're small, shy, completely harmless, and quietly useful, spending the night eating the mosquitoes. Most guests are a little fond of them by the end of the week.
The humidity is the bigger adjustment for some: clothes dry slowly, and a sea breeze becomes your friend. None of it should worry you — the full picture of the wildlife you'll actually meet is in the Wildlife & Living in Nature guide.
The Comfort Trade-Off
The same things that make these homes special — open living spaces, hillside breezes, rainforest all around — are why they're cooled by the air more than by a thermostat, why the power flickers on a stormy night, and why a gecko might join you for breakfast. None of it is hardship; it's the texture of staying somewhere genuinely in nature rather than sealed off from it. Come prepared for it and it stops being a trade-off within a day.
“You can't control the weather — and we just enjoyed the rain and the rest at the home.”
From a guest review