Which Condo Direction Is Best in Bangkok, Comparing Sun, Wind and Electricity Cost
In Short
Advice
Key Highlights
- West facing units are the hottest in Bangkok because they take direct sun through the afternoon, when the outside air is already at its daily peak and the wall has been warming all day. North facing units get the least direct sun and hold the steadiest indoor temperature.
- The sun does not sit in the same place all year. From September to April it tracks to the south, and from May to August it tracks slightly north, which is why south facing units get far more direct sun in the cool season than most buyers expect.
- Thailand has two monsoon systems. The southwest monsoon runs from mid May to mid October and brings humid air and rain, while the northeast monsoon runs from mid October to mid February and brings cool dry air, according to the Thai Meteorological Department.
- The electricity difference between directions can be calculated rather than guessed. A 9,000 BTU unit with a SEER of 23 running two extra hours a day costs roughly 93 baht more per month at the 3.95 baht per unit average rate.
- If the direction you want is not available, heat reducing window film, blackout curtains and keeping the bed away from the sun facing wall all cut the load on the air conditioner without changing units.
Does Orientation Affect Your Bills or Just How a Room Feels?
Ask any agent in Bangkok which condo direction is best and you will usually hear that north is cool and west is hot. That is true, and it is also not enough to decide on. What you actually pay for is the number of extra hours your air conditioner runs, and how comfortable the unit is during the hours you are physically in it.
This guide breaks orientation into three layers you can verify for yourself. The first is the path the sun takes, which shifts month by month. The second is the seasonal wind, which decides whether you can ever open a window instead of switching on the aircon. The third is the electricity cost, which can be turned into an actual number. Once you can see all three, you can judge whether the price premium on a particular unit is worth paying.
Which Direction Do Most Bangkok Buyers Choose, and Why?
North and east facing units tend to sell first, and many developers price them above identical layouts facing west. The logic is straightforward. North facing rooms take almost no direct sun across the year, while east facing rooms take the morning sun and are in shade well before noon, so the walls never carry heat into the evening.
Popularity is not the same as suitability, though. If you leave for work at seven and get home at nine at night, the morning light in an east facing unit is something you rarely see. Someone working from home all day, on the other hand, will feel the difference between directions every single afternoon. Before paying a premium for orientation, work out which hours of the day you are actually in the unit.
Comparing All Four Directions on Sun, Wind and Cooling Load
Each direction below is assessed on the same three points, the sun it receives through the day, the wind it catches by season, and the cooling load that follows. The sun path and monsoon timing come from Thai climate data rather than from general rules of thumb.
North Facing, the Least Direct Sun and the Steadiest Temperature
| Factor | North facing unit |
|---|---|
| Sun | From September to April a north facing unit takes almost no direct sun, because the sun is tracking south. Some angled light comes in between May and August when the sun tracks slightly north, but it arrives early or late in the day and is weak |
| Wind | Catches the northeast monsoon from mid October to mid February, which is cool and dry. This is the stretch of the year when you can realistically open the windows instead of running the aircon |
| Cooling load | The lowest of the four. The walls never store heat from direct sun, so the air conditioner reaches your set temperature faster and cycles less |
| Worth knowing | Daylight indoors is soft and consistent, which suits anyone working from home. The trade off is that the unit can feel dim on overcast days, and laundry hung on the balcony takes noticeably longer to dry |
South Facing, the Best Airflow but Direct Sun in the Cool Season
| Factor | South facing unit |
|---|---|
| Sun | This is the direction buyers misjudge most often. Between September and April the sun tracks south, so a south facing unit takes direct sun for most of the day through the cool season and early hot season. It is not the shaded option many people assume it is |
| Wind | The strongest all round airflow of the four. It catches southerly breezes during the transitional period from mid February to mid May, and then the southwest monsoon from mid May to mid October |
| Cooling load | Moderate. The sun that enters comes in at a high angle and does not reach as deep into the room as the low afternoon sun from the west, and the airflow offsets part of the gain |
| Worth knowing | If the building faces the river or open land, the wind can be far stronger than expected. Ask the juristic person whether there are rules about opening windows during storms |
East Facing, Morning Sun That Clears Before Evening
| Factor | East facing unit |
|---|---|
| Sun | Direct sun from sunrise until roughly midday, after which the unit sits in shade for the whole afternoon. Heat stored in the walls during the morning has time to dissipate long before bedtime |
| Wind | Gets airflow late in the year from the northeast monsoon, but sits on the sheltered side during the rainy season and catches less wind than south or west facing units |
| Cooling load | Low to moderate, and this is the best value direction for anyone who uses the unit mainly from early evening onward, because by the time you get home the room has already cooled |
| Worth knowing | In the hot season the morning sun is strong enough to wake you at six through thin curtains. If you like sleeping late, budget for proper blackout curtains from day one |
West Facing, the Hottest Direction but Usually the Lower Price
| Factor | West facing unit |
|---|---|
| Sun | Direct sun from early afternoon until sunset, which is exactly when outdoor temperatures peak. The walls absorb that heat and keep releasing it into the room through the early evening |
| Wind | Takes the full southwest monsoon from mid May to mid October. That wind is humid and arrives with rain, so west facing balconies get wet more often than any other direction |
| Cooling load | The highest of the four, and it is the only direction where the heat peak lines up with the hours most people are home |
| Worth knowing | West facing units are often priced below identical layouts in other directions. If you are willing to manage the heat with film and curtains, that discount can outweigh the extra electricity. These units also get the sunset view, which is a genuine selling point with some tenants |
How Much Does Direction Really Change the Electricity Bill?
There is no central Thai data source publishing average electricity costs broken down by unit orientation, so any percentage you see quoted online without a source should be treated with caution. The reliable approach is to calculate from something you can actually measure, which is the number of extra hours you run the air conditioner because the room is warmer.
The base rate used here is the average electricity tariff of 3.95 baht per unit for the May to August 2026 billing period, with the Ft adjustment charge at 0.1623 baht per unit. Residential electricity in Thailand is billed on a tiered scale, so the more you use the more each unit costs, with the average landing somewhere between roughly 3.70 and 4.15 baht per unit. These figures change each billing cycle, so check the current rate before running your own numbers.
The Two Minute Calculation Anyone Can Do
Air conditioner manufacturers use this formula. Running cost equals BTU divided by SEER divided by 1,000, multiplied by hours run, multiplied by days, multiplied by the cost per unit of electricity. SEER is the seasonal energy efficiency rating printed on the appliance label, and a higher number means lower consumption.
Applied to a 9,000 BTU unit with a SEER of 23, the size commonly fitted in studios and one bedroom units, at 3.95 baht per unit, the numbers come out like this.
| Extra hours per day | Inverter unit at SEER 23 | Older non inverter unit at SEER around 11 |
|---|---|---|
| One hour | Roughly 46 baht per month | Around 97 baht per month |
| Two hours | Roughly 93 baht per month | Around 194 baht per month |
| Three hours | Roughly 139 baht per month | Around 291 baht per month |
What this tells you is that in a small unit the orientation premium on your electricity bill sits in the tens to low hundreds of baht per month, not the thousands. Set against a purchase price difference that can run into six figures, the useful question is no longer which direction is cooler. It is how many years it takes for the electricity saving to repay the extra you paid. Divide the price difference by the annual electricity difference and you have the answer in years.
How Do Bangkok's Seasonal Winds Change the Answer?
The Thai Meteorological Department describes two monsoon systems over Thailand. The southwest monsoon covers the country from mid May to mid October, drawing humid air off the Indian Ocean and bringing heavy cloud and rain. The northeast monsoon runs from mid October to mid February, pulling cool dry air down from China and Mongolia, which is why the skies are clear and the nights are cooler at that time of year.
In practice this means no direction has good airflow all year. South and west facing units breathe well during the rainy season, but that same wind carries humidity and driving rain onto the balcony. North and east facing units get the cool dry air from late in the year into February, and that is the window when opening a window genuinely replaces the aircon.
One factor that gets overlooked is that airflow in a condo does not depend on direction alone. Neighbouring towers blocking the breeze, the floor you are on, and whether the windows are sliding panels or awning panels matter as much as orientation. A south facing unit on the fifth floor with a building directly in front of it can get less air than a north facing unit on the twenty fifth floor with open sky on every side.
How Much Weight Should You Give Auspicious Directions?
Auspicious directions carry real weight in the decisions of many Thai buyers, and different traditions give different guidance depending on the owner's birth day or birth year. Factually, none of this changes the temperature of the room or the size of the bill. It does affect how settled the occupant feels in the home, which is a reasonable thing to care about.
The balanced approach is to use the sun and wind data as your first filter, narrowing the shortlist to units that are comfortable and affordable to cool. Then apply whatever beliefs matter to you within that shortlist. That way you are not forced to choose between the two, and you are not paying extra for a hotter unit purely because it points the right way.
It is worth thinking one step ahead as well. If you sell or rent the unit later, the next buyer or tenant may hold an entirely different set of beliefs, so an auspicious direction is no guarantee of an easier resale. The market still weighs location, walking distance to the train and the condition of the unit far more heavily.
What Compensates When You Cannot Get the Direction You Want?
In reality, a unit that hits your budget, your layout, your floor and your preferred direction all at once does not come along often. When orientation is the thing you have to give up, the goal becomes reducing how much heat enters the unit and how hard the air conditioner has to work. That is achievable, and it costs very little next to a price premium.
Window Film, Curtains and Furniture Placement
- Window film. Look at the total solar energy rejected figure in the product specification rather than judging by how dark the tint looks. Light coloured films with strong heat rejection do exist and will not darken the room. Always get written approval from the juristic person first, since most buildings specify the permitted film type and shade so the facade stays uniform.
- Blackout curtains. Use two layers, a sheer and a blackout, and mount the track above the window frame and extend it around fifteen centimetres past each side, so heat cannot leak in around the edges.
- Furniture placement. Keep the bed and sofa off any wall that takes direct sun, because that wall keeps radiating heat through the early evening. Leave a gap and use a wardrobe or shelving unit as a buffer instead.
- Using the aircon. Setting the thermostat to 26 degrees with a fan circulating the air uses less electricity than setting it to 22 with no fan, and servicing the unit on the schedule in the manual matters, because a clogged coil makes the compressor work harder without making the room any cooler.
- Clearing stored heat. Open windows on two sides for around ten minutes before switching on the aircon. Flushing out the hot air first means the unit spends less time pulling the temperature down.
Six Steps to Check a Unit's Real Orientation Before You Sign
The direction printed in the brochure and the direction the unit actually faces are not always the same, especially in buildings whose footprint is not aligned to true north. The steps below take under half an hour in total and protect you from a mistake you cannot fix after transfer.
- Open the compass app on your phone while standing in the middle of the unit, face the main window and write down the bearing. Do not rely on the brochure alone.
- Book a second viewing between two and four in the afternoon, the hottest stretch of the day. If the unit is still comfortable then, it passes.
- Put your hand on the wall that takes the afternoon sun. If it feels clearly warm, that wall is storing heat and will keep releasing it for hours.
- Stand on the balcony and look at whether other buildings block the breeze, or could block your light in future. Ask the agent directly whether the neighbouring plot already has an approved construction permit.
- Ask the juristic person or the agent which types of window film the building allows, and whether there are rules on the colour of curtains facing outward.
- Ask to see a real electricity bill, either for the show unit or from a neighbour in the same orientation. One genuine bill is worth more than any estimate.
Who Should Care Most About Orientation?
Not everyone needs to pay a premium for direction. The people who benefit most clearly are those who spend daytime hours in the unit, which means anyone working from home, retirees, families with young children, and pet owners who do not leave the aircon running all day. For this group, north and east facing units offer value you can feel.
Orientation matters less if you leave early and come home late, because the hottest part of the day happens while the unit is empty. That group is usually better off spending the same money on a higher floor, a shorter walk to the station, or a larger layout, all of which the market rewards more when it comes time to sell.
If you are buying to rent out, start from your target tenant instead. West facing units with a sunset view appeal to many foreign tenants who weight the view above the temperature, while tenants who work from home will ask about orientation before anything else. Knowing who your tenant is answers the question faster than any theory about which direction is best.
Frequently Asked Questions About Condo Direction in Bangkok
Which direction unit should you choose when buying a condo
If comfort and electricity cost are your priorities, north facing is the safest choice because it takes the least direct sun across the year, followed by east facing, which only takes morning sun and cools down before evening. South facing units have the strongest airflow but take direct sun from September to April, and west facing units are the hottest because they take the afternoon sun. The right answer for you depends on which hours you are actually in the unit. If you work from home, choose north. If you are out all day, put that money toward a factor you will actually use.
Are west facing condos in Bangkok really too hot to live in
They are perfectly livable, and they usually cost less than an identical layout facing another way. What you accept is a wall that stores heat through the afternoon and releases it into the early evening, which is manageable with heat reducing film, two layer blackout curtains and keeping the bed off the sun facing wall. In numbers, if the unit needs two extra hours of aircon a day, a 9,000 BTU unit with a SEER of 23 adds roughly 93 baht a month at 3.95 baht per unit. Weigh that against the price discount and decide.
How much does orientation change the monthly electricity bill
No central Thai source publishes average bills by orientation, so treat unsourced figures with caution. What you can verify is the calculation. Take BTU, divide by SEER, divide by 1,000, then multiply by hours, days and the cost per unit. For a one bedroom unit running a 9,000 BTU air conditioner, the difference typically lands in the tens to low hundreds of baht per month rather than the thousands.
Why do south facing units get hot in the cool season
Because the sun does not sit overhead all year. From September to April it tracks across the southern sky, so a south facing unit takes direct sun for most of the day through that stretch. From May to August the sun tracks slightly north and the same unit becomes shaded again. This is why a single viewing in one month can leave you with the wrong impression of what living there is like across the year.
How much extra is a preferred direction worth paying for
Turn it into a payback period rather than a feeling. Divide the price difference between the two units by the annual electricity difference you calculated. The result is the number of years you would need to stay for the orientation to pay for itself on energy alone. If that number is longer than you plan to hold the unit, the money is better spent on a higher floor or a location closer to the station.
Where can I see real units with orientation details
Start from the PropertyScout listings and filter by area and budget, then ask a property consultant for the floor plate and the orientation of each unit before you book a viewing. You can browse everything currently available on the Condos for Rent in Bangkok page. If renting in Bangkok is new to you, the guide to renting a property in Bangkok covers the process end to end, and foreign buyers should read buying property in Thailand before committing to a unit.
Summary
There is no single answer to which condo direction is best. North gives you cool rooms and predictable bills, east suits anyone who uses the unit in the evening, south delivers the airflow but asks you to accept direct sun in the cool season, and west trades heat for a lower price. What makes the decision straightforward is knowing which hours you are home, then converting the electricity difference and the price difference into a payback period in years.
Once you are down to two or three units, go back in the afternoon between two and four, put your hand on the sun facing wall, and ask for a real electricity bill if you can get one. These small checks tell you more than anything written in a brochure.
Prices and availability change and are not guaranteed. Property information is general guidance only. The electricity tariffs quoted apply to the May to August 2026 billing period and are subject to revision by the regulator. This content is not legal, tax or financial advice.
Ready to see units in person? Browse verified listings on PropertyScout and let a property consultant shortlist units by orientation, floor and budget for you.
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