Should I wear a suit in Singapore?

Only if you are attending high-stakes meetings in finance or law. Otherwise, a smart 'business casual' look with a crisp shirt and trousers is the standard.

How do I deal with the extreme temperature shift?

Singapore is effectively two climates: the sweltering outdoors and the freezing indoors. Always keep a light sweater or jacket accessible to deal with aggressive office air conditioning.

Staying Professional in Tropical Humidity

Prioritize natural, breathable fabrics like linen and high-twist wool while ditching the undershirt. Focus on loose-fitting cuts that allow airflow to prevent sweat buildup during outdoor commutes.

Select the right fabrics. Avoid synthetic materials like standard polyester, which trap heat. Opt for linen-cotton blends, seersucker, or tropical-weight wool (often labeled as 'cool wool'), which wicks moisture and regulates temperature better than cotton.
Master the 'commute-to-office' transition. Do not wear your blazer or jacket while walking outdoors. Carry it folded over your arm or kept in a garment bag, and put it on only once you are inside an air-conditioned building.
Simplify your layers. Skip the undershirt entirely. It adds an unnecessary layer of heat that keeps sweat against your skin. If you are worried about perspiration marks, choose patterns or textures like a micro-check or linen weave that hide moisture better than solid, flat-weave cotton.
Adjust your footwear. Leather soles are slippery in tropical rain and trap heat. Choose professional shoes with breathable leather linings and moisture-wicking insoles. If the office culture allows, opt for loafers over heavy lace-ups to improve ventilation.

Should I wear a suit in Singapore?: Only if you are attending high-stakes meetings in finance or law. Otherwise, a smart 'business casual' look with a crisp shirt and trousers is the standard.
How do I deal with the extreme temperature shift?: Singapore is effectively two climates: the sweltering outdoors and the freezing indoors. Always keep a light sweater or jacket accessible to deal with aggressive office air conditioning.