Should I bring heavy boots?

Only if you are doing serious multi-day trekking in Sapa. Otherwise, a pair of supportive, water-resistant trail runners is more versatile for both cities and rural terrain.

Is it okay to wear shorts in cities?

Casual shorts are fine for walking around cities, but avoid them if visiting government buildings or the Ho Chi Minh Mausoleum.

How to dress for Vietnam's unpredictable weather

Layering is your only defense against Vietnam’s regional weather extremes, which range from sub-tropical heat in the South to near-freezing mountain temperatures in the North. Pack a lightweight waterproof shell and versatile, breathable fabrics to stay comfortable as you move through different climate zones.

Master the North (Hanoi & Sapa). If traveling between November and March, bring a thermal base layer and a packable down jacket. It gets surprisingly cold and damp; you will need these to stay dry and warm while trekking or walking the city streets.
Prepare for the Central Coast rains. If visiting Da Nang, Hoi An, or Hue between October and January, prioritize quick-dry clothing and a high-quality rain poncho. Humidity is high, and heavy rain is common, so avoid denim, which takes days to dry once soaked.
Stay cool in the South (Ho Chi Minh City & Delta). The South stays hot (30°C+) year-round. Pack loose-fitting linen or moisture-wicking synthetic shirts. Avoid tight clothing to prevent heat rashes and chafing.
Respect temple dress codes. Regardless of the region, always carry a lightweight scarf or sarong in your day bag. You must cover your shoulders and knees to enter pagodas and historical sites.

Should I bring heavy boots?: Only if you are doing serious multi-day trekking in Sapa. Otherwise, a pair of supportive, water-resistant trail runners is more versatile for both cities and rural terrain.
Is it okay to wear shorts in cities?: Casual shorts are fine for walking around cities, but avoid them if visiting government buildings or the Ho Chi Minh Mausoleum.