Is it better to just buy water on the street?

Yes. Convenience stores like Circle K or FamilyMart are on every corner and sell cold bottled water for about $0.50. Don't carry a heavy reusable bottle from home; just buy cold ones as you go.

Absolutely. The sun is intense. A wide-brimmed, breathable hat is better than a baseball cap because it provides shade for your neck and ears, which helps keep your overall body temperature lower.

Staying Cool in Ho Chi Minh City

To survive the humidity, time your outdoor activities for before 10:00 AM and after 4:00 PM, and rely on 'breeze-breaks' in air-conditioned cafes. Carry a small hand towel and drink at least 2 liters of water daily to prevent heat exhaustion.

Master the midday window. Avoid being outside between 11:00 AM and 3:00 PM when the humidity peaks. Use this time for indoor activities like visiting the War Remnants Museum, browsing the air-conditioned malls in District 1, or taking a nap in your hotel.
Choose your fabrics carefully. Wear loose-fitting, light-colored linen or moisture-wicking synthetic fabrics. Avoid denim or thick cotton, which trap sweat against your skin and lead to chafing.
Strategize your transport. Download the Grab app. Pay the extra couple of dollars for a 'GrabCar' instead of a motorbike taxi during the hottest hours to ensure you have consistent AC during your transit.
Manage the sweat. Carry a face towel. Everyone here does it. Also, keep a small bottle of baby powder or an anti-chafing stick in your day bag to manage humidity-induced skin irritation.

Is it better to just buy water on the street?: Yes. Convenience stores like Circle K or FamilyMart are on every corner and sell cold bottled water for about $0.50. Don't carry a heavy reusable bottle from home; just buy cold ones as you go.
Should I wear a hat?: Absolutely. The sun is intense. A wide-brimmed, breathable hat is better than a baseball cap because it provides shade for your neck and ears, which helps keep your overall body temperature lower.