Things to Do in Vietnam in April

April offers the Goldilocks zone for riding the Hai Van Pass between Da Nang and Hue. The notorious mist that shrouds the pass in winter has lifted, revealing staggering views of the South China Sea. The brutal summer heat hasn't yet made the asphalt shimmer with unbearable heat. The 20 km (12.4 mile) climb is a series of hairpin turns where the scent of salt air mixes with exhaust. You'll find local coffee stalls at the summit serving strong, sweet ca phe sua da over ice. It's the one time of year the ride is about the journey, not lasting the weather.

The odds of crystal-clear, postcard-perfect conditions are highest in April. The bay's thousands of limestone karsts rise from water that shifts from emerald green to deep jade under a sky mostly free of the summer haze or winter gloom. This is when swimming off the boat in secluded coves feels refreshing, not chilly. Kayaking through arches like Dark and Bright Cave feels like slipping into another world. The only sound is the drip of water from your paddle and the distant cry of seabirds. The evenings on deck are mild, good for watching the fishing boat lights appear like floating stars.

The relentless heat that wilts cyclists by 10 AM hasn't fully arrived. Early morning rides through the rice paddies and vegetable villages outside Hoi An are pleasant. You'll pedal past fields being readied for the new crop, the air smelling of damp earth and water buffalo. The light is soft, good for photos of the well-known yellow-walled old town without the harsh midday shadows. By the time you return, the tailor shops are just opening. Reward yourself with a cold glass of fresh sugar cane juice from a street cart.

Often called 'Ha Long Bay on land,' the river routes through the rice fields and limestone caves of Ninh Binh are at their most lively in April. The paddies are a brilliant, almost neon green, and the lotus flowers in the wetlands are just beginning to bud. The boat ride itself is often rowed by locals using their feet. It glides silently through low-hanging caves where the air suddenly turns cool and damp, then emerges into sunny valleys framed by sheer cliffs. The visual contrast between the green and the grey stone is absolutely impressive this month.

As the evening cools down the city's feverish daytime temperature, the street food scene erupts. A night tour by motorbike (with a local driver) lets you experience it all without the sweat-drenched exhaustion of walking. You'll zip from a hidden alleyway for banh xeo (crispy turmeric crepes) sizzling in a tiny pan, to a decades-old stall for hu tieu (clear noodle soup) where the broth has been simmering since dawn. The aroma of pork bones and dried squid cuts through the petrol fumes. The humidity makes the ice in your che (sweet dessert drink) clink musically. The city feels alive, not oppressive.