Sunset Time in Ha Long Bay Today

Sunset & Daylight Patterns Specific to Ha Long Bay

Ha Long Bay sits at 20.9° N in the tropical zone. It is autumn there now, and the sun currently spends 11.9 hours above the horizon each day.

Sunsets are latest in June around the summer solstice and earliest in December. Near the solstices, the sunset time barely shifts day to day; near the equinoxes (March, September), it moves up to 2 minutes per day. Ha Long Bay runs from 10.9 to 13.4 hours of daylight across the year, a 2.5-hour swing. Today's 11.9 hours set how much room you have to move plans around.

Golden hour in Ha Long Bay lasts about 43 minutes today, with civil twilight adding a further 22 minutes of usable blue-hour light after sunset.

The most photogenic sunset conditions in Ha Long Bay come in October, November, March, April, when the atmosphere is clearest and high-pressure systems push cloud layers away from the western horizon. The limestone karsts of Ha Long Bay are so numerous (nearly 2,000) that they create localized wind shadows and fog patterns, meaning different parts of the bay can experience completely different weather simultaneously.

Civil twilight at Ha Long Bay's latitude lasts approximately 22 minutes after the sun drops below the horizon — this is the "blue hour" window of soft, diffused light that photographers prize above all others. At 20.9°, this window is brief, making precise timing critical — the sky transitions from golden to dark in under half an hour.

Sun & Moon Times in Ha Long Bay

Sunset timing in Ha Long Bay is driven by latitude and season. We apply atmospheric refraction corrections for accuracy within one minute. Golden hour begins roughly 60 minutes before sunset — the most valuable window for photography, outdoor dining, and evening walks.

Sunset in Ha Long Bay shifts by several minutes each week. Summer evenings are longest, winter sunsets arrive earliest. Cloud cover near the horizon does not change the sunset time itself, though it can hide the sun a few minutes early and often produces the most dramatic color displays.

For the best sunset experience, arrive at your viewing spot 30 minutes before the listed time. Conditions can shift — check again on the day itself.

What Determines Sunset Time?

Sunset time in Ha Long Bay is determined by the city's latitude, longitude, and the time of year. During summer, the Earth's axial tilt causes the sun to take a longer path across the sky, resulting in later sunsets. In winter, the opposite occurs — shorter days mean earlier sunsets. Near the equinoxes (March and September), sunset times change most rapidly, shifting by 2–3 minutes per day. At Ha Long Bay's latitude, the difference between the earliest and latest sunset can be several hours across the year. Our daily calculations use precise astronomical data to give you the exact sunset time accurate to the minute.