January in Ha Long Bay — workable with trade-offs
Trade-offs · 6.5/10January averages 17°C (62°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 58 mm, so plan one flexible day in three; you still get about 2 sunny days and 10.9 hours of daylight.
It scores 6.5/10 here, 5th of 12 months, against 8/10 in the destination's best month.
Expect peak pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 1.5 points higher on the same scale.
February in Ha Long Bay — workable with trade-offs
Trade-offs · 6.2/10February averages 17°C (63°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 74 mm, so plan one flexible day in three; you still get about 3 sunny days and 11.3 hours of daylight.
It scores 6.2/10 here, 7th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 1.8 points higher on the same scale.
March in Ha Long Bay — reliably good (3rd best month)
Good · 7.5/10March averages 21°C (70°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 50 mm, so plan one flexible day in three; you still get about 9 sunny days and 11.9 hours of daylight.
It scores 7.5/10 here, 3rd of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.
April in Ha Long Bay — workable with trade-offs
Trade-offs · 6.8/10April averages 25°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 60 mm, so plan one flexible day in three; you still get about 15 sunny days and 12.5 hours of daylight.
It scores 6.8/10 here, 4th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.
May in Ha Long Bay — the hardest end of the year
Hardest · 4.2/10May averages 27°C (80°F) with humidity around 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
246 mm of rain puts this in monsoon territory — about 20 sunny days across the whole month, and multi-day washouts are normal.
It scores 4.2/10 here, 8th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 3.8 points higher on the same scale.
June in Ha Long Bay — the hardest end of the year
Hardest · 3.2/10June averages 29°C (83°F) with humidity around 89%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
397 mm of rain puts this in monsoon territory — about 18 sunny days across the whole month, and multi-day washouts are normal.
It scores 3.2/10 here, 10th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 4.8 points higher on the same scale.
July in Ha Long Bay — the hardest end of the year
Hardest · 3.7/10July averages 29°C (84°F) with humidity around 87%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
333 mm of rain puts this in monsoon territory — about 25 sunny days across the whole month, and multi-day washouts are normal.
It scores 3.7/10 here, 9th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 4.3 points higher on the same scale.
August in Ha Long Bay — the hardest end of the year
Hardest · 3.1/10August averages 28°C (83°F) with humidity around 87%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
415 mm of rain puts this in monsoon territory — about 17 sunny days across the whole month, and multi-day washouts are normal.
It scores 3.1/10 here, 11th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 4.9 points higher on the same scale.
September in Ha Long Bay — the hardest end of the year
Hardest · 3/10September averages 28°C (82°F) with humidity around 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
459 mm of rain puts this in monsoon territory — about 15 sunny days across the whole month, and multi-day washouts are normal.
It scores 3/10 here, 12th of 12 months, against 8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 5 points higher on the same scale.
October in Ha Long Bay — workable with trade-offs
Trade-offs · 6.3/10October averages 24°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 90 mm, so plan one flexible day in three; you still get about 17 sunny days and 11.5 hours of daylight.
It scores 6.3/10 here, 6th of 12 months, against 8/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer, footwear you can get muddy.
If your dates are flexible, November is materially better in Ha Long Bay — 1.7 points higher on the same scale.
November in Ha Long Bay — the year's strongest window
Best window · 8/10November averages 22°C (72°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 33 mm of rain — occasional showers rather than washed-out days — alongside about 12 sunny days and 11 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Ha Long Bay at 8/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
December in Ha Long Bay — reliably good (2nd best month)
Good · 7.8/10December averages 17°C (62°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rain is a non-issue at 7 mm for the month, with about 6 sunny days and 10.7 hours of daylight to work with.
It scores 7.8/10 here, 2nd of 12 months, against 8/10 in the destination's best month.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack layers you can shed by midday plus one warm layer for the evening, footwear you can get muddy.
