January in Cat Ba Island — the year's strongest window
Best window · 9.1/10January averages 19°C (66°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 9.8 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Cat Ba Island at 9.1/10 — 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.
February in Cat Ba Island — the year's strongest window
Best window · 9.1/10February averages 20°C (68°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 10.8 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Cat Ba Island at 9.1/10 — 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.
March in Cat Ba Island — the year's strongest window
Best window · 9.1/10March averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 12 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Cat Ba Island at 9.1/10 — 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.
April in Cat Ba Island — reliably good (6th best month)
Good · 7.8/10April averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 13.3 daylight hours.
It scores 7.8/10 here, 6th of 12 months, against 9.1/10 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, footwear you can get muddy.
May in Cat Ba Island — workable with trade-offs
Trade-offs · 5.2/10May averages 31°C (88°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
260 mm of rain puts this in monsoon territory — about 11 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.2/10 here, 8th of 12 months, against 9.1/10 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, January is materially better in Cat Ba Island — 3.9 points higher on the same scale.
June in Cat Ba Island — workable with trade-offs
Trade-offs · 5.2/10June averages 34°C (93°F) at 77% humidity — genuinely punishing heat. Anything outdoors needs to happen before 10am.
260 mm of rain puts this in monsoon territory — about 11 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.2/10 here, 9th of 12 months, against 9.1/10 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, January is materially better in Cat Ba Island — 3.9 points higher on the same scale.
July in Cat Ba Island — workable with trade-offs
Trade-offs · 5.2/10July averages 36°C (97°F) at 77% humidity — genuinely punishing heat. Anything outdoors needs to happen before 10am.
260 mm of rain puts this in monsoon territory — about 11 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.2/10 here, 10th of 12 months, against 9.1/10 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, January is materially better in Cat Ba Island — 3.9 points higher on the same scale.
August in Cat Ba Island — workable with trade-offs
Trade-offs · 5.2/10August averages 35°C (95°F) at 77% humidity — genuinely punishing heat. Anything outdoors needs to happen before 10am.
260 mm of rain puts this in monsoon territory — about 11 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.2/10 here, 11th of 12 months, against 9.1/10 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, January is materially better in Cat Ba Island — 3.9 points higher on the same scale.
September in Cat Ba Island — workable with trade-offs
Trade-offs · 5.2/10September averages 32°C (90°F) at 77% humidity — genuinely punishing heat. Anything outdoors needs to happen before 10am.
260 mm of rain puts this in monsoon territory — about 11 sunny days across the whole month, and multi-day washouts are normal.
It scores 5.2/10 here, 12th of 12 months, against 9.1/10 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, January is materially better in Cat Ba Island — 3.9 points higher on the same scale.
October in Cat Ba Island — reliably good (7th best month)
Good · 7.8/10October averages 28°C (82°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 10.8 daylight hours.
It scores 7.8/10 here, 7th of 12 months, against 9.1/10 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, footwear you can get muddy.
November in Cat Ba Island — the year's strongest window
Best window · 9.1/10November averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 9.8 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Cat Ba Island at 9.1/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
December in Cat Ba Island — the year's strongest window
Best window · 9.1/10December averages 21°C (70°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 9.5 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Cat Ba Island at 9.1/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here.
Pack light clothing, swimwear and real sun protection, footwear you can get muddy.
