The short answer
When to go to Cat Ba
April to May and October to November are the best windows: warm enough for beaches and boats, with lower rain than the summer months. June to September is hot, humid and wet, and August is the wettest month at the Hai Phong station, so boat days can be cancelled. December to February is cool and often grey, which suits walking but not swimming. For older travellers, October and November are the most comfortable.
Month by month
Cat Ba weather by month
| Month | High | Low | Rain | Verdict | What to expect |
|---|---|---|---|---|---|
| January | 20°C | 14°C | 28 mm | Cool and often grey; carry a warm layer | |
| February | 20°C | 15°C | 27 mm | Cool and misty; not a swimming month | |
| March | 22°C | 18°C | 49 mm | Warming up; drizzle possible, pleasant for walks | |
| April | 26°C | 21°C | 85 mm | Warm, with moderate rain; good for boats and beaches | |
| May | 31°C | 24°C | 202 mm | Hot, with rain building; good early in the month | |
| June | 32°C | 26°C | 238 mm | Hot, humid and wet; keep plans flexible | |
| July | 32°C | 26°C | 238 mm | Hot and wet; showers can disrupt boats | |
| August | 32°C | 25°C | 353 mm | Wettest month; boat trips may be cancelled | |
| September | 31°C | 24°C | 257 mm | Still wet, easing late in the month | |
| October | 29°C | 22°C | 136 mm | Rain easing and warm; a comfortable month | |
| November | 26°C | 19°C | 43 mm | Dry, mild and clear; the most comfortable month | |
| December | 22°C | 16°C | 23 mm | Cool and dry; bring layers for boats |
Temperatures and rainfall are long-term monthly averages. Check the forecast a few days before you travel.
Seasons at a glance
Cat Ba seasons for families and seniors
The easiest months: April, October and November
- April: Warm, with moderate rain; good for boats and beaches
- October: Rain easing and warm; a comfortable month
- November: Dry, mild and clear; the most comfortable month
Good, with small trade-offs: March and May
- March: Warming up; drizzle possible, pleasant for walks
- May: Hot, with rain building; good early in the month
Possible, with planning: January, February, June, July, September and December
- January: Cool and often grey; carry a warm layer
- February: Cool and misty; not a swimming month
- June: Hot, humid and wet; keep plans flexible
- July: Hot and wet; showers can disrupt boats
- September: Still wet, easing late in the month
- December: Cool and dry; bring layers for boats
Best avoided with parents or children: August
- August: Wettest month; boat trips may be cancelled
Useful answers
Best time to visit Cat Ba: FAQs
What is the best month to visit Cat Ba?
April, October and November are the best months to visit Cat Ba, with March and May also good. April to May and October to November are the best windows: warm enough for beaches and boats, with lower rain than the summer months. June to September is hot, humid and wet, and August is the wettest month at the Hai Phong station, so boat days can be cancelled. December to February is cool and often grey, which suits walking but not swimming. For older travellers, October and November are the most comfortable.
Which months should I avoid in Cat Ba with elderly parents?
August is the month to avoid with older travellers. Wettest month; boat trips may be cancelled
When does it rain most in Cat Ba?
August is the wettest month, with about 353 mm of rain on average. The hottest month is July, with average highs around 32°C.