June · Vietnam
Best time to visit Cat Ba Island in June Weather, crowds & prices
Weather in Cat Ba Island in June
Average temperature 29°C, 342 mm of rain, about 19 days with 6+ hours of sunshine and 88% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
June score
3.4/10
Ranked #10 of 12 months
- Avg temp
- 29°C
- Rainfall
- 342 mm
- Humidity
- 88%
- Days with 6h+ sun
- 19
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
June in Cat Ba Island scores 3.4/10 for nature and wildlife travel - ranked #10 of 12. Expect around 29°C, 342 mm of rain, and roughly 19 days with 6+ hours of sunshine this month.
Largest island in Halong/Lan Ha Bay featuring rainforest national parks, bioluminescent plankton, and kayaking.
June in Cat Ba Island — the hardest end of the year
Days in June average 29°C (83°F) and humidity near 88% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 342 mm: only about 19 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 3.4/10 on the same scale — 10th of 12 months, versus 7.9/10 for the best month here.
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.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, November is materially better in Cat Ba Island — 4.5 points higher on the same scale.
Frequently asked
- What is the weather like in Cat Ba Island in June?
- In June, Cat Ba Island averages 29°C, 342 mm of rain, and about 19 days with 6+ hours of sunshine. Its climate-comfort score is 3.4/10.
- Is June a good time to visit Cat Ba Island?
- June earns a 3.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Cat Ba Island in June?
- Expect about 342 mm of rain in June. Average humidity is 88% and there are about 19 days with 6+ hours of sunshine.
Curated in Cat Ba Island
Tickets & experiences
Things to do in Cat Ba Island
Cat Ba Island, Vietnam. Live activities and tours from GetYourGuide, matched to this destination.