Haikou weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Fair
Best time to visit: October – April
What is the weather like in Haikou in August?
In August, Haikou is hot: daytime highs average 31 °C, and even at night it stays warm at around 27 °C. The sea averages 28.7 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It rains often – on about 21 days, adding up to 224 mm. On about 20 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a so-so month for a holiday in Haikou.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 40 | 41 | 45 |
| Day | 31° | 31° | 29° |
| Night | 27° | 27° | 26° |
| Sea | 29° | 29° | 28° |
| Sun | 7 h | 7 h | 6 h |
| Rain days | 17 | 21 | 19 |
More details for August
- Daylight
- 12 h 50 min06:18 – 19:08
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 75 %on averageAll months
- Hot days
- 20 days30 °C or moreAll months
- Time zone
- UTC+8Asia/Shanghai
How the score comes together
- Temperatureweight 50 %56 %
- Sunshineweight 20 %63 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Haikou in August: quick answers
Is Haikou hot in August?
Yes. In August, Haikou is hot: daytime highs average 31 °C and nights stay around 27 °C. On about 20 days the thermometer climbs to 30 °C or more.
Can you swim in Haikou in August?
Yes. In August the sea averages 28.7 °C – lovely and warm for swimming.
Does it rain much in Haikou in August?
It rains often – on about 21 days, adding up to 224 mm.
Haikou month by month
The whole year in HaikouAll destinations: ChinaWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences