AI-generatedHaikou at a glance
- Best time
- Oct – Apr
- Warmest month
- Jun · 31°
- Warmest sea
- Jul · 28.8°
- Sunshine a year
- 1,890 h
- Rain a year
- 1,341 mm
- Climate
- Subtropical
- Time zone
- UTC+8
- Elevation
- 9 m
Climate in Haikou
Haikou has a subtropical climate with warm summers and mild winters. June is the warmest month with average highs of 31 °C, while January is the coolest at 21 °C. With around 1,890 hours of sunshine a year, Haikou is moderately sunny; July is the sunniest month with 7.4 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Good
Best time to visit: October – April
October is the peak of the typhoon season
Keep in mindFrequent rainStorm season
A typical day in October
- Morning, 08:00: about 25°
- Midday, 13:00: about 27°
- Afternoon, 16:00: about 27°
- Evening, 20:00: about 26°
- Night, 23:00: about 25°
06:3318:16
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:19–07:02 · evening 17:46–18:29
- Blue hour
- Morning 06:11–06:19 · evening 18:29–18:38
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Haikou in October?
In October, Haikou is hot: daytime highs average 27 °C, and even at night it stays warm at around 25 °C. The sea averages 27.4 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. It rains often – on about 15 days, adding up to 196 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Haikou.
More details for October
- Daylight
- 11 h 43 min06:33 – 18:16
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 29 daysdew point 18 °C or moreAll months
- Wind
- 25 km/haverage daily peakAll months
- Cloud cover
- 54 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Time zone
- UTC+8Asia/Shanghai
How the score comes together
- Temperatureweight 50 %95 %
- Sunshineweight 20 %38 %
- Few rainy daysweight 30 %24 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Sea temperature in Haikou
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 26.6 – 28.1 °C
Swimming season: Mar – Dec
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Haikou ranges from 19.3 °C in February to 28.8 °C in July. It is warm enough for a comfortable swim (20 °C and more) from March to December.
The sea warms up slowly: it is warmest in July, while the air already peaks in June. From November to December the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in July, eight out of ten years were between 28.2 and 29.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 19.8° | 18.8° | 21.2° | fresh |
| FebruaryFeb | 19.3° | 18.0° | 20.7° | fresh |
| MarchMar | 20.6° | 18.7° | 21.9° | refreshing |
| AprilApr | 23.1° | 21.9° | 24.6° | pleasant |
| MayMay | 26.4° | 25.6° | 27.2° | warm |
| JuneJun | 28.1° | 27.1° | 28.7° | warm |
| JulyJul | 28.8° | 28.2° | 29.7° | warm |
| AugustAug | 28.7° | 27.8° | 29.5° | warm |
| SeptemberSep | 28.3° | 27.5° | 29.1° | warm |
| OctoberOct | 27.4° | 26.6° | 28.1° | warm |
| NovemberNov | 25.3° | 24.5° | 26.1° | pleasant |
| DecemberDec | 22.3° | 21.1° | 23.4° | refreshing |
Sunshine hours in Haikou
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.3 of 11.7 hours of daylight in Haikou, 45 % of the day.
Sunshine hours: measured at the weather station 11 km away, averages 1991–2020 (WMO climate normals). Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Haikou
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 9 · very highStay in the shade around midday; SPF 50, clothing, hat and sunglasses.
The sun is strongest in May (UV 12).
Minutes until sunburn in October
- Very fair skin
- about 15 min
- Fair skin
- about 20 min
- Light brown skin
- about 25 min
- Olive skin
- about 35 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Haikou: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Haikou has about 15 rainy days with 196 mm of rain in total.
Wind and clouds in Haikou
How breezy and how cloudy Haikou is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Haikou typically peaks at 25 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: Jul, Sep – Apr.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 54 % of the sky over Haikou: variable cloud, with about 5.3 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Haikou
How often the day gets hot in Haikou (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Haikou has about 1 hot days, with an average daytime high of 27 °C: often muggy. The air feels warmer than the thermometer says: light, airy clothes and slow days help.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Haikou
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Pleasant 15–20°
- Warm 20–24°
- Hot 24° and more
- muggy month (10+ muggy days)
HotOctober: nights around 25°. Hot nights: air conditioning makes sleeping much easier. Muggy on about 29 days (dew point 18 °C or more).
The coolest nights are in January (17°), the warmest in July (27°). Tropical nights of 20 °C and more are the rule from March to November; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from December to February. It is muggy (dew point 18 °C or more) on about 285 days a year, mostly from February to November.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 76 | 21° | 17° | 19.8° | 3.0 h | 6 | 29 |
| FebruaryFeb | 77 | 22° | 18° | 19.3° | 3.4 h | 6 | 32 |
| MarchMar | 76 | 25° | 21° | 20.6° | 4.1 h | 8 | 36 |
| AprilApr | 65 | 28° | 23° | 23.1° | 5.3 h | 11 | 71 |
| MayMay | 45 | 30° | 26° | 26.4° | 6.7 h | 17 | 128 |
| JuneJun | 40 | 31° | 27° | 28.1° | 7.1 h | 16 | 136 |
| JulyJul | 40 | 31° | 27° | 28.8° | 7.4 h | 17 | 178 |
| AugustAug | 41 | 31° | 27° | 28.7° | 6.8 h | 21 | 224 |
| SeptemberSep | 45 | 29° | 26° | 28.3° | 5.8 h | 19 | 229 |
| OctoberOct | 62 | 27° | 25° | 27.4° | 5.3 h | 15 | 196 |
| NovemberNov | 75 | 25° | 22° | 25.3° | 4.0 h | 8 | 48 |
| DecemberDec | 77 | 22° | 19° | 22.3° | 3.1 h | 6 | 34 |
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
20.03° N, 110.35° E · 9 m · Asia/Shanghai
Best time to visit Haikou
The best time to visit Haikou is from October to April. For a beach holiday with the sea above 21 °C, go in April and in November. For sightseeing, day trips and hiking, conditions are most comfortable from November to March. Rain is most frequent from May to October; the wettest month is September with 229 mm.
Haikou through the seasons
How the weather changes over the seasons, with averages for each.
Haikou in spring
Mar – May
Good
- 25–30 °C by day
- Sea 23 °C
- 5 h of sun a day
- 36 rainy days in all
Haikou in summer
Jun – Aug
Fair
- 31 °C by day
- Sea 29 °C
- 7 h of sun a day
- 54 rainy days in all
Haikou in autumn
Sep – Nov
Good
- 25–29 °C by day
- Sea 27 °C
- 5 h of sun a day
- 42 rainy days in all
Haikou in winter
Dec – Feb
Good
- 21–22 °C by day
- Sea 21 °C
- 3 h of sun a day
- 18 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Haikou for you.
Your best months: December – February
Based on the climate averages; tap a month to see its details.
Compare two months in Haikou
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
February has the better holiday weather in Haikou: score 77 against 62. In February, days are 5 °C cooler than in October. The sea is 8 °C cooler in February. February has 9 fewer rainy days. The sun shines 2 hours less a day in February.
| Month | October | February |
|---|---|---|
| Weather score | 62 | 77better |
| Day high | 27° | 22° |
| Night low | 25° | 18° |
| Sea | 27.4° | 19.3° |
| Sunshine | 5.3 hbetter | 3.4 h |
| Rainy days | 15 | 6better |
| Rainfall | 196 mm | 32 mmbetter |
| Muggy days | 29 | 13better |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
Apr, Nov
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Nov – Mar
15–28 °C and not too much rain
Rainy months
May – Oct
12 or more rainy days
Haikou month by month
The typical weather for every month at a glance.
76January21° · Sea 20° · 3 h
In January, Haikou is mild: daytime highs average 21 °C, and nights cool down to about 17 °C. The sea averages 19.8 °C – bracing, so a wetsuit helps for longer swims. The sun is scarce, with only about 3 hours a day. Rain falls on about 6 days, adding up to 29 mm. All in all, January is a good month for a holiday in Haikou.
Haikou in January77February22° · Sea 19° · 3 h
In February, Haikou is warm: daytime highs average 22 °C, and nights cool down to about 18 °C. The sea averages 19.3 °C – bracing, so a wetsuit helps for longer swims. The sun is scarce, with only about 3 hours a day. Rain falls on about 6 days, adding up to 32 mm. All in all, February is a good month for a holiday in Haikou.
Haikou in February76March25° · Sea 21° · 4 h
In March, Haikou is warm: daytime highs average 25 °C, and even at night it stays warm at around 21 °C. The sea averages 20.6 °C – refreshing for a swim. Expect around 4 hours of sunshine a day. Rain falls on about 8 days, adding up to 36 mm. The air is often humid and muggy. All in all, March is a good month for a holiday in Haikou.
Haikou in March65April28° · Sea 23° · 5 h
In April, Haikou is hot: daytime highs average 28 °C, and even at night it stays warm at around 23 °C. The sea averages 23.1 °C – pleasant for swimming. Expect around 5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 71 mm in total. On about 9 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, April is a good month for a holiday in Haikou.
Haikou in April45May30° · Sea 26° · 7 h
In May, Haikou is hot: daytime highs average 30 °C, and even at night it stays warm at around 26 °C. The sea averages 26.4 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It rains often – on about 17 days, adding up to 128 mm. On about 16 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is a so-so month for a holiday in Haikou.
Haikou in May40June31° · Sea 28° · 7 h
In June, Haikou is hot: daytime highs average 31 °C, and even at night it stays warm at around 27 °C. The sea averages 28.1 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It rains often – on about 16 days, adding up to 136 mm. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is a so-so month for a holiday in Haikou.
Haikou in June40July31° · Sea 29° · 7 h
In July, Haikou is hot: daytime highs average 31 °C, and even at night it stays warm at around 27 °C. The sea averages 28.8 °C – lovely and warm for swimming. The sun shines for around 7 hours a day. It rains often – on about 17 days, adding up to 178 mm. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a so-so month for a holiday in Haikou.
Haikou in July41August31° · Sea 29° · 7 h
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.
Haikou in August45September29° · Sea 28° · 6 h
In September, Haikou is hot: daytime highs average 29 °C, and even at night it stays warm at around 26 °C. The sea averages 28.3 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. It rains often – on about 19 days, adding up to 229 mm. On about 10 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a so-so month for a holiday in Haikou.
Haikou in September62October27° · Sea 27° · 5 h
In October, Haikou is hot: daytime highs average 27 °C, and even at night it stays warm at around 25 °C. The sea averages 27.4 °C – lovely and warm for swimming. Expect around 5 hours of sunshine a day. It rains often – on about 15 days, adding up to 196 mm. The air is often humid and muggy. All in all, October is a good month for a holiday in Haikou.
Haikou in October75November25° · Sea 25° · 4 h
In November, Haikou is warm: daytime highs average 25 °C, and even at night it stays warm at around 22 °C. The sea averages 25.3 °C – pleasant for swimming. Expect around 4 hours of sunshine a day. Rain falls on about 8 days, adding up to 48 mm. The air is often humid and muggy. All in all, November is a good month for a holiday in Haikou.
Haikou in November77December22° · Sea 22° · 3 h
In December, Haikou is warm: daytime highs average 22 °C, and nights cool down to about 19 °C. The sea averages 22.3 °C – refreshing for a swim. The sun is scarce, with only about 3 hours a day. Rain falls on about 6 days, adding up to 34 mm. All in all, December is a good month for a holiday in Haikou.
Haikou in DecemberHaikou compared
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Haikou vs. Sanya
In October Haikou has the better holiday weather (score 62 vs. 54). During the day Sanya is 1 °C warmer than Haikou. The sea in Sanya is 1 °C warmer.
| in October | Haikou | Sanya |
|---|---|---|
| Holiday score | 62 | 54 |
| Daytime high | 27° | 28° |
| Sea | 27° | 28° |
| Sunshine | 5 h | 5 h |
| Rainy days | 15 | 15 |
| Best time | Oct – Apr | Nov – Mar |
Through the year
China in October: the best places
In October, Haikou ranks 28 among the 31 nearest destinations in this country.
- Shantou27°26°89
- 2Jinan21°89
- 3Quanzhou27°25°88
- 4Xiamen28°25°84
- 5Kaifeng22°84
- 6Zhengzhou22°83
- 7Nanjing22°82
- 8Hefei23°81
- 28HaikouThis page27°27°62
Planning a trip to Haikou
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Haikou in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Haikou has its best school-holiday weather during the Christmas holidays (score 77) and its weakest during the summer holidays (score 41).
- 68
Easter holidays
Mar – Apr
Good
- 27 °C by day
- Sea 22 °C
- 4.9 h of sun a day
- 10 rainy days a month
- 44
May half-term
May – Jun
Fair
- 30 °C by day
- Sea 27 °C
- 6.8 h of sun a day
- 17 rainy days a month
Keep in mind: Frequent rain
- 41
Summer holidays
Jul – Aug
Fair
- 31 °C by day
- Sea 29 °C
- 7.0 h of sun a day
- 19 rainy days a month
Keep in mind: Frequent rain, Storm season
- 62
October half-term
Oct
Good
- 27 °C by day
- Sea 27 °C
- 5.3 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain, Storm season
- 77
Christmas holidays
Dec – Jan
GoodBest holidays
- 21 °C by day
- Sea 21 °C
- 3.1 h of sun a day
- 6 rainy days a month
Good for: Sightseeing & walks
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 12 h 5 min
- Distance
- 9,620 km
- Time zone
- UTC+8
- Jet lag
- About 7 days (7 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Storm season
Haikou lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January
- February
- March
- April
- May
- June: Season
- July: Season
- August: Peak
- September: Peak
- October: Peak
- November: Season
- December
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM); not a forecast.
Frequently asked questions about Haikou
When is the best time to visit Haikou?
The best time to visit Haikou is from October to April. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Haikou?
The sea temperature in Haikou ranges from 19.3 °C in February to 28.8 °C in July. It is warm enough for a comfortable swim (20 °C and more) from March to December.
Can you swim in Haikou in October?
Yes. In October the sea averages 27.4 °C – lovely and warm for swimming.
What is the warmest month in Haikou?
June is the warmest month, with average highs of 31 °C and nights around 27 °C. January is the coolest month at 21 °C.
When does it rain most in Haikou?
Rain is most frequent from May to October; the wettest month is September with 229 mm. The driest month is January with 29 mm.
How many hours of sunshine does Haikou get?
Haikou gets around 1,890 hours of sunshine a year. The sunniest month is July with 7.4 hours a day; in January there are 3.0 hours a day.
What time zone is Haikou in?
Haikou uses the time zone Asia/Shanghai, at UTC+8 all year.
How long is the flight from London to Haikou?
A nonstop flight from London to Haikou takes about 12 h 5 min, for a straight-line distance of about 9,620 km. Most routes need a change of planes, which adds time.
When is typhoon season in Haikou?
Haikou lies in an area that Pacific typhoons can reach. The typhoon season runs from June to November, with most storms from August to October. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Haikou?
Haikou has its best school-holiday weather during the Christmas holidays (score 77) and its weakest during the summer holidays (score 41). Holiday ratings (0–100): Easter holidays 68, May half-term 44, Summer holidays 41, October half-term 62, Christmas holidays 77.
Near Haikou
Other destinations close by.
Places with a climate like Haikou
Destinations whose weather through the year is closest to Haikou's – good alternatives.