10-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Rain showers
24°
Feels like 32°
Wind↑ E 28 km/h
Gusts44 km/h
Humidity 83 %
💧 2.6 mm
Afternoon
Rain showers
26°
Feels like 35°
Wind↑ ENE 31 km/h
Gusts38 km/h
Humidity 77 %
💧 3.9 mm
11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Rain showers
24°
Feels like 32°
Wind↑ E 23 km/h
Gusts41 km/h
Humidity 86 %
💧 3.0 mm
Afternoon
Rain showers
27°
Feels like 36°
Wind↑ ENE 28 km/h
Humidity 73 %
💧 1.1 mm
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Rain showers
24°
Feels like 33°
Wind↑ E 19 km/h
Gusts36 km/h
Humidity 88 %
💧 1.9 mm
Afternoon
Rain showers
27°
Feels like 35°
Wind↑ ENE 30 km/h
Humidity 72 %
💧 0.5 mm
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Overcast
25°
Feels like 34°
Wind↑ E 16 km/h
Gusts28 km/h
Humidity 83 %
💧 0.1 mm
Afternoon
Drizzle
25°
Feels like 34°
Wind↑ ENE 24 km/h
Gusts32 km/h
Humidity 82 %
💧 0.9 mm
⚡ storm
Haikou forecast in charts · next 7 days
The week ahead: highs and lows
▲ This week runs +2.1° warmer than usual
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Haikou climate: what a normal year looks like
Afternoons reach 30 °C or more from June to August; the typical peak is 31 °C in July.
The hottest stretch is July, when afternoons average 31 °C; the coldest is January, when nights average 17 °C.
A normal year brings roughly 1,380 mm of rain — more than 71% of the towns of 20,000+ people we compared it with.
Forecast highs for the coming week average 29 °C, 2 °C warmer than a normal October (27 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
20 °C
17 °C
39 mm
Feb
21 °C
18 °C
39 mm
Mar
24 °C
21 °C
43 mm
Apr
27 °C
23 °C
76 mm
May
29 °C
26 °C
131 mm
Jun
31 °C
27 °C
154 mm
Jul
31 °C
27 °C
177 mm
Aug
31 °C
27 °C
238 mm
Sep
29 °C
26 °C
227 mm
Oct
27 °C
25 °C
167 mm
Nov
25 °C
22 °C
51 mm
Dec
21 °C
19 °C
42 mm
Whole year
26 °C
23 °C
1,380 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 20.02° N, 110.28° E, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Haikou: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.59µg/m³
PM1012µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Haikou
Rain observed over the last two hours by official weather radars around Haikou, followed by the radar forecast for the next hour where the weather service provides one.
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Rain radarLast two hours, then forecast where available · drag the timeline
No open weather radar covers Haikou yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Haikou
Waning gibbous
79 % illuminated · 19.3 days
Rise 18:44 Set 07:46
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Wed11/113%
Moonrise and moonset in local time (Asia/Shanghai); phase and lit fraction from a synodic calculation.
Look up a past day in Haikou
Curious about the weather in Haikou on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Haikou weather at a glance
This page gathers everything about the weather in Haikou, Hainan: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “rain showers”, it is 26 °C (feels like 37 °C) and the wind blows at 21 km/h.
Expected range today: 24 °C to 29 °C and around 6 mm of rain; keep an eye on thunderstorms. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Haikou forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
