When you spend summer in Zhuhai, you step right into a subtropical climate shaped by the city’s coastal spot along the South China Sea. Average daytime temperatures run from about 30°C to 32°C (86°F to 90°F), and nights stay warm at 27°C to 28°C (81°F to 82°F).
The heat mixes with high humidity, so it feels hotter than the numbers suggest. That sticky, muggy air is something you’ll notice as soon as you step outside.
Rainfall really defines the season. June through August brings frequent showers and sometimes heavy downpours, but you’ll also get stretches of sunshine between storms.
The wet and dry spells set the rhythm of summer. Sea breezes can offer a bit of relief from the heavy air, although it’s not always enough.
The coast shapes more than just the weather. Sea temperatures hover around 28°C to 30°C (82°F to 86°F), so the water feels great for swimming and boating.
Long daylight hours mean you can enjoy the outdoors—just be ready to change your plans if a storm rolls in.
Overview of Zhuhai’s Summer Climate
Zhuhai sits on China’s southern coast, where a humid subtropical climate makes summers long, warm, and wet. You’ll notice high humidity, lots of rain, and steady warmth that barely dips at night.
Geographic Setting and Climate Classification
Zhuhai lies along the Pearl River Delta, facing the South China Sea. Its coastal position brings in moist air from the ocean, which drives up humidity and keeps rain coming.
This city falls into the humid subtropical climate category. Summers get hot and damp, while winters stay mild.
The sea keeps temperature swings smaller here, so you don’t see wild highs or lows like you might inland.
Zhuhai’s geography means growing seasons last a long time. Warm sea surface temperatures, which climb to about 84°F (29°C) in late summer, keep the air muggy.
The ocean effect also brings lots of clouds and onshore winds, so you often see a hazy sky.
Typical Summer Weather Patterns
During summer, Zhuhai’s daily highs usually land between 86°F and 92°F (30°C–33°C). Nighttime lows stick around 79°F (26°C), so evenings aren’t much cooler.
Rain falls often, especially in June and July. You’ll probably run into a wet day nearly half the time early in the season, though the chance drops by late August.
Rain comes in heavy showers or thunderstorms, not so much gentle drizzle.
Humidity barely budges, and you’ll feel muggy almost every day. Winds usually blow from the south at 9–10 mph, bringing in even more moisture.
Clouds are common, but by late August, you might notice the sky clearing up a bit.
Seasonal Comparison: Summer vs. Other Seasons
Summer in Zhuhai is the wettest and most humid stretch of the year. Winter, on the other hand, is cooler and much drier, with average daytime highs around 60°F (16°C) and lower humidity.
You’ll probably only need light sweaters during the coldest months.
Spring and autumn act as transition periods. Spring brings rising temps and more rain, while autumn feels more comfortable, with less rain and humidity.
Compared to those seasons, summer stands out for its steady heat, high dew points, and long daylight hours—up to 13.5 hours in June.
Average Summer Temperatures in Zhuhai
Summer in Zhuhai means warm to hot weather, high humidity, and long days. Temperatures stay high, with only small differences between daytime and nighttime, so the heat sticks around and shapes your daily plans.
Daytime and Nighttime Temperature Ranges
In summer, daytime highs usually hit between 30°C and 33°C (86°F–91°F). Some days, especially in July and August, can get even hotter.
The combination of heat and humidity means it often feels warmer than the thermometer says.
At night, temperatures don’t drop much. You can expect lows between 26°C and 28°C (79°F–82°F).
This small difference between day and night makes for a steady, persistent warmth. Unlike inland cities that cool off after sunset, Zhuhai’s coastal location keeps things toasty even at night.
If you’re planning outdoor activities in the evening, you’ll want to keep this in mind.
Monthly Temperature Variations: June to August
June kicks off the peak summer, with average highs around 30°C (86°F). Nights hover near 26°C (79°F).
The heat is noticeable but hasn’t quite peaked yet.
July usually brings the hottest weather. Highs often reach 32°C (90°F), and sea temperatures hit their top at about 29°C (84°F).
Nights stay warm, around 27°C (81°F).
August keeps the strong summer heat going, though things might ease just a bit toward the end of the month. Highs average 31°C (88°F), and nights stay close to 27°C (81°F).
| Month | Avg High (°C/°F) | Avg Low (°C/°F) | Sea Temp (°C/°F) |
|---|---|---|---|
| June | 30 / 86 | 26 / 79 | 28 / 82 |
| July | 32 / 90 | 27 / 81 | 29 / 84 |
| August | 31 / 88 | 27 / 81 | 28.7 / 83.7 |
Hottest Periods and Extreme Highs
The hottest stretch usually hits in late July and early August. Daytime highs can sometimes reach 35°C to 36°C (95°F–97°F).
These peaks aren’t daily, but they do pop up when skies are clear and winds are calm.
Humidity stays high, which makes it feel even hotter. The heat index—a measure of how hot it feels—often pushes the perceived temperature above 40°C (104°F).
Even with extreme highs, Zhuhai’s coastal spot keeps away the long heat waves that inland cities get.
Sea breezes help a bit, though evenings can still feel heavy and warm. If you’re sensitive to heat, you’ll want to plan ahead for hydration and shade.
Humidity and Heat Index During Summer
Summer in Zhuhai brings high humidity and warm temps that often make the air feel hotter than the thermometer shows. The mix of moisture and heat really shapes your experience of the season.
Typical Humidity Levels
Humidity stays very high during summer. Average levels usually fall between 80% and 88%, with July being especially muggy.
The air holds a lot of moisture, especially during the hottest part of the day.
Humidity rarely drops below 75% this time of year. Even at night, the dampness sticks around, so the air can feel sticky.
Rain adds to the constant moisture, making it slow for the ground and air to dry out.
Since Zhuhai has a humid subtropical climate, these conditions stick around from June to August. Unlike dry heat, the high humidity makes it harder for your body to cool down by sweating.
So the same temperature feels warmer than it looks on paper.
Impact on Comfort and Outdoor Activities
The heat index in Zhuhai often climbs above the actual air temperature because of the humidity.
For example, when it’s 32°C (90°F), it might feel closer to 38°C (100°F).
Physical activity in this weather can get tiring fast. Walking, cycling, or sightseeing in the afternoon sun feels strenuous, especially without shade or breaks.
It helps to stay hydrated and wear light, breathable clothing.
Most people find outdoor plans work better in the early morning or evening, when it’s a bit cooler.
Locals and visitors often pick indoor attractions, shaded parks, or breezy coastal spots to cope with the heat index.
Rainfall and Precipitation Patterns
Summer in Zhuhai brings heavy rainfall, frequent thunderstorms, and high humidity. Wetter conditions start in late spring and run through early autumn, with August being the rainiest.
Rainy Season Duration and Intensity
The rainy season usually starts in May and lasts through September. Moisture from the South China Sea fuels long stretches of wet weather.
Rainfall isn’t light or scattered. Instead, you’ll often see intense downpours that last for several hours.
Most storms hit in the afternoons and evenings.
Humidity stays high, often above 80%, which makes the air feel warmer. The mix of heat and moisture creates a sticky environment that can feel uncomfortable if you’re outside for long.
Monthly Rainfall Totals and Rainy Days
Rain doesn’t fall evenly month to month. August is the wettest, averaging over 300 mm of rain across about 18 days.
June and July also bring heavy rainfall, often topping 250 mm each month.
September starts to dry out a bit, but showers remain common. You can expect 15 to 18 rainy days per month during peak summer.
| Month | Avg. Rainfall (mm) | Rainy Days |
|---|---|---|
| June | ~270 mm | 16–17 |
| July | ~280 mm | 17–18 |
| August | ~320 mm | 18 |
| September | ~200 mm | 14–15 |
If you’re visiting Zhuhai in summer, it’s smart to plan for indoor activities or keep your schedule flexible.
Thunderstorms and Weather Events
Thunderstorms pop up regularly during Zhuhai’s summer. They often form quickly in the afternoon, when warm air rises and meets moist sea breezes.
Lightning is common in these storms, and heavy rain can suddenly cut visibility. Strong winds sometimes come with the storms, especially in July and August.
Tropical systems from the South China Sea sometimes affect the region. Not every year brings a direct hit, but typhoons can pass close enough to cause intense rain, strong gusts, and temporary flooding.
It’s a good idea to keep an eye on weather advisories during this season.
Sunshine, Daylight, and Cloud Cover
During summer, Zhuhai gets long days, lots of daylight, and frequent cloud cover.
The mix of sunshine and clouds really shapes how comfortable it feels to be outside, especially in the hottest months.
Average Hours of Sunshine
Zhuhai averages 6 to 7 hours of sunshine per day in summer. July is usually the sunniest, with more clear skies than early summer.
Even with long daylight, humidity and clouds reduce how much direct sun you actually see. In June, for example, you might get bright mornings but then hazy or cloudy afternoons.
Here’s a quick look at average sunshine:
| Month | Avg. Daily Sunshine |
|---|---|
| June | ~6.5 hours |
| July | ~7.0 hours |
| August | ~6.5 hours |
It’s usually best to plan outdoor activities earlier in the day, when skies are clearer and temperatures are a touch lower.
Day Length and Seasonal Changes
Summer gives Zhuhai its longest days, reaching about 13.5 hours in June and July. By August, daylight shortens a bit but still stays above 13 hours.
Long days mean more time for sightseeing, beach trips, or evening walks along the coast.
The combination of heat and humidity makes midday less comfortable, so you might prefer mornings or late afternoons.
Compared to winter, when daylight can be as short as 10.8 hours in December, summer feels noticeably longer.
If you like to maximize your time outdoors, you’ll appreciate the extended daylight in these months.
Cloudiness and Sky Conditions
Cloud cover really defines summer weather in Zhuhai. Skies stay overcast or mostly cloudy about 75–85% of the time on average.
June feels cloudier, while July and August offer a bit more blue sky.
The region’s monsoon season, peaking in summer, drives this high cloud frequency. Most afternoons, clouds build up fast and sometimes drop heavy, quick rain showers.
Still, you’ll catch bright breaks during the day. Mornings usually bring the best shot at uninterrupted sunshine before the clouds roll in again.
Sea Temperatures and Coastal Influences
Zhuhai sits along China’s southern coast, so the warm sea shapes both the climate and daily life here. The South China Sea keeps summer water temperatures high, which bumps up humidity, rainfall, and even the comfort level for outdoor fun.
Average Sea Surface Temperatures
The South China Sea stays reliably warm during Zhuhai’s summer. Surface temperatures usually range from 28°C to 29.5°C (82°F to 85°F) between June and August.
July and August often hit the top end, with water lingering near 29.4°C (84.9°F).
Even early in the season, the sea warms up quickly. By June, you’ll already see averages above 28°C (83°F), so swimming and boating feel great.
These steady temps mean you probably won’t run into sudden changes, so water-based plans stay pretty reliable.
| Month | Avg. Sea Temp °C (°F) |
|---|---|
| June | 28.4 (83.1) |
| July | 29.1 (84.4) |
| August | 29.3 (84.7) |
These high readings really show off the subtropical setting. The sea acts like a heat reservoir, keeping the coast warmer than inland spots at the same latitude.
Effect on Local Weather and Activities
Warm sea temperatures directly shape Zhuhai’s summer weather. The heated water pushes humidity levels over 80% most days and supports frequent rainfall.
Afternoon showers and thunderstorms pop up a lot, especially in July and August, when moisture from the South China Sea feeds local clouds.
If you’re visiting, you’ll find these conditions cut both ways. Swimming, diving, and sailing feel comfortable without wetsuits, but the same warm water also fuels typhoon activity, which can mess with summer travel plans.
Locals tend to schedule outdoor stuff for the morning or evening, when the air’s a bit lighter. The sea breeze helps, but honestly, midday can feel pretty sticky with all that warmth and humidity.
The South China Sea’s steady heat gives Zhuhai a long beach season. It really shapes that subtropical summer vibe you’ll notice.
Transition From Summer to Autumn in Zhuhai
As summer wraps up, Zhuhai moves from long, humid days to milder, more comfortable conditions. Temperatures drop off, humidity eases, and rainfall starts to settle, so the city’s climate shifts in a way you can definitely feel.
Weather Changes in Early Autumn
September still hangs onto some of that summer heat. Daytime highs often hover around 28°C (82°F), but nights become cooler and a bit more pleasant.
The heavy humidity from July and August finally backs off, making outdoor activities less of a sweaty ordeal.
Daylight hours shrink slowly, from about 12.3 hours in September to closer to 11 hours by November. That helps take the edge off the sun compared to peak summer.
Sea surface temperatures stay warm in early autumn, averaging 28.3°C (82.9°F) in September. By October, the water cools a little, but it’s still good for swimming and other water fun.
Early autumn feels like a sweet spot for enjoying the coast, without the brutal summer heat.
Tourism usually picks up around this time, since conditions are less intense. You’ll probably notice clearer skies, less haze, and steadier weather compared to the stormier months.
Gradual Cooling and Decreasing Rainfall
As October and November roll in, Zhuhai starts to cool down and dry out. Average highs dip to about 26°C (79°F) in October and then drop further to 22–24°C (72–75°F) in November. That’s honestly a nice break from the crazy summer heat.
Rainfall takes a nosedive too. The summer monsoon, which usually dumps buckets of rain, backs off and lets a much drier pattern settle in. By November, you’ll notice way less precipitation, and rainy days become pretty rare compared to the soggy August stretch.
Humidity drops as well, so you won’t feel as sticky outside. The air feels lighter, and being outdoors actually becomes pleasant. This change makes autumn a great time to wander around, hop on a bike, or just enjoy Zhuhai’s coastal parks.
The cooling doesn’t happen overnight, but it’s obvious enough. By late autumn, days get shorter, evenings turn crisp, and the whole city feels calmer than during those hot, humid summer months.