Swimming in China in september 2025 Sea temperature by city in september
Do you want to go to the beach in China in september 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in september in China by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in China in september 2025
Here, find the average sea temperature in China in september in several coastal cities.
Hong Kong in september
83°F
min: 81°F / max: 86°F
84°F
min: 81°F / max: 86°F
84°F
min: 81°F / max: 86°F
Cheung Chau
84°F
min: 81°F / max: 86°F
Lamma Island
83°F
min: 81°F / max: 86°F
Victoria Peak
84°F
min: 81°F / max: 86°F
East Coast in september
78°F
min: 73°F / max: 83°F
81°F
min: 77°F / max: 85°F
78°F
min: 75°F / max: 82°F
Matsu Islands
81°F
min: 78°F / max: 84°F
Nantong
77°F
min: 73°F / max: 82°F
Ningbo
80°F
min: 75°F / max: 84°F
Northeast in september
72°F
min: 67°F / max: 77°F
Huludao
72°F
min: 67°F / max: 76°F
Panjin Honghaitan
72°F
min: 68°F / max: 76°F
South East in september
83°F
min: 80°F / max: 87°F
Beihai
85°F
min: 80°F / max: 89°F
Fuzhou
81°F
min: 78°F / max: 84°F
Hailing island
83°F
min: 81°F / max: 86°F
83°F
min: 81°F / max: 87°F
Hebao Island
83°F
min: 81°F / max: 86°F
North in september
75°F
min: 70°F / max: 79°F
Yantai
73°F
min: 68°F / max: 77°F
Where should you go swimming in China in the month of september?
Swimming in China in september is ideal (in the best case scenario)
In september in China swimming conditions vary by city. Details below:
In september in Hong Kong Island, Hong Kong, Hainan island (Haikou), Kowloon, Tai Po, Wenzhou, Beihai, Fuzhou, Hailing island, Hainan, Hebao Island, Cheung Chau, Lamma Island, Kinmen, Macao, Matsu Islands, Victoria Peak , Repulse Bay beach, Sanya, Shek O Beach, Shenzhen, Wanshan islands, Xiamen, Ningbo, Quanzhou, Shantou and Zhoushan, swimming conditions are perfect! With water reaching a maximum of 86°F and an average of 83°F, going in the water (and staying there!) feels great.
As for Shanghai, Dalian, Qingdao, Hangzhou, Huludao, Panjin Honghaitan, Nantong and Yantai, swimming is pleasant in september. The sea water is 78°F on average (min: 73°F/max: 83°F) so you can easily spend time in the water.
Where to go swimming in China in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Hong Kong Island
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 14.4in | ||
| Number of days of precipitation | 15 jour(s) (49%) | ||
| Cloud cover | 37% | ||
| Our opinion | ideal swimming |
More information on swimming in Hong Kong Island in september
Hong Kong
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 14.4in | ||
| Number of days of precipitation | 15 jour(s) (49%) | ||
| Cloud cover | 37% | ||
| Our opinion | ideal swimming |
More information on swimming in Hong Kong in september
Shanghai
| September | |||
| Average sea temperature | 78°F | ||
| Minimum sea temperature | 73°F | ||
| Maximum sea temperature | 83°F | ||
| Average outside temperature | 81°F | ||
| Maximum outside temperature | 83°F | ||
| Minimum outside temperature | 77°F | ||
| Precipitation | 6.8in | ||
| Number of days of precipitation | 8 jour(s) (26%) | ||
| Cloud cover | 43% | ||
| Our opinion | pleasant swimming |
More information on swimming in Shanghai in september
Dalian
| September | |||
| Average sea temperature | 72°F | ||
| Minimum sea temperature | 67°F | ||
| Maximum sea temperature | 77°F | ||
| Average outside temperature | 74°F | ||
| Maximum outside temperature | 76°F | ||
| Minimum outside temperature | 72°F | ||
| Precipitation | 2.3in | ||
| Number of days of precipitation | 3 jour(s) (11%) | ||
| Cloud cover | 23% | ||
| Our opinion | pleasant swimming |
More information on swimming in Dalian in september
Hainan island (Haikou)
| September | |||
| Average sea temperature | 83°F | ||
| Minimum sea temperature | 80°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 86°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 10.5in | ||
| Number of days of precipitation | 11 jour(s) (36%) | ||
| Cloud cover | 35% | ||
| Our opinion | ideal swimming |
More information on swimming in Hainan island (Haikou) in september
List of coastal cities in China
| Hong Kong Island in september | ideal swimming |
| Hong Kong in september | ideal swimming |
| Shanghai in september | pleasant swimming |
| Dalian in september | pleasant swimming |
| Hainan island (Haikou) in september | ideal swimming |
| Kowloon in september | ideal swimming |
| Qingdao in september | pleasant swimming |
| Tai Po in september | ideal swimming |
| Wenzhou in september | ideal swimming |
| Beihai in september | ideal swimming |
| Fuzhou in september | ideal swimming |
| Hailing island in september | ideal swimming |
| Hainan in september | ideal swimming |
| Hangzhou in september | pleasant swimming |
| Hebao Island in september | ideal swimming |
| Huludao in september | pleasant swimming |
| Cheung Chau in september | ideal swimming |
| Lamma Island in september | ideal swimming |
| Kinmen in september | ideal swimming |
| Macao in september | ideal swimming |
| Matsu Islands in september | ideal swimming |
| Panjin Honghaitan in september | pleasant swimming |
| Victoria Peak in september | ideal swimming |
| Repulse Bay beach in september | ideal swimming |
| Sanya in september | ideal swimming |
| Shek O Beach in september | ideal swimming |
| Shenzhen in september | ideal swimming |
| Wanshan islands in september | ideal swimming |
| Xiamen in september | ideal swimming |
| Nantong in september | pleasant swimming |
| Ningbo in september | ideal swimming |
| Quanzhou in september | ideal swimming |
| Shantou in september | ideal swimming |
| Yantai in september | pleasant swimming |
| Zhoushan in september | ideal swimming |