Swimming in Vietnam in september 2025 Sea temperature by city in september
Do you want to go to the beach in Vietnam 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 Vietnam by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Vietnam in september 2025
Here, find the average sea temperature in Vietnam in september in several coastal cities.
North Vietnam in september
84°F
min: 81°F / max: 87°F
Do Son Beach (Vạn Hương)
85°F
min: 82°F / max: 89°F
Cat Ba island
85°F
min: 81°F / max: 89°F
Vietnam Central Coast in september
85°F
min: 81°F / max: 87°F
84°F
min: 81°F / max: 86°F
84°F
min: 82°F / max: 87°F
85°F
min: 81°F / max: 88°F
83°F
min: 81°F / max: 86°F
Bai Lang (Cham islands)
85°F
min: 82°F / max: 87°F
South Vietnam in september
84°F
min: 83°F / max: 86°F
Con Dao island
84°F
min: 82°F / max: 86°F
Long Hai Beach
84°F
min: 81°F / max: 86°F
Vũng Tàu
83°F
min: 81°F / max: 86°F
Can Tho
85°F
min: 83°F / max: 87°F
Rach Gia
84°F
min: 82°F / max: 86°F
Where should you go swimming in Vietnam in the month of september?
Swimming in Vietnam in september is ideal
In september in Vietnam swimming conditions are generally the same everywhere.
In september in Halong Bay, Hoi An, Nha Trang, Phu Quoc island (Koh Trol), Da Nang, Huế, Phan Thiet, Bai Lang (Cham islands), Bãi Xép Beach (An Chấn), Co Thach Beach (Bình Thạnh), Con Dao island, Do Son Beach (Vạn Hương), Dốc Lết Beach (Ninh Hòa), Cat Ba island, Ky Co Beach (Nhơn Lý), Long Hai Beach, Mũi Né, Phan Rang Beach, Thuan An Beach, Vũng Tàu, Can Tho, Phu Vang, Qui Nhon, Rach Gia, Tam Ky, Thanh pho Bac Lieu, Tra Vinh and Tuy Hoa, swimming conditions are perfect! With water reaching a maximum of 87°F and an average of 84°F, going in the water (and staying there!) feels great.
Where to go swimming in Vietnam in september: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in september
Halong Bay
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 11.7in | ||
| Number of days of precipitation | 12 jour(s) (42%) | ||
| Cloud cover | 37% | ||
| Our opinion | ideal swimming |
More information on swimming in Halong Bay in september
Hoi An
| September | |||
| Average sea temperature | 85°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 18.4in | ||
| Number of days of precipitation | 16 jour(s) (53%) | ||
| Cloud cover | 40% | ||
| Our opinion | ideal swimming |
More information on swimming in Hoi An in september
Nha Trang
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 81°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 9.4in | ||
| Number of days of precipitation | 15 jour(s) (48%) | ||
| Cloud cover | 35% | ||
| Our opinion | ideal swimming |
More information on swimming in Nha Trang in september
Phu Quoc island (Koh Trol)
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 83°F | ||
| Maximum sea temperature | 86°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 85°F | ||
| Minimum outside temperature | 83°F | ||
| Precipitation | 18.5in | ||
| Number of days of precipitation | 18 jour(s) (62%) | ||
| Cloud cover | 47% | ||
| Our opinion | ideal swimming |
More information on swimming in Phu Quoc island (Koh Trol) in september
Da Nang
| September | |||
| Average sea temperature | 84°F | ||
| Minimum sea temperature | 82°F | ||
| Maximum sea temperature | 87°F | ||
| Average outside temperature | 85°F | ||
| Maximum outside temperature | 88°F | ||
| Minimum outside temperature | 79°F | ||
| Precipitation | 18.4in | ||
| Number of days of precipitation | 16 jour(s) (53%) | ||
| Cloud cover | 40% | ||
| Our opinion | ideal swimming |
More information on swimming in Da Nang in september
List of coastal cities in Vietnam
| Halong Bay in september | ideal swimming |
| Hoi An in september | ideal swimming |
| Nha Trang in september | ideal swimming |
| Phu Quoc island (Koh Trol) in september | ideal swimming |
| Da Nang in september | ideal swimming |
| Huế in september | ideal swimming |
| Phan Thiet in september | ideal swimming |
| Bai Lang (Cham islands) in september | ideal swimming |
| Bãi Xép Beach (An Chấn) in september | ideal swimming |
| Co Thach Beach (Bình Thạnh) in september | ideal swimming |
| Con Dao island in september | ideal swimming |
| Do Son Beach (Vạn Hương) in september | ideal swimming |
| Dốc Lết Beach (Ninh Hòa) in september | ideal swimming |
| Cat Ba island in september | ideal swimming |
| Ky Co Beach (Nhơn Lý) in september | ideal swimming |
| Long Hai Beach in september | ideal swimming |
| Mũi Né in september | ideal swimming |
| Phan Rang Beach in september | ideal swimming |
| Thuan An Beach in september | ideal swimming |
| Vũng Tàu in september | ideal swimming |
| Can Tho in september | ideal swimming |
| Phu Vang in september | ideal swimming |
| Qui Nhon in september | ideal swimming |
| Rach Gia in september | ideal swimming |
| Tam Ky in september | ideal swimming |
| Thanh pho Bac Lieu in september | ideal swimming |
| Tra Vinh in september | ideal swimming |
| Tuy Hoa in september | ideal swimming |