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Warmest sea in Vietnam in September

58 coastal locations in Vietnam ranked by their typical September sea temperature. Region-wide average in September: 29.6°C. The top of the list is where to find the warmest swimming this month.

Warmest in September

Hon Ne

30.3°C September mean in Vietnam

Regional September average

29.6°C

across all 58 coastal locations in Vietnam

Vs annual mean

+2.6°C

above the year-round regional average

What the Vietnam sea feels like in September

This water temperature is comparable to that of a swimming pool, but it might be higher than most open water swimmers prefer for serious swimming. Make sure to drink plenty of water before and after swimming and don't wear a wetsuit to avoid overheating.

Vietnam monthly average 23.0°C to 29.6°C
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  • Warmest month July 29.6°C
  • Coldest month February 23.0°C
  • Annual mean 27.0°C
  • Months above 20°C 12 of 12

Where September fits in the year

September sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Vietnam month rankings:

Vietnam sea temperature map (live)

The map shows today's latest reading at every Vietnam location. The list below is based on the typical September mean, useful for trip planning weeks or months ahead.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 warmest Vietnam locations in September

Sorted by the typical September mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location September mean
1 Hon Ne Thanh Hóa 30.3°C
2 Hon Me Khanh Hoa province 30.2°C
3 Hon Nieu Cua Lo 30.2°C
4 Cua Ba Lat Nam Định Province 30.2°C
5 Cua Cam Approaches (Hon Dau) Hải Phòng 30.1°C
6 Do Son Hải Phòng 30.1°C
7 Thanh Hoa 30.1°C
8 Apowan Hải Phòng 30.1°C
9 Hon Gay Quảng Ninh 30.1°C
10 Passe des Hydres Quảng Ninh 30.1°C
11 Vung Ang Hà Tĩnh 30.1°C
12 Vung Chua Quảng Bình 30.1°C
13 Chon May (Chumai) Thừa Thiên Huế 30.1°C
14 Haiphong 30.0°C
15 Hanoi 30.0°C
16 Quang Khe Quảng Bình 30.0°C
17 Loc Chuc San Quảng Ninh 30.0°C
18 Cat Ba 30.0°C
19 Tsieng Mun Quảng Ninh 30.0°C
20 Tuan Chau 30.0°C
21 Thuan An Thừa Thiên Huế 30.0°C
22 Sha Pak Wan Quảng Ninh 30.0°C
23 Ha Long Bay 30.0°C
24 Da Nang 29.9°C
25 Hue 29.9°C
Show 25 more ▸
26 Cam Pha 29.9°C
27 Hoi An 29.9°C
28 Thuan An Beach 29.9°C
29 Cu Lao Cham Quảng Nam 29.8°C
30 Ile Bach Long Vi Hải Phòng 29.8°C
31 Kikuik Quảng Ngãi 29.8°C
32 Cham Islands 29.8°C
33 Tarn Kwam Bình Định 29.7°C
34 Qui Nhon-A Bình Định 29.6°C
35 Quy Nhon 29.6°C
36 Song Cau 29.6°C
37 Port Dayot Khánh Hòa 29.5°C
38 Vung Ro Phú Yên 29.5°C
39 Nha Trang 29.3°C
40 Ha Tien tỉnh Kiên Giang 29.3°C
41 An Thoi 29.2°C
42 Phu Quoc 29.2°C
43 Ho Chi Minh City 29.2°C
44 Vung Tau 29.2°C
45 Mui Can Gio Thành phố Hồ Chí Minh 29.2°C
46 Con Dao Islands 29.1°C
47 Poulo Condore Ba Ria - Vung Tau 29.1°C
48 Hon Tho Chau Kiên Giang 29.1°C
49 Mui Vung Tau Bà Rịa - Vũng Tàu 29.1°C
50 Pulau Cecir De Mer Bình Thuận 28.9°C

Coldest 10 in Vietnam in September

Same data the other way. Helpful if you want to know which Vietnam coasts to avoid for swimming in September.

# Location September mean
1 Pointe de Lagan Bình Thuận 28.5°C
2 Mui Ne 28.6°C
3 Phan Thiet 28.6°C
4 Pointe De Ke Ga Bình Thuận 28.7°C
5 Cam Ranh 28.7°C
6 Phan Rang 28.7°C
7 Lagi 28.8°C
8 Cap Padaran Ninh Thuận 28.9°C
9 Pulau Cecir De Mer Bình Thuận 28.9°C
10 Hon Tho Chau Kiên Giang 29.1°C

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