Vietnam — Sea Water Temperature and Annual Ranges
Up-to-date sea water temperatures for the coasts of Vietnam. Learn about today’s conditions, monthly averages, and how the surrounding seas and oceans vary by season. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
Coastal Seas and Oceans
Water Temperature and Swimming Overview
Regions and Map
Water Temperature Trends
Vietnam’s long coastline offers a wide variety of sea temperatures depending on region and season. In the northern coast around Ha Long and the Gulf of Tonkin, water is coolest in winter, typically about 16–22 °C (61–72 °F), warming to roughly 24–30 °C (75–86 °F) in summer. Central coastal areas such as Da Nang, Hoi An and Nha Trang tend to be milder and more stable, with sea temperatures generally ranging from about 24–29 °C (75–84 °F) through the year and occasionally reaching 30–31 °C (86–88 °F) in the hottest months. The southern coast, including Phu Quoc and the Mekong Delta shoreline, stays warm year-round, usually between 26–30 °C (79–86 °F), with only small seasonal swings.
Swimming Conditions
Swimming is widely practiced and permitted along Vietnam’s beaches, and many coastal towns cater to swimmers and tourists. The most comfortable periods for bathing are the local dry seasons: late spring and summer in the north, and the long warm season in the central and southern regions. However, conditions can become unsafe during monsoon periods and typhoons when strong currents, high waves and sudden storms occur; beaches may be closed or lifeguards post warnings in such times. Water quality can vary near urban river mouths and ports, so choosing monitored public beaches is advisable. Jellyfish and rip currents are occasional hazards in some areas. Overall, if you time visits to coincide with regional dry seasons and heed local safety guidance, Vietnam’s coastal waters offer excellent and generally safe swimming opportunities.