Thoi-tiet. vn is a weather information service focused on Vietnam, helping users check current conditions and forecasts across the country. Its listings cover more than 38,000 localities in 63 provinces and cities, from provincial capitals to smaller communities.

Visitors can browse by location or use search to find local weather, with forecasts offered for today, tomorrow, and periods ranging from 7 to 14 days, as well as longer monthly outlooks. The service also provides hourly forecast details, information about the Sun and Moon, historical weather, and provincial weather pages. Current conditions include temperatures and summaries such as clear, cloudy, or rainy, with examples shown for locations including Hanoi, Da Lat, and Rach Gia.

Thoi-tiet. vn says its forecasts are built using open meteorological data from leading models, including ECMWF and ICON, and are updated hourly. It notes that forecasts are most reliable for the first one to three days, become clearer as dates approach, and rely on 60 years of climate statistics from day 17 onward