The main functions and tasks of NHCMF:

1. Formulating annual and long-term strategies, programs, plans related to hydro-meteorological forecasting.
   
2. Formulating regulations, rules, socio-technical standardization on hydro-meteorological forecasting.
   
3. Regular monitoring the hydro-meteorological conditions over the whole country and related areas.
   
4. Issuing hydro-meteorological forecasts, warnings and advisories as assigned for the disaster prevention and preparedness, socio-economic development, and national defense security.
   
5. Establishing and managing a telecommunication network to meet the requirements of hydro-meteorological forecasting in exchanging and transmitting hydro-meteorological data.
   
6. Providing consultancy and services on hydro-meteorological forecasting to organizations and private sectors under the current laws. 
   
7. Carrying out researches and applications of new technologies on hydro-meteorological forecasting.
   
8. Supplying instructions on operational hydro-meteorological forecasting and telecommunication; and validating the implementation of these instructions at Regional and Provincial Hydro-meteorological Centers.
   
9. Organizing training courses on operational hydro-meteorological forecasting and telecommunication.
   
10. Accomplishing international cooperation projects and programs on hydro-meteorological forecasting, data transmission and other related issues.