# NDBC Real-Time Data Service

**Canonical:** https://apis.io/apis/ndbc/realtime-data-service/  
**Provider:** NDBC — National Data Buoy Center — https://apis.io/providers/ndbc/  
**Base URL:** https://www.ndbc.noaa.gov/data/realtime2  
**Documentation:** https://www.ndbc.noaa.gov/faq/rt_data_access.shtml

NDBC Real-Time Data Service is one of 5 APIs that [NDBC — National Data Buoy Center](https://apis.io/providers/ndbc/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Real-Time, Buoys, Meteorological, Oceanographic, and Waves. The published artifact set on APIs.io includes API documentation.

Provides access to the last 45 days of meteorological and oceanographic observations from NDBC moored buoys and C-MAN coastal stations. Data files are served via HTTPS at https://www.ndbc.noaa.gov/data/realtime2/ and named by station identifier and measurement type (e.g., 41002.txt for standard meteorology, 41002.spec for spectral wave summaries). Measurement types include standard meteorology (wind, pressure, temperature, waves), continuous winds, spectral wave data (summaries, raw energy density, directional components), ADCP currents, oceanographic parameters, and tide data. Most stations report hourly; data typically appears within 25 minutes after the hour. Missing values are represented as MM.

## Machine-readable artifacts (5)

- **Documentation** — https://www.ndbc.noaa.gov/faq/rt_data_access.shtml
- **Documentation** — https://www.ndbc.noaa.gov/docs/ndbc_web_data_guide.pdf
- **Documentation** — https://www.ndbc.noaa.gov/faq/measdes.shtml
- **BaseURL** — https://www.ndbc.noaa.gov/data/realtime2/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/ndbc/refs/heads/main/apis.yml

## Other NDBC — National Data Buoy Center APIs (4)

- [NDBC Latest Observations Service](https://apis.io/apis/ndbc/latest-observations-service/)
- [NDBC Historical Archive Service](https://apis.io/apis/ndbc/historical-archive-service/)
- [NDBC THREDDS/OPeNDAP NetCDF Service](https://apis.io/apis/ndbc/thredds-netcdf-service/)
- [NDBC HF Radar Surface Currents Service](https://apis.io/apis/ndbc/hf-radar-service/)

## Tags

Real-Time, Buoys, Meteorological, Oceanographic, Waves, Winds, Temperature, Pressure

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ndbc/realtime-data-service/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ndbc/.