NOAA NCEP GFS Wave (NOMADS)

Use in your agent

Probe NOAA NCEP GFS Wave NOMADS pages in memory. Checked against the provider's documentation on Nov 6, 2026.

Access

• No key. Use NOMADS grib-filter HTML/UI or NOMADS HTTP directory for gfswave GRIB files.

Request

curl -L -o gfswave-filter.html 'https://nomads.ncep.noaa.gov/gribfilter.php?ds=gfswave'

Format

GRIB2 wave-model fields selected through the NOMADS grib filter (dataset ds=gfswave); not JSON.

Load into pandas (in memory)

Needs Python 3 with requests and pandas. The provider's terms limit storage or leave it unclear, so this snippet does not write a file.

"""Probe NOAA GFS Wave NOMADS pages in memory (GRIB download is separate; writes no file)."""
import requests
import pandas as pd
rows = []
for url in ("https://nomads.ncep.noaa.gov/gribfilter.php?ds=gfswave", "https://www.nco.ncep.noaa.gov/pmb/products/wave/"):
    r = requests.get(url, timeout=60)
    r.raise_for_status()
    rows.append({"url": url, "status": r.status_code, "bytes": len(r.content)})
df = pd.DataFrame(rows)
print(df.to_string(index=False))
print("Use the grib-filter UI or NOMADS HTTP paths to download GRIB2 wave fields for the cycle you need.")

Run by us on 2026-11-06 (python 3 | requests). Result: NOMADS gfswave grib-filter and NCEP wave products pages returned HTTP 200 on 2026-11-06.

Limits

• Not stated numeric rate limit on the checked NOMADS/NCEP pages; keep downloads to the cycles you need.

Quirks

• This is GRIB model output, not a JSON REST API — do not invent endpoint paths.
• Distinct from noaa-ndbc-buoy-data (point observations) and noaa-ocean-prediction-center (charts).
• This snippet writes no file; it only probes the HTML entry points in memory.

Terms and attribution

• NWS disclaimer: information on NWS Web pages "are in the public domain, unless specifically noted otherwise, and may be used without charge for any lawful purpose."
• NCEP wave products / NOMADS expose GFS Wave (gfswave) GRIB fields via the grib filter; this probe does not store or cache GRIB payloads.

Sources

• https://www.nco.ncep.noaa.gov/pmb/products/wave/: “NCEP Data Products WAVE Models”
• https://www.weather.gov/disclaimer: “are in the public domain, unless specifically noted otherwise, and may be used without charge for any lawful purpose”