Best weather models for sailing the US East Coast
The Ilma catalogue lists 50 weather models that cover the US East Coast: 39 global and 11 regional or other. It also lists 16 wave and ocean models. 25 of the weather models have publication times in the catalogue. The finest grid among them is about 2.5 km (HRDPS).
The Gulf Stream, nor'easters, summer thunderstorms and tropical systems all affect this coast, and the wind against the stream can raise steep seas. Several high-resolution regional models cover the coast and are updated often, which is useful for short-term decisions. For tropical systems, follow the official advisories, and use models as extra guidance.
Weather models that cover the US East Coast
Sorted by grid size, finest first, then by name. This is not a ranking: a finer grid shows more detail but does not make a forecast more accurate. A model is listed when it covers at least half of the area.
| Model | Provider | Resolution | Run cycles |
|---|---|---|---|
| HRDPS | ECCC | ~1.3 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| NBM | NOAA / NWS | ~1.3 nm | Every hour |
| NDFD | NOAA / NWS | ~1.3 nm | Not catalogued yet |
| HREF / HiResW | NOAA / NCEP | ~1.6 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| HRRR | NOAA / NCEP | ~1.6 nm | Every hour |
| RRFS | NOAA | ~1.6 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| ARPEGE | Météo-France | ~3.8 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| ECMWF ENS | ECMWF | ~4.9 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| ECMWF IFS | ECMWF | ~4.9 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| RDPS | ECCC | ~5.4 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| REPS | ECCC | ~5.4 nm | Not catalogued yet |
| UKMO Global | Met Office | ~5.4 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| Aurora | Microsoft | ~5.9 nm | Not catalogued yet |
| ACCESS-G | Bureau of Meteorology | ~6.5 nm | Not catalogued yet |
| IMD GFS | India Meteorological Department | ~6.5 nm | Not catalogued yet |
| KIM | KMA | ~6.5 nm | Not catalogued yet |
| NAM | NOAA / NCEP | ~6.5 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| NCUM | NCMRWF | ~6.5 nm | Not catalogued yet |
| NEPS-G | NCMRWF | ~6.5 nm | Not catalogued yet |
| GFS | NOAA / NCEP | ~7 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| ICON | DWD | ~7 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| JMA GSM | JMA | ~7 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| RAP | NOAA / NCEP | ~7 nm | Every hour |
| GDPS | ECCC | ~8.1 nm | twice a day (00Z and 12Z) |
| SREF | NOAA / NCEP | ~8.6 nm | four times a day (03Z, 09Z, 15Z and 21Z) |
| NAVGEM | US Navy FNMOC | ~10 nm | Not catalogued yet |
| BAM / MONAN | CPTEC / INPE | ~11 nm | Not catalogued yet |
| MOGREPS-G | Met Office | ~11 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| CMA-GFS | China Meteorological Administration | ~13 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| FengWu | Shanghai AI Laboratory | ~13 nm | Not catalogued yet |
| GEFS | NOAA / NCEP | ~13 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| GEPS | ECCC | ~13 nm | twice a day (00Z and 12Z) |
| ICON-EPS | DWD | ~14 nm | twice a day (00Z and 12Z) |
| JMA GEPS | JMA | ~15 nm | Not catalogued yet |
| AIFS ENS | ECMWF | ~15 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| ECMWF AIFS | ECMWF | ~15 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| FourCastNet | NVIDIA | ~15 nm | Not catalogued yet |
| FuXi | Fudan University | ~15 nm | Not catalogued yet |
| GraphCast / GenCast | Google DeepMind | ~15 nm | Not catalogued yet |
| NOAA AI-GFS (AIGFS) | NOAA | ~15 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| Pangu-Weather | Huawei | ~15 nm | Not catalogued yet |
| ACCESS-GE | Bureau of Meteorology | ~18 nm | Not catalogued yet |
| AICON | DWD | — | Not catalogued yet |
| AIGEFS | NOAA / NCEP | — | Not catalogued yet |
| CMA-GEPS | China Meteorological Administration | — | Not catalogued yet |
| HGEFS | NOAA / NCEP | — | Not catalogued yet |
| NAEFS | NOAA / ECCC | — | Not catalogued yet |
| PEARP (ARPEGE ensemble) | Météo-France | — | Not catalogued yet |
| SL-AV | Hydrometcentre of Russia | — | Not catalogued yet |
| WeatherNext 2 | Google DeepMind | — | Not catalogued yet |
Wave and ocean models
| Model | Provider | Resolution | Run cycles |
|---|---|---|---|
| NWPS | NOAA / NWS | ~0.5 nm | Not catalogued yet |
| STOFS / P-ETSS | NOAA | ~0.5 nm | Not catalogued yet |
| DWD GWAM / EWAM / CWAM | DWD | ~2.7 nm | twice a day (00Z and 12Z) |
| Copernicus Global Ocean | Mercator Ocean / Copernicus Marine | ~4.9 nm | Not catalogued yet |
| Navy HYCOM / ESPC | US Navy | ~4.9 nm | Not catalogued yet |
| RTOFS | NOAA / NCEP | ~4.9 nm | once a day (00Z) |
| Met Office WAVEWATCH III | Met Office | ~5.4 nm | Not catalogued yet |
| MFWAM | Météo-France | ~5.4 nm | twice a day (00Z and 12Z) |
| ECMWF WAM | ECMWF | ~7.6 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| GFS-Wave | NOAA / NCEP | ~13 nm | four times a day (00Z, 06Z, 12Z and 18Z) |
| OSCAR | NOAA / ESR | ~13 nm | Not catalogued yet |
| AUSWAVE | Bureau of Meteorology | — | Not catalogued yet |
| GDWPS | ECCC | — | Not catalogued yet |
| JMA wave models | JMA | — | Not catalogued yet |
| OceanMAPS | Bureau of Meteorology | — | Not catalogued yet |
| RIOPS | ECCC | — | Not catalogued yet |
How to use several models
Compare at least two models, and look at the newest run of each. Where they agree, you can plan with more confidence; where they differ, treat the forecast as uncertain and keep a margin. Read Using several models and Which model for my area? for the method. Official forecasts and warnings come first.
Open the coverage map to check any point, or see all sailing regions.