Weather

Important note

Whilst racing, weather data or services such as routing that are not free of charge or easily available to all boats are not allowed by Rule 41(c) (outside help) of the RRS. See Case 120 in the Case book. However, Case 120 clarifies that rule 41c may be changed for any particular race by the notice of race and sailing instructions.

What we use ...

Weather Maps and observations

It isn't all about Grib files - weather maps, satellite images and observations are at least as important.

From MyImage, observations in Expedition or Squid.

Another very good service is SailFlow.

Grib data

Global models

GFS

US. Available from Expedition, Saildocs or Squid. Expedition has higher resolution hourly data, but Saildocs is available earlier.

ICON

German. Available from Expedition.

GDPS

Canadian. Available from Expedition.

ECMWF

European. Expensive. Of less use now we have GFS FV3 and ICON.

Regional models

Invariably nested inside global or larger regional models.

HRRR & NAM

Very good models for the US. Available from Saildocs and Squid.

Arome

Meteo France. Very good for Europe. Available from Squid or link below.

HIRLAM &  Harmonie

Very good models for Europe. FMI, KNMI, SMHI and YR.no. available from Squid & MyGrib in Expedition or SMHI link below.

ICON EU & CosmoDE

Germany. A lot of people like these. Available from Squid or MyGrib in Expedition.

WRF

WRF models are almost a dime-a-dozen, but they can be very good.

The Expedition WRF is one of the best of course.

Access

Australian. Good, available by subscription from the BOM.

Oceanographic models

RTOFS - Global, available from Saildocs and Squid.

MyOcean - Europe, available from Squid.

WW3 - waves

Expedition contains current models for various areas.

Tidetech also provides various current products.

Expedition integrated weather & oceanographic data

Free

Expedition eGribs - GFS, ICON, GDPS and high resolution WRF models
Saildocs - GFS, WW3, NAVGEM, COAMPS & RTOFS
KNMI - Hirlam
MailASail
NOAA
NOAA GLERL - Great Lakes winds & currents
Norwegian weather office - Weather forecast from Yr, delivered by the Norwegian Meteorological Institute and NRK
OpenSkiron & OpenGrib
SMN Argentina

Bundesamt für Seeschifffahrt und Hydrographie - Baltic & North Sea tidal currents
Global marine networks

Subscription

Squid (Great Circle) - Global & regional models. As used by the Volvo Ocean Race.
Ocens
Predictwind
Theyr

Proudman - UK, North Sea, Mediterranean & Arabian Gulf tidal currents
SHOM - tidal currents for the French coast
Tidetech - global ocean & tidal currents
Winning Tides - Solent tidal currents

Other weather & oceanographic grib data

Free

Belgium
DWD - OpenData, COSMO & ICON 
ECMWF, reanalysis & ERA Interim
Environment Canada
Meteo France - Arpege & Arome
MeteoConsult
NCAR/UCAR
NOAA, RTOFS, WW3, Reanalysis, Degrib
SailFlow or SailFlow
Sailing Weather Service
UCAR AMPS
Weather365
Weather 4D Arome

Hong Kong tidal stream data
OSI Sea ice concentration

Subscription

BOM
CloudRun
Frivind
gribfiles.com
Norwegian weather office
Sailtactics
WetterWelt