Welcome to the best weather forecast sites for the Channel Island and neighbouring Brittany and Normandy coasts based on my experience. So if you live in Guernsey or Jersey, this is the site for you!

There are now loads of weather forecast sites – these are my favourites.

Windguruwww.windguru.cz/ – tried and tested and works well. The GFS27km will give a 10 day forecast and the WRF 9km will provide a more detailed forecast for the new 3 days. It is available free or for an annual subscription which provides more up to date and better data. Not expensive so a worthwhile investment for a serious boater.

if you subscribe – you can set up “My Forecasts” which are sets of forecasts. I have sets of GFS27 and the same places for WRF9 so I can look long term and short term. For example I have a Northern Brittany dataset with

  • Guernsey
  • Jersey South Buoy
  • Carteret
  • Granville
  • Saint Malo
  • Saint Cast
  • Saint Quay
  • Lannion

This provides a really good indication of where the calmest weather is.

Windfinder – recently much improved and provides everything you could need. www.windfinder.com/forecast/gu…
It provides impressive information including wave heights and is free of charge. Works well as an App as well as on a web page.

Bookmark various pages with the weather. It works well.

Rain – The States of Jersey have a new rain radar which is very good – www.jerseymet.gov.je/Radar/Rad…

The local shipping weather forecast produced by the Jersey Met office, ideal for the last 2 days leading up to a trip – www.jerseymet.gov.je/forecast/…

Wind and Waves – Port of Jersey wind and wave information – a useful site – www.portofjersey.je/Pages/weat…

Other information

I have often wondered what Force 5 in the “North” means. Sounds like F5 in the Vale parish, but could be Alderney. A recent response to Martin Nickolls’ letter included the following information:
“The CI Shipping forecast area extends about 100 miles from latitude 50 degrees north to the Brittany coast. Often the wind speed in mid Channel (the north of the area) and near the Brittany coast (the south of the area) differ by two Beaufort forces, the difference between a safe passage or danger for a smaller boat.”

 

Great weather charts – Frank Singleton
weather.mailasail.com/Franks-W……

Magic Seaweed – magicseaweed.com/Guernsey-Surf…

www.myweather2.com/Marine/Glob……

There are lots of other sites. Some people like meteo consult but even though I subscribed to it – I found the results poor – marine.meteoconsult.co.uk/mari…

Others really like https://www.yr.no/

 

Current reports from Data Buoys
General – www.ndbc.noaa.gov/obs.shtml?la……
South of Jersey – www.ndbc.noaa.gov/station_page…
Channel Lightship – www.ndbc.noaa.gov/station_page…
Ouessant wave buoy – www.ndbc.noaa.gov/station_page…

Jersey

Channel Light Vessel

 

Wave information

When they say Moderate becoming Slight – what to they mean?
Smooth — Wave height less than 0.5 m
Slight — Wave height of 0.5 to 1.25 m
Moderate — Wave height of 1.25 to 2.5 m
Rough — Wave height of 2.5 to 4.0 m
Very rough — Wave height of 4.0 to 6.0 m
High — Wave height of 6.0 to 9.0 m
Very high — Wave height of 9.0 to 14.0 m
Phenomenal — Wave height more than 14.0 m