Facebook

Login

Support Sailonline

If you haven't already - join the SAILONLINE YACHT CLUB!

Please also consider making a donation - all amounts are greatly appreciated!

Board » General Discussion » Weather

Hi all. Can someone please explain from where the weather data is provided in SoL? I can see it's Weathertech, but my Swedish isn't all it could be. :-)

Is it GFS, taken straight from a forecast, or is it manipulated/assessed in any other way?
My understanding is that the weather comes directly from NOAA.

Some manipulation is done when a new wx is loaded to the game, namely the firs hour is interpolated from the "old" wx to the "new" wx so there is no discontinuity.

Maybe someone who knows better the stuff under the hood can explain this better.
My opinions may have changed, but not the fact that I'm right.
I can't say I know everything about it either, but I can confirm that NOAA's GFS is used for all races (in the past some different (more detailed) models were used for specific regions).

Sol cuts out the piece that is needed for the race, and when it is a large area it removes a large part of the datapoints, i.e. instead of 0.5⁰ resolution, sol can use 1⁰ or even 2⁰ resolution, so that the wx files keep manageable for everyone.

I don't know much about the smoothing from one Wx to the next, but since I've never seen weird jumps in TWS/TWD, there must be some smoothing.

Please login to post a reply.

Races

Next Race: 00d 00h 00m


Current Races:

Palk Bay TIMED Race 2026

This month’s TIMED race takes us to the shallow waters of Palk Bay located between India and Sri Lanka. Sail the impressive MC 38 around a roughly 140 nm course through two narrow channels before returning to the start/finish line in Jaffna.
This is a TIMEDrace so you may RE-REGISTER HEREto try again after finishing a run. You will have two weeks to test your skill and decision making after the race opens.
Race #2054
INFOby brainaid.de
PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking:
TRQ3 - TRCH - SYC
RACE CLOSE: Saturday,
29 August at 23:00 UTC
Race starts: Aug 16th 12:00 Registration will open soon
▶ Flash
GO TO RACE

The British Isles Circumnavigation 2026


The British Isles Circumnavigation is here! Inviting skippers to take on an epic 1,720nm clockwise voyage around Britain and Ireland! Starting and finishing in Cowes, the course passes some of the most iconic landmarks in offshore sailing, including Fastnet Rock, Tearaght Lighthouse, Black Rock, St. Kilda and Muckle Flugga before the long run home. Racing in our fast and versatile TP52, this Super-Buddy Championship race will reward smart routing, changing weather strategy and sustained concentration over every mile. Good luck!
Race #2052
INFO by brainaid.de
TP-52 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SUPBUD - SYC
Race starts: Aug 09th 10:00 Registration Closed
▶ Flash
GO TO RACE

Easter Island to Tristan da Cunha 2026

Welcome to the second leg of our RNW series, rounding Cape Horn. This middle-most leg Round the New World, from Easter Island to Tristan da Cunha, is also part of our Ocean Championship, and as such the second race of OCQ3 2026. This race, like the previous race in the RNW series, will be sailed in our revised 'version 2' Imoca 60 Foil. Race #2050
INFO by brainaid.de
Imoca 60 Foil v2 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: OCQ3 - RNW - OCCH - SYC
RACE CLOSE: Sunday,
August 23 at 2300 UTC.
Race starts: Aug 03rd 11:00 Registration Closed
▶ Flash
GO TO RACE

Go to race archive

SYC Ranking

  1. Sailonline Yacht Club Member KaSToR
  2. Sailonline Yacht Club Member CriticalHippo
  3. Sailonline Yacht Club Member WRmirekd
  4. Sailonline Yacht Club Member Panpyc
  5. Sailonline Yacht Club Member rafa
  6. Sailonline Yacht Club Member cdhinman
  7. Sailonline Yacht Club Member rthinman
  8. Sailonline Yacht Club Member ms0689
  9. Sailonline Yacht Club Member BRENTGRAY
  10. Sailonline Yacht Club Member Sax747

View full list

Series

Mobile Client

SYC members have the benefit of access to our mobile/lightweight web client!

The mobile client