...receive weather reports in English 07.33 UTC and 19.33 UTC. These are transmitted on traffic channels which are dependent on which area you are. Call Stockholm Radio on ch 16 for advice for suitable traffic channels.
If there are any gale warnings or navigational warnings these are sent on traffic channels as well but always announced on ch 16.
Stockholm Radio normally are very kind and helpful and if you call them on a traffic channel whenever you want, they will normally give you the lastest weather forecast.
Navtex is not so very useful in the Baltic sea. Sweden transmitts twice a day, but the reception is very weak and unrealible inshore, I assume you want to sail inshore, through the skerries.
Estonia and Poland transmitts Navtex as well but the transmissions and the receiving of them is rather unrealible. These stations main concern is also the weather in the eastern part of the Baltic sea.
Don´t hesitate to get in touch with me if you need further information about cruising in the Baltics!
The Swedish language forecasts are also worth listening to. They are in standardised form with few surprises so you can get to understand them after a while.
The English ones are in the form Navigation messages English then Swedish followed by forecasts English then Swedish. These forecasts are for largish sea areas.
the Swedish Forecasts go stepwise round the coast and you have to work out which headlands they are using to divide up the areas. Wind speeds are given in metres/sec. with probabilities of wind strengths over 10 m/sec. afterwards. The gales (kuhling) seem to be at force 7. The wind strengths they give seem to be what arrives - they dont seem to overestimate as I feel UK orecasts do.
Navtex seem to work in the south and north but not in the middle of Sweden.
It´s true that the forecasts in English go stepwise around the coast, but the steps have nothing to do with the headlands.
The areas are the different parts of the sea, like "Southeastern Baltic, Central Baltic, Northern Baltic" and so on.
These forecasts are the same as in the public radio (Swedish Radio Program 1) but translated into English.
I think you mix up with the coastal forecast on VHF (08.33 and 16.33, local time) which only is transmitted in Swedish and covers the areas close to the shore. These areas are divided by referring to to different parts of the headland, islands or lighthouses.
These forecasts will also give you the probalilities, in percent, for winds stronger than 10 m/s and 14 m/s.
In my experience these inshore forecasts are very detailed and realible and gives you a good picture of the expected weather when cruising along the coast.
Unfortunately these are only in Swedish but I´m quite sure Stockholm Radio will give you an translation for areas in concern upon request.