6343 Sea area S of Porkkala lighthouse
| Eiswinter | Anfang | Ende | Saisonlänge | Tage mit Eis | FL.Summe | Vol.Summe | max.Dicke | Restrictions |
| 2026 | 27.Jan 2026 | 16.Feb 2026 | 21 | 21 | 16.1 | 135.1 | 27.5 | nan | 21 | 21 | 21 | 21 | 21 | 16 | 0 | 0 | 0 | 0 |
| 2024 | 08.Jan 2024 | 21.Mar 2024 | 74 | 43 | 10.6 | 117.6 | 27.5 | nan | 43 | 43 | 43 | 43 | 43 | 34 | 0 | 0 | 0 | 0 |
| 2021 | 04.Feb 2021 | 07.Mar 2021 | 32 | 29 | 13.3 | 78.1 | 12.5 | nan | 29 | 29 | 29 | 29 | 29 | 24 | 0 | 0 | 0 | 0 |
| 2018 | 19.Feb 2018 | 06.Apr 2018 | 47 | 45 | 22.7 | 220.3 | 13.0 | nan | 45 | 45 | 45 | 45 | 45 | 16 | 0 | 0 | 0 | 0 |
| 2016 | 18.Jan 2016 | 26.Jan 2016 | 9 | 7 | 2.0 | 12.5 | 7.5 | nan | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2013 | 19.Jan 2013 | 10.Apr 2013 | 82 | 68 | 33.5 | 470.6 | 39.0 | nan | 68 | 68 | 68 | 68 | 68 | 0 | 0 | 0 | 0 | 0 |
| 2012 | 05.Feb 2012 | 15.Mar 2012 | 40 | 37 | 20.8 | 326.1 | 27.5 | nan | 35 | 35 | 35 | 35 | 35 | 30 | 0 | 0 | 0 | 0 |
| 2011 | 25.Dec 2010 | 12.Apr 2011 | 109 | 82 | 53.5 | 950.5 | 40.0 | nan | 80 | 80 | 80 | 80 | 80 | 58 | 0 | 0 | 0 | 0 |
| 2010 | 09.Jan 2010 | 09.Apr 2010 | 91 | 90 | 66.4 | 1119.0 | 28.0 | nan | 90 | 90 | 90 | 90 | 90 | 53 | 0 | 0 | 0 | 0 |
| 2009 | 01.Mar 2009 | 22.Mar 2009 | 22 | 12 | 3.5 | 32.1 | 12.5 | nan | 12 | 12 | 10 | 10 | 10 | 0 | 0 | 0 | 0 | 0 |
| 2007 | 11.Feb 2007 | 13.Mar 2007 | 31 | 23 | 12.6 | 129.7 | 13.0 | nan | 20 | 20 | 20 | 20 | 20 | 3 | 0 | 0 | 0 | 0 |
| 2006 | 05.Feb 2006 | 27.Apr 2006 | 82 | 74 | 53.2 | 924.3 | 27.5 | nan | 70 | 69 | 69 | 69 | 69 | 40 | 0 | 0 | 0 | 0 |
| 2005 | 24.Feb 2005 | 04.Apr 2005 | 40 | 39 | 29.2 | 276.4 | 12.5 | nan | 39 | 39 | 39 | 39 | 39 | 0 | 0 | 0 | 0 | 0 |
| 2004 | 23.Jan 2004 | 01.Apr 2004 | 70 | 55 | 27.2 | 176.4 | 13.0 | nan | 54 | 54 | 54 | 54 | 54 | 0 | 0 | 0 | 0 | 0 |
| 2003 | 29.Dec 2002 | 04.May 2003 | 127 | 117 | 98.5 | 2502.7 | 39.0 | nan | 115 | 115 | 115 | 115 | 115 | 89 | 0 | 0 | 0 | 0 |
| 2002 | 01.Jan 2002 | 07.Jan 2002 | 7 | 7 | 1.0 | 2.5 | 2.5 | nan | 4 | 4 | 4 | 4 | 4 | 0 | 0 | 0 | 0 | 0 |