 |
 |
Sea ice statistics.
- Observation : Japan Coast Guard offices and stations as follow
- Wakkanai, Monbetu, Abashiri, Rausu, Nemuro, Hanasaki
- Ice observation at Rausu is incomplete because of Japan Coast Guard office at Rausu is closed on weekends from 2008.
The first view of the sea ice
| Ice Year | Wakkanai | Monbetsu | Abashiri | Rausu | Nemuro | Hanasaki |
|---|---|---|---|---|---|---|
| 1996 | - | Feb.07 | Jan.31 | Feb.05 | Feb.11 | Mar.18 |
| 1997 | - | Jan.28 | Jan.24 | Jan.31 | Feb.03 | Mar.24 |
| 1998 | - | Jan.26 | Jan.25 | Feb.07 | Feb.12 | Mar.07 |
| 1999 | - | Feb.04 | Jan.17 | Jan.24 | Feb.14 | Apr.07 |
| 2000 | - | Jan.22 | Jan.26 | Feb.05 | Feb.10 | Mar.08 |
| 2001 | Jan.08 | Jan.08 | Jan.07 | Jan.18 | Jan.23 | Jan.28 |
| 2002 | - | Jan.30 | Jan.16 | Jan.18 | Feb.02 | - |
| 2003 | - | Jan.24 | Jan.11 | Jan.21 | Jan.23 | Feb.19 |
| 2004 | - | Feb.01 | Feb.01 | Feb.09 | Feb.17 | - |
| 2005 | - | Jan.23 | Jan.28 | Feb.08 | Feb.17 | - |
| 2006 | Apr.05 | Feb.03 | Jan.30 | Jan.30 | Feb.07 | Feb.20 |
| 2007 | - | Jan.20 | Jan.27 | Feb.25 | - | - |
| 2008 | Feb.25 | Jan.21 | Jan.21 | [Feb.25] | Feb.22 | Mar.04 |
| 2009 | - | Feb.10 | Feb.07 | [Mar.02] | Feb.24 | - |
| 2010 | - | Feb.08 | Jan.22 | [Feb.01] | - | - |
| 2011 | - | Jan.27 | Jan.20 | [Jan.31] | Feb.13 | Feb.17 |
| 2012 | Mar.09 | Feb.01 | Jan.20 | [Jan.27] | Jan.31 | - |
| 2013 | Feb.15 | Jan.17 | Jan.15 | [Jan.24] | Feb.01 | Feb.14 |
| 2014 | Feb.21 | Jan.27 | Jan.28 | [Feb.20] | Feb.22 | Mar.03 |
| 2015 | - | Jan.16 | Jan.16 | [Feb.17] | Feb.07 | Feb.18 |
| 2016 | - | Feb.09 | Feb.02 | [Mar.25] | - | - |
| 2017 | Jan.25 | Jan.26 | Jan.31 | [Feb.15] | Feb.25 | Mar.22 |
| 2018 | Feb.06 | Feb.01 | Jan.30 | [Feb.19] | Feb.19 | - |
| 2019 | - | Jan.28 | Jan.28 | [Feb.7] | Feb.12 | - |
| 2020 | Mar.6 | Jan.28 | Feb.7 | [Feb.15] | Mar.6 | Mar.8 |
| average (1991-2020) | Feb.20 | Jan.28 | Jan.26 | [Feb.10] | Feb.15 | Mar.04 |
The last view of the sea ice
| Ice Year | Wakkanai | Monbetsu | Abashiri | Rausu | Nemuro | Hanasaki |
|---|---|---|---|---|---|---|
| 1996 | - | Mar.24 | Apr.22 | Apr.21 | Mar.28 | Mar.22 |
| 1997 | - | Mar.17 | Mar.20 | Mar.31 | Mar.24 | Mar.24 |
| 1998 | - | Mar.21 | Mar.22 | Apr.09 | Mar.25 | Mar.17 |
| 1999 | - | Apr.12 | Apr.17 | Apr.30 | Apr.14 | Apr.07 |
| 2000 | - | Mar.24 | Apr.04 | Mar.28 | Apr.03 | Mar.30 |
| 2001 | Mar.08 | Mar.21 | Apr.07 | Apr.17 | Apr.02 | Feb.22 |
| 2002 | - | Mar.08 | Mar.16 | Mar.24 | Mar.02 | - |
| 2003 | - | Apr.14 | Apr.23 | Apr.27 | Apr.13 | Apr.06 |
| 2004 | - | Mar.09 | Mar.11 | Apr.01 | Mar.11 | - |
| 2005 | - | Mar.15 | Mar.19 | Apr.05 | Mar.12 | - |
| 2006 | Apr.05 | Apr.08 | Feb.16 | Feb.26 | Feb.23 | Feb.20 |
| 2007 | - | Mar.23 | Mar.06 | Feb.26 | - | - |
| 2008 | Feb.25 | Apr.08 | Apr.13 | (Apr.11) | Apr.14 | Mar.09 |
| 2009 | - | Mar.04 | Mar.08 | (Mar.04) | Feb.24 | - |
| 2010 | - | Mar.11 | Mar.12 | (Mar.04) | - | - |
| 2011 | - | Feb.19 | Mar.10 | (Mar.25) | Mar.09 | Feb.27 |
| 2012 | Mar.17 | Mar.31 | Apr.05 | (Apr.04) | Apr.01 | - |
| 2013 | Mar.07 | Mar.10 | Mar.21 | (Mar.12) | Mar.10 | Mar.08 |
| 2014 | Feb.23 | Apr.07 | Apr.30 | (Apr.30) | Apr.13 | Apr.09 |
| 2015 | - | Mar.15 | Mar.07 | (Mar.20) | Mar.07 | Mar.18 |
| 2016 | - | Mar.08 | Mar.18 | (Mar.29) | - | - |
| 2017 | Jan.25 | Mar.02 | Apr.20 | (Apr.07) | Apr.06 | Apr.08 |
| 2018 | Feb.06 | Feb.26 | Mar.27 | (Mar.27) | Feb.23 | - |
| 2019 | - | Feb.22 | Mar.6 | (Apr.1) | Mar.27 | - |
| 2020 | Mar.12 | Mar.27 | Apr.4 | (Apr.6) | Mar.10 | Mar.15 |
| average (1991-2020) | Mar.03 | Mar.21 | Mar.28 | [Apr.02] | Mar.21 | Mar.19 |