Great Lakes Average GLSEA Surface Water Temperature
| Lake Sup. | Lake Mich. | Lake Huron | Lake Erie | Lake Ont. |
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| 1994 | 1995 | 1996 | 1997 | 1998 |
| 1999 | 2000 | 2001 | 2002 | 2003 |
| 2004 | 2005 | 2006 | 2007 | 2008 |
| 2009 | 2010 | 2011 | 2012 | |
| Lake Sup. | Lake Mich. | Lake Huron | Lake Erie | Lake Ont. |
|
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| 1994 | 1995 | 1996 | 1997 | 1998 |
| 1999 | 2000 | 2001 | 2002 | 2003 |
| 2004 | 2005 | 2006 | 2007 | 2008 |
| 2009 | 2010 | 2011 | 2012 | |