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New Hampshire Department of Environmental Services

New Hampshire Lake Ice-In and Ice-Out Records

Ice out at Highland Lake, Andover, NHThe NH NHDES VLAP began tracking Lake ice-in and ice-out dates in 2011 as there was no central repository for this information in New Hampshire. Many New Hampshire lakes have historical ice out records dating back to the early 1900's, Lakes Sunapee and Winnipesaukee to the 1880's, but not as much data exists for ice-in records. Tracking both ice-in and ice-out allows the determination of total ice cover days which is another important part of tracking physical, chemical and biological changes to lakes over time. With the erratic weather conditions experienced in recent years, the information can also help track climatological shifts and trends.

"Ice-out" is the term typically used to describe when the ice leaves a lake in the spring. Some consider this to be when the ice has melted and broken up enough to navigate a boat from one end of a lake or pond to the other, or when the lake is completely free of ice. Although ice-out definitions may vary slightly from lake to lake, the important thing is consistency and utilizing the same method to determine ice-out for your lake each year. "Ice-in" is the term used to describe when ice covers a lake in the fall. Ice-in can be more difficult to determine but typically is when the lake is completely or nearly completely covered with ice, however a thin skim of ice is not considered ice-in.

VLAP currently has records for approximately 50 New Hampshire lakes and hopes to add additional lakes to the database. To enter your lake's ice-in and ice-out data, utilize the new online form at Once the data for you lake have been entered, historical records are stored electronically and area available upon request for use in lake association publications, scientific research and articles. For additional information, please contact Sara Steiner, VLAP Coordinator, at If you experience any technical problems with the new form system, including sign-in issues, errors and general instruction on using this system, please contact


2017/2018 Ice In and Out Reports
Ice-In Date Ice-Out Date Total Days of Ice Cover Total Weeks of Ice Cover Lake Name Town
11/28/2017 4/24/2018 147 21.0 Lees Pond Moultonborough
11/29/2017 4/26/2018 148 21.1 Bearcamp Pond Sandwich
12/9/2017 2/26/2018 79 11.3 Powwow Pond East Kingston
12/13/2017 4/29/2018 137 19.6 Crescent Lake Acworth
12/15/2017 4/16/2018 122 17.4 Sunrise Lake Middleton
12/15/2017 4/18/2018 124 17.7 Halfmoon Lake Barnstead
12/15/2017 3/3/2018 78 11.1 Robinson Pond Hudson
12/16/2017 4/23/2018 128 18.3 Webster Lake Franklin
12/12/2017 4/24/2018 133 19.0 Balch Lake Wakefield
12/12/2017 4/25/2018 134 19.1 Hawkins Pond Center Harbor
12/15/2017       Kilton Pond Grafton
12/16/2017 4/1/2018 106 15.1 Swanzey Lake Swanzey
12/15/2017 4/23/2018 129 18.4 Highland Lake Andover
12/15/2017 4/26/2018 132 18.9 Mascoma Lake Enfield
12/15/2017 4/23/2018 129 18.4 Thorndike Pond Jaffrey
12/15/2017 4/28/2018 134 19.1 Lower Beech Pond Tuftonboro
12/16/2017       Silver Lake Hollis
12/16/2017 3/30/2018 104 14.9 Lake Massabesic Auburn
12/18/2017 4/9/2018 112 16.0 Clough Pond Loudon
12/27/2017       Pleasant Lake  New London
12/29/2017 4/29/2018 121 17.3 Lake Sunapee Sunapee
1/3/2018 4/26/2018 113 16.1 Lake Winnipesaukee  
12/14/2017 4/13/2018 120 17.1 Monomonac Lake Rindge
12/15/2017       Jenness Pond Northwood
1/2/2018 4/23/2018 111 15.9 Russell Reservoir Harrisville
12/12/2017 4/25/2018 134 19.1 Wicwas Lake Meredith
12/15/2017 4/17/2018 123 17.6 Lake Winnepocket Webster
  3/2/2018     Rock Pond Windham
  3/2/2018     Cobbetts Pond Windham
  3/24/2018     Pearly Pond Rindge
  3/28/2018     Angle Pond Sandown
  3/30/2018     Big Island Pond Derry
  3/30/2018     Swains Lake Barrington
  4/1/2018     Long Pond Danville
  4/3/2018     Ayers Lake Barrington
  4/4/2018     Laurel Lake Fitzwilliam
  4/5/2018     Wilson Pond Swanzey
  4/6/2018     Pleasant Pond Francestown
  4/13/2018     Spofford Lake Chesterfield
  4/19/2018     Tucker Pond Salisbury
  4/21/2018     Ossipee Lake Ossipee
  4/22/2018     Highland Lake Stoddard
  4/24/2018     Lake Wentworth  
  4/24/2018     Waukewan Lake Meredith
  4/24/2018     Canaan St. Lake Canaan
  4/25/2018     Chase Pond Wilmot
  4/25/2018     Bradley Lake Andover
  4/25/2018     Hunkins Pond Sanbornton
  4/26/2018     White Oak Pond Holderness
  4/29/2018     Ashuelot Pond Washington
  4/30/2018     Katherine Lake  Piermont
  4/30/2018     Baptist Pond Springfield
  5/1/2018     Armington Lake Piermont
  5/1/2018     Eastman Pond Grantham
  5/1/2018     Millen Pond Washington
  5/2/2018     Lake Tarleton Piermont
  5/4/2018     Pine River Pond Wakefield
  5/5/2018     Stinson Lake Rumney

NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

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