Country: USA
United StatesCanadaUnited Kingdom

Hartwell Lake water level history

Daily records since 2005 · Level today: 648.27 ft

Highest on record
664.85 ft
Jan 5, 2016
Lowest on record
637.61 ft
Dec 9, 2008
Today
648.27 ft
Oct 23, 2026
Years of data
22
since 2005

In short

Across 19 complete years, 2008 had the lowest average level (646.91 ft) and 2020 the highest (660.45 ft).

On average the lake is lowest in December (653.82 ft) and highest in May (658.79 ft).

Hartwell Lake level, all years

Loading chart…

Measured Normal range for the date (middle 50% of past years)

Each year's lowest and highest level

636644651659666200520082011201420172020202320262005: lowest 656.89 ft (2005-11-25), highest 662.65 ft (2005-04-05), average 660.18 ft, 298 days measured2006: lowest 651.75 ft (2006-12-22), highest 659.70 ft (2006-01-30), average 656.41 ft, 361 days measured2007: lowest 646.68 ft (2007-12-20), highest 658.86 ft (2007-03-26), average 654.46 ft, 357 days measured2008: lowest 637.61 ft (2008-12-09), highest 652.26 ft (2008-04-30), average 646.91 ft, 364 days measured2009: lowest 641.37 ft (2009-01-01), highest 662.12 ft (2009-12-05), average 654.08 ft, 340 days measured2010: lowest 653.95 ft (2010-11-29), highest 662.66 ft (2010-02-08), average 658.39 ft, 346 days measured2011: lowest 650.00 ft (2011-11-24), highest 661.18 ft (2011-05-16), average 655.47 ft, 328 days measured2012: lowest 644.78 ft (2012-12-15), highest 653.10 ft (2012-04-09), average 649.78 ft, 339 days measured2013: lowest 646.22 ft (2013-01-11), highest 664.65 ft (2013-07-09), average 658.28 ft, 365 days measured2014: lowest 654.23 ft (2014-12-23), highest 662.53 ft (2014-01-20), average 658.35 ft, 365 days measured2015: lowest 654.69 ft (2015-01-02), highest 663.26 ft (2015-12-31), average 658.08 ft, 365 days measured2016: lowest 648.94 ft (2016-12-31), highest 664.85 ft (2016-01-05), average 656.80 ft, 365 days measured2017: lowest 648.88 ft (2017-01-01), highest 654.06 ft (2017-06-05), average 651.93 ft, 365 days measured2018: lowest 650.02 ft (2018-01-08), highest 664.20 ft (2018-06-03), average 658.86 ft, 363 days measured2019: lowest 654.92 ft (2019-12-13), highest 662.69 ft (2019-02-25), average 658.87 ft, 364 days measured2020: lowest 657.02 ft (2020-11-29), highest 663.52 ft (2020-05-21), average 660.45 ft, 366 days measured2021: lowest 656.43 ft (2021-12-24), highest 662.43 ft (2021-10-17), average 659.85 ft, 365 days measured2022: lowest 653.77 ft (2022-11-23), highest 661.82 ft (2022-05-31), average 658.15 ft, 365 days measured2023: lowest 651.94 ft (2023-12-09), highest 661.94 ft (2023-05-01), average 657.47 ft, 365 days measured2024: lowest 653.12 ft (2024-01-05), highest 662.30 ft (2024-03-10), average 658.06 ft, 366 days measured2025: lowest 653.19 ft (2025-12-31), highest 660.48 ft (2025-04-28), average 657.96 ft, 350 days measured2026: lowest 648.60 ft (2026-10-21), highest 653.74 ft (2026-01-19), average 652.33 ft, 294 days measured
636644651659666200520112017202320262005: lowest 656.89 ft (2005-11-25), highest 662.65 ft (2005-04-05), average 660.18 ft, 298 days measured2006: lowest 651.75 ft (2006-12-22), highest 659.70 ft (2006-01-30), average 656.41 ft, 361 days measured2007: lowest 646.68 ft (2007-12-20), highest 658.86 ft (2007-03-26), average 654.46 ft, 357 days measured2008: lowest 637.61 ft (2008-12-09), highest 652.26 ft (2008-04-30), average 646.91 ft, 364 days measured2009: lowest 641.37 ft (2009-01-01), highest 662.12 ft (2009-12-05), average 654.08 ft, 340 days measured2010: lowest 653.95 ft (2010-11-29), highest 662.66 ft (2010-02-08), average 658.39 ft, 346 days measured2011: lowest 650.00 ft (2011-11-24), highest 661.18 ft (2011-05-16), average 655.47 ft, 328 days measured2012: lowest 644.78 ft (2012-12-15), highest 653.10 ft (2012-04-09), average 649.78 ft, 339 days measured2013: lowest 646.22 ft (2013-01-11), highest 664.65 ft (2013-07-09), average 658.28 ft, 365 days measured2014: lowest 654.23 ft (2014-12-23), highest 662.53 ft (2014-01-20), average 658.35 ft, 365 days measured2015: lowest 654.69 ft (2015-01-02), highest 663.26 ft (2015-12-31), average 658.08 ft, 365 days measured2016: lowest 648.94 ft (2016-12-31), highest 664.85 ft (2016-01-05), average 656.80 ft, 365 days measured2017: lowest 648.88 ft (2017-01-01), highest 654.06 ft (2017-06-05), average 651.93 ft, 365 days measured2018: lowest 650.02 ft (2018-01-08), highest 664.20 ft (2018-06-03), average 658.86 ft, 363 days measured2019: lowest 654.92 ft (2019-12-13), highest 662.69 ft (2019-02-25), average 658.87 ft, 364 days measured2020: lowest 657.02 ft (2020-11-29), highest 663.52 ft (2020-05-21), average 660.45 ft, 366 days measured2021: lowest 656.43 ft (2021-12-24), highest 662.43 ft (2021-10-17), average 659.85 ft, 365 days measured2022: lowest 653.77 ft (2022-11-23), highest 661.82 ft (2022-05-31), average 658.15 ft, 365 days measured2023: lowest 651.94 ft (2023-12-09), highest 661.94 ft (2023-05-01), average 657.47 ft, 365 days measured2024: lowest 653.12 ft (2024-01-05), highest 662.30 ft (2024-03-10), average 658.06 ft, 366 days measured2025: lowest 653.19 ft (2025-12-31), highest 660.48 ft (2025-04-28), average 657.96 ft, 350 days measured2026: lowest 648.60 ft (2026-10-21), highest 653.74 ft (2026-01-19), average 652.33 ft, 294 days measured
Lowest to highest that yearYear average2026 so far

One bar per year from the lowest to the highest daily level, with the year's average. Years with no bar have no daily record in the agency archive.

Lowest years

Years ranked by their lowest daily level.

  • 2008637.61 ft on Dec 9
  • 2009641.37 ft on Jan 1
  • 2012644.78 ft on Dec 15
  • 2013646.22 ft on Jan 11
  • 2007646.68 ft on Dec 20

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (294 days)652.33648.60Oct 21653.74Jan 19
2025657.96653.19Dec 31660.48Apr 28
2024658.06653.12Jan 5662.30Mar 10
2023657.47651.94Dec 9661.94May 1
2022658.15653.77Nov 23661.82May 31
2021659.85656.43Dec 24662.43Oct 17
2020660.45657.02Nov 29663.52May 21
2019658.87654.92Dec 13662.69Feb 25
2018658.86650.02Jan 8664.20Jun 3
2017651.93648.88Jan 1654.06Jun 5
2016656.80648.94Dec 31664.85Jan 5
2015658.08654.69Jan 2663.26Dec 31
2014658.35654.23Dec 23662.53Jan 20
2013658.28646.22Jan 11664.65Jul 9
2012649.78644.78Dec 15653.10Apr 9
2011 (328 days)655.47650.00Nov 24661.18May 16
2010658.39653.95Nov 29662.66Feb 8
2009654.08641.37Jan 1662.12Dec 5
2008646.91637.61Dec 9652.26Apr 30
2007654.46646.68Dec 20658.86Mar 26
2006656.41651.75Dec 22659.70Jan 30
2005 (298 days)660.18656.89Nov 25662.65Apr 5

Levels in feet. Partial years show the number of days with data.

Monthly averages

MonthAverageLowestHighest
January655.34641.37664.85
February656.16645.53663.47
March657.66646.13662.41
April658.41650.00662.65
May658.79651.49663.52
June658.50649.84664.20
July657.50647.85664.65
August656.31645.42662.57
September655.40644.55662.14
October654.95640.87662.43
November654.14638.07661.68
December653.82637.61663.26

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Daily levels as CSV (7,756 rows; credit the original agencies listed below)