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Charleston (Customhouse Wharf): water level history
Record1901–2025107 years
Sea level trend3.51 mm/yrNo. 27 of 88
Great diurnal range1.76 mNo. 44
Highest water level3.82 m1989-09-21
Annual mean water level vs. period average (cm)
Bars are relative to the lowest year on record.
Top 10 monthly highest water levels
| Month | Highest (m above MSL) |
|---|---|
| September 1989 | 2.927 |
| August 1940 | 2.229 |
| September 2017 | 2.113 |
| December 2023 | 2.049 |
| October 2016 | 1.937 |
| August 2023 | 1.912 |
| January 1987 | 1.794 |
| November 2018 | 1.773 |
| October 2015 | 1.747 |
| May 1934 | 1.742 |
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 2003
- 2002
- 2001
- 2000
- 1999
- 1998
- 1997
- 1996
- 1995
- 1994
- 1993
- 1992
- 1991
- 1990
Times and heights are NOAA astronomical predictions and do not include weather effects. Times are station local time (incl. daylight saving), heights in metres above MLLW. Not for navigation.
About this page
Monthly mean water levels at Charleston (Customhouse Wharf) since 1901. Long-term sea level trend: 3.51 mm per year.