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San Juan: water level history
Record1963–202557 years
Sea level trend2.16 mm/yrNo. 57 of 88
Great diurnal range0.48 mNo. 100
Highest water level1.32 m1989-09-18
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 2017 | 0.964 |
| August 2026 | 0.692 |
| September 1998 | 0.615 |
| June 2023 | 0.613 |
| November 2024 | 0.602 |
| October 2019 | 0.593 |
| October 2021 | 0.593 |
| January 2026 | 0.591 |
| July 2026 | 0.584 |
| October 2015 | 0.579 |
- 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 San Juan since 1963. Long-term sea level trend: 2.16 mm per year.