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Charleston (Customhouse Wharf) water levels in 2021
Annual rank6 / 107
vs. average22.0 cm
Highest monthly peak1.70 mNovember 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 8.0 | 5.9 | 2.1 | 1.26 |
| Feb | 12.5 | 7.4 | 5.1 | 1.22 |
| Mar | 13.6 | 8.6 | 5.0 | 1.31 |
| Apr | 12.7 | 16.0 | -3.3 | 1.40 |
| May | 10.2 | 14.4 | -4.2 | 1.26 |
| Jun | 12.6 | 17.7 | -5.1 | 1.39 |
| Jul | 10.2 | 18.0 | -7.8 | 1.40 |
| Aug | 14.2 | 20.0 | -5.8 | 1.27 |
| Sep | 26.3 | 35.2 | -8.9 | 1.41 |
| Oct | 29.2 | 36.2 | -7.0 | 1.39 |
| Nov | 28.8 | 28.3 | 0.5 | 1.70 |
| Dec | 12.5 | 8.9 | 3.6 | 1.37 |
Nearby years (cm vs. average)
+20.4
+16.7
+16.5
+25.5
+24.2
+22.0
+24.7
+27.3
+24.0
+18.0
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 6 of 107 years (22.0 cm vs. the period average).