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Charleston (Customhouse Wharf) water levels in 2025
Annual rank10 / 107
vs. average18.0 cm
Highest monthly peak1.68 mOctober 2025
Monthly mean vs. previous year
| Month | 2025 (cm) | 2024 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -6.4 | 5.0 | -11.4 | 1.09 |
| Feb | -0.6 | 16.6 | -17.2 | 1.07 |
| Mar | 0.2 | 14.4 | -14.2 | 1.16 |
| Apr | 1.1 | 8.1 | -7.0 | 1.48 |
| May | 7.5 | 18.6 | -11.1 | 1.37 |
| Jun | 2.6 | 17.9 | -15.3 | 1.24 |
| Jul | 11.8 | 9.7 | 2.1 | 1.43 |
| Aug | 30.4 | 18.4 | 12.0 | 1.52 |
| Sep | 36.4 | 41.3 | -4.9 | 1.42 |
| Oct | 43.5 | 32.4 | 11.1 | 1.68 |
| Nov | 9.8 | 24.8 | -15.0 | 1.37 |
| Dec | 6.7 | 8.0 | -1.3 | 1.33 |
Nearby years (cm vs. average)
+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 2025 annual mean water level ranked 10 of 107 years (18.0 cm vs. the period average).