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Honolulu water levels in 2021
Annual rank7 / 114
vs. average9.9 cm
Highest monthly peak0.73 mDecember 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 10.5 | 7.8 | 2.7 | 0.65 |
| Feb | 11.5 | 2.8 | 8.7 | 0.62 |
| Mar | 7.6 | 7.6 | 0.0 | 0.48 |
| Apr | 4.7 | 8.6 | -3.9 | 0.55 |
| May | 4.3 | 10.7 | -6.4 | 0.57 |
| Jun | 7.0 | 16.5 | -9.5 | 0.61 |
| Jul | 4.9 | 22.1 | -17.2 | 0.58 |
| Aug | 11.8 | 19.9 | -8.1 | 0.63 |
| Sep | 9.0 | 21.2 | -12.2 | 0.52 |
| Oct | 6.3 | 22.5 | -16.2 | 0.43 |
| Nov | 6.4 | 18.1 | -11.7 | 0.59 |
| Dec | 6.9 | 15.0 | -8.1 | 0.73 |
Nearby years (cm vs. average)
+11.3
+15.4
+9.0
+10.1
+16.7
+9.9
+6.7
+7.0
+12.7
+11.2
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 7 of 114 years (9.9 cm vs. the period average).