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Apra Harbor, Guam water levels in 2021
Annual rank3 / 73
vs. average17.2 cm
Highest monthly peak0.68 mMay 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 16.9 | -1.2 | 18.1 | 0.58 |
| Feb | 20.6 | 1.6 | 19.0 | 0.57 |
| Mar | 24.1 | 5.9 | 18.2 | 0.60 |
| Apr | 25.3 | 5.1 | 20.2 | 0.65 |
| May | 24.4 | 6.8 | 17.6 | 0.68 |
| Jun | 23.9 | 11.9 | 12.0 | 0.63 |
| Jul | 27.2 | 18.4 | 8.8 | 0.66 |
| Aug | 21.2 | 19.0 | 2.2 | 0.60 |
| Sep | 16.1 | 18.1 | -2.0 | 0.49 |
| Oct | 16.5 | 11.8 | 4.7 | 0.56 |
| Nov | 17.6 | 11.6 | 6.0 | 0.55 |
| Dec | 12.1 | 10.5 | 1.6 | 0.58 |
Nearby years (cm vs. average)
-0.7
+11.6
+4.8
+3.3
+6.7
+17.2
+15.9
+7.3
+15.0
+20.8
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 3 of 73 years (17.2 cm vs. the period average).