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Apra Harbor, Guam water levels in 2025
Annual rank1 / 73
vs. average20.8 cm
Highest monthly peak0.74 mMay 2025
Monthly mean vs. previous year
| Month | 2025 (cm) | 2024 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 15.0 | 9.7 | 5.3 | 0.55 |
| Feb | 18.5 | 12.2 | 6.3 | 0.57 |
| Mar | 23.3 | 18.7 | 4.6 | 0.66 |
| Apr | 29.2 | 17.7 | 11.5 | 0.72 |
| May | 31.5 | 23.7 | 7.8 | 0.74 |
| Jun | 27.4 | 23.5 | 3.9 | 0.70 |
| Jul | 31.8 | 24.7 | 7.1 | 0.70 |
| Aug | 25.2 | 26.2 | -1.0 | 0.61 |
| Sep | 23.3 | 22.6 | 0.7 | 0.67 |
| Oct | 20.4 | 17.4 | 3.0 | 0.59 |
| Nov | 22.3 | 9.8 | 12.5 | 0.66 |
| Dec | 21.1 | 12.8 | 8.3 | 0.60 |
Nearby years (cm vs. average)
+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 2025 annual mean water level ranked 1 of 73 years (20.8 cm vs. the period average).