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Nantucket water levels in 2021
Annual rank4 / 60
vs. average12.5 cm
Highest monthly peak1.28 mOctober 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 19.5 | 12.8 | 6.7 | 1.01 |
| Feb | 12.3 | 7.3 | 5.0 | 1.19 |
| Mar | 1.9 | 11.5 | -9.6 | 0.93 |
| Apr | 15.2 | 20.4 | -5.2 | 1.02 |
| May | 7.7 | 7.4 | 0.3 | 0.96 |
| Jun | 10.3 | 15.4 | -5.1 | 0.94 |
| Jul | 17.5 | 17.8 | -0.3 | 0.98 |
| Aug | 16.9 | 17.1 | -0.2 | 0.95 |
| Sep | 19.5 | 14.6 | 4.9 | 0.84 |
| Oct | 29.3 | 12.4 | 16.9 | 1.28 |
| Nov | 17.5 | 9.9 | 7.6 | 1.06 |
| Dec | 10.6 | 13.9 | -3.3 | 0.99 |
Nearby years (cm vs. average)
+8.8
+10.1
+9.4
+11.9
+11.0
+12.5
+11.1
+18.2
+18.1
+13.4
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 4 of 60 years (12.5 cm vs. the period average).