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Boston water levels in 2021
Annual rank5 / 105
vs. average16.4 cm
Highest monthly peak2.46 mFebruary 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 17.0 | 11.5 | 5.5 | 2.28 |
| Feb | 10.5 | 7.2 | 3.3 | 2.46 |
| Mar | -0.6 | 11.4 | -12.0 | 2.13 |
| Apr | 14.4 | 21.5 | -7.1 | 2.35 |
| May | 6.9 | 7.9 | -1.0 | 2.13 |
| Jun | 9.4 | 13.9 | -4.5 | 2.10 |
| Jul | 17.2 | 17.0 | 0.2 | 2.14 |
| Aug | 15.8 | 14.9 | 0.9 | 2.16 |
| Sep | 16.2 | 11.9 | 4.3 | 1.90 |
| Oct | 26.5 | 11.3 | 15.2 | 2.06 |
| Nov | 13.7 | 7.2 | 6.5 | 2.17 |
| Dec | 8.1 | 12.4 | -4.3 | 2.20 |
Nearby years (cm vs. average)
+13.4
+14.0
+14.6
+16.4
+15.8
+16.4
+14.1
+22.7
+21.3
+15.9
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 5 of 105 years (16.4 cm vs. the period average).