Tide TablesHome › Tide tables & water levels › Philadelphia, US Coast Guard Station, Pa.
Philadelphia, US Coast Guard Station, Pa. water levels in 1999
Annual rank29 / 36
vs. average-6.8 cm
Highest monthly peak1.69 mSeptember 1999
Monthly mean vs. previous year
| Month | 1999 (cm) | 1998 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -8.9 | 8.2 | -17.1 | 1.60 |
| Feb | 2.3 | 18.6 | -16.3 | 1.17 |
| Mar | -9.4 | 9.3 | -18.7 | 1.36 |
| Apr | 2.2 | 14.7 | -12.5 | 1.27 |
| May | 5.7 | 22.7 | -17.0 | 1.25 |
| Jun | 0.7 | 10.7 | -10.0 | 1.22 |
| Jul | 1.5 | 6.7 | -5.2 | 1.38 |
| Aug | 7.3 | 6.0 | 1.3 | 1.24 |
| Sep | 13.0 | 5.8 | 7.2 | 1.69 |
| Oct | -0.8 | -3.4 | 2.6 | 1.27 |
| Nov | -9.8 | -8.7 | -1.1 | 1.60 |
| Dec | -11.6 | -12.3 | 0.7 | 1.34 |
Nearby years (cm vs. average)
-5.7
-9.8
+2.9
-3.7
+0.3
-6.8
-8.1
-8.9
-10.0
-0.6
-2.1
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1999 annual mean water level ranked 29 of 36 years (-6.8 cm vs. the period average).