Average difference between the day's highest high and lowest low tide over the next 30 days.
| Station | High tides | Low tides |
|---|---|---|
| Atlantic Heights | 12:37 AM 8.1 ft12:45 PM 9.1 ft | 6:24 AM -0.1 ft7:00 PM -1.0 ft |
| Dover Point | 1:33 AM 6.9 ft1:41 PM 7.8 ft | 7:23 AM -0.1 ft7:59 PM -0.8 ft |
| Dover, Cocheco River | 1:45 AM 7.1 ft1:54 PM 8.3 ft | 7:45 AM 0.3 ft8:23 PM -0.6 ft |
| Fort Point | 12:07 AM 9.3 ft12:16 PM 10.6 ft | 6:01 AM -0.1 ft6:38 PM -1.1 ft |
| Gosport Harbor, Isles of Shoals | 12:02 AM 9.2 ft12:10 PM 10.3 ft | 5:54 AM -0.1 ft6:30 PM -1.1 ft |
| Hampton Harbor | 12:14 AM 9.0 ft12:22 PM 10.1 ft | 6:28 AM -0.1 ft7:04 PM -1.1 ft |
| Jaffrey Point | 12:05 PM 10.6 ft | 5:51 AM -0.1 ft6:27 PM -1.1 ft |
| Portsmouth | 12:22 AM 8.5 ft12:30 PM 9.6 ft | 6:13 AM -0.1 ft6:49 PM -1.0 ft |
| Squamscott River RR. Bridge | 2:19 AM 7.4 ft2:27 PM 8.3 ft | 8:37 AM -0.1 ft9:13 PM -0.9 ft |