| Monthly sea levels for PORTLAND | back | table | PDF plot | Text file | Statistics |
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| Statistics | Top |
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| Mean sea level = 0.575 (Average monthly means = 0.575) | |
| Maximum recorded level of 1.747 metres at 0248 hours 24/06/2025 | |
| Minimum recorded level of -0.330 metres at 0754 hours 27/12/2004 | |
| Standard deviation of the observations = 0.2549 metres | |
| Skewness = 0.1876 |