Tropical Storm Son-Tinh (1809)
Times and heights of the maximum sea level and the maximum storm surge recorded at tide stations in Hong Kong during the passage of Son-Tinh
First passage (17 – 18 July)
| Station | Maximum sea level (above chart datum) |
Maximum storm surge (above astronomical tide) |
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| Height(m) | Date/Month | Time | Height(m) | Date/Month | Time | |
| Quarry Bay | 2.53 | 17/7 | 12:45 | 0.53 | 18/7 | 02:38 |
| Shek Pik | 2.59 | 17/7 | 12:45 | 0.64 | 18/7 | 01:22 |
| Tai Miu Wan | 2.47 | 17/7 | 12:27 | 0.57 | 18/7 | 02:15 |
| Tai Po Kau | 2.58 | 17/7 | 13:37 | 0.58 | 18/7 | 02:38 |
| Tsim Bei Tsui | 2.94 | 17/7 | 12:40 | 0.64 | 18/7 | 02:04 |
| Waglan Island | 2.54 | 17/7 | 12:35 | 0.49 | 18/7 | 01:59 |
Second passage (23 – 24 July)
| Station | Maximum sea level (above chart datum) |
Maximum storm surge (above astronomical tide) |
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| Height(m) | Date/Month | Time | Height(m) | Date/Month | Time | |
| Quarry Bay | 2.13 | 24/7 | 06:33 | 0.18 | 23/7 | 15:01 |
| Shek Pik | 2.24 | 24/7 | 06:04 | 0.23 | 23/7 | 18:24 |
| Tai Miu Wan | 2.06 | 24/7 | 05:44 | 0.21 | 23/7 | 15:01 |
| Tai Po Kau | 2.04 | 24/7 | 07:50 | 0.22 | 23/7 | 15:49 |
| Tsim Bei Tsui | 2.61 | 24/7 | 07:06 | 0.26 | 24/7 | 07:03 |
| Waglan Island | 2.14 | 24/7 | 06:03 | 0.14 | 23/7 | 15:08 |