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Hachijyoujima
Realtime tidal data at Hachijyoujima
About gauge and tidal data
Latitude: 33°08′N Longitude: 139°48′E Datum level: 81cm below mean sea level Obs. : tide observation by every 5 minutes Pred.: tide prediction by every 5 minutes Obs.-Pred. : difference between observation and prediction
Tidal curve【 2025/07/10 】
Hourly prediction
Unit：cm
Tidal harmonic constants
| month day | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 0710 | 108 | 117 | 128 | 136 | 137 | 130 | 113 | 90 | 64 | 40 | 24 | 20 | 28 | 46 | 70 | 96 | 117 | 132 | 138 | 135 | 126 | 114 | 104 | 99 |
Observation data
Record of TidalHeight(cm) Location Hachijyoujima Longitude 139-48 Latitude 33-08 TimeZone -09 00(JST) TidalHeightDatum 81cm below mean sea level. a note: Broken or No transmit data ---> "9999" year date time cm 2025 07 10 00 00 802025 07 10 00 05 832025 07 10 00 10 832025 07 10 00 15 842025 07 10 00 20 882025 07 10 00 25 862025 07 10 00 30 872025 07 10 00 35 922025 07 10 00 40 892025 07 10 00 45 922025 07 10 00 50 962025 07 10 00 55 922025 07 10 01 00 962025 07 10 01 05 972025 07 10 01 10 962025 07 10 01 15 992025 07 10 01 20 1012025 07 10 01 25 1012025 07 10 01 30 1012025 07 10 01 35 1042025 07 10 01 40 1042025 07 10 01 45 1032025 07 10 01 50 1062025 07 10 01 55 1092025 07 10 02 00 1072025 07 10 02 05 1102025 07 10 02 10 1122025 07 10 02 15 1112025 07 10 02 20 1132025 07 10 02 25 1132025 07 10 02 30 1152025 07 10 02 35 1142025 07 10 02 40 1182025 07 10 02 45 1182025 07 10 02 50 1162025 07 10 02 55 1192025 07 10 03 00 1192025 07 10 03 05 1172025 07 10 03 10 1192025 07 10 03 15 1212025 07 10 03 20 1182025 07 10 03 25 1212025 07 10 03 30 1222025 07 10 03 35 1212025 07 10 03 40 1222025 07 10 03 45 1232025 07 10 03 50 1212025 07 10 03 55 1222025 07 10 04 00 1232025 07 10 04 05 1232025 07 10 04 10 1222025 07 10 04 15 1222025 07 10 04 20 1242025 07 10 04 25 1212025 07 10 04 30 1222025 07 10 04 35 1232025 07 10 04 40 1202025 07 10 04 45 1202025 07 10 04 50 1202025 07 10 04 55 1202025 07 10 05 00 1192025 07 10 05 05 1182025 07 10 05 10 1182025 07 10 05 15 1162025 07 10 05 20 1162025 07 10 05 25 1142025 07 10 05 30 1152025 07 10 05 35 1112025 07 10 05 40 1122025 07 10 05 45 1112025 07 10 05 50 1092025 07 10 05 55 1092025 07 10 06 00 1072025 07 10 06 05 1042025 07 10 06 10 1032025 07 10 06 15 1022025 07 10 06 20 992025 07 10 06 25 992025 07 10 06 30 962025 07 10 06 35 942025 07 10 06 40 912025 07 10 06 45 892025 07 10 06 50 882025 07 10 06 55 852025 07 10 07 00 842025 07 10 07 05 822025 07 10 07 10 802025 07 10 07 15 792025 07 10 07 20 732025 07 10 07 25 752025 07 10 07 30 732025 07 10 07 35 682025 07 10 07 40 682025 07 10 07 45 662025 07 10 07 50 622025 07 10 07 55 632025 07 10 08 00 582025 07 10 08 05 572025 07 10 08 10 552025 07 10 08 15 522025 07 10 08 20 512025 07 10 08 25 492025 07 10 08 30 452025 07 10 08 35 432025 07 10 08 40 422025 07 10 08 45 382025 07 10 08 50 382025 07 10 08 55 362025 07 10 09 00 342025 07 10 09 05 332025 07 10 09 10 302025 07 10 09 15 292025 07 10 09 20 282025 07 10 09 25 242025 07 10 09 30 252025 07 10 09 35 252025 07 10 09 40 99992025 07 10 09 45 99992025 07 10 09 50 99992025 07 10 09 55 99992025 07 10 10 00 99992025 07 10 10 05 99992025 07 10 10 10 99992025 07 10 10 15 99992025 07 10 10 20 99992025 07 10 10 25 99992025 07 10 10 30 99992025 07 10 10 35 99992025 07 10 10 40 99992025 07 10 10 45 99992025 07 10 10 50 99992025 07 10 10 55 99992025 07 10 11 00 99992025 07 10 11 05 99992025 07 10 11 10 99992025 07 10 11 15 99992025 07 10 11 20 99992025 07 10 11 25 99992025 07 10 11 30 99992025 07 10 11 35 99992025 07 10 11 40 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