Hydrographic and Oceanographic Department
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Yokosuka
Realtime tidal data at Yokosuka
About gauge and tidal data
Latitude: 35°17′N Longitude: 139°39′E Datum level: 110cm 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【 2026/04/16 】
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 |
| 0416 | 75 | 104 | 133 | 154 | 162 | 155 | 133 | 103 | 72 | 47 | 33 | 36 | 57 | 89 | 124 | 153 | 168 | 167 | 150 | 124 | 95 | 70 | 55 | 54 |
Observation data
Record of TidalHeight(cm) Location Yokosuka Longitude 139-39 Latitude 35-17 TimeZone -09 00(JST) TidalHeightDatum 110cm below mean sea level. a note: Broken or No transmit data ---> "9999" year date time cm 2026 04 16 00 00 762026 04 16 00 05 792026 04 16 00 10 822026 04 16 00 15 842026 04 16 00 20 862026 04 16 00 25 882026 04 16 00 30 922026 04 16 00 35 952026 04 16 00 40 982026 04 16 00 45 992026 04 16 00 50 1012026 04 16 00 55 1062026 04 16 01 00 1092026 04 16 01 05 1112026 04 16 01 10 1122026 04 16 01 15 1152026 04 16 01 20 1192026 04 16 01 25 1222026 04 16 01 30 1242026 04 16 01 35 1262026 04 16 01 40 1282026 04 16 01 45 1312026 04 16 01 50 1332026 04 16 01 55 1352026 04 16 02 00 1372026 04 16 02 05 1392026 04 16 02 10 1412026 04 16 02 15 1422026 04 16 02 20 1442026 04 16 02 25 1472026 04 16 02 30 1492026 04 16 02 35 1512026 04 16 02 40 1532026 04 16 02 45 1562026 04 16 02 50 1582026 04 16 02 55 1602026 04 16 03 00 1612026 04 16 03 05 1612026 04 16 03 10 1622026 04 16 03 15 1632026 04 16 03 20 1642026 04 16 03 25 1652026 04 16 03 30 1662026 04 16 03 35 1662026 04 16 03 40 1682026 04 16 03 45 1682026 04 16 03 50 1672026 04 16 03 55 1672026 04 16 04 00 1672026 04 16 04 05 1672026 04 16 04 10 1672026 04 16 04 15 1652026 04 16 04 20 1642026 04 16 04 25 1642026 04 16 04 30 1642026 04 16 04 35 1632026 04 16 04 40 1612026 04 16 04 45 1602026 04 16 04 50 1602026 04 16 04 55 1602026 04 16 05 00 1582026 04 16 05 05 1562026 04 16 05 10 1552026 04 16 05 15 1532026 04 16 05 20 1522026 04 16 05 25 1492026 04 16 05 30 1462026 04 16 05 35 1442026 04 16 05 40 1432026 04 16 05 45 1412026 04 16 05 50 1392026 04 16 05 55 1362026 04 16 06 00 1342026 04 16 06 05 1332026 04 16 06 10 1312026 04 16 06 15 1282026 04 16 06 20 1252026 04 16 06 25 1232026 04 16 06 30 1222026 04 16 06 35 1192026 04 16 06 40 1152026 04 16 06 45 1132026 04 16 06 50 1102026 04 16 06 55 1082026 04 16 07 00 1052026 04 16 07 05 1022026 04 16 07 10 992026 04 16 07 15 972026 04 16 07 20 962026 04 16 07 25 932026 04 16 07 30 892026 04 16 07 35 862026 04 16 07 40 842026 04 16 07 45 812026 04 16 07 50 792026 04 16 07 55 772026 04 16 08 00 742026 04 16 08 05 722026 04 16 08 10 702026 04 16 08 15 692026 04 16 08 20 662026 04 16 08 25 632026 04 16 08 30 602026 04 16 08 35 592026 04 16 08 40 572026 04 16 08 45 562026 04 16 08 50 542026 04 16 08 55 522026 04 16 09 00 512026 04 16 09 05 502026 04 16 09 10 492026 04 16 09 15 472026 04 16 09 20 442026 04 16 09 25 432026 04 16 09 30 432026 04 16 09 35 422026 04 16 09 40 412026 04 16 09 45 402026 04 16 09 50 392026 04 16 09 55 382026 04 16 10 00 392026 04 16 10 05 392026 04 16 10 10 382026 04 16 10 15 382026 04 16 10 20 372026 04 16 10 25 382026 04 16 10 30 402026 04 16 10 35 402026 04 16 10 40 392026 04 16 10 45 402026 04 16 10 50 412026 04 16 10 55 422026 04 16 11 00 442026 04 16 11 05 442026 04 16 11 10 452026 04 16 11 15 482026 04 16 11 20 502026 04 16 11 25 512026 04 16 11 30 522026 04 16 11 35 532026 04 16 11 40 562026 04 16 11 45 582026 04 16 11 50 612026 04 16 11 55 622026 04 16 12 00 652026 04 16 12 05 682026 04 16 12 10 712026 04 16 12 15 732026 04 16 12 20 772026 04 16 12 25 782026 04 16 12 30 812026 04 16 12 35 842026 04 16 12 40 852026 04 16 12 45 892026 04 16 12 50 912026 04 16 12 55 942026 04 16 13 00 962026 04 16 13 05 1002026 04 16 13 10 1032026 04 16 13 15 1062026 04 16 13 20 1102026 04 16 13 25 1112026 04 16 13 30 1122026 04 16 13 35 1162026 04 16 13 40 1192026 04 16 13 45 1212026 04 16 13 50 1242026 04 16 13 55 1282026 04 16 14 00 1302026 04 16 14 05 1332026 04 16 14 10 1362026 04 16 14 15 1382026 04 16 14 20 1392026 04 16 14 25 1422026 04 16 14 30 1442026 04 16 14 35 1442026 04 16 14 40 1462026 04 16 14 45 1482026 04 16 14 50 1502026 04 16 14 55 1532026 04 16 15 00 1552026 04 16 15 05 1562026 04 16 15 10 1582026 04 16 15 15 1612026 04 16 15 20 1632026 04 16 15 25 1642026 04 16 15 30 1652026 04 16 15 35 1652026 04 16 15 40 1662026 04 16 15 45 1662026 04 16 15 50 1672026 04 16 15 55 1662026 04 16 16 00 1672026 04 16 16 05 1672026 04 16 16 10 1682026 04 16 16 15 1692026 04 16 16 20 1682026 04 16 16 25 1672026 04 16 16 30 1672026 04 16 16 35 1682026 04 16 16 40 1662026 04 16 16 45 1652026 04 16 16 50 1632026 04 16 16 55 1632026 04 16 17 00 1632026 04 16 17 05 1622026 04 16 17 10 1612026 04 16 17 15 1612026 04 16 17 20 1612026 04 16 17 25 1602026 04 16 17 30 1592026 04 16 17 35 1572026 04 16 17 40 1532026 04 16 17 45 1522026 04 16 17 50 1492026 04 16 17 55 1462026 04 16 18 00 1422026 04 16 18 05 1422026 04 16 18 10 1412026 04 16 18 15 1392026 04 16 18 20 1382026 04 16 18 25 1342026 04 16 18 30 1342026 04 16 18 35 1332026 04 16 18 40 1292026 04 16 18 45 1262026 04 16 18 50 1242026 04 16 18 55 1222026 04 16 19 00 1182026 04 16 19 05 1172026 04 16 19 10 1162026 04 16 19 15 1122026 04 16 19 20 1112026 04 16 19 25 1102026 04 16 19 30 1082026 04 16 19 35 1072026 04 16 19 40 1042026 04 16 19 45 982026 04 16 19 50 962026 04 16 19 55 932026 04 16 20 00 902026 04 16 20 05 882026 04 16 20 10 862026 04 16 20 15 832026 04 16 20 20 812026 04 16 20 25 802026 04 16 20 30 782026 04 16 20 35 762026 04 16 20 40 732026 04 16 20 45 742026 04 16 20 50 722026 04 16 20 55 682026 04 16 21 00 642026 04 16 21 05 642026 04 16 21 10 632026 04 16 21 15 632026 04 16 21 20 612026 04 16 21 25 592026 04 16 21 30 592026 04 16 21 35 602026 04 16 21 40 592026 04 16 21 45 562026 04 16 21 50 532026 04 16 21 55 512026 04 16 22 00 522026 04 16 22 05 522026 04 16 22 10 492026 04 16 22 15 472026 04 16 22 20 492026 04 16 22 25 512026 04 16 22 30 512026 04 16 22 35 502026 04 16 22 40 502026 04 16 22 45 99992026 04 16 22 50 99992026 04 16 22 55 99992026 04 16 23 00 99992026 04 16 23 05 99992026 04 16 23 10 99992026 04 16 23 15 99992026 04 16 23 20 99992026 04 16 23 25 99992026 04 16 23 30 99992026 04 16 23 35 99992026 04 16 23 40 99992026 04 16 23 45 99992026 04 16 23 50 99992026 04 16 23 55 9999