GET /finland/marine/sea-state
Wave height + period + temperature from sea-state estimation buoys in Finnish coastal waters.
curl https://nordapi.ee/api/v1/finland/marine/sea-state
{
"data": {
"dataUpdatedTime": "2026-05-21T20:01:01.706Z",
"features": [
{
"geometry": {
"coordinates": [
21.75745,
63.06555
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 2.9,
"lastUpdate": "2022-04-17T17:31:39Z",
"lightStatus": "OFF",
"seaState": "CALM",
"siteName": "Kelloniemi_2",
"siteNumber": 8659,
"siteType": "FLOATING",
"temperature": 10,
"trend": "NO_CHANGE",
"windWaveDir": 187
},
"siteNumber": 8659,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
22.91959,
59.82382
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": null,
"lastUpdate": "2026-05-21T20:00:53Z",
"lightStatus": "ON",
"seaState": null,
"siteName": "Hankon.p.ylem",
"siteNumber": 11337,
"siteType": "FIXED",
"temperature": 18,
"trend": null,
"windWaveDir": null
},
"siteNumber": 11337,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
22.92275,
59.82201
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": null,
"lastUpdate": "2026-05-21T20:00:48Z",
"lightStatus": "OFF",
"seaState": null,
"siteName": "Hankon.p.alem",
"siteNumber": 11639,
"siteType": "FIXED",
"temperature": 17,
"trend": null,
"windWaveDir": null
},
"siteNumber": 11639,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
21.36418,
60.7877
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 0.2,
"lastUpdate": "2023-08-28T09:31:32Z",
"lightStatus": "OFF",
"seaState": "CALM",
"siteName": "Hattukari",
"siteNumber": 20169,
"siteType": "FLOATING",
"temperature": 15,
"trend": "NO_CHANGE",
"windWaveDir": 143
},
"siteNumber": 20169,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
21.35563,
60.78513
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 3.7,
"lastUpdate": "2021-10-18T14:01:27Z",
"lightStatus": "OFF",
"seaState": "CALM",
"siteName": "Kipsi",
"siteNumber": 20243,
"siteType": "FLOATING",
"temperature": 10,
"trend": "NO_CHANGE",
"windWaveDir": 310
},
"siteNumber": 20243,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
29.87729,
62.61385
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 85.0,
"lastUpdate": "2026-03-03T20:02:11Z",
"lightStatus": "OFF",
"seaState": "CALM",
"siteName": "Talla",
"siteNumber": 20244,
"siteType": "FLOATING",
"temperature": 0,
"trend": "NO_CHANGE",
"windWaveDir": 56
},
"siteNumber": 20244,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
21.36511,
60.787
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 6.1,
"lastUpdate": "2025-11-27T10:01:35Z",
"lightStatus": "OFF",
"seaState": "LIGHT",
"siteName": "Nuhja",
"siteNumber": 20245,
"siteType": "FLOATING",
"temperature": 4,
"trend": "NO_CHANGE",
"windWaveDir": 80
},
"siteNumber": 20245,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
21.32726,
60.78331
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 5.0,
"lastUpdate": "2025-11-28T10:30:19Z",
"lightStatus": "OFF",
"seaState": "LIGHT",
"siteName": "Koivisto",
"siteNumber": 20249,
"siteType": "FLOATING",
"temperature": 7,
"trend": "NO_CHANGE",
"windWaveDir": 103
},
"siteNumber": 20249,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
21.24504,
61.10891
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 13.5,
"lastUpdate": "2022-11-01T15:01:57Z",
"lightStatus": "OFF",
"seaState": "LIGHT",
"siteName": "Rauma_1",
"siteNumber": 81731,
"siteType": "FLOATING",
"temperature": 18,
"trend": "NO_CHANGE",
"windWaveDir": 332
},
"siteNumber": 81731,
"type": "Feature"
},
{
"geometry": {
"coordinates": [
29.87832,
62.61415
],
"type": "Point"
},
"properties": {
"confidence": "GOOD",
"heelAngle": 84.9,
"lastUpdate": "2026-04-09T06:34:58Z",
"lightStatus": "OFF",
"seaState": "CALM",
"siteName": "Rihtniemi_aalto",
"siteNumber": 84482,
"siteType": "FLOATING",
"temperature": 5,
"trend": "NO_CHANGE",
"windWaveDir": 244
},
"siteNumber": 84482,
"type": "Feature"
}
],
"type": "FeatureCollection"
},
"success": true
}