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Marine Forecast

GET /marine/forecast

Get a multi-day marine weather forecast with hourly wave height, wave direction, wave period, and swell predictions. Configurable up to 7 days ahead. Useful for planning sailing routes, scheduling offshore work, timing surf sessions, and building marine safety alerting systems. Data from Open-Meteo marine forecast models.

Parameters

lat required

Latitude

lon required

Longitude

days optional default: 7

Days

Example Requests

Basic usage
curl "https://nordapi.ee/api/v1/marine/forecast?lat=59.9&lon=10.7"
7-day marine forecast for Oslo Fjord
curl "https://nordapi.ee/api/v1/marine/forecast?lat=59.9&lon=10.7"
3-day surf forecast for Bali
curl "https://nordapi.ee/api/v1/marine/forecast?lat=-8.72&lon=115.17&days=3"
5-day forecast for North Sea
curl "https://nordapi.ee/api/v1/marine/forecast?lat=56.0&lon=3.0&days=5"

Live Response 

{
  "data": {
    "daily": {
      "swell_wave_height_max": [
        0.12,
        0.08,
        0.04,
        null,
        null,
        null,
        null
      ],
      "time": [
        "2026-04-05",
        "2026-04-06",
        "2026-04-07",
        "2026-04-08",
        "2026-04-09",
        "2026-04-10",
        "2026-04-11"
      ],
      "wave_direction_dominant": [
        158,
        293,
        317,
        null,
        null,
        null,
        null
      ],
      "wave_height_max": [
        0.36,
        0.4,
        0.04,
        null,
        null,
        null,
        null
      ],
      "wave_period_max": [
        2.25,
        2.35,
        1.7,
        null,
        null,
        null,
        null
      ],
      "wind_wave_height_max": [
        0.36,
        0.4,
        0.04,
        null,
        null,
        null,
        null
      ]
    },
    "daily_units": {
      "swell_wave_height_max": "m",
      "time": "iso8601",
      "wave_direction_dominant": "°",
      "wave_height_max": "m",
      "wave_period_max": "s",
      "wind_wave_height_max": "m"
    },
    "elevation": 0.0,
    "generationtime_ms": 0.4998445510864258,
    "latitude": 59.875008,
    "longitude": 10.7083435,
    "timezone": "Europe/Oslo",
    "timezone_abbreviation": "GMT+2",
    "utc_offset_seconds": 7200
  },
  "success": true
}
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