Tidal harmonic constituents

GET

/api/v1/environment/noaa-tides/station/{id}/harmonic-constituents

Last modified:2026-05-10 09:22:39

Maintainer:Not configured

OperationId:environment_noaa_tides_station_id_harmonic_constituents

Published harmonic constituents for a CO-OPS station - 37 classical tidal constituents including M2, S2, N2, K1, O1, M4, K2, and others - with amplitude, phase (GMT and local), and angular speed. These are the inputs the prediction engine uses to synthesize tide levels, and are published so downstream researchers can reproduce predictions independently. Attribution: NOAA CO-OPS Tides and Currents (api.tidesandcurrents.noaa.gov).

Request

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API Key

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x-api-key

Example:

x-api-key: ********************

Path Params

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Shell

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HTTP

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Dart

curl --location '/api/v1/environment/noaa-tides/station/8518750/harmonic-constituents' \
--header 'x-api-key: <api-key>'

Responses

🟢200

application/json

Harmonic constituents table with amplitude, phase, and speed.

Bodyapplication/json

Example

{
    "data": {
        "station_id": "string",
        "units": "string",
        "count": 0,
        "constituents": [
            {
                "number": 0,
                "name": "string",
                "description": "string",
                "amplitude": 0,
                "phase_gmt": 0,
                "phase_local": 0,
                "speed": 0,
                "comments": "string"
            }
        ],
        "attribution": "string"
    },
    "meta": {
        "endpoint": "/api/v1/fred/us/cpi",
        "data_time": "2026-04-16T14:30:00Z",
        "response_time": "2026-04-16T14:30:12Z",
        "provider": "Sugra API v1.0.1",
        "source": "string",
        "fallback_used": true,
        "fallback_chain": [
            "string"
        ],
        "cached": true
    }
}

🟠401

🟠422

🟠429

🔴503

Modified at 2026-05-10 09:22:39

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