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High and Low Tide Predictions for a Station and Date (NOAA Tides & Currents)

noaacoops/tide-predictions

NOAA's published tide predictions for a station: the high and low tide times and heights, or the hourly predicted height, from a start date for 1 to 168 hours. Heights are above the chosen datum (MLLW by default), in metres or feet, with times in UTC unless you ask for the station's local time. Station ids are 7 digits, for example 8454000 for Providence, RI. Predictions are a harmonic model; real water levels differ with weather. NOAA Tides & Currents data, passed through unmodified and served by Omnial; not an official NOAA product and not for navigation.

activeper callv1

Price

$0.00273 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.

Data source

NOAA Tides & Currents

Data from NOAA's National Ocean Service, Center for Operational Oceanographic Products and Services (Tides & Currents), public domain per tidesandcurrents.noaa.gov/disclaimers.html. Served by Omnial; not an official NOAA product and not for navigation.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

Install itCreate an account
agent
// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "noaacoops/tide-predictions" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "noaacoops/tide-predictions" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "noaacoops/tide-predictions", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "noaacoops/tide-predictions", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

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Pricing

Every charge this tool can incur.

ChargePrice
Per call
$0.00273
Updated
Oct 18, 2026

Input and output schemas

Input schema
input_schema.json
{
  "type": "object",
  "required": [
    "station",
    "begin_date"
  ],
  "properties": {
    "datum": {
      "enum": [
        "MLLW",
        "MLW",
        "MSL",
        "MTL",
        "MHW",
        "MHHW",
        "NAVD"
      ],
      "type": "string",
      "default": "MLLW",
      "description": "The tidal datum the height is measured from. MLLW is mean lower low water, the usual chart datum; MSL is mean sea level; NAVD is the North American Vertical Datum. Defaults to MLLW. A station without the datum is a validation error."
    },
    "hours": {
      "type": "integer",
      "default": 24,
      "maximum": 168,
      "minimum": 1,
      "description": "How many hours to cover from the start of begin_date, 1 to 168 (one week). Defaults to 24, one day."
    },
    "units": {
      "enum": [
        "metric",
        "english"
      ],
      "type": "string",
      "default": "metric",
      "description": "metric is metres; english is feet. Defaults to metric."
    },
    "station": {
      "type": "string",
      "pattern": "^[A-Za-z0-9]{4,10}$",
      "description": "The NOAA CO-OPS station id, for example 8454000 (Providence, RI), 9414290 (San Francisco, CA) or 8518750 (The Battery, New York). An unknown station, or a Great Lakes station, is a validation error."
    },
    "interval": {
      "enum": [
        "hilo",
        "h"
      ],
      "type": "string",
      "default": "hilo",
      "description": "hilo returns only the high and low tides, each marked H or L; h returns the predicted height every hour. Defaults to hilo."
    },
    "time_zone": {
      "enum": [
        "gmt",
        "lst",
        "lst_ldt"
      ],
      "type": "string",
      "default": "gmt",
      "description": "What the `t` timestamps mean, and what midnight begin_date starts at: gmt is UTC; lst is the station's local standard time, ignoring daylight saving; lst_ldt is the station's local clock time including daylight saving. Defaults to gmt."
    },
    "begin_date": {
      "type": "string",
      "pattern": "^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$",
      "description": "The first day, YYYY-MM-DD. The window starts at 00:00 on this date, in the chosen time_zone. Past and future dates both work."
    }
  },
  "additionalProperties": false
}
Output schema
output_schema.json
{
  "type": "object",
  "required": [
    "predictions"
  ],
  "properties": {
    "predictions": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "t",
          "v"
        ],
        "properties": {
          "t": {
            "type": "string",
            "description": "Predicted time, 'YYYY-MM-DD HH:MM', in the requested time_zone. It carries no zone marker."
          },
          "v": {
            "type": "string",
            "description": "Predicted water level height above the datum, in the requested units, as a string."
          },
          "type": {
            "type": "string",
            "description": "H for a high tide or L for a low tide. Present for interval hilo only."
          }
        },
        "additionalProperties": true
      },
      "description": "One entry per high or low tide (hilo) or per hour (h), earliest first."
    }
  },
  "description": "NOAA CO-OPS's response: the predicted tides, in time order. Every field is a string.",
  "additionalProperties": true
}