KaiCast Ocean Conditions

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Ocean conditions by location: water visibility, swell, wind, tide, plus dive and snorkel spot picks.

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best_day Read-only

Which day in a window (max 7 days) is best for an activity at a destination — a spot, a region, or lat+lon with a radius — and why, versus the runner-up. Returns every day's best score, confidence, caveats and a KaiCast spot card for the winner. Free during early access.

activitystring, required

What the user wants to do.

tostring

Window end, inclusive, at most 7 days. Default: from + 6.

latnumber

Latitude, decimal degrees. Use with lon.

lonnumber

Longitude, decimal degrees. Use with lat.

fromstring

Window start, spot-local. Default: today.

spotstring

Spot id, e.g. "hanauma-bay".

regionstring

Region id, e.g. "us-hi-oahu".

radius_kmnumber

Search radius around lat/lon in km (default 40, max 100).

Tools (4)

best_day

read-only

Argument	Type	Description
to	string	Window end, inclusive, at most 7 days. Default: from + 6.
lat	number	Latitude, decimal degrees. Use with lon.
lon	number	Longitude, decimal degrees. Use with lat.
from	string	Window start, spot-local. Default: today.
spot	string	Spot id, e.g. "hanauma-bay".
region	string	Region id, e.g. "us-hi-oahu".
activity*	string	What the user wants to do.
radius_km	number	Search radius around lat/lon in km (default 40, max 100).

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "activity"
  ],
  "properties": {
    "to": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Window end, inclusive, at most 7 days. Default: from + 6."
    },
    "lat": {
      "type": "number",
      "maximum": 90,
      "minimum": -90,
      "description": "Latitude, decimal degrees. Use with lon."
    },
    "lon": {
      "type": "number",
      "maximum": 180,
      "minimum": -180,
      "description": "Longitude, decimal degrees. Use with lat."
    },
    "from": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Window start, spot-local. Default: today."
    },
    "spot": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Spot id, e.g. \"hanauma-bay\"."
    },
    "region": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Region id, e.g. \"us-hi-oahu\"."
    },
    "activity": {
      "enum": [
        "snorkel",
        "dive",
        "freedive",
        "spearfish",
        "surf"
      ],
      "type": "string",
      "description": "What the user wants to do."
    },
    "radius_km": {
      "type": "number",
      "maximum": 100,
      "description": "Search radius around lat/lon in km (default 40, max 100).",
      "exclusiveMinimum": 0
    }
  }
}

get_conditions

Facts for ONE covered spot over up to 7 days: 3-hour forecast periods with condition score (0-100) and rating, water visibility (ft), swell height/period/direction, wind, tide state and height, water temperature, plus tide events and data quality. Pass a spot id, or lat+lon to use the nearest covered spot within 30 km. Free.

read-only

Argument	Type	Description
to	string	Last day, inclusive. At most 7 days after from. Default: from + 6.
lat	number	Latitude; snaps to the nearest covered spot within 30 km.
lon	number	Longitude; use with lat.
from	string	First day, spot-local YYYY-MM-DD. Default: today.
spot	string	Spot id, e.g. "electric-beach". Pass this OR lat+lon.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "to": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "Last day, inclusive. At most 7 days after from. Default: from + 6."
    },
    "lat": {
      "type": "number",
      "maximum": 90,
      "minimum": -90,
      "description": "Latitude; snaps to the nearest covered spot within 30 km."
    },
    "lon": {
      "type": "number",
      "maximum": 180,
      "minimum": -180,
      "description": "Longitude; use with lat."
    },
    "from": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "First day, spot-local YYYY-MM-DD. Default: today."
    },
    "spot": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Spot id, e.g. \"electric-beach\". Pass this OR lat+lon."
    }
  }
}

list_coverage

Which regions and spots KaiCast covers, and whether each region supports ranked decisions (spot picks and best-day answers) or facts only. Also lists supported activities and how directly each is modeled. Anywhere not listed is not covered. Free.

read-only

Argument	Type	Description
region	string	Limit to one region id.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "region": {
      "type": "string",
      "maxLength": 64,
      "minLength": 1,
      "description": "Limit to one region id."
    }
  }
}

recommend_spot

Ranked top picks (max 5) for an activity in one area on one day — by region id, or lat+lon with a radius. Each pick has the best daylight window, why (from the published conditions), a confidence score with its factors, caveats, and a KaiCast spot card. Returns status "not_covered" / "conditions_only" / "activity_not_modeled" honestly instead of guessing. Activities: snorkel (native model), dive, freedive, spearfish (proxy model; spots in water closed to spearfishing are excluded), surf (not modeled). Free during early access.

read-only

Argument	Type	Description
lat	number	Latitude, decimal degrees. Use with lon.
lon	number	Longitude, decimal degrees. Use with lat.
date	string	Spot-local day to plan for. Default: today, or tomorrow once today's daylight has passed. Up to 6 days ahead.
spot	string	Spot id, e.g. "hanauma-bay".
limit	integer	How many picks (default 3, max 5).
region	string	Region id, e.g. "us-hi-oahu".
activity*	string	What the user wants to do.
radius_km