---
title: "Latest single observation"
method: GET
path: "/api/v1/environment/noaa-tides/latest"
tags: ["Environment"]
---

# Latest single observation

`GET /api/v1/environment/noaa-tides/latest`

Single-shot convenience endpoint: the latest observation at a given station for a given product. Default product is `water_level`. Equivalent to calling `/station/{id}/water-level?date=latest` with fewer ceremonial arguments. Returns `observation=null` when the station does not report the requested product. Attribution: NOAA CO-OPS Tides and Currents (api.tidesandcurrents.noaa.gov).

## Query parameters

- `station` string, required — 7-digit CO-OPS station identifier (required).
- `product` string — CO-OPS product: `water_level`, `air_pressure`, `air_temperature`, `water_temperature`, `wind`, `humidity`, `visibility`, `conductivity`, `salinity`.
- `datum` string — Datum for water-level queries. Ignored for products that do not accept a datum.
- `units` string — `metric` or `english`.

## Response `200`

Latest observation row wrapped in a small station context.

- EnvelopeNoaaTidesLatestPayload
  - `data` NoaaTidesLatestPayload, required — Convenience payload for the latest single observation.
    - `station_id` string, required — Station identifier queried upstream.
    - `station_name` string, nullable — Station name echoed upstream.
    - `lat` number, nullable — Station latitude in decimal degrees.
    - `lon` number, nullable — Station longitude in decimal degrees.
    - `product` string, required — CO-OPS product (`water_level` by default).
    - `datum` string, nullable — Datum used (when the product accepts a datum).
    - `units` string, required — Units used (`metric` or `english`).
    - `time_zone` string, required — Time zone used upstream (always `gmt` from Sugra).
    - `observation` NoaaTidesObservation — Single 6-minute (or hourly) observation row from the datagetter endpoint.
      - `data_time` string, nullable — Observation timestamp as ISO 8601 UTC (YYYY-MM-DDTHH:MM:SSZ).
      - `value` number, nullable — Observed value in the requested units (meters, Celsius, km/h, mbar, etc.).
      - `sigma` number, nullable — Standard deviation within the 6-minute sampling window (water-level only).
      - `flags` boolean[], nullable — Four CO-OPS quality flags: `[timeout, flat, trend, max_min_exceeded]`.
      - `flags_raw` string, nullable — Raw flags field as published upstream (4 comma-separated 0/1 digits).
      - `quality` string, nullable — Quality code: `p` preliminary (last 30-45 days) or `v` verified (older).
    - `attribution` string, required — Upstream attribution string.
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

[API](https://skmtc.net/sugra/apis/sugra-api.md) · [All operations](https://skmtc.net/sugra/apis/sugra-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/sugra/sugra-api/versions/4e2740743eb4/schema)