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NOAA OISST v2.1 · public domain

Sea-surface temperature API with anomaly, live.

SST and its anomaly for any ocean point — the Great Barrier Reef by default — from NOAA's OISST v2.1 quarter-degree analysis, with NCEI's own published anomaly and an honest marine-heatwave heuristic flag.

● live demo — Great Barrier Reef, latest analysiskeyless · POST /v1/batch · sst_anomaly
querying the live feed…
the heatwave flag is a simple anomaly-threshold heuristic (≥ +1.0 °C), not the formal Hobday MHW category — the response says so.

The call

Keyless. The anomaly is NCEI's own published value, not ours — and the response carries full provenance plus an Ed25519 signature.

# keyless — a named region, or any ocean 'lat,lon'
curl -X POST https://dynamicfeed.ai/v1/batch -H "Content-Type: application/json" \
  -d '{"calls":[{"tool":"sst_anomaly","args":{"region":"ningaloo"}}]}'

# MCP (keyless) — point any client at https://dynamicfeed.ai/mcp, then call:
sst_anomaly(region="great barrier reef")

Sample response

{ "queried": { "region": "Great Barrier Reef (central, QLD AU)" },
  "sst_c": 25.64, "anomaly_c": 1.01,
  "marine_heatwave_signal": "marine-heatwave conditions possible (anomaly >= +1.0 C)",
  "measured_date": "2026-06-10",
  "provenance": { "source": "NOAA/NCEI Optimum Interpolation SST (OISST) v2.1",
                  "licence": "US Government work — public domain" } }

Why live data

Thermal anomaly — how far the water is from its long-term normal — is the number that matters for coral bleaching risk, aquaculture stock stress and fisheries movement, and it's exactly what a frozen model can't know. This serves NOAA's OISST v2.1 analysis (the standard global SST record) with NCEI's own anomaly per quarter-degree cell, named regions for the places Australians ask about, and honest caveats: ~1–2 day analysis lag, grid-cell resolution, and a heatwave flag that's a labelled heuristic rather than a formal classification.

Use it for

FAQ

How fresh is the data?

OISST is a daily analysis published with a ~1–2 day lag; the response carries the analysis date and age so nothing pretends to be more current than it is.

Is the marine-heatwave flag official?

No — it's a simple anomaly-threshold heuristic (≥ +1.0 °C), clearly labelled in the response. The formal Hobday et al. 90th-percentile definition needs a full climatology percentile, which this doesn't compute.

Which regions are built in?

Great Barrier Reef (default), Moreton Bay, Tasmania, Ningaloo and more — or pass any ocean lat,lon and get the nearest quarter-degree cell.

What does it cost?

Keyless to try over MCP and POST /v1/batch; free REST key; paid plans from US$19/month — /#pricing. The underlying data is a US Government work in the public domain.

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