GribStream

Fast & Efficient Historical Weather Forecast API

Leverage state-of-the-art weather model families from NOAA, ECMWF, and AI systems, including NBM with regional variants, RTMA Rapid Update (15m), HRRR sub-hourly, GEFS, CFS, IFS, and GraphCast, with full forecast history delivered at lightning-fast speed and an unbeatable price. GribStream isn't just another API; it's a weather-data cloud database, enabling advanced database-style queries with calculated fields and powerful filtering-so you can instantly search for specific weather conditions, not just raw data. Access and analyze global weather like never before, with the flexibility, transparency, and performance of a true SaaS platform.

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Built for speed and clarity

Three pillars that keep the data fast, the API simple, and the pricing predictable.

🚀 Blazing Fast

Tens of thousands of points at hourly rate, for months at a time in a single HTTP request, in seconds.

🛠️ Easy to Use

Simple API, open-source clients and clear documentation. Try it in minutes.

📈 Cost-effective

Killer pricing and performance. Extract only what you need. No need to download/archive-just consume the on-demand stream.

Available model families

Unified access to NOAA, ECMWF, and leading AI systems with consistent query semantics, including regional variants and fast-update sub-datasets.

Browse all models

IFS Family Integrated Forecasting System Deterministic, ensemble, and wave products for global decision support. Sub-datasets

Oper Ensemble Wave Wave Ensemble

AIFS Family AI Forecasting System ECMWF AI-based deterministic and ensemble global guidance. Sub-datasets

AIFS Oper AIFS Ensemble

NBM Family National Blend of Models Post-processed blend with multiple regional and oceanic grids. Sub-datasets

CONUS Alaska Hawaii Puerto Rico Guam Oceanic

RTMA / URMA Analysis & Actuals Surface analyses with both hourly and 15-minute fast-update products. Sub-datasets

URMA RTMA (Hourly) RTMA Rapid Update (15m)

HRRR Family High-Resolution Rapid Refresh Storm-scale short-range guidance with hourly and sub-hourly variants. Sub-datasets

HRRR (Hourly) HRRR Sub-hourly (15m)

RRFS Family Rapid Refresh Forecast System Next-generation rapid refresh deterministic and ensemble products. Sub-datasets

RRFS Deterministic RRFS Ensemble

GEFS Family Global Ensemble Forecast System Atmospheric members, summary fields, chemistry, and marine probabilities. Sub-datasets

Atmospheric Members Atmospheric Mean Chem Wave Prob

CFS Family Climate Forecast System Seasonal components across atmosphere, surface fluxes, isentropic fields, ocean, and climate-assimilation context. Sub-datasets

Pressure Radiative Fluxes Isentropic Ocean CDAS1

GFS Core Global Forecast / Analysis Core global deterministic forecast and global analysis context. Sub-datasets

GFS GDAS

RAP Rapid Refresh Frequent-cycle regional short-range guidance for operational nowcasting workflows. Dataset

RAP

GraphCast GraphCast (GFS) Google graph-neural global forecasts for rapid medium-range inference. Dataset

GraphCast GFS

FourCastNet FourCastNet (GFS) FNO-based global surrogate model for low-latency scenario generation. Dataset

FourCastNet GFS

Platform capabilities

Query historical and real-time forecasts with advanced filtering, expressions, and ensembles.

Historical archive

Multi-year archive with forecast runs going back years.

Flexible formats

Choose CSV, JSON, or NDJSON for streaming workflows.

Precise locations

Query any coordinates with flexible precision.

Time controls

Request ranges or explicit timestamps.

Best-run selection

Automatic selection of the best available run.

As-of time travel

Travel to any model cycle with as-of queries.

Derived fields

Compute derived fields on the fly.

Condition search

Filter by conditions instead of raw grids.

Ensemble support

Full ensemble members and statistics.

Expert support

Prompt, precise support from engineers who know the data.

Pricing plans

A Free Plan is available to get you started. Upgrade to one of our Pro plans for higher daily usage limits.

For larger-scale usage, customized plans, heavy backfills, higher performance, or additional features, contact us.

Pro Plan

Daily Limit: 48,000 credits

$9.90 / month

Pro Plan 2x

Daily Limit: 96,000 credits

$18.80 / month

Pro Plan 4x

Daily Limit: 192,000 credits

$35.70 / month

Pro Plan 8x

Daily Limit: 384,000 credits

$67.80 / month

Pro Plan 16x

Daily Limit: 768,000 credits

$128.80 / month

Pro Plan 32x

Daily Limit: 1,536,000 credits

$244.70 / month

Per request quota calculation

Credits are calculated from what is actually returned:

Credits = returned_valid_times * parameters * ceil(coordinates / 500)

In words: valid times returned, times the number of weather parameters, times bundles of 500 coordinates.

We do not charge for times that are not returned (for example, model-specific skipped horizons).

Examples:

If your response returns 24 valid times, with 2 parameters, for 700 coordinates: 24 * 2 * 2 = 96 credits
If your response returns 100 valid times, with 1 parameter, for 3,500 coordinates: 100 * 1 * 7 = 700 credits

GribStream caches requests with LRU expiration; cache hits are billed at 10 % of normal credits.

Start building now

Create a free account, then jump into Quick Start and full docs.

Get free API token Quick Start Documentation

Explore the data

Browse sample data and review the available models.

Browse Data Models

GribStream Fast & Efficient Historical Weather Forecast API