Query global and regional forecasts, ensembles, satellite and radar data, land-surface hydrology, atmospheric composition, and reanalysis actuals as they become available, then use the same API for forecast history. GribStream lets your application ask for exactly the weather data it needs: coordinates, time ranges, calculated fields, condition filters, and CSV, JSON, or NDJSON output.
Three pillars that keep the data fast, the API simple, and the pricing predictable.
Fetch fresh forecasts, reanalysis actuals, or months of hourly history for tens of thousands of points in one HTTP request, in seconds.
Simple API, open-source clients and clear documentation. Try it in minutes.
Predictable pricing and high throughput. Query only the weather fields you need, when you need them.
Customer stories
Quotes marked as drafts are shown for layout review. Final quotations will use customer-approved language.
Gribstream has been a reliable provider of weather data for the Chicago White Sox. Their API is well documented, and their support team is consistently responsive, knowledgeable, and effective. Access to high-quality weather data has been a valuable resource for our analytics initiatives.
Draft copy
GribStream’s comprehensive data coverage and broad model selection dramatically accelerated our development of a custom automated forecasting system tailored to U.S. ski resorts.
GribStream gives SkewTLogPro reliable access to the forecast-model data we need to deliver detailed aviation weather insights to pilots.
Developer workflow
Pick a dataset, coordinates, variables, and time range. GribStream returns tidy rows for applications, ML pipelines, dashboards, and research notebooks.
{
"fromTime": "2025-05-01T00:00:00Z",
"untilTime": "2025-05-02T00:00:00Z",
"coordinates": [{ "lat": 40.758, "lon": -73.985 }],
"variables": [{ "name": "TMP", "level": "2 m above ground", "info": "" }]
}Query current and historical forecasts with advanced filtering, expressions, and ensembles.
Query current forecasts, then use the same API for multi-year forecast history and backtesting.
Choose CSV, JSON, or NDJSON for streaming workflows.
Query any coordinates with flexible precision.
Request ranges or explicit timestamps.
Automatic selection of the best eligible run.
asOf model-run-time cutoff?Restrict queries to model runs generated at or before a chosen model-run timestamp.
Compute derived fields on the fly.
Filter by conditions instead of raw grids.
Full ensemble members and statistics.
Prompt, precise support from engineers who know the data.
Explore a focused cross-section of the catalog: live forecasts, ensemble predictions, observations, radar and weather analyses, reanalysis actuals, hydrology, and atmospheric composition. Open the full catalog for all dataset-level details.
Coverage
Deterministic forecasts, ensembles, seasonal products, waves, and analysis guidance across global domains.
Coverage
High-resolution and blended guidance for Europe, North America, and the western Pacific, including severe-weather probabilities.
Coverage
Satellite and radar observations, rapidly updated analyses, and reanalysis weather actuals for monitoring, verification, and historical workflows.
Coverage
Operational and experimental AI weather forecasts, deterministic and ensemble guidance, and research reforecasts.
Coverage
Hydrologic forecasts, atmospheric composition, air quality, aviation turbulence, and icing for focused operational workflows.
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.
Daily Limit: 48,000 credits
$9.90 / month
Daily Limit: 96,000 credits
$18.80 / month
Daily Limit: 192,000 credits
$35.70 / month
Daily Limit: 384,000 credits
$67.80 / month
Daily Limit: 768,000 credits
$128.80 / month
Daily Limit: 1,536,000 credits
$244.70 / month
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.
Cache hits are billed at 10 % of normal credits.
Ready to build
Create an account, run the Quick Start, or browse forecast coverage before wiring GribStream into your application.