Golf deserves better weather data.

The story behind PinWeather — and why your phone's weather app isn't built for your round.

Every golfer has been there. The forecast said 62 and cloudy, so you showed up in pants and a quarter-zip. It's 78 and sunny. You're sweating through your sleeves by the third hole. The forecast wasn't wrong. It just wasn't for your golf course. It was for the airport 20 miles away.

That's the problem PinWeather was built to solve. Most weather apps pull data from the nearest reporting station — usually an airport or a city center — and call it close enough. But golfers know that “close enough” doesn't cut it when you're deciding whether to play, what to wear, or which club to pull.

“The weather at the airport isn't the weather at the first tee.”

PinWeather pins every forecast to your course's exact GPS coordinates using two of the world's best weather models: NOAA's HRRR at 1–2 km resolution for the next 48 hours, and ECMWF for a global 14-day outlook. We blend them intelligently — HRRR leads when it's strongest, ECMWF takes over for the extended forecast — so you always get the most accurate picture available.

But a forecast alone doesn't tell you how to play. That's why PinWeather translates weather into golf: how many yards you'll gain or lose from wind, temperature, and altitude for every club in your bag. It's the weather information golfers actually need — not just the information that's easy to display.

How the forecast works

HRRR for tomorrow. ECMWF for next week. Blended honestly.

The PinWeather Engine blends NOAA HRRR (1–2 km, best for 0–48 hour US forecasts) with ECMWF IFS (the gold-standard global model at 3–14 day range). For today and tomorrow we lean on HRRR. For day 2, we weight both equally. From day 3 forward, ECMWF dominates — that's where it consistently outperforms.

When the two models agree, you can plan with confidence. When they diverge, our score reflects whichever is more accurate at that range, and our 10-year historical data tells you what normal looks like for that specific course in this specific month.

The same model output goes through golf-specific scoring: temperature comfort, wind severity (including gust amplification), precipitation probability, and weather code severity. The output is a single 0–100 score per day, plus a 4-hour playing window finder, plus per-hour grades that map onto the chart.

2

Models blended

1 km

Forecast resolution

14-day

Forecast range

1,700+

US courses

Built by a golfer

PinWeather is built and maintained by a single developer who wanted a better answer to the question every golfer asks before every round: should I play today? No venture capital. No corporate weather data repackaged. Just a golfer building the tool he wished existed.

Try PinWeather

Check the forecast for your home course. No account required.

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