Surf Forecast Apps Compared: Swell Intel vs Surfline vs Windy
Different surf forecast apps are good at different things, and no single one wins on every dimension. This is an honest, hedged comparison of how the major options forecast, whether they publish accuracy, and what they cost — including where competitors are genuinely stronger than Swell Intel.
| Swell Intel | Surfline | Windy / Windguru (offshore readers) | |
|---|---|---|---|
| Forecast basis | Nearshore SWAN spectral physics run to high-resolution bathymetry at the break | Global/offshore wave models with spot-level forecasting and human forecaster input | Offshore model output (e.g. GFS/ECMWF) read at a point — you interpret the break yourself |
| Wave height shown | Breaking wave height modeled at the specific break | Spot-specific surf height (Surfline’s own scale) | Open-ocean significant wave height and swell components |
| Published accuracy verification | Yes — forecasts are recorded ahead of time and the raw predicted-vs-observed record publishes openly, misses included, once it matures | Not published as an open accuracy dataset | Not published (raw model output) |
| Forecast horizon | Up to 16 days | Multi-day; longer range on paid tiers | Depends on the underlying model run (typically ~7–16 days) |
| Surf cams | A growing set of free live cams, but a smaller network | Extensive HD cam network — the category leader here | Generally none |
| Community & editorial | Focused on the forecast; lighter editorial | Strong editorial, regional forecaster write-ups, and community — a real strength | Primarily a data tool, not editorial |
| Price | Free tier; Premium $2.99/month | Free tier; Premium subscription (see Surfline for current pricing) | Windy and Windguru offer free access with optional paid tiers |
What is the best surf forecast app?
There isn't one best surf forecast app for everyone — it depends on what you value. If you want the largest live-cam network and editorial coverage, Surfline is the strongest choice. If you want a breaking-wave-height forecast modeled at your specific break, with forecasts recorded ahead of time and the verification record published openly once it matures, Swell Intel is built for that. If you prefer to read raw offshore model data yourself, Windy and Windguru are excellent tools.
What is the most accurate surf forecast?
Accuracy claims are only meaningful when they're verified and published. Most surf forecast services don't publish an open accuracy dataset, so the honest answer is that the only objective basis for comparison is published verification. Swell Intel records each forecast before the swell arrives, scores it against what the wave stations reported, and publishes that forward verification record openly, misses included, once it spans a full month of wall-clock-recorded forecasts; where competitors don't publish comparable records, a like-for-like accuracy ranking isn't possible.
You can follow Swell Intel's forecast verification record on the forecast verification page, and read how the forecasts are produced in the forecasting methodology.
Where each app is strongest
Surfline has the deepest live-cam network and the most editorial and community content — if watching the lineup before you drive matters most, it's hard to beat, and it's a legitimately great product.
Windy and Windguru are outstanding for surfers who like to read offshore model data directly, compare model runs, and interpret the break themselves. They're powerful, flexible, and free to start.
Swell Intel focuses on modeling breaking wave height at the specific break with nearshore SWAN physics, and on verifying its forecasts — recording them ahead of time and publishing that record openly once it matures, so you can check the claims — at $2.99/month for Premium. It's the right pick if forecast method, breaking-height-at-the-break, and open verification matter more to you than the largest cam network.
Is Swell Intel better than Surfline?
They optimize for different things. Surfline leads on live cams, editorial, and community, and many surfers subscribe for the cams alone. Swell Intel focuses on nearshore-physics breaking wave height at the break and on verifying its forecasts — recording them ahead of time and publishing that record openly once it matures — and it costs $2.99/month. The better pick depends on whether cams or forecast method and price matter more to you.
Do I need a paid surf forecast app?
Not necessarily. Swell Intel, Surfline, Windy, and Windguru all offer free access to core forecasts. Paid tiers add things like extended range, more saved spots, and premium cams. Swell Intel’s Premium is $2.99/month for 16-day forecasts and extra features; the free tier still includes breaking wave height and the open verification record.
Competitor details reflect publicly available information and each service's own published pricing and features, which can change. Swell Intel isn't affiliated with Surfline, Windy, or Windguru. For current competitor pricing and features, check their official sites.