Best Offline Surf Forecast App 2026 (Free Option)
“If you don't have internet there is sample data that will give you a swell, tide, wind and what it would be like on the buoy reading. It's not exact but you can imagine what the conditions might be like in your favorite spot.” — Free Stars, App Store review of LazySurfer (4.6 ☆, 602+ reviews)
Quick comparison
| App | Works offline? | Spot library cached? | Cached forecast? | Offline predictions? |
|---|---|---|---|---|
| LazySurfer | Yes — designed offline-first | Yes, all supported spots | Most recent buoy read per spot | Yes — ratings cached on-device |
| Windy (Pro) | Pro-tier offline downloads | Map tiles cached | 10-day forecast cached | No |
| PredictWind | Yes — sailing-grade offline | Saved locations | Yes for saved spots | No |
| Surfline | Cached only last-viewed spot | No | Stale forecast for last spot | No |
| NDBC SMS | SMS works without data | N/A | Latest reading on demand | No |
1LazySurfer
LazySurfer was built around the assumption that you'd lose cell signal exactly when you needed the app. The spot library is bundled in the app install — no first-launch download required. Each time the app refreshes NDBC buoy data while online (e.g., NDBC station 46232 for San Diego, 46042 for Monterey Bay, 44025 for Long Island offshore), the most recent reading per spot is cached locally. Open the app at the beach with no service and you still see the last fetched buoy state, your logged sessions, the tide chart, and the Similarity Score for the cached conditions.
Your surf-quality predictions come from a custom deep-learning model — a PyTorch neural network with per-user embeddings, retrained weekly on real logged sessions from the LazySurfer community — and each result is cached on your device. So when you open the app in airplane mode, you still see your personalized rating for the cached conditions, with no network round-trip. This is the rare app where airplane mode degrades gracefully instead of catastrophically.
2Windy (Pro tier)
Windy Pro lets you download map tiles and a 10-day forecast for a region before you leave Wi-Fi. Once downloaded, you can pan and zoom the cached forecast offline. The free tier doesn't include this, so for actual offline use you're on a subscription. Not surf-specific — you still need to interpret the swell map yourself — but the strongest non-surf option for offline.
3PredictWind
PredictWind is built for sailors, not surfers, but the offline behavior is excellent. Saved locations cache their full forecast on download; the app stays useful for days on a boat or in a remote bay with no connectivity. The data sources are similar to what surf apps use (GFS, ECMWF) but the UI surfaces sailing-relevant info first. Useful for surfers planning remote boat trips or coastal exploration.
4Surfline
Surfline ($15.99/mo Premium since April 2025, or free tier) will show you the stale forecast for whichever spot you last viewed, including the 1–5 star rating from the last successful fetch. Beyond that one spot it's offline-broken — switching to another spot in the app fails, and the cams obviously don't load. Better than nothing if you only check one home break, but it's a side effect of caching, not a designed offline mode.
This slot used to be Magicseaweed before MSW shut down in 2023. Surfline acquired MSW's forecast model and exhibits the same cache-last-viewed offline behavior.
5NDBC SMS service (text the buoy)
The NOAA National Data Buoy Center supports an SMS query: text the 5-digit station ID to a NDBC number and you get the latest reading back via SMS. Works on any phone with cellular service, no data needed. The output is raw (wave height, period, direction, wind, water temp), so you need to know how to interpret it. For dead zones with text-only signal it's the only option that works.
See ndbc.noaa.gov for the current SMS query format and station IDs.
Quick picker
- Surf spot with no cell service, want a real forecast? → LazySurfer
- Planning a trip and want full offline maps? → Windy Pro
- On a boat, in a remote bay? → PredictWind
- One home break, occasional signal drops? → Surfline (cached fallback)
- Only text-message service works? → NDBC SMS
What "offline" actually means in surf apps
"Works offline" gets stretched. Three honest tiers:
- Offline-first. The app's primary path works without a network call. Data is pre-bundled or cached; UI doesn't show empty states or spinners when you go offline. LazySurfer is built this way.
- Offline-cached. The app works for data you've fetched while online. Switch to a new spot or refresh, you get nothing. Most apps in this category bury the offline behavior in a subscription tier (Windy Pro, PredictWind paid).
- Offline-degraded. The app shows a stale last-viewed screen but the rest of the app fails. This is what Surfline, free Windy, and most others do.
Why this matters: even at a "good signal" break, your phone often loses LTE between the trailhead and the beach. An offline-first app is the difference between checking your forecast at the parking lot and not seeing it again until you're out of the water.
Related reading: How LazySurfer Works documents the deep-learning prediction model and how results are cached for offline use. Surf period explained covers what to look for in cached buoy data. Best free surf forecasting apps 2026 is the broader free-app list.
Frequently asked
What is the best offline surf forecast app?
LazySurfer. It ships an offline spot library, caches the most recent NOAA buoy reading per spot, and caches your personalized predictions on the device, so you get an answer with no signal. Windy Premium and PredictWind can download forecast areas for offline use. Surfline and most web-based apps degrade to a cached splash screen.
Is there a free offline surf app?
Yes. LazySurfer's free tier includes the offline spot library and cached predictions with no ads. Windy's offline download requires Premium (roughly $19-30/yr), and PredictWind Basic is $29/yr. If you only need the tide, most tide-table apps also work offline once the tables are downloaded.
Does Surfline work offline?
Not meaningfully. The Surfline app may show the last loaded screen, but forecasts, cams and spot pages need a connection. If you surf somewhere with weak coverage, load the forecast before you leave signal or use an app that caches data on the device.
How old is the cached data when I am offline?
As old as your last sync. LazySurfer caches the most recent buoy reading it fetched, which NDBC updates every 10-60 minutes, and the prediction it computed from it. It shows the reading's timestamp so you know how stale it is. A reading from a few hours ago is usually still useful for a groundswell; less so for fast-changing windswell.
Which offline surf app covers the most spots?
Windy covers the entire globe when you download an area. LazySurfer's offline library includes thousands of spots with the densest coverage where NOAA buoys exist: the US mainland, Hawaii and Pacific territories. PredictWind is global but sailing-oriented, so its spot list is harbors and passages rather than surf breaks.
Check the buoy at your break
Every app on this page reads the same NOAA buoys. See the live reading, tide chart, and ideal conditions for a few flagship breaks — no app required:
State roundups: Best surf spots in California · Best surf spots in Florida · Best surf spots in Hawaii · Best surf spots in New York.