

Last updated: May 8, 2026
The fastest way to reach us is by email. We read every message and reply within two business days.
Email: support@swellwire.com
When you write in, please include the device and OS version (e.g. “iPhone 15, iOS 18.4”), the Swellwire app version, and a brief description of the issue. Screenshots help.
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This is almost always a sync issue. Try, in order:
All forecast and observation data comes directly from public NOAA sources. We don't use third-party brokers.
Marine forecasts get less accurate the further out they go. The first 72 hours are typically reliable; days 4–7 are directional; beyond that, treat the data as a planning aid, not a guarantee. Conditions can change quickly. Always verify with on-the-water observation before paddling out.
Email us with the spot name, the closest landmark, and ideally the latitude / longitude. We add and correct spots regularly.
GFS-Wave occasionally reports null values for grid cells very close to shore, in enclosed bays, or in regions with sea ice. Swellwire falls back to the nearest valid cell, but for some locations no nearby cell is available. Buoy and NWS data are usually still reported in those cases.
Try in this order:
The globe uses WebGL. If your device's graphics drivers are out of date, the canvas may render blank. Updating to the latest OS version usually fixes this. On older Android devices we recommend the 2D map view — switch projection from the globe menu.
This is almost always caused by an outdated app build talking to a newer backend. Update Swellwire to the latest version in the App Store or Play Store and try again. If it still fails, email us with the email address you tried to sign in with and the time of the attempt.
See our Privacy Policy for what we collect, how we store it, and your rights. We do not sell user data.
For press inquiries, partnership questions, or data licensing, please email hello@swellwire.com.