FloodRoute

King tide flood maps & alerts

Only for iPhone

Free · In‑App Purchases

iPhone

New in 2.0: post flood photos, see flooding live in your town, and get alerts for your street. The live flood map is now free for everyone. FloodRoute shows which coastal roads will flood at high tide, and when, and lets neighbors post what they're seeing. As featured in The Ark (Tiburon, CA). NEW IN 2.0 • Post flooding: take a photo of the water and FloodRoute adds the street, the time and the tide height. Share it to Instagram, Facebook, Nextdoor or a group text in one tap. Faces are blurred automatically. • Live flood photos: see what neighbors are posting right now, in every FloodRoute town. • Spotter profiles: tap a pen name to see a neighbor's flood photos, badges and Call it record. • Live water levels: forecasts follow the real water, not just the tide tables, so they catch the surges tables miss. In two years of testing, next-day forecasts landed within 3 inches of the real water 80% of the time. Tide tables alone: 28%. • Exact times and streets: scrub through the day and see which roads flood, and when the water drains. • Share live flood maps with anyone. They open in any browser, no app needed. • Map my town: ask for your town and rally your neighbors. The most-requested towns are added first. • Call it: guess how high the next big tide will get. NOAA's gauge decides who was closest, and the best callers top a 30-day leaderboard. • Badges: first on the street, Street Keeper, and thanks from neighbors. FREE FOR EVERYONE • Live flood map for your town • 7-day flood windows • Alerts before flooding in your town • Post and share flood photos • No account or login FLOODROUTE PRO • Alerts for your street: the roads around your home, hours ahead • Commute alerts: we check your actual route and tell you when to leave • Flood photos near you: a ping when a neighbor posts flooding near your places • Surge alerts: when the bay runs high, before the tide tables catch on • Up to 3 places: home, work and one more • 30-day flood planner • What-if simulator: see any tide or storm before it happens • A PRO badge on your posts New users get every Pro feature through their town's next big tide. After that, the map, town alerts and photo posting stay included, and Pro is available monthly or yearly. WHERE IT WORKS • Marin County, CA: Sausalito, Mill Valley, Tam Junction, Tiburon, Belvedere, Corte Madera, Larkspur, San Rafael, Santa Venetia, Novato • San Francisco, CA • Boston, MA • New York City, NY • Miami and Miami Beach, FL • Tampa, FL Not on the list? Tap "Map my town." HOW IT WORKS FloodRoute combines NOAA tide predictions and live water levels with high-resolution USGS lidar elevations for low-lying roads, then checks which stretches the water reaches. Predictions are calibrated against documented king tides, factor in recent rainfall in Marin County, and improve with every neighbor report. Every town also has 30 years of flood history at floodroute.com. DATA SOURCES • NOAA CO-OPS: tide predictions and live water levels • USGS 3D Elevation Program: road elevations • OpenStreetMap and Overture Maps: road geometry • FEMA National Flood Hazard Layer: flood zones • Open-Meteo: rainfall and barometric pressure • Neighbor reports and documented king tide flooding: calibration WHY I BUILT IT FloodRoute started with my Nextdoor neighbors in Marin County. I shared the idea and got nearly 200 requests in 24 hours. It's still built by one person, and Pro keeps the free map free. IMPORTANT SAFETY NOTICE FloodRoute provides estimates only and is not a substitute for official warnings. Conditions change quickly. Never drive or walk through flood water: turn around, don't drown. SUBSCRIPTION DETAILS Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Support: contact@axiomic.ai Follow @FloodRouteApp on X: https://x.com/floodrouteapp Terms of Service: https://floodroute.com/terms Privacy Policy: https://floodroute.com/privacy

  • 4.7
    out of 5
    13 Ratings

Shared flood forecasts now show the map: the roads that flood, in color, right on the card. Post it to Instagram, text it to neighbors or save it, and everyone sees exactly where the water's coming.

The developer, Axiomic, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

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    • Location
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Axiomic, LLC
Size
36.3 MB
Category
Navigation
Compatibility
Requires iOS 18.5 or later.
  • iPhone
    Requires iOS 18.5 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Axiomic, LLC