LacNav
Swiss Lake Navigation
Built for Swiss Waters.
Every zone, every wind, every restriction — all offline.
Download on App Store See features →
Swiss Lake Navigation
Built for Swiss Waters.
The lake is calling. Don't get caught out.
LacNav knows Swiss waters the way a local does — every zone, every wind, every restriction. So you can focus on the water, not the rules.
Download on App Store See features →
All 8 major Swiss lakes
All lakes covered within one single app
Point-to-point navigation
Offline A→B routing
Wind overlay
Named winds & gusts
Zone overlay
Restricted zones & dynamic sport zones
LacNav map view
LacNav
LacNav
Built for Swiss waters
Get Started  →
Built for Swiss waters
Every lake. Every zone.
Every condition.
Dynamic Sport Spots New
On the right day, at the right spot, everything clicks. LacNav's proprietary formula reads live wind, weather, and conditions to highlight the best watersport windows on selected lakes — so you spend less time guessing and more time on the water.
Uferzone & Speed Alert
Swiss shore zones are strict — and fines aren't small. Every Uferzone is mapped and stored offline. The moment your speed exceeds the limit inside a zone, an audible alert fires. You stay legal without staring at the screen.
Weather at a Glance
Wind strength and direction. Water temperature. Wave height. UV index. A 6-hour forecast. Thunderstorm warnings. It's everything the lake tells an experienced skipper — now in one screen, available to everyone.
Weather & Overlays
Wind, current, and live rain radar — layered directly onto your chart. See where the Bise is pushing or the Föhn funnelling before you commit to a route. Thunderstorm cells move fast — a 10-minute radar refresh gives you time to reach harbour.
POI & Ferry Routes
Fuel running low? Looking for a lakeside lunch spot? Every marina, fuel station, and restaurant for all eight lakes is a tap away, with direct navigation. Ferry routes are charted too — so you always know who has right of way.
Works Without Signal
Once you've downloaded your lake, LacNav doesn't need a signal. Charts, zones, POI, weather cache — all there, whether you're in a marina with full bars or mid-lake with none.
Feature screenshot
In action
See what's
on screen.
LacNav navigation view
Navigation
Sport zones
Sport Spots
Speed zone alert
Zone Alerts
Weather overlay
Weather
Overlays
Overlays
Offline navigation
Offline Navigation
Why LacNav
Built for Swiss waters.
Not adapted from somewhere else.
Swiss-built
Most marine apps are built for oceans and adapted downward. LacNav started with Swiss lakes — the cantonal zones, the named winds, the seasonal sport restrictions, the ferry operators. Every detail comes from local knowledge, not approximation.
Always know where you stand
Swiss lakes are more regulated than they look. Speed zones are strict, Föhn conditions can change a crossing in minutes, and what's permitted on one shore isn't always permitted on the other. LacNav was built so you always know before you leave the harbour.
For every boater
Used by sailors, motorboaters, SUP riders, and day-trippers alike. Whether you know a lake by heart or you're visiting for the first time, LacNav gives you the same confidence a local takes for granted.
"Built for Swiss waters. Not adapted from somewhere else." — The LacNav team
Lake coverage
8 Lakes. 1 App.
From the Zürichsee at your doorstep to the Italian flair of Lago Maggiore — every major Swiss lake, covered in full detail. One purchase unlocks them all.
Zürichsee
40 km · 88 km²
The home lake. The Föhn turns glassy water into steep chop fast, and the Uferzone corridor is among the most enforced in Switzerland. ZSG ferry lines, every speed zone from Rapperswil to Bürkliplatz, and Föhn buildup alerts — all offline.
Lac Léman
73 km · 580 km²
Switzerland's sea. The Bise, the Vent du Lac, and the Séchard each behave differently — and the cantonal zones differ between Vaud and Geneva. Named wind alerts, live current overlay, and 200+ POI from Yvoire to Chillon.
Bodensee
63 km · 536 km²
Three countries, one chart. Swiss, German, and Austrian zones mapped together, BSB ferry routes included. Föhn recognition tuned to Konstanz conditions — because what's legal on one shore isn't always legal on the other.
Vierwaldstättersee
38 km · 114 km²
Four arms, four personalities. The Föhn accelerates differently through each one — from the exposed Urner See to the sheltered Küssnachter Arm. SGV paddle steamer routes mapped, with Föhn intensity calibrated arm by arm.
Thunersee
18 km · 48 km²
Alpine intensity in a compact lake. Föhn bursts off the Niesen and Stockhorn arrive fast, and active sport zones shift by season. BLS ferry lines and every zone — including the marked channel into Thun harbour.
Brienzersee
14 km · 30 km²
The quiet one — and the most turquoise. Glacier-fed, cold, and more exposed to valley Föhn than it looks. Fewer boats, all zones covered, BLS connection to Brienz mapped.
Lago Maggiore
66 km · 212 km²
Where Switzerland turns Italian. Tramontane from the north, Inverna from the valley — conditions at Locarno and Arona can differ completely. Full lake coverage, Swiss and Italian zones on one chart, Borromean Islands included.
Lago di Lugano
27 km · 49 km²
A navigator's lake. Fjord-like arms, a border through the water, and the Favonio hitting Lugano bay without much warning. Swiss and Italian zones on one chart — including Campione d'Italia.
Simple pricing
Buy it once.
Use it every summer.
One-time · No subscription · Ever
LacNav Pro
All 8 lakes · All features · Forever
Season Launch 2026 — 50% Off
CHF 50CHF 25
One payment · Own it forever
All 8 lakes — Zürichsee, Léman, Bodensee + more
Live GPS with Uferzone speed limit detection
Full weather — wind, UV, water temp, wave height, lightning
Named wind alerts — Bise, Föhn, Séchard, Tramontane
Rain radar · Ferry routes · POI overlays
Offline maps — works without mobile signal
Sport spots — find the best wakesurf & sail conditions on selected lakes
DE · FR · IT · EN — four languages supported

LacNav is made in Switzerland, for people who love Swiss lakes.
We're boaters too.