SeaSick - Will I Puke?

Comfort calculator and weather logbook for sailors. SeaSick uses real physics and wave forecasts to predict comfort — from Champagne Sailing to Vomit Comet.

Will it be Champagne Sailing or are you boarding the Vomit Comet? SeaSick tells you — before you leave the dock.

SeaSick is the only app that combines real physics and scientific seasickness research with real-time weather data. Version 3.0 goes beyond prediction: measure actual boat motion, keep a complete weather logbook, and read proven prevention tips — all in one app.

COMFORT PREDICTION

Enter wave height, period, and boat details — or tap the map and let SeaSick fetch live data. You'll get a Comfort Score from 0 to 10, based on research by O'Hanlon & McCauley and ISO standards for human comfort.

• Manual input or real-time data via the forecast map • Monohull, catamaran, or motorboat • Boat speed, heading, and wave direction factored in • Adjust time: -1 hour, +1 day, or 'now' • Works for any sea, worldwide

The verdict? Honest and with humor — from "Champagne Sailing" to "Vomit Comet".

MOTION MEASUREMENT — new in 3.0

Lay your phone flat on the deck or in the cockpit. SeaSick measures actual boat motion for 30 seconds via the accelerometer and gives you:

• Sea state: from glass-calm to storm • Real-time G-forces with color scale • "How do you feel?" — results based on your condition and measured motion

WEATHER LOGBOOK — new in 3.0

Keep a logbook of your trip(s):

• GPS location (with place name and country) • Wave height, wave period, wind speed & direction • Sea temperature, air temperature, cloud cover, WMO weather codes • Enter manually or fetch automatically (and adjust) • Export as XLSX spreadsheet via AirDrop, email, or cloud

PREVENTION & RELIEF — new in 3.0

Two sections: prevent seasickness and what to do if you're already feeling sick.

• Explained: why do you get seasick? • Behavioral tips, dietary advice, and risk factors • Natural remedies: ginger, peppermint, acupressure bands • Tools and medication overview with dosages • Adjustable font size for reading at sea

13 LANGUAGES Fully translated: EN, NL, DE, FR, ES, IT, PT, PL, SV, NO, DA, EL, AR

FAIR PRICING Pay once, lifetime updates. No subscriptions, no ads, no in-app purchases.

• Dark mode • Metric and imperial • No account needed

Download SeaSick and know what you're in for.