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.
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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".
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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
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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
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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
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13 LANGUAGES
Fully translated:
EN · NL · DE · FR · ES · IT · PT · PL · SV · NO · DA · EL · AR
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FAIR PRICING
Pay once, lifetime updates. No subscriptions, no ads, no in-app purchases.
• Dark mode
• Metric and imperial
• No account needed
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Download SeaSick and know what you're in for.