Go or No? Marine Boat Weather
Wind, waves, tides & fishing
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Go or No turns the marine forecast into a decision.
Instead of making you stitch together wind, waves, and tide tables, it gives you one clear answer: is it a good day to head out — on YOUR boat, today, from your spot?
ONE CLEAR ANSWER
• A 1–10 boat-safety score with a plain GO / CAUTION / NO-GO verdict
• The score adapts to YOUR vessel — powerboat, sailboat, kayak, or other
• Set your length, engines, and horsepower and the score tightens or eases to match
• A kayak needs far calmer water than a big powerboat, and the verdict knows the difference
• A "now vs. later" read, e.g. "Light chop now — choppy by mid-afternoon"
• No black box — tap any verdict to see the why: the reasons, the numbers, and the charts behind it
MARINE CONDITIONS
• Wind speed, gusts, and direction
• Wave and swell height and period
• Water (sea-surface) temperature
• Fog and visibility
• Cloud cover
WEATHER
• Current conditions, hourly, and a 7-day forecast
• Barometric pressure with a rising or falling trend
• UV index, humidity, and sunrise / sunset times
TIDES
• High and low tide times and heights from NOAA (US coastal)
• A tide curve for the days ahead
ANY HARBOR, ANY SPOT
• Search any harbor, town, or beach by name and save it
• Or drop in exact coordinates, or just use your current GPS location
• Keep the places you fish and boat one tap apart and switch between them
BUILT FOR THE HELM
• Dark, glare-friendly design that won't blind you at dawn or burn your eyes at night
• Big type and glanceable cards, made for a one-handed check underway
• Your units, boat, and saved spots stick — set them once
Weather works anywhere in the world. NOAA tides cover US coastal waters.
Free. No account. No ads. No tracking. No sign-up wall.
This app is an advisory planning aid — always check the official NWS marine forecast and use your own judgment on the water.
Data from Open-Meteo and NOAA.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Under-the-hood improvements to help us learn which features matter most and keep making Go or No better, plus minor performance and reliability fixes.
The developer, Benjamin Smith-d'Agincourt, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Benjamin Smith-d'Agincourt
- Size
- 7.4 MB
- Category
- Weather
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Benjamin Smith-d'Agincourt