Tools for the water
Free tools for reading a marine forecast, and for going easier on the ocean while you are out there. Nothing to install and no account needed.
Before you go out
They help you read the forecast; they don't make the call for you.
Marine Forecast by ZIP Code
The National Weather Service forecast for the coastal waters nearest you, with any small craft advisories, gale warnings and other marine alerts.
Check the forecastSea State Calculator
Paste a marine forecast or enter wind, wave height and period. See the Beaufort force, how steep the waves are and how they will feel in your boat.
Work out the seaFor the ocean
How the reefs are doing today, and three things you can change this week: sunscreen, plastic and fuel.
Coral Bleaching Watch
Today's NOAA bleaching alert level for 40 reef regions, with sea temperature, Degree Heating Weeks and the last 12 months charted.
Check a reefReef-Safe Sunscreen Checker
Paste a sunscreen's ingredient list to see which filters are banned in Hawaii, the US Virgin Islands, Palau, Guam, Aruba and Thailand's national parks, and whether it is mineral-only.
Check a sunscreenPlastic Footprint Calculator
Count the bottles, bags, cups and takeout boxes you use in a week. See a year's worth by weight and the two or three swaps that cut the most.
Count your plasticBoat Trip Carbon Calculator
Work out the CO2 from a day on the water, from the fuel you bought or your engine and hours, and how much slowing down and a clean hull save.
Work out a trip