National Weather Service United States Department of Commerce

NWS issues various types of marine warnings, watches and alerts for mariners. It is vital to understand and follow these alerts.

  • Marine Warning: Take Action! A warning is issued when dangerous conditions are imminent or occurring. If you are in at sea, take immediate action to protect yourself and your boat.
  • Marine Watch: Be Prepared: A watch is issued when conditions are favorable for a specific hazardous weather event to occur. This is the time to start preparing, not when a warning is issued.

To stay on top of all weather alerts, check or your favorite weather site frequently.

+Coastal Waters Forecasts

+Offshore Weather Forecasts

Offshore Waters forecasts are subdivided by zone, each identified by text description and a Universal Generic Code (UGC). These forecasts are prepared by:

For a complete list of NWS marine forecast products, see the Marine Forecasts, which contains information on the dissemination of NWS marine weather forecasts including frequency and broadcast schedule information as well as links to products and related information.