From Maine toward Florida, the relevant US marine product changes with location and distance offshore. A coastal zone forecast, an offshore forecast and a high-seas bulletin have different coverage. Start by finding the zone for the actual leg and checking its current warnings.
Find your NWS zone
The NWS Eastern US coastal forecast map helps locate the responsible forecast office and coastal area. The Western Atlantic marine text directory lists many coastal and offshore zones, while the NWS marine product directory includes offshore and high-seas bulletins. NWS notes that directory pages are not complete and linked forecasts may not be the latest; check the issue time and the issuing office.
Plan the whole coastal leg
- Trace coastal, inlet and offshore portions separately; note where the forecast zone changes.
- Review watches, warnings and the current text forecast for each zone.
- Check wind shifts, gusts, seas, visibility and thunderstorms at expected passage times.
- For any Gulf Stream crossing or interaction, assess the forecast, current and wave relationship for that particular route; do not rely on a generic rule.
- Identify a diversion and how to receive updates if connectivity fails.
The NWS low-bandwidth marine page provides text products that can be easier to retrieve with limited connectivity. It does not make the internet a guaranteed safety channel. For tropical systems affecting southern legs, also follow the National Hurricane Center.
If your route continues into open Atlantic waters, use the North Atlantic guide; if it ends in the Caribbean, see the Caribbean guide.
Source check: 24 September 2026. Confirm current zone boundaries and original bulletins before departure.