Choose a bay, coastal, offshore, Great Lakes or ocean product for the actual track.
Choose a sailing scenario
NOAA distinguishes coastal, offshore and high-seas products; bay/river and Great Lakes contexts need their own local coverage. Select the water type and issuing office before evaluating a window; a forecast for the nearest city is not the weather along a multi-zone route.
Season planning versus departure weather
Seasonal reputation helps shortlist a trip, but does not establish a departure window. Before fixing the passage, obtain current sea warnings, an issue valid across the planned legs and route-relevant observations. If the plan spans forecast horizons, schedule new checks rather than extending confidence beyond the data.
What the linked geography means
The links below include national waters, cross-border areas and, where relevant, overseas territories or onward passages. They are discovery links, not territorial boundaries or proof that one national bulletin covers every linked area. Follow each local desk to its own issuer.
Official products by task
- NOAA/NWS marine zones — Official coastal, offshore and high-seas product definitions and zone-map entry points.
- NOAA Northwest Atlantic briefing package — Surface analyses, offshore/high-seas forecasts and ocean briefing charts; not the whole Atlantic.
- NHC marine products — Tropical Atlantic marine coverage; select the current product and its geographical limits.
- NOAA NDBC observations — Station map and timestamped buoy/coastal records; inspect sensor availability and exposure.
- NOAA Tides & Currents — Predictions and observations are separate products; choose station, timezone and datum.
Sector names help you locate the issuing product; they are not an automatic route-coverage match. Open the current issue and check boundaries, issue time and validity. This page does not display current warnings; an unavailable product does not mean no hazard.
Waters and sailing options
- US East Coast
Select coastal, offshore and high-seas products for the waters actually crossed.
- Florida Atlantic coast and Keys
Miami, Florida Keys and the Straits are different forecast tasks, even on one itinerary.
- Chesapeake Bay
Assess the tributary, open Bay and destination separately; one town’s calm weather is not the Bay forecast.
- New England
Harbour shelter and offshore swell can diverge across a coastal passage.
- Gulf of Mexico
Offshore zones, coastal fronts and tropical warnings answer different questions.
- Great Lakes
A lake-wide forecast does not describe every exposed shore or harbour entrance.
- US Pacific Coast
Match exposed legs, timing, approaches and realistic shelter options to the named zones and validity periods of the official forecast.
- California coast
Swell direction and the next exposed headland matter alongside the coastal warning.
- Pacific Northwest and San Juan Islands
Straits and island channels need a local zone beyond the offshore synopsis.
- Hawaii
Use the correct island coastal zone plus Pacific offshore warnings for longer legs.
- British and US Virgin Islands
Do not merge BVI harbour information with USVI forecast responsibility.
- Puerto Rico and Spanish Virgin Islands
NWS San Juan coastal zones and channel exposure matter more than one town forecast.
Departure ports & bases
- Annapolis
Annapolis: a departure-source desk, not a generic city forecast.
- Miami
Miami: a departure-source desk, not a generic city forecast.
Build your passage brief
Bring your route, leg timings, vessel and crew profile, checked sources and reassessment triggers into the brief. Personal AI analysis and expert review are available to invited closed-test participants; a port page does not extend the calculation service’s coverage.
A Sailing Weather editorial guide to local conditions, practical passage preparation and marine-weather sources. Source and structure review: 27 September 2026. For a specific passage, check current issues, validity and forecast coverage. The skipper retains the final decision and responsibility.
Choose by the sailing problem, not only by state
For a first US trip, shortlist a water type before a state: bay/river days, open Great Lakes legs, Pacific coastal passages, Florida current crossings or Hawaiian channels require different evidence. Then select a base with access to the intended water and a feasible return. Use the linked regional desks to compare exposure, observation availability and the forecast horizon needed; do not rank destinations solely by an annual sunshine or wind average.
- NWS Chicago and Great Lakes marine products — Nearshore, open-lake, short-term warnings and lake observations; use the responsible lake/office.
- NWS Honolulu marine products — Hawaiian coastal/channel, offshore, observations and swell information.
- NWS marine zone directory — Coastal, offshore and high-seas product selection; not automatic route matching.
Create a source file that can survive travel and weak connectivity
Save the issuing-office links, zone descriptions and an update method before travelling; the forecast can change during the journey to the boat. At handover, obtain the current marine issue and check the real vessel, berth and intended entrance. A charter company's standard itinerary may help with logistics but is not a forecast endorsement. Keep local restrictions and harbour information separate from NOAA weather and model comparison.
- NWS marine zone directory
- NOAA CO-OPS Tides and Currents — Separate measured water levels, tide predictions, current predictions and model forecasts.
Editorial review of this material: 27 September 2026. This date concerns the page content; check current forecast issue times and validity at the original sources.