This is a pre-passage source and decision desk, not a current forecast or clearance to depart. The map is centred approximately on the area, not on your route or a forecast-zone boundary.
Find each named coastal, offshore, bay or lake zone along the route. For inlets, bars and tidal narrows add current local notices and observations; an offshore wave forecast does not describe the entrance.
1. Primary sources
Open current bulletins and warnings for every sea area on the route. These links are starting points, not a promise that each covers the whole location; if unsure, identify the issuer through WMO–IMO.
2. Route and local effects
Offshore zones, coastal fronts and tropical warnings answer different questions.
The Gulf of Mexico has distinct coastal and offshore zones; a front or tropical system can affect them at different times.
Track the relevant NOAA/NHC zone and Mexican SEMAR material where the route reaches Mexico. Compare warning validity with realistic arrival time, not just the departure window.
How to use this source set
Start with the warning, then the marine text for the exact named area. If the route crosses a zone boundary, obtain both bulletins. Note issue and valid times, wind units and the meaning of wave height. Where a link opens an agency portal, navigate to its current marine product; a homepage is not itself a forecast.
Compare with an exposed station or buoy if available. Check its position and observation time: a sheltered station does not overturn a warning for an open channel. If a bulletin is missing or stale, identify the issuing service via WMO–IMO and defer the decision until current information is available.
Before-passage check
- Mark departure, exposed legs, arrival and feasible diversions; find the responsible named marine areas for each.
- Check warnings, issue and valid times; assess conditions when you expect to reach each leg, not only at departure.
- Compare wind and gusts, waves and swell, visibility, thunderstorms and local effects; do not infer a strait from a sheltered harbour.
- Compare recent observations where available, noting their time and exposure; a mismatch calls for another check.
- Set the next bulletin check, a reassessment trigger, an alternative and a backup communication channel.
Model map — optional
Windy is a third-party model display, not the issuer of official warnings. Choose a layer and check its valid hour and model run. Nothing loads until you click.
Without JavaScript, open the map separately.
If connectivity fails
Before departure, save the current official text bulletin and warning with issue time. Arrange another way to receive updates, such as an appropriate coastal broadcast, NAVTEX or satellite channel. A saved map cannot replace new warnings.
How to choose weather tools · All sailing areas
Scope: Source list assembled 25 September 2026; check its freshness and coverage before use. This public area guide is not a current personalised forecast, navigational notice service or safety verdict. Personalised forecasts with AI and experts are in closed testing; public booking is not open. The skipper makes the decision.
Select the coastal issuer as well as the offshore basin
A Texas–Florida or Mexico-bound plan needs local coastal products at its ends and the applicable offshore zones between them. Use NWS and SEMAR for their stated waters; the offshore synopsis does not describe every port entrance. Retain any current warning narrative across the complete departure-to-arrival period. Check bulletin names and coordinates as products change, rather than treating a familiar basin label as a fixed coverage definition.
- NWS marine zone directory — Coastal, offshore and high-seas product selection; not automatic route matching.
- NHC marine products — Broader Gulf, Caribbean and tropical Atlantic/Pacific context; confirm the current product at the issuer. Direct product verification is limited; obtain the current issue from the issuer.
- SEMAR maritime meteorology — Mexican maritime meteorology portal; legacy search results can show old editions.
A front is a time-and-direction problem
Compare the pre-change and post-change wind and sea exposure for the full crossing and the receiving coast. A low departure wind can be misleading if the arrival occurs after a forecast change. Keep the slower-progress ETA beside the original estimate. Treat tropical advisories, thunderstorm warnings and routine marine forecasts as distinct inputs; one quiet offshore model cell cannot represent all three kinds of evidence.
Do not let a legacy Mexican forecast become live evidence
Search can return historical SEMAR pages with authoritative branding and readable numbers. Start at the current maritime meteorology portal and verify the actual issue date, area and validity before using a product. For a Mexico-bound arrival, obtain current port information independently. If a required forecast or entrance report remains unavailable, mark that as an unresolved decision gap rather than filling it with old numbers.
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.
- United States
Choose a bay, coastal, offshore, Great Lakes or ocean product for the actual track.