Marine, Tropical and Tsunami Services Branch
National Program
Interested in an hourly forecast for a particular point in a marine zone? In the entry boxes above, enter the latitude and longitude of the point you you are interested in and click submit for a forecast for that point. You can choose a point for land or water.
Clicking on an office of interest below will link to the marine point forecasts webpage of that particular office. You can choose Hourly Weather Graph or Digital Tabular from the menu in the upper right then click on a point (or enter latitude and longitude) within a marine zone and get an hourly forecast. You can choose marine parameters such as wind speed/direction, significant wave height and wave period to display in a graphical or tabular format. You can also select a 7 day text forecast from the menu. Forecast air temperatures are available and forecast water temperatures are available at some locations.
Marine Point Forecasts are a forecast for a specific point. Also provided on the point forecast pages are the "Forecast at a Glance" feature, and links to the "Hourly Weather Graph" and other data of local interest
Not yet available and/or may only be available experimentally in the areas of Alaska, Micronesia, Samoa, offshore, high seas, Canada, etc.....(a zone forecast may be returned in some of these cases...a zone forecast may also be returned when point data is temporarily unavailable)
A National Weather Service "Marine Point Forecast" refers to a text forecast for a single point generated from a forecaster-generated gridded data set known as the National Digital Forecast Database (NDFD) also used to produce graphics. The NDFD is used as the basis for the majority of local public and marine forecasts and is in the process of being further expanded to the offshore and high seas areas.
In actuality, the "point" is a single small rectangle which represents the resolution of the computer forecast models which is typically 2.5 by 2.5 kilometers.
Please Note: Being a forecast for a single point, the point forecast is very specific and mariners should also be aware of weather conditions in the surrounding area. Forecast information for the surrounding area can be found within the zone forecast and the NDFD graphics. Be aware, the forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.
US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
Marine, Tropical and Tsunami Services Branch
1325 East-West Hwy, 13th floor
Communications Office
Silver Spring, MD 20910
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