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Marine Forecasts
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National Weather Service Marine Forecasts

Marine Forecast Offices and Centers Marine Forecast Offices & Centers provide links to their products as well as additional regionally focused information. Click on map for links.

Beware of hypothermia during these cooler months. Did you know your body can cool 25 times faster in water than in air? That water does not need to be very cold to endanger you?

What is a "Marine Zone Forecast"?
What is a "Marine Point Forecast"?

How can I get a marine forecast via zip, city, or lat/lon?

Did you know that the height of some individual waves may be twice the height of the forecast seas? And may present an even greater danger near shore or any shallow waters?



The National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards, broadcasts a time and frequency service from stations WWV in Fort Collins, CO and WWVH in Kauai, Hawaii., commonly known to mariners as the "Time Tick", used as an aid in celestial navigation. The NWS provides hourly voice broadcasts of current high seas storm warnings for the Atlantic, Pacific and Gulf of Mexico during the "time tick", however, the NWS is considering a proposal to discontinue this service.

Discrimination between the two stations may be accomplished as WWV uses a male announcer for announcement of time, while WWVH uses a female announcer.

The audio portions of the WWV and WWVH broadcasts can also be heard by telephone. To hear these broadcasts, dial (303) 499-7111 for WWV (Colorado), and (808) 335-4363 for WWVH (Hawaii). Callers are disconnected after 2 minutes. These are not toll-free numbers; callers outside the local calling area are charged for the call at regular long-distance rates. The telephone service is very popular. The WWV number receives over 1 million calls per year, and the WWVH number receives more than 50,000.

For some further information on WWV, WWVH and time signals worldwide, see NGA Publication 117 "Radio Navigational Aids"

All NWS marine forecasts rely heavily on the Voluntary Observing Ship (VOS) program for obtaining meteorological observations.

WWV (Fort Collins, CO) 2.5, 5, 10, 15, 20 MHZ (AM)

8 Minutes past the hour Atlantic highseas warnings
9 Minutes past the hour Atlantic highseas warnings
10 Minutes past the hour Pacific highseas warnings

WWVH (Hawaii) 2.5, 5, 10, 15 MHZ (AM)

48-51 Minutes past the hour Pacific highseas warnings

National Weather Service
Analyze, Forecast, and Support Office
Marine, Tropical, and Tsunami Services Branch (W/AFS26)
Last modified: Oct 13, 2017
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