National Weather Service United States Department of Commerce
Our website addresses are changing and you will need to update your bookmarks. This server will be decommissioned on May 30, 2019. See for details. This page's new url is You will be forwarded to the new page within 15 seconds.

Mariners, the National Weather Service needs your reports - become part of the U.S. Voluntary Observing Ship Project today! Contact our Port Meteorological Officer to take part.

Marine Product Dissemination Information

Marine Weather Message in Effect for the Coastal Waters

Marine section from the Area Forecast Discussion
issued at: Apr 22, 2019 3:47 AM HST

A ridge north of the state will maintain fresh to locally strong trade winds through Thursday. A front is expected to stall north of the state Friday into the weekend and cause the ridge of high pressure to weaken. This will result in a decrease of winds Friday through the weekend and may cause sea breezes to develop near coastal areas by Saturday afternoon. The current Small Craft Advisory (SCA) is in effect for the typical windy areas around Maui and the Big Island through Wednesday.

Surf along all shores is expected to remain below advisory levels for this week. A few small west-northwest and north-northwest swells will provide small surf along north and west facing shores throughout the week. A series of small south swells will provide small surf starting today and will likely continue through most of the week and into the weekend. Local PacIOOS/CDIP buoy at Barbers Point is starting to show an uptick in energy across the 16 to 18 second bands this morning. This swell should continue to fill in through the day today and will likely peak tonight and slowly drop over the next couple of days. Several reinforcing south swells are expected towards the latter half of the week. Surf along east facing shores will hold steady in the small to moderate range through Thursday due to the breezy to locally strong trades.

Text Products


Marine Graphics

The Marine Radiofax Charts for Station KVM-70 are now available via E-mail or FTP. Click here for more details on the charts available. For information on FTPMAIL click here.

Graphic Forecasts
for Hawaiian Islands and surrounding coastal waters
Pacific Streamline Analysis
tif Latest 00Z 06Z 12Z 18Z  
gif Latest 00Z 06Z 12Z 18Z Loop
North Pacific Surface Analysis
From the Unified Surface Analysis
gif Latest 00Z 06Z 12Z 18Z Loop
Pacific Surface Forecast
gif 12Z Charts 24 hr 48 hr 72 hr
gif 00Z Charts 24 hr 48 hr 72 hr
Pacific Wind Wave
Analysis and Forecasts
12Z Charts
tif Analysis 24 hr 48 hr 72 hr
gif Analysis 24 hr 48 hr 72 hr
00Z Charts
tif Analysis 24 hr 48 hr 72 hr
gif Analysis 24 hr 48 hr 72 hr
Pacific Sea Surface
Temperature Analysis

satellite-derived (updated twice weekly)
Symbols & Test Chart (gif)
Symbols & Test Chart (TIF)

Related Links


Radio Fax/FTPMail

Surf/Beach Safety

Other NOAA Information

About the Marine Program

Routine forecast are issued for the Hawaiian Coastal Waters, the Offshore Waters, and High Seas. Coastal Waters are within 40 nautical miles of the main Hawaiian islands. The Offshore area extends from this 40 nautical mile mark to 240 nautical miles of the main Hawaiian islands. The High Seas forecasts are issued for an area that covers approximately 15,000,000 square miles, extends as far north as 30N, and as far south as 25S, and between 120W south of the equator and 140W north of the equator to 160E.
Marine Area of Responsibility Map for High Seas
Map of Coastal Marine Zones
Map of Offshore Marine Zones

The marine forecasts issued are based on marine observations and model data. Marine observations include buoy and ship reports. Ship reports are invaluable to the NWS, and are reported through the U.S. Voluntary Observing Ship Project. If you are a mariner, please consider joining the nearly 1,000 volunteer ships from around the world that observe the weather at their location.