Marine forecast
Cape Thompson to Cape Beaufort (15-85 nm), AK
- marine forecast
- 72-hour
- 72-hr peak
- 23 kt
- Peak seas
- 7 ft
Forecast issued Tue 3:45 AM | PKZ857
- 72-hr peak
- 23 kt
- Peak seas
- 7 ft
In brief
The NWS forecast for Cape Thompson to Cape Beaufort (15-85 nm), AK issued at 3:45 am AKDT on Oct 13, 2026 reads, for today: “NE winds 25 kt. Seas 7 ft.” A Small Craft Advisory is in effect until Wed 5:00 AM.
Source: National Weather Service Fairbanks AK forecast; NDBC observations
Wind forecast · ktPeak 23 kt
Seas forecast · ftPeak 7 ft
Marine advisory
Small Craft Advisory in effect for Cape Thompson to Cape Beaufort (15-85 nm) until Wed 5:00 AM.
Full text of this small craft advisory
Arctic Alaska Coastal Waters out 100 NM Wind forecasts reflect the predominant speed and direction expected. Sea forecasts represent the average of the highest one- third of the combined wind-wave and swell height. .TODAY...NE winds 25 kt. Seas 7 ft. .TONIGHT...NE winds 25 kt. Seas 6 ft. .WED...NE winds 20 kt. Seas 5 ft. .WED NIGHT...N winds 20 kt. Seas 4 ft. .THU...NE winds 20 kt. Seas 4 ft. Light freezing spray. .THU NIGHT...NE winds 20 kt. Seas 5 ft. Light freezing spray. .FRI...N winds 20 kt. Seas 7 ft. .SAT...W winds 15 kt. Seas 4 ft.
Small Craft Advisory in effect for Cape Thompson to Cape Beaufort (15-85 nm) until Tue 5:00 PM.
Full text of this small craft advisory
Arctic Alaska Coastal Waters out 100 NM Wind forecasts reflect the predominant speed and direction expected. Sea forecasts represent the average of the highest one- third of the combined wind-wave and swell height. .TONIGHT...NE winds 25 kt. Seas 10 ft. .TUE...NE winds 25 kt. Seas 7 ft. .TUE NIGHT...NE winds 20 kt. Seas 6 ft. .WED...N winds 20 kt. Seas 6 ft. .WED NIGHT...N winds 15 kt. Seas 4 ft. .THU...N winds 20 kt. Seas 4 ft. .THU NIGHT...NE winds 20 kt. Seas 4 ft. .FRI...N winds 20 kt. Seas 6 ft. .SAT...W winds 15 kt. Seas 4 ft.
NWS marine forecast
| Period | Forecast |
|---|---|
| Today | NE winds 25 kt. Seas 7 ft. |
| Tonight | NE winds 25 kt. Seas 6 ft. |
| Wed | NE winds 20 kt. Seas 5 ft. |
| Wed Night | N winds 20 kt. Seas 4 ft. |
| Thu | NE winds 20 kt. Seas 4 ft. Light freezing spray. |
| Thu Night | NE winds 20 kt. Seas 5 ft. Light freezing spray. |
| Fri | N winds 20 kt. Seas 7 ft. |
| Sat | W winds 15 kt. Seas 4 ft. |
Issued Tue 3:45 AM by Fairbanks AK (product CWFNSB).
Frequently asked questions
What is the marine forecast for Cape Thompson to Cape Beaufort (15-85 nm) today?
Today: NE winds 25 kt. Seas 7 ft.
Is there a small craft advisory for Cape Thompson to Cape Beaufort (15-85 nm)?
Yes — small craft advisory, small craft advisory in effect until Wed 5:00 AM.
What do the wind speeds in knots mean?
One knot is 1.15 mph. The National Weather Service issues a small craft advisory for sustained winds of roughly 22–33 knots or hazardous seas, a gale warning at 34–47 knots, and a storm warning at 48 knots and above. Exact advisory thresholds vary by forecast office and by water body — a bay reaches dangerous chop at a lower wind speed than open ocean.
Where does this forecast come from?
The forecast text is the National Weather Service's own marine bulletin for zone PKZ857, issued by Fairbanks AK, reproduced in full. The wind and seas charts are drawn from the NWS gridded forecast for a point inside the zone. Observations come from the nearest reporting NDBC buoy. We are not affiliated with NOAA or the National Weather Service.
Forecast: NOAA/NWS product CWFNSB, issued Tue 3:45 AM. Observations: NOAA National Data Buoy Center. Retrieved Oct 13, 11:42 AM. Conditions offshore change faster than any page can be rebuilt, so check the current NWS bulletin and your own instruments before going out.