Marine forecast
Sand Island to Bayfield, WI
- current wind
- 7 kt WSW
- Gusts
- 9 kt
- Seas
- 2.6 ft
- Period
- 6 sec
- Air
- 48°F
Observed Tue 2:10 PM | LSZ147
- Gusts now
- 9 kt
- Seas now
- 2.6 ft · 6 sec
- Air
- 48°F
- 72-hr peak
- 22 kt
In brief
At 2:10 pm CDT on Oct 13, 2026, NDBC station DISW3 (Devils Island, WI, 11 miles away) measured wind from the WSW at 7 kt, gusting to 9 kt; buoy 45023 measured seas of 2.6 ft. The NWS forecast for Sand Island to Bayfield, WI issued at 2:22 pm CDT on Oct 13, 2026 reads, for tonight: “Northwest wind 5 to 10 knots. Chance of sprinkles early in the evening.”
Source: National Weather Service Duluth MN forecast; NDBC observations
Wind forecast · ktPeak 22 kt
NWS marine forecast
| Period | Forecast |
|---|---|
| Tonight | Northwest wind 5 to 10 knots. Chance of sprinkles early in the evening. Waves 1 to 2 feet. |
| Wednesday | Northwest wind 5 to 10 knots. Mostly sunny. Waves 1 foot or less. |
| Wednesday Night | North wind 5 knots becoming east in the late evening and early morning, then becoming southeast early in the morning. Partly cloudy in the evening then becoming mostly cloudy. Waves 1 foot or less. |
| Thursday | South wind 5 knots becoming southwest with gusts to around 20 knots in the afternoon. Chance of rain showers in the afternoon. Waves 1 foot or less. |
Issued Tue 2:22 PM by Duluth MN (product NSHDLH).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 2:10 PM | 7 kt WSW | 9 kt | — | — |
| Tue 1:50 PM | 5 kt WSW | 7 kt | — | — |
| Tue 12:50 PM | 5 kt WSW | 7 kt | — | — |
| Tue 11:50 AM | 3 kt NW | 5 kt | — | — |
| Tue 10:50 AM | 5 kt NNE | 7 kt | — | — |
| Tue 9:50 AM | 8 kt NNE | 9 kt | — | — |
| Tue 8:50 AM | 9 kt NNE | 11 kt | — | — |
| Tue 7:50 AM | 13 kt NNE | 15 kt | — | — |
| Tue 6:50 AM | 15 kt NNE | 17 kt | — | — |
| Tue 5:50 AM | 18 kt NNE | 21 kt | — | — |
| Tue 4:50 AM | 23 kt NNE | 26 kt | — | — |
| Tue 3:50 AM | 22 kt NNE | 27 kt | — | — |
Observed Tue 2:10 PM at NDBC buoy DISW3 (Devils Island, WI), 10.6 miles away. Seas from buoy 45023 (North Entry Buoy, North Keweenaw Peninsula, MI), 106.4 miles away, at Tue 1:40 PM.
Frequently asked questions
What is the marine forecast for Sand Island to Bayfield today?
Tonight: Northwest wind 5 to 10 knots. Chance of sprinkles early in the evening. Waves 1 to 2 feet.
Is there a small craft advisory for Sand Island to Bayfield?
No advisories, warnings or watches are in effect for NWS zone LSZ147 as of the last update on this page. Advisories can be issued at any time; check the current bulletin before leaving the dock.
How high are the waves at Sand Island to Bayfield right now?
Seas are running 2.6 ft at a 6-second period, measured at NDBC buoy DISW3 Tue 2:10 PM, 10.6 miles from this zone.
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 LSZ147, issued by Duluth MN, 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 NSHDLH, issued Tue 2:22 PM. Observations: NOAA National Data Buoy Center station DISW3, read Tue 2:10 PM. Retrieved Oct 13, 2:42 PM. Conditions offshore change faster than any page can be rebuilt, so check the current NWS bulletin and your own instruments before going out.