Marine forecast
Nantucket Sound, MA
- current wind
- 12 kt SSE
- Gusts
- 16 kt
- Seas
- 2.0 ft
- Period
- 3 sec
- Air
- 62°F
Observed Tue 3:10 PM | ANZ232
- Gusts now
- 16 kt
- Seas now
- 2.0 ft · 3 sec
- Air
- 62°F
- Water
- 62°F
- 72-hr peak
- 24 kt
In brief
At 3:10 pm EDT on Oct 13, 2026, NDBC station 44020 (NANTUCKET SOUND, 4 miles away) measured wind from the SSE at 12 kt, gusting to 16 kt; buoy 44090 measured seas of 2.0 ft. The NWS forecast for Nantucket Sound, MA issued at 1:04 pm EDT on Oct 13, 2026 reads, for this afternoon: “SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft.” A Small Craft Advisory is in effect until Wed 12:00 PM.
Source: National Weather Service Boston/Norton MA forecast; NDBC observations
Wind forecast · ktPeak 24 kt
Seas forecast · ftPeak 3 ft
Marine advisory
Small Craft Advisory in effect for Nantucket Sound until Wed 12:00 PM.
Full text of this small craft advisory
* WHAT...Southwest winds 15 to 25 kt and seas 3 to 5 feet expected. * WHERE...Portions of Massachusetts coastal waters and Rhode Island coastal waters. * WHEN...From midnight tonight to noon EDT Wednesday. * IMPACTS...Conditions will be hazardous to small craft.
NWS marine forecast
| Period | Forecast |
|---|---|
| This Afternoon | SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at 5 seconds. Patchy drizzle. |
| Tonight | S winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 3 ft, building to 3 to 5 ft after midnight. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 7 seconds, becoming SW 3 ft at 4 seconds and E 2 ft at 7 seconds. A chance of showers after midnight. |
| Wed | SW winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 4 seconds and E 2 ft at 7 seconds. |
| Wed Night | W winds 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 7 seconds. |
| Thu | N winds 15 to 20 kt, diminishing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 5 seconds and SE 1 foot at 9 seconds. |
| Thu Night | NE winds 5 to 10 kt, becoming SE after midnight. Seas around 2 ft. Wave Detail: NE 2 ft at 4 seconds and W 1 foot at 6 seconds. |
| Fri | S winds 20 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft. Showers. |
| Fri Night | W winds 25 to 35 kt. Seas 4 to 6 ft. Showers with a chance of tstms. |
| Sat | NW winds 25 to 35 kt. Seas 5 to 7 ft. |
| Sat Night | NW winds 25 to 30 kt with gusts up to 35 kt. Seas 4 to 6 ft. Winds and seas higher in and near tstms. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height. |
Issued Tue 1:04 PM by Boston/Norton MA (product CWFBOX).
Recent buoy conditions
| Time | Wind | Gust | Seas | Water |
|---|---|---|---|---|
| Tue 3:10 PM | 12 kt SSE | 16 kt | — | 62°F |
| Tue 2:50 PM | 14 kt SSE | 16 kt | 2.6 ft | 62°F |
| Tue 1:50 PM | 16 kt SE | 19 kt | 2.6 ft | 62°F |
| Tue 12:50 PM | 16 kt ESE | 18 kt | 2.3 ft | 62°F |
| Tue 11:50 AM | 14 kt E | 18 kt | 2.0 ft | 62°F |
| Tue 10:50 AM | 14 kt E | 16 kt | 2.0 ft | 61°F |
| Tue 9:50 AM | 14 kt E | 16 kt | 2.0 ft | 62°F |
| Tue 8:50 AM | 14 kt ENE | 18 kt | 2.0 ft | 62°F |
| Tue 7:50 AM | 14 kt ENE | 16 kt | 2.3 ft | 62°F |
| Tue 6:50 AM | 16 kt ENE | 19 kt | 2.3 ft | 62°F |
| Tue 5:50 AM | 18 kt ENE | 21 kt | 2.3 ft | — |
| Tue 4:50 AM | 19 kt NE | 21 kt | 2.6 ft | 62°F |
Observed Tue 3:10 PM at NDBC buoy 44020 (NANTUCKET SOUND), 4.2 miles away. Seas from buoy 44090 (Cape Cod Bay, MA (221)), 20.4 miles away, at Tue 3:00 PM.
Frequently asked questions
What is the marine forecast for Nantucket Sound today?
This Afternoon: SE winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Wave Detail: N 2 ft at 4 seconds and E 2 ft at 5 seconds. Patchy drizzle.
Is there a small craft advisory for Nantucket Sound?
Yes — small craft advisory in effect until Wed 12:00 PM.
How high are the waves at Nantucket Sound right now?
Seas are running 2.0 ft at a 3-second period, measured at NDBC buoy 44020 Tue 3:10 PM, 4.2 miles from this zone. The forecast peaks at 3.0 ft Tue 9 PM.
What is the water temperature at Nantucket Sound?
The nearest buoy read 62°F (16°C) at Tue 3:10 PM. Sea surface temperature at a single buoy can differ by several degrees from the water at a beach or in a shallow bay nearby.
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 ANZ232, issued by Boston/Norton MA, 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 CWFBOX, issued Tue 1:04 PM. Observations: NOAA National Data Buoy Center station 44020, read Tue 3:10 PM. Retrieved Oct 13, 3:42 PM. Conditions offshore change faster than any page can be rebuilt, so check the current NWS bulletin and your own instruments before going out.