Marine forecast
Block Island Sound, RI
- current wind
- 7 kt S
- Gusts
- 10 kt
- Seas
- 3.0 ft
- Period
- 8 sec
- Air
- 62°F
Observed Tue 2:54 PM | ANZ237
- Gusts now
- 10 kt
- Seas now
- 3.0 ft · 8 sec
- Air
- 62°F
- Water
- 63°F
- 72-hr peak
- 20 kt
In brief
At 2:54 pm EDT on Oct 13, 2026, NDBC station NWPR1 (Newport, RI, 20 miles away) measured wind from the S at 7 kt, gusting to 10 kt; buoy 44085 measured seas of 3.0 ft. The NWS forecast for Block Island Sound, RI issued at 1:04 pm EDT on Oct 13, 2026 reads, for this afternoon: “SE winds around 10 kt. Seas 2 to 4 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 20 kt
Seas forecast · ftPeak 3 ft
Marine advisory
Small Craft Advisory in effect for Block Island 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 around 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 8 seconds and E 2 ft at 4 seconds. Patchy drizzle. |
| Tonight | SW 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 3 ft at 4 seconds and S 3 ft at 8 seconds, becoming SW 4 ft at 5 seconds and SE 2 ft at 9 seconds. |
| Wed | SW winds 15 to 20 kt, becoming W 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave Detail: SW 4 ft at 7 seconds and E 1 foot at 7 seconds. |
| Wed Night | NW winds 10 to 15 kt. Gusts up to 20 kt after midnight. Seas 2 to 4 ft. Wave Detail: S 3 ft at 7 seconds and W 2 ft at 4 seconds. |
| Thu | N winds 10 to 15 kt with gusts up to 20 kt, becoming NE 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 5 seconds and SE 2 ft at 8 seconds. |
| Thu Night | E winds 5 to 10 kt, becoming SE 10 to 15 kt after midnight. Seas around 2 ft. Wave Detail: E 2 ft at 3 seconds and S 1 foot at 6 seconds. A chance of showers after midnight. |
| Fri | S winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 5 ft. Showers. |
| Fri Night | W winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft. Showers likely. |
| Sat | NW winds 25 to 30 kt with gusts up to 40 kt. Seas 5 to 7 ft. |
| Sat Night | NW winds 20 to 25 kt with gusts up to 35 kt. Seas 3 to 5 ft. 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 2:54 PM | 7 kt S | 10 kt | — | 63°F |
| Tue 1:54 PM | 7 kt S | 9 kt | — | 63°F |
| Tue 12:54 PM | 6 kt ESE | 11 kt | — | 63°F |
| Tue 11:54 AM | 8 kt SE | 9 kt | — | 63°F |
| Tue 10:54 AM | 8 kt E | 10 kt | — | 63°F |
| Tue 9:54 AM | 5 kt E | 8 kt | — | 63°F |
| Tue 8:54 AM | 5 kt NE | 7 kt | — | 63°F |
| Tue 7:54 AM | 3 kt ENE | 6 kt | — | 63°F |
| Tue 6:54 AM | 5 kt NNE | 9 kt | — | 63°F |
| Tue 5:54 AM | 4 kt ENE | 6 kt | — | 63°F |
| Tue 4:54 AM | 5 kt NE | 7 kt | — | 63°F |
| Tue 3:54 AM | 5 kt NE | 7 kt | — | 63°F |
Observed Tue 2:54 PM at NDBC buoy NWPR1 (Newport, RI), 20.2 miles away. Seas from buoy 44085 (Buzzards Bay, MA (260)), 32.0 miles away, at Tue 3:00 PM.
Frequently asked questions
What is the marine forecast for Block Island Sound today?
This Afternoon: SE winds around 10 kt. Seas 2 to 4 ft. Wave Detail: S 3 ft at 8 seconds and E 2 ft at 4 seconds. Patchy drizzle.
Is there a small craft advisory for Block Island Sound?
Yes — small craft advisory in effect until Wed 12:00 PM.
How high are the waves at Block Island Sound right now?
Seas are running 3.0 ft at a 8-second period, measured at NDBC buoy NWPR1 Tue 2:54 PM, 20.2 miles from this zone. The forecast peaks at 3.0 ft Tue 3 PM.
What is the water temperature at Block Island Sound?
The nearest buoy read 63°F (17°C) at Tue 2:54 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 ANZ237, 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 NWPR1, read Tue 2:54 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.