Marine Weather Net

Block Island Sound Marine Forecast


TODAY

SW
WINDS
10 - 15
KNOTS

TONIGHT

W
WINDS
15 - 20
KNOTS

SUN

NW
WINDS
10 - 15
KNOTS

SUN NIGHT

NW
WINDS
20 - 25
KNOTS

The Marine Weather Forecast In Detail:
ANZ237 Forecast Issued: 403 AM EST Sat Dec 13 2025

SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EST THIS MORNING THROUGH LATE TONIGHT ...GALE WATCH IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY AFTERNOON...
Today...Sw Winds 10 To 15 Kt, Increasing To 15 To 20 Kt This Afternoon. Gusts Up To 25 Kt. Seas 2 To 4 Ft. Wave Detail: Sw 4 Ft At 5 Seconds And Se 1 Foot At 9 Seconds.
Tonight...W Winds 15 To 20 Kt With Gusts Up To 25 Kt, Becoming Nw 5 To 10 Kt After Midnight. Seas 2 To 4 Ft. Wave Detail: W 4 Ft At 6 Seconds And Se 1 Foot At 9 Seconds. Rain Likely. Snow After Midnight With Vsby 1 Nm Or Less.
Sun...Nw Winds 10 To 15 Kt, Increasing To 15 To 20 Kt In The Afternoon. Gusts Up To 25 Kt. Seas 2 To 3 Ft. Wave Detail: Nw 3 Ft At 6 Seconds. Snow, Mainly In The Morning. Vsby 1 Nm Or Less.
Sun Night...Nw Winds 20 To 25 Kt With Gusts Up To 35 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 4 Ft At 4 Seconds And S 2 Ft At 9 Seconds.
Mon And Mon Night...W Winds 20 To 25 Kt With Gusts Up To 35 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 4 Ft At 4 Seconds And S 2 Ft At 9 Seconds.
Tue And Tue Night...W Winds 10 To 15 Kt, Becoming Sw 15 To 20 Kt. Gusts Up To 25 Kt. Seas 2 To 4 Ft. Wave Detail: W 3 Ft At 5 Seconds And Se 1 Foot At 11 Seconds.
Wed And Wed Night...W Winds 15 To 20 Kt With Gusts Up To 30 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.
SHARE THIS PAGE:           
ANZ200 Synopsis Issued: 1005 AM EDT Tue Oct 15 2024

Synopsis For Massachusetts And Rhode Island Coastal Waters...
A Couple Of Weaker Fronts Push Across The Waters Through Thursday, Although No Significant Weather Is Expected. Gusty West To Northwest Winds Do Continue Through Wednesday Night. High Pressure Builds In From The West Late This Week And Will Stick Around Through The Upcoming Weekend.
...