Block Island Surf Forecast

/ Rhode Island (33 breaks) / Rhode Island (34 breaks) /

USA (1297 breaks) / Lat Long: (41.15° N 71.59° W)

Surf Forecasts:

Block Island surfForecast / Rhode Island / USA

48hr Weather and Surf, issued 7 pm Wednesday 17 Sep 2025 EDT

Forecast update in hr min s Forecast update imminent

Block Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Block Island sea temperature is 19.9° C
(Which is normal for this time of year)

How big are the waves at Block Island today?

The current surf forecast for Block Island at 9PM is: 1.5m 8s primary swell from a East-southeast direction and 0.4m 7s secondary swell from a South-southwest direction (forecast issued at 07:00pm September 17). The wind direction is predicted to be cross-shore.

Time (EDT) & Date	Wave Height	Wave Period
Morning (17 Sep)	-	-
Afternoon (17 Sep)	5ft (1.5m)	7s
Evening (17 Sep)	5ft (1.5m)	8s

Table - waves today at Block Island. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Wednesday 17			Thursday 18								Friday 19								Saturday 20
	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	ESE	ESE	ESE	ESE	SE	SE	SE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	SW	ESE	SE	SE	SE	ENE	ENE
Period(s) (?)	8	8	7	7	7	7	7	7	8	8	8	8	7	7	7	7	7	6	7	9	9	9	5	5
Wave Graph (?)
kJ (?)	256	240	202	173	151	116	119	96	98	74	72	72	48	48	29	27	19	18	18	13	12	13	70	46
Wind (km/h)	ENE	ENE	ENE	NE	NE	NNE	N	N	SW	SW	WSW	W	WNW	NW	NW	SW	SW	NW	NE	NE	NE	NE	ENE	E
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross	cross	cross	cross- off	cross- off	cross- off	cross- off	glass	cross	cross	cross	cross- off	cross- off	off	off	cross	cross	cross- off	cross- off	cross- off	cross- off	cross- off	cross	cross
High Tide / height (m)		5:33PM 0.92				6:00AM 0.85				6:25PM 0.94				6:50AM 0.91				7:10PM 0.94				7:34AM 0.95
Low Tide / height (m)				12:14AM 0.07				12:15PM 0.10				12:58AM 0.04				1:03PM 0.07				1:36AM 0.03				1:46PM 0.05

	Wednesday 17			Thursday 18								Friday 19								Saturday 20
Sunrise	-	-	-	-	-	6:28	-	-	-	-	-	-	-	6:30	-	-	-	-	-	-	-	6:31	-	-
Sunset	6:52	-	-	-	-	-	-	-	6:51	-	-	-	-	-	-	-	6:49	-	-	-	-	-	-	-

Rain (mm)	-	-	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	19	18	19	19	18	18	18	19	20	21	20	20	20	19	22	24	24	24	20	18	16	16	16	17
Feels °C (?)	16	15	18	19	17	17	18	21	21	21	19	18	18	17	22	23	21	22	18	14	9	9	9	12

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Rhode Island

Wind Update Still cross-shore at Block Island (moderate winds from the ENE.(Wind varies from 005 to 011 degs) at Block Island Airport 3 km from Block Island). 1.2m 8s swell from the ESE with a 0.3m 7s swell from the S. 2 swells combining to make bigger set waves.
1 hour 58 minutes ago Block Island

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1 h 58 min ago

20 km/h

ENE

Cross-Shore

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