Nantasket Beach Surf Forecast

/ Massachusetts (29 breaks) / Massachusetts (28 breaks) /

USA (1297 breaks) / Lat Long: (42.31° N 70.88° W)

Surf Forecasts:

Nantasket Beach surfForecast / Massachusetts / USA

48hr Weather and Surf, issued 7 am Monday 20 Oct 2025 EDT

Forecast update in hr min s Forecast update imminent

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

Today's Nantasket Beach sea temperature is 14.0° C
(Which is normal for this time of year)

How big are the waves at Nantasket Beach today?

The current surf forecast for Nantasket Beach at 12PM is: 1.6m 6s primary swell from a Southeast direction and 0.5m 8s secondary swell from a East direction (forecast issued at 07:00am October 20). The wind direction is predicted to be cross-shore.

Time (EDT) & Date	Wave Height	Wave Period
Morning (20 Oct)	4.5ft (1.4m)	6s
Afternoon (20 Oct)	3.5ft (1.1m)	7s
Evening (20 Oct)	2.5ft (0.8m)	8s

Table - waves today at Nantasket Beach. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Monday 20							Tuesday 21								Wednesday 22								Thu 23
	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	5 PM	8 PM	11 PM	2 AM
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 (?)	E	SE	SE	SE	SE	E	E	E	E	E	E	E	E	ENE	ENE	ENE	E	ENE	ENE	ENE	ENE	ENE	E	E
Period(s) (?)	9	6	6	7	7	7	7	7	7	10	10	10	10	10	10	10	10	10	9	9	9	9	9	9
Wave Graph (?)
kJ (?)	59	77	182	111	114	103	86	48	34	70	51	51	51	33	32	32	31	18	17	17	17	17	7	6
Wind (km/h)	SE	SE	SSE	S	S	SW	SW	SW	WSW	WSW	WSW	SW	SW	SSW	SSW	SSW	SSE	SE	SSW	SW	SW	SW	SW	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	cross	cross	cross- off	cross- off	cross- off	cross- off	cross- off	off	cross- off	cross- off	cross- off	cross- off	cross- off	cross	cross- on	cross- off	cross- off	cross- off	cross- off	cross- off	cross- off
High Tide / height (m)				11:15AM 2.92				11:40PM 2.77				11:49AM 2.95				12:18AM 2.72				12:24PM 2.95				12:56AM 2.66
Low Tide / height (m)		5:04AM 0.20				5:28PM 0.10				5:39AM 0.25				6:06PM 0.07				6:14AM 0.30				6:44PM 0.08

	Monday 20							Tuesday 21								Wednesday 22								Thu 23
Sunrise	-	7:01	-	-	-	-	-	-	-	7:01	-	-	-	-	-	-	-	7:03	-	-	-	-	-	-
Sunset	-	-	-	-	5:53	-	-	-	-	-	-	-	5:52	-	-	-	-	-	-	-	5:51	-	-	-

Rain (mm)	-	-	1	14	2	-	-	-	-	-	-	-	-	-	-	-	3	2	2	1	-	-	-	-
Temp. °C	16	17	18	13	14	13	13	13	12	10	13	17	17	13	13	14	13	14	16	19	17	14	12	10
Feels °C (?)	13	12	13	11	11	9	8	8	6	4	7	12	13	9	10	13	12	12	12	15	13	10	8	4

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 Massachusetts

Wind Update Previously calm conditions have become cross-shore at Nantasket Beach (fresh winds from the SSE at Hull 1 km from Nantasket Beach). 2.1m 6s windswell from the SE to make surfable waves.
55 minutes ago Nantasket Beach

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Actual: 55 min ago

35 km/h

SSE

Cross-Shore

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