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 1 pm Tuesday 16 Sep 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 17.2° C
(Which is slightly cooler than normal)

How big are the waves at Nantasket Beach today?

The current surf forecast for Nantasket Beach at 4PM is: 0.5m 7s primary swell from a East direction and 0.1m 12s secondary swell from a East direction, 0.2m 2s secondary swell from a East-northeast direction (forecast issued at 01:00pm September 16). The wind direction is predicted to be onshore.

Time (EDT) & Date	Wave Height	Wave Period
Morning (16 Sep)	1.5ft (0.5m)	8s
Afternoon (16 Sep)	1.5ft (0.5m)	7s
Evening (16 Sep)	1.5ft (0.5m)	7s

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

	Tuesday 16					Wednesday 17								Thursday 18								Friday 19
	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	5 AM	8 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	E	E	E	E	E	E	ESE	ESE	E	E	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE	ESE
Period(s) (?)	8	8	7	7	7	7	7	7	7	7	7	7	7	7	7	8	8	8	8	8	8	8	7	7
Wave Graph (?)
kJ (?)	29	28	27	27	26	26	26	16	16	8	10	10	10	10	10	21	21	20	23	19	32	22	18	18
Wind (km/h)	ENE	E	E	ESE	ESE	ESE	NE	ENE	E	E	E	ESE	S	SW	NW	WSW	SSW	SE	SSE	SSW	SW	WSW	W	NW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	on	on	on	cross- on	glass	cross- on	cross- on	on	on	on	cross- on	cross	glass	glass	glass	glass	cross- on	cross- on	cross- off	cross- off	cross- off	off	cross- off
High Tide / height (m)				7:30PM 2.90					8:23AM 2.53				8:39PM 2.90				9:27AM 2.61				9:41PM 2.94
Low Tide / height (m)		1:08PM 0.44					2:05AM 0.16				2:16PM 0.42				3:10AM 0.13				3:21PM 0.34				4:05AM 0.09

	Tuesday 16					Wednesday 17								Thursday 18								Friday 19
Sunrise	-	-	-	-	-	-	-	6:24	-	-	-	-	-	-	-	6:26	-	-	-	-	-	-	-	6:26
Sunset	-	-	6:52	-	-	-	-	-	-	-	6:50	-	-	-	-	-	-	-	6:47	-	-	-	-	-

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

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 Continuing clean conditions at Nantasket Beach (calm at Hull 1 km from Nantasket Beach). 0.5m 8s swell from the E with a 0.2m 2s local chop from the ENE. 2 swells combining to make bigger set waves.
1 hour 41 minutes ago Nantasket Beach

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1 h 41 min ago

3 km/h

ESE

Clean

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