Longnook Beach Surf Forecast

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

USA (1297 breaks) / Lat Long: (42.00° N 70.02° W)

Surf Forecasts:

Longnook Beach surfForecast / Massachusetts / USA

48hr Weather and Surf, issued 1 am Thursday 21 Aug 2025 EDT

Forecast update in hr min s Forecast update imminent

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

Today's Longnook Beach sea temperature is 21.2° C
(Which is 1.4°C warmer than normal for this time of year)

How big are the waves at Longnook Beach today?

The current surf forecast for Longnook Beach at 5AM is: 1.2m 16s primary swell from a Southeast direction and 0.9m 5s secondary swell from a East-southeast direction (forecast issued at 01:00am August 21). An open ocean swell of 0.2m 16s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (EDT) & Date	Wave Height	Wave Period
Morning (21 Aug)	4.5ft (1.3m)	15s
Afternoon (21 Aug)	5ft (1.5m)	17s
Evening (21 Aug)	6ft (1.9m)	18s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

		Thursday 21								Friday 22								Saturday 23
	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	5 PM	8 PM
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	!	4	4	4	4	4	3	2	2	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	SE	E	ENE	ENE	E	E	E	E	E	E	E	E	E
Period(s) (?)	15	15	16	15	15	17	18	18	17	17	16	16	9	10	11	12	12	12	11	11	11	11	11	11
Wave Graph (?)
Energy (?)	518	632	747	695	786	1262	1998	2690	2911	3496	3480	3124	2094	2181	1972	2246	1624	1505	1358	1095	976	778	617	546
Wind (km/h)	ESE	E	ENE	ENE	ENE	ENE	ENE	NE	NE	NNE	NNE	NNE	N	N	NE	S	SW	SW	SW	SSW	SW	SSW	SSW	SSW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	on	on	cross- on	on	on	on	on	cross- on	cross- on	cross- on	cross- on	on	cross- off	off	off	off	off	off	off	off	off
High Tide / height (m)	9:58PM 2.59				10:44AM 2.24				10:55PM 2.62					11:35AM 2.31				11:46PM 2.63				12:20PM 2.37
Low Tide / height (m)			4:27AM -0.02				4:34PM 0.20					5:18AM -0.05				5:26PM 0.13				6:05AM -0.07				6:14PM 0.09

		Thursday 21								Friday 22								Saturday 23
Sunrise	-	-	-	5:52	-	-	-	-	-	-	-	5:54	-	-	-	-	-	-	-	5:54	-	-	-	-
Sunset	-	-	-	-	-	-	7:31	-	-	-	-	-	-	-	7:30	-	-	-	-	-	-	-	7:29	-

Rain (mm)	7	6	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	15	15	16	17	17	17	18	18	18	18	18	18	18	18	19	19	19	20	20	20	23	24	23	21
Feels °C (?)	11	11	12	11	11	10	11	9	9	9	9	10	11	12	16	17	15	17	16	16	21	20	18	16

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 Longnook Beach (light winds from the ESE at Provincetown Airport 18 km from Longnook Beach). 0.8m 5s windswell from the ESE with a 0.7m 17s long period groundswell, also from the ESE. 2 swells combining to make bigger set waves.
1 hour 41 minutes ago Longnook Beach

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18 km away, 1 h 41 min ago

7 km/h

ESE

0.0

21.2

Air / Water (°C)

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