Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 7 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
20.8° C
0.2° 

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


How big are the waves at Nantasket Beach today (16 Aug):

  • Morning surf: Morning surf (16 Aug, local time) - 0.5ft (0.1m), 9s period with E swell.
  • Afternoon surf: Afternoon surf (16 Aug, local time) - 0.5ft (0.1m), 9s period with E swell.
  • Evening surf: Evening surf (16 Aug, local time) - 1.5ft (0.4m), 4s period with SSE swell.

The current surf forecast for Nantasket Beach at 1AM is: 0.1m 9s primary swell from a East direction (forecast issued at 07:00pm August 15). The wind direction is predicted to be glassy.

Time (EDT) & DateWave HeightWave Period
Morning (16 Aug)0.5ft (0.1m)9s
Afternoon (16 Aug)0.5ft (0.1m)9s
Evening (16 Aug)1.5ft (0.4m)4s

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


Short Range Forecast

Light rain (total 6mm), mostly falling on Mon afternoon. Warm (max 26°C on Sun afternoon, min 18°C on Sun morning). Wind will be generally light.

Sat
15
Sunday
16
Monday
17
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
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.1
E
9
0.1
E
12
0.1
E
12
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
11
0.4
SSE
3
0.3
SSE
4
0.3
SSE
4
0.3
SSE
4
0.3
SE
4
0.1
E
9
0.1
E
9
0.4
SE
4
0.6
SE
4
0.4
SE
4
Wave Graph
Metric surfscale
Energy kJ
2
3
3
2
2
2
2
2
2
4
3
3
3
2
2
2
3
16
5
Wind (km/h)
15
E
10
SE
10
SSW
5
WNW
5
NNW
5
N
5
ESE
15
ESE
20
S
20
SSW
20
SSW
20
S
20
S
20
S
20
S
15
S
10
SSE
0
NNE
10
NNW
Wind State
on
cross-on
cross-off
glassy
cross-off
glassy
on
on
cross
cross-off
cross-off
cross
cross-off
cross-off
cross
cross
cross-on
glassy
cross-off
High Tide
2:16AM3.09m
2:42PM3.06m
3:04AM2.92m
3:27PM2.98m
Low Tide
8:03PM-0.07m
8:28AM-0.10m
8:52PM0.01m
9:12AM0.06m
9:42PM0.11m
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
cloud
cloud
light rain
light rain
light rain
light rain
light rain
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:50
5:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:45
7:43
7:42
 mm
1
1
2
1
1
Temp °C
23
21
21
20
19
18
22
24
26
22
21
21
22
21
20
20
21
21
21
Feels °C
20
19
20
20
19
18
21
22
23
19
19
20
20
20
20
20
23
25
23
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nantasket Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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