Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 7 pm 22 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
20.9°C
0.8° 

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 (23 Aug):

  • Morning surf: Morning surf (23 Aug, local time) - 2ft (0.6m), 5s period with ENE swell.
  • Afternoon surf: Afternoon surf (23 Aug, local time) - 2ft (0.6m), 5s period with E swell.
  • Evening surf: Evening surf (23 Aug, local time) - 1.5ft (0.5m), 5s period with E swell.

The current surf forecast for Nantasket Beach at 4AM is: 0.7m 5s primary swell from a East-northeast direction and 0.2m 8s secondary swell from a East direction (forecast issued at 07:00pm August 22). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (23 Aug)2ft (0.6m)5s
Afternoon (23 Aug)2ft (0.6m)5s
Evening (23 Aug)1.5ft (0.5m)5s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Sun morning. Warm (max 28°C on Mon afternoon, min 17°C on Tue morning). Wind will be generally light.

Sat
22
Sunday
23
Monday
24
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)
0.9
E
5
0.9
ENE
5
0.8
ENE
5
0.8
ENE
5
0.6
ENE
5
0.6
ENE
5
0.6
E
5
0.6
E
5
0.6
E
5
0.6
E
5
0.2
E
12
0.5
E
6
0.4
E
6
0.4
SE
7
0.5
E
6
0.2
E
11
0.3
E
6
0.4
E
6
0.4
ESE
6
Wave Graph
Metric surfscale
Energy kJ
47
49
37
31
20
21
20
20
19
16
11
19
12
12
20
10
7
12
13
Wind (km/h)
20
NE
15
NNE
10
NE
5
NE
5
ENE
10
E
10
ESE
10
ESE
5
S
10
S
10
SSW
10
SW
10
SW
15
SW
20
SW
20
SW
20
SSW
15
SSW
15
SSW
Wind State
cross-on
cross-on
cross-on
glassy
on
on
on
on
glassy
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
7:49PM2.62m
8:40AM2.27m
8:46PM2.66m
9:34AM2.33m
9:38PM2.73m
Low Tide
2:27AM0.45m
2:28PM0.67m
3:22AM0.40m
3:21PM0.60m
cloud
cloud
cloud
part cloud
cloud
cloud
light rain
cloud
thunderstorm
clear
thunderstorm
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:34
7:32
7:30
 mm
1
1
1
Temp °C
19
18
19
19
19
20
21
21
24
23
21
21
20
20
26
28
28
24
21
Feels °C
18
18
21
21
21
21
23
23
27
26
22
23
20
19
22
24
24
21
20
  • 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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