Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 7 am 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
18.9°C
0.5° 

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 (13 Sep):

  • Morning surf: Morning surf (13 Sep, local time) - 0.5ft (0.2m), 10s period with E swell.
  • Afternoon surf: Afternoon surf (13 Sep, local time) - 0.5ft (0.2m), 10s period with E swell.
  • Evening surf: Evening surf (13 Sep, local time) - 0.5ft (0.2m), 9s period with E swell.

The current surf forecast for Nantasket Beach at 11AM is: 0.2m 10s primary swell from a East direction and 0.3m 4s secondary swell from a Southeast direction (forecast issued at 07:00am September 13). The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (13 Sep)0.5ft (0.2m)10s
Afternoon (13 Sep)0.5ft (0.2m)10s
Evening (13 Sep)0.5ft (0.2m)9s

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


Short Range Forecast

Heavy rain (total 47mm), heaviest during Sun afternoon. Warm (max 21°C on Mon afternoon, min 14°C on Mon night). Wind will be generally light.

Sunday
13
Monday
14
Tuesday
15
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
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
E
10
0.2
E
10
0.2
E
10
0.2
E
10
0.2
E
10
0.2
E
9
0.2
ESE
9
0.2
ESE
9
0.2
E
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.3
ESE
8
0.3
ESE
8
0.3
ESE
8
0.9
NE
5
1.1
NE
6
1
NE
6
0.9
NE
6
0.8
NE
5
0.7
NE
5
0.7
ENE
6
0.5
ENE
6
Wave Graph
Metric surfscale
Energy kJ
8
8
8
8
7
7
8
8
7
8
8
7
14
14
14
45
72
58
50
34
27
32
18
Wind (km/h)
10
S
10
S
5
SSE
10
SSE
5
ENE
5
SSE
10
WSW
10
SW
25
NW
20
WNW
25
NW
25
NNW
15
NW
20
NNW
15
N
10
N
15
NNE
15
NE
15
ENE
10
E
10
ESE
15
SE
15
S
Wind State
cross
cross
cross
cross-on
on
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross
High Tide
1:26PM3.12m
1:52AM2.95m
2:08PM3.07m
2:36AM2.80m
2:49PM2.97m
Low Tide
7:14AM-0.06m
7:39PM-0.09m
7:55AM0.06m
8:24PM-0.01m
8:37AM0.21m
9:10PM0.10m
part cloud
cloud
mod rain
heavy rain
rain showers
clear
clear
cloud
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:20
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:57
6:54
6:53
 mm
8
33
5
1
Temp °C
18
19
19
19
19
19
19
19
20
17
19
21
21
19
16
15
14
14
14
15
15
14
14
Feels °C
18
19
21
21
21
22
21
20
18
14
15
15
17
14
13
12
11
11
11
13
13
11
12
  • 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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