Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 7 pm 28 Sep 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
16.0°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 (29 Sep):

  • Morning surf: Morning surf (29 Sep, local time) - 3ft (0.9m), 8s period with E swell.
  • Afternoon surf: Afternoon surf (29 Sep, local time) - 2.5ft (0.8m), 8s period with E swell.
  • Evening surf: Evening surf (29 Sep, local time) - 2.5ft (0.7m), 8s period with E swell.

The current surf forecast for Nantasket Beach at 1AM is: 1.1m 8s primary swell from a East direction and 0.1m 15s secondary swell from a East direction, 1.1m 6s secondary swell from a North-northeast direction (forecast issued at 07:00pm September 28). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (29 Sep)3ft (0.9m)8s
Afternoon (29 Sep)2.5ft (0.8m)8s
Evening (29 Sep)2.5ft (0.7m)8s

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


Short Range Forecast

Light rain (total 4mm), mostly falling on Mon night. Warm (max 25°C on Thu afternoon, min 11°C on Mon night). Wind will be generally light.

Mon
28
Tuesday
29
Wednesday
30
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
1
2
1
1
1
0
0
1
1
1
1
1
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
ENE
8
1.7
ENE
8
1.6
ENE
8
1.1
E
8
1
E
8
0.9
E
8
0.9
E
8
0.8
E
8
0.8
E
8
0.7
E
8
0.7
E
8
0.7
E
9
0.7
E
9
0.7
E
9
0.7
E
8
0.7
E
8
0.6
E
8
0.6
E
8
0.6
E
8
Wave Graph
Metric surfscale
Energy kJ
423
363
307
161
130
108
111
90
90
71
71
73
73
73
71
71
51
51
49
Wind (km/h)
25
NNE
25
NNE
25
N
20
NNW
15
NW
10
WNW
15
NW
5
N
10
ENE
5
E
0
ESE
0
S
5
WSW
5
W
5
S
5
E
10
SE
10
SSW
10
SW
Wind State
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
on
on
glassy
glassy
glassy
glassy
glassy
on
cross-on
cross-off
cross-off
High Tide
1:19AM2.98m
1:33PM3.25m
2:06AM2.91m
2:18PM3.25m
Low Tide
7:07PM-0.20m
7:20AM-0.00m
7:53PM-0.22m
8:05AM0.05m
8:42PM-0.18m
light rain
light rain
light rain
cloud
cloud
cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
clear
cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
—
—
—
6:37
—
—
—
—
—
—
—
6:37
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
—
—
—
—
—
—
—
6:29
—
—
—
—
—
—
—
6:27
—
—
 mm
3
3
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
14
14
13
11
12
12
15
18
16
15
15
15
15
15
17
19
18
18
18
Feels °C
11
11
9
7
10
10
13
18
15
15
16
16
15
15
17
19
17
18
18
  • 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.


Nearest locationNearest