Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 1 am 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 (28 Sep):

  • Morning surf: Morning surf (28 Sep, local time) - 7ft (2.1m), 8s period with ENE swell.
  • Afternoon surf: Afternoon surf (28 Sep, local time) - 7ft (2.1m), 8s period with ENE swell.
  • Evening surf: Evening surf (28 Sep, local time) - 6ft (1.8m), 8s period with ENE swell.

The current surf forecast for Nantasket Beach at 5AM is: 2.1m 8s primary swell from a East-northeast direction (forecast issued at 01:00am September 28). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (28 Sep)7ft (2.1m)8s
Afternoon (28 Sep)7ft (2.1m)8s
Evening (28 Sep)6ft (1.8m)8s

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


Short Range Forecast

Moderate rain (total 17mm), heaviest on Mon morning. Warm (max 20°C on Wed afternoon, min 12°C on Mon night). Winds decreasing (fresh winds from the NE on Mon morning, calm by Wed morning).

Monday
28
Tuesday
29
Wednesday
30
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
11 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
1
1
1
1
1
1
0
0
1
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)
2.4
ENE
8
2.1
ENE
8
2
ENE
8
2.1
ENE
9
2.1
ENE
8
1.9
ENE
8
1.8
ENE
8
1.3
ENE
8
1.2
E
8
1.1
E
8
1
E
8
0.9
E
8
0.8
E
8
0.8
E
8
0.8
E
8
0.8
E
8
0.8
E
9
0.7
E
9
0.7
E
9
0.7
E
9
0.7
ENE
8
0.7
E
8
0.7
E
8
0.7
E
8
Wave Graph
Metric surfscale
Energy kJ
723
608
560
629
545
453
412
223
190
161
133
111
90
90
92
92
94
74
74
73
75
69
69
68
Wind (km/h)
30
NNE
30
NNE
30
NE
30
NE
20
NE
20
NNE
25
NNE
25
N
25
NNW
15
NW
15
NW
15
NW
10
N
5
NNE
10
NE
5
N
5
NNE
5
WNW
0
W
0
SW
5
SE
10
SE
10
S
10
SSW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-on
glassy
glassy
glassy
glassy
glassy
glassy
cross-on
cross
cross-off
High Tide
00:35AM3.01m
12:50PM3.19m
1:19AM2.98m
1:33PM3.25m
2:06AM2.91m
2:18PM3.25m
Low Tide
6:38AM-0.02m
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
light rain
light rain
light rain
light rain
light rain
light rain
cloud
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
—
6:35
—
—
—
—
—
—
—
6:37
—
—
—
—
—
—
—
6:37
—
—
—
—
—
—
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
—
—
—
—
—
6:30
—
—
—
—
—
—
—
6:29
—
—
—
—
—
—
—
6:27
—
—
 mm
1
1
1
4
3
3
1
4
1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Temp °C
13
14
14
15
15
15
14
13
12
12
12
14
17
17
16
15
15
15
15
17
20
19
19
18
Feels °C
8
9
9
11
12
13
11
9
8
9
10
12
16
17
16
15
15
15
16
18
20
18
19
17
  • 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