Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 1 am 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
20.5°C
1.1° 

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 (31 Aug):

  • Morning surf: Morning surf (31 Aug, local time) - 0.5ft (0.1m), 8s period with SE swell.
  • Afternoon surf: Afternoon surf (31 Aug, local time) - 0.5ft (0.1m), 8s period with SE swell.
  • Evening surf: Evening surf (31 Aug, local time) - 1ft (0.3m), 3s period with SE swell.

The current surf forecast for Nantasket Beach at 6AM is: 0.1m 8s primary swell from a Southeast direction and 0.1m 6s secondary swell from a East direction (forecast issued at 01:00am August 31). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (31 Aug)0.5ft (0.1m)8s
Afternoon (31 Aug)0.5ft (0.1m)8s
Evening (31 Aug)1ft (0.3m)3s

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


Short Range Forecast

Heavy rain (total 28mm), heaviest during Tue morning. Warm (max 22°C on Mon afternoon, min 15°C on Tue afternoon). Wind will be generally light.

Monday
31
Tuesday
1
Wednesday
2
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
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)
0.1
SE
8
0.1
SE
8
0.1
SE
8
0.1
SE
8
0.1
SE
8
0.2
NNE
4
0.3
NE
4
0.3
SE
3
0.3
SSE
3
0.1
SE
8
0.1
E
8
0.4
SE
3
0.5
SE
4
0.6
ESE
4
0.6
ESE
5
0.6
SE
5
0.4
ESE
4
0.2
E
12
0.2
E
11
0.2
ESE
11
0.6
ESE
5
0.5
E
5
0.7
ESE
5
0.5
ESE
5
Wave Graph
Metric surfscale
Energy kJ
3
3
3
3
3
3
3
3
3
3
1
2
6
12
14
17
8
11
9
11
17
13
26
16
Wind (km/h)
10
WNW
10
NW
10
N
10
ENE
15
ESE
20
SE
20
S
15
SSW
10
SSW
10
S
5
SE
25
ESE
25
ESE
20
ESE
15
ESE
15
ESE
15
ESE
15
E
15
ESE
15
ESE
15
ESE
15
ESE
15
SE
10
SSE
Wind State
off
cross-off
cross-off
on
on
cross-on
cross
cross-off
cross-off
cross
cross-on
on
cross-on
cross-on
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
High Tide
1:43AM2.97m
2:03PM3.04m
2:26AM2.91m
2:44PM3.09m
3:13AM2.81m
3:30PM3.09m
Low Tide
7:50AM0.00m
8:15PM-0.03m
8:31AM0.04m
9:02PM-0.04m
9:15AM0.11m
9:53PM-0.00m
clear
clear
clear
clear
clear
part cloud
clear
part cloud
cloud
cloud
light rain
heavy rain
mod rain
light rain
light rain
cloud
part cloud
part cloud
clear
cloud
part cloud
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:19
7:17
7:15
 mm
1
13
6
3
2
Temp °C
20
19
18
21
22
21
21
19
19
20
19
18
16
15
16
17
17
18
18
19
20
20
18
18
Feels °C
19
19
18
20
20
18
19
18
19
21
20
16
12
13
15
16
16
17
17
17
18
18
17
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 

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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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