Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 7 pm 12 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
20.9° C
0.1° 

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 (12 Aug):

  • Afternoon surf: Afternoon surf (12 Aug, local time) - 0.5ft (0.1m), 14s period with E swell.
  • Evening surf: Evening surf (12 Aug, local time) - 0.5ft (0.1m), 14s period with E swell.

The current surf forecast for Nantasket Beach at 11PM is: 0.1m 14s primary swell from a East direction and 0.1m 8s secondary swell from a East direction, 0.1m 9s secondary swell from a East direction (forecast issued at 07:00pm August 12). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (12 Aug)--
Afternoon (12 Aug)0.5ft (0.1m)14s
Evening (12 Aug)0.5ft (0.1m)14s

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


Short Range Forecast

Light rain (total 4mm), mostly falling on Thu morning. Warm (max 28°C on Thu afternoon, min 17°C on Fri night). Wind will be generally light.

Wed
12
Thursday
13
Friday
14
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)
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
11
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
9
0.1
E
9
Wave Graph
Metric surfscale
Energy kJ
4
4
4
2
4
4
4
4
3
3
3
3
3
3
3
3
3
2
2
Wind (km/h)
5
SSE
10
S
10
SSW
20
SW
15
SW
15
SW
15
SW
5
WNW
5
ENE
10
NNW
10
WNW
15
NW
15
NW
20
NW
15
NNW
10
NNW
5
N
0
NE
10
NW
Wind State
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
glassy
cross-off
High Tide
11:43PM3.33m
12:20PM3.00m
00:36AM3.31m
1:10PM3.07m
Low Tide
5:25PM-0.02m
6:07AM-0.30m
6:20PM-0.08m
6:56AM-0.29m
7:12PM-0.10m
part cloud
clear
cloud
cloud
cloud
thunderstorm
thunderstorm
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:48
5:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:49
7:47
7:45
 mm
3
1
Temp °C
27
25
22
23
19
19
23
28
27
26
23
22
20
20
24
26
26
24
22
Feels °C
26
24
21
20
19
19
23
29
28
25
22
20
18
17
21
23
25
24
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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