Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 7 am 22 Sep 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
17.9°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 (22 Sep):

  • Morning surf: Morning surf (22 Sep, local time) - 4.5ft (1.3m), 5s period with ENE swell.
  • Afternoon surf: Afternoon surf (22 Sep, local time) - 4.5ft (1.4m), 6s period with ENE swell.
  • Evening surf: Evening surf (22 Sep, local time) - 3.5ft (1.1m), 6s period with ENE swell.

The current surf forecast for Nantasket Beach at 1PM is: 1.4m 6s primary swell from a East-northeast direction and 0.1m 14s secondary swell from a East direction (forecast issued at 07:00am September 22). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (22 Sep)4.5ft (1.3m)5s
Afternoon (22 Sep)4.5ft (1.4m)6s
Evening (22 Sep)3.5ft (1.1m)6s

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


Short Range Forecast

Mostly dry. Very mild (max 15°C on Wed morning, min 12°C on Thu morning). Mainly fresh winds.

Tuesday
22
Wednesday
23
Thursday
24
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)
0.9
ENE
4
1.2
ENE
5
1.3
ENE
6
1.4
ENE
6
1
E
6
1.2
ENE
6
1.1
ENE
6
1.3
ENE
6
1.5
ENE
6
1.6
ENE
6
1.7
ENE
7
2
ENE
7
2
ENE
7
1.9
ENE
8
1.8
E
8
1.8
E
9
1.9
E
9
1.9
E
10
1.9
E
10
2
E
10
2.3
E
10
1.8
E
10
1.8
E
11
Wave Graph
Metric surfscale
Energy kJ
34
69
104
128
81
115
95
121
155
194
268
382
426
450
439
494
614
683
711
818
1124
709
743
Wind (km/h)
25
NE
25
NE
25
NE
25
NE
20
NE
20
ENE
20
ENE
25
NE
25
NE
25
ENE
30
NE
30
NE
30
NE
25
ENE
20
ENE
20
NE
25
NE
25
NE
30
NE
25
NE
25
NE
20
NE
20
NE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
8:51AM2.37m
9:00PM2.69m
9:38AM2.50m
9:48PM2.79m
10:18AM2.65m
10:30PM2.88m
Low Tide
2:36AM0.45m
2:44PM0.59m
3:24AM0.35m
3:33PM0.45m
4:05AM0.24m
4:17PM0.30m
cloud
cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:30
6:31
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:38
6:37
 mm
Temp °C
15
14
14
14
13
14
14
14
14
15
14
13
13
13
13
13
13
12
13
13
13
13
13
Feels °C
11
9
9
9
8
10
9
9
9
10
8
7
8
8
9
8
8
7
8
8
8
8
9
  • 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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