Nantasket Beach surf break

Nantasket Beach surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 am Friday 22 May 2026 EDT
Forecast update in hr  min  s Forecast update imminent
Nantasket Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nantasket Beach sea temperature is
12.8° C
(Which is 2.4°C warmer than normal for this time of year)

How big are the waves at Nantasket Beach today?

The current surf forecast for Nantasket Beach at 4PM is: 0.5m 4s primary swell from a Northeast direction and 0.1m 9s secondary swell from a East direction (forecast issued at 07:00am May 22). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (22 May)2.5ft (0.7m)4s
Afternoon (22 May)2ft (0.6m)4s
Evening (22 May)1.5ft (0.4m)4s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 28mm), heaviest during Sun afternoon. Very mild (max 14°C on Sat afternoon, min 8°C on Sun morning). Winds increasing (calm on Fri night, fresh winds from the ESE by Sun afternoon).

Friday
22
Saturday
23
Sunday
24
Mon
25
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
2 AM
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 MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.8
NE
4
0.8
NE
4
0.7
NE
4
0.6
NE
4
0.5
NE
4
0.4
ENE
4
0.1
E
13
0.1
E
14
0.1
E
14
0.1
E
13
0.1
E
14
0.1
E
10
0.1
E
13
0.1
E
10
0.1
E
13
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
18
0.7
SE
4
1.2
ESE
5
1.3
ESE
6
1.8
SE
7
1.2
ESE
7
Wave Graph
Metric surfscale
Energy kJ
21
22
19
16
10
7
4
4
4
4
4
2
3
2
3
3
3
3
6
17
78
136
279
121
Wind (km/h)
20
NE
20
NE
15
ENE
15
E
10
SE
10
SSE
10
SSW
5
WSW
0
NNW
5
NE
10
E
10
ESE
10
ESE
10
ESE
10
SE
10
SSE
10
SE
15
ESE
25
ESE
30
ESE
30
ESE
25
E
20
ENE
15
NNE
cross-on
cross-on
cross-on
on
cross-on
cross
cross-off
off
glassy
cross-on
on
on
on
on
cross-on
cross
cross-on
on
on
on
on
on
on
cross
High Tide
4:12AM3.08m
5:02PM2.77m
5:18AM2.93m
6:05PM2.76m
6:23AM2.81m
7:05PM2.79m
Low Tide
10:41AM-0.05m
11:01PM0.30m
11:43AM0.07m
00:08AM0.34m
12:43PM0.17m
1:13AM0.33m
clear
clear
part cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
mod rain
mod rain
light rain
light rain
light rain
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:15
5:13
5:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:04
8:05
8:06
8:07
4
8
9
4
2
1
Temp °C
11
11
12
12
12
13
13
13
13
12
13
14
13
13
12
10
10
8
8
8
9
9
10
10
6
6
7
8
8
8
8
9
10
9
9
10
10
10
9
8
7
4
2
1
3
4
7
7
Swell 1
Height (m)
Direction
Period (s)
0.1
SE
9
0.1
E
9
0.1
E
9
0.1
E
9
0.5
NE
4
0.4
ENE
4
0.3
ENE
4
0.2
ENE
4
0.2
ENE
4
0.2
E
3
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
18
0.1
E
12
0.1
E
12
1.3
ESE
7
1.2
ESE
7
Energy kJ
3
2
2
2
10
7
3
1
1
1
2
2
2
2
2
2
2
2
2
6
3
3
144
121
Swell 2
Height (m)
Direction
Period (s)
0.1
E
13
0.1
E
11
0.1
E
11
0.1
E
11
0.1
E
9
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
E
10
0.1
NE
4
0.1
E
13
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
18
Energy kJ
3
2
2
2
2
2
2
2
2
2
1
3
3
3
3
6
Swell 3
Height (m)
Direction
Period (s)
0.1
E
11
0.1
E
13
0.1
E
13
0.1
E
14
0.1
E
14
0.1
E
13
0.1
E
14
0.1
E
13
0.1
E
18
Energy kJ
2
3
4
4
4
4
4
3
6
Wind waves
Height (m)
Direction
Period (s)
0.8
NE
4
0.8
NE
4
0.7
NE
4
0.6
NE
4
0.2
E
3
0.2
E
3
0.3
E
3
0.3
ESE
3
0.3
ESE
3
0.3
ESE
4
0.4
ESE
3
0.7
SE
4
1.2
ESE
5
1.3
ESE
6
1.8
SE
7
Energy kJ
21
22
19
16
1
1
2
2
2
2
5
17
78
136
279
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
4
4
3
3
3
3
2
1
Distance (km)
273
677
871
890
890
1946
890
1232
846
784
784
1230
725
725
784
742
471
400
399
273
225
190
90
17
Best forecast wave conditions in Massachusetts
Rating
(10 max)
2
2
Best forecast wave conditions in United States
Rating
(10 max)
2
2
2
2
1
2
1
2
2
2
2
1
2
2
2
2
4
4
3
3
3
3
2
3
Header Global
Rating
(10 max)
7
7
6
6
6
5
4
6
7
8
7
6
5
5
5
5
5
5
5
5
5
5
4
4
  • 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

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