Nantasket Beach surf break

Nantasket Beach surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 pm Thursday 14 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
10.3° C
(Which is 1.0°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 2AM is: 0.8m 6s primary swell from a East direction and 0.2m 10s secondary swell from a East direction (forecast issued at 07:00pm May 14). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (15 May)2.5ft (0.7m)9s
Afternoon (15 May)4.5ft (1.4m)10s
Evening (15 May)4.5ft (1.4m)10s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 7mm), mostly falling on Thu night. Warm (max 28°C on Sun afternoon, min 9°C on Fri afternoon). Wind will be generally light.

Thu
14
Friday
15
Saturday
16
Sun
17
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
5 AM
8 AM
11 AM
2 PM
Rating
(10 max)
0
0
0
0
1
1
2
0
0
1
2
2
2
1
1
1
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)
1
ESE
6
0.7
E
6
0.7
E
6
0.8
E
6
1
E
7
0.7
ESE
9
1.3
E
10
1.4
E
10
1.5
E
10
1.4
ENE
10
1.3
E
10
1.2
E
10
1.1
E
10
1
E
9
0.9
E
9
0.8
E
9
0.7
E
9
0.6
E
9
0.5
E
9
0.5
E
8
0.4
ESE
8
0.4
ESE
8
0.4
ESE
8
0.3
ESE
8
Wave Graph
Metric surfscale
Energy kJ
58
30
32
50
92
79
305
371
440
394
326
268
216
171
134
104
78
55
36
35
24
23
22
13
Wind (km/h)
10
E
5
N
10
NNW
10
NNW
10
NW
10
NW
10
NNW
15
NNE
15
NNE
10
NNE
10
NW
0
WSW
10
WSW
15
WSW
15
WSW
15
SW
15
WSW
25
SSW
20
SW
20
SW
15
WSW
15
WSW
10
WNW
10
WNW
on
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross
cross
cross-off
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
off
High Tide
9:56PM3.20m
10:31AM2.94m
10:44PM3.36m
11:22AM3.00m
11:33PM3.47m
12:14PM3.02m
Low Tide
3:41PM0.09m
4:18AM-0.19m
4:30PM0.02m
5:09AM-0.35m
5:19PM-0.03m
6:00AM-0.45m
light rain
light rain
light rain
cloud
cloud
cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:20
5:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:55
7:57
7:58
7:59
4
5
2
Temp °C
11
11
11
10
10
10
10
10
9
9
9
10
10
12
19
22
24
18
15
15
16
19
24
27
10
11
10
8
8
8
8
7
6
6
7
9
7
9
16
18
20
13
10
11
13
18
22
24
Swell 1
Height (m)
Direction
Period (s)
0.7
ESE
6
0.7
E
6
0.7
E
6
0.8
E
6
1
E
7
0.8
ENE
7
1.3
E
10
1.4
E
10
1.5
E
10
1.4
ENE
10
1.3
E
10
1.2
E
10
1.1
E
10
1
E
9
0.9
E
9
0.8
E
9
0.7
E
9
0.6
E
9
0.5
E
9
0.5
E
8
0.4
ESE
8
0.4
ESE
8
0.4
ESE
8
0.3
ESE
8
Energy kJ
33
30
32
50
92
60
305
371
440
394
326
268
216
171
134
104
78
55
36
35
24
23
22
13
Swell 2
Height (m)
Direction
Period (s)
0.1
E
10
0.2
E
10
0.2
E
10
0.2
E
10
0.2
ESE
9
0.7
ESE
9
0.1
S
9
0.2
S
4
Energy kJ
2
8
8
8
8
79
2
1
Swell 3
Height (m)
Direction
Period (s)
0.1
E
11
0.1
S
10
0.2
SSE
6
Energy kJ
2
2
3
Wind waves
Height (m)
Direction
Period (s)
1
ESE
6
0.3
WSW
2
0.2
SSW
2
0.4
S
4
0.5
S
3
0.4
SW
3
0.3
SW
3
0.2
WSW
2
Energy kJ
58
1
1
6
4
2
1
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
2
1
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
113
12
12
7
0
0
0
32
17
17
0
0
0
0
0
0
26
55
131
26
55
55
55
69
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
1
1
1
2
3
3
3
2
3
3
3
2
2
2
1
1
1
1
1
2
1
1
Best forecast wave conditions in United States
Rating
(10 max)
1
1
2
3
3
3
3
3
2
3
3
3
5
2
3
2
2
2
3
4
1
1
4
2
Header Global
Rating
(10 max)
5
4
6
5
5
5
5
5
5
5
5
5
4
5
5
5
5
5
4
5
8
8
9
5
  • 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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