Nantasket Beach surf break

Nantasket Beach surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 7 pm Tuesday 12 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
10.0° C
(Which is 1.2°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 4AM is: 0.3m 7s primary swell from a East-southeast direction and 0.3m 7s secondary swell from a East direction (forecast issued at 07:00pm May 12). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (13 May)1ft (0.3m)7s
Afternoon (13 May)2ft (0.6m)4s
Evening (13 May)2ft (0.6m)5s

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 20mm), heaviest during Thu afternoon. Very mild (max 16°C on Wed afternoon, min 8°C on Tue night). Winds decreasing (fresh winds from the SSW on Wed afternoon, light winds from the SE by Thu night).

Tue
12
Wednesday
13
Thursday
14
Fri
15
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
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)
0.5
E
8
0.5
E
7
0.4
E
7
0.3
E
7
0.3
ESE
7
0.3
ESE
7
0.3
ESE
7
0.2
E
10
0.7
SSE
4
0.7
SSE
4
0.5
SSE
5
0.4
SSE
5
0.4
SE
5
0.6
SE
5
0.8
ESE
5
0.9
ESE
5
0.9
ESE
6
1.1
E
6
1.1
E
7
1
E
7
0.9
E
7
0.8
ESE
9
1.3
E
10
1.3
E
10
Wave Graph
Metric surfscale
Energy kJ
29
27
15
9
9
10
10
8
17
21
13
9
7
18
33
39
56
100
107
94
73
118
312
327
Wind (km/h)
5
ESE
5
SSE
5
SSW
5
WSW
10
SW
10
SSW
15
S
25
S
30
SSW
25
SSW
20
SSW
20
S
15
SSE
20
SE
20
SE
15
ESE
5
S
10
S
10
SSE
5
SE
10
ENE
15
NE
20
NNE
20
NE
glassy
cross-on
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross-off
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
8:19PM2.81m
8:45AM2.76m
9:08PM3.00m
9:39AM2.85m
9:56PM3.20m
10:31AM2.94m
Low Tide
2:01PM0.27m
2:33AM0.22m
2:52PM0.19m
3:27AM0.01m
3:41PM0.09m
4:18AM-0.19m
cloud
clear
clear
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
mod rain
mod rain
part cloud
part cloud
cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:24
5:22
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:53
7:54
7:55
7:57
1
3
10
6
Temp °C
14
13
12
10
8
10
12
16
16
14
14
14
13
14
14
12
12
12
12
11
10
10
9
9
11
10
9
7
4
7
8
10
10
8
10
10
10
11
11
9
11
11
11
10
8
7
5
4
Swell 1
Height (m)
Direction
Period (s)
0.5
E
8
0.5
E
7
0.4
E
7
0.3
E
7
0.3
E
6
0.3
ESE
7
0.3
ESE
7
0.2
ESE
7
0.2
ESE
7
0.2
E
7
0.2
E
7
0.2
E
7
0.2
E
7
0.2
E
7
0.1
E
10
0.1
E
10
0.9
ESE
6
1.1
E
6
1.1
E
7
1
E
7
0.9
E
7
0.9
E
6
1.3
E
10
1.3
E
10
Energy kJ
29
27
15
9
7
10
10
4
4
4
4
4
4
4
2
2
56
100
107
94
73
68
312
327
Swell 2
Height (m)
Direction
Period (s)
0.3
NE
4
0.2
NNE
4
0.3
SE
4
0.3
ESE
7
0.3
ESE
7
0.2
E
7
0.2
E
7
0.2
E
7
0.2
E
7
0.2
ESE
6
0.1
SE
6
0.1
E
10
0.1
E
10
0.1
E
10
0.2
E
10
0.1
E
10
0.1
E
11
0.8
SE
7
0.5
E
9
0.8
ESE
9
0.1
S
10
Energy kJ
3
2
2
9
9
4
4
4
4
4
2
2
2
2
8
2
2
64
42
118
2
Swell 3
Height (m)
Direction
Period (s)
0.2
E
11
0.2
ESE
3
0.1
NE
4
0.2
SSE
4
0.2
E
10
0.2
E
10
0.2
E
10
0.2
E
10
0.2
E
10
0.2
E
10
0.1
E
10
0.1
E
6
0.1
E
13
0.1
S
9
Energy kJ
10
1
1
1
8
8
8
8
8
8
2
1
3
2
Wind waves
Height (m)
Direction
Period (s)
0.5
SSE
3
0.2
WSW
2
0.5
S
3
0.7
SSE
4
0.7
SSE
4
0.5
SSE
5
0.4
SSE
5
0.4
SE
5
0.6
SE
5
0.8
ESE
5
0.9
ESE
5
Energy kJ
5
1
5
17
21
13
9
7
18
33
39
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
Distance (km)
12
55
12
67
58
58
1232
1232
1232
961
399
529
359
383
340
113
7
26
26
7
32
32
32
32
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
1
1
1
1
1
2
2
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
1
1
2
2
2
2
2
1
1
1
1
2
3
3
3
2
2
2
2
2
3
3
3
2
Header Global
Rating
(10 max)
9
9
9
9
9
8
7
9
9
9
9
5
5
5
5
5
4
5
5
5
5
5
5
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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