Nantasket Beach surf break

Nantasket Beach surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 1 pm Tuesday 19 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
10.9° C
(Which is slightly warmer than usual)

How big are the waves at Nantasket Beach today?

The current surf forecast for Nantasket Beach at 5PM is: 0.2m 9s primary swell from a East-southeast direction and 0.1m 16s secondary swell from a East direction, 0.6m 3s secondary swell from a South direction (forecast issued at 01:00pm May 19). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (19 May)0.5ft (0.2m)9s
Afternoon (19 May)0.5ft (0.2m)9s
Evening (19 May)0.5ft (0.2m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 34°C on Tue afternoon, min 11°C on Thu night). Wind will be generally light.

Tue
19
Wednesday
20
Thursday
21
Fri
22
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
5 AM
8 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)
0.2
ESE
9
0.2
ESE
10
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.7
NE
5
0.6
NE
5
0.4
NE
5
0.4
NE
4
0.3
NE
4
0.1
E
13
0.1
E
11
Wave Graph
Metric surfscale
Energy kJ
7
9
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
27
22
8
5
3
3
3
Wind (km/h)
15
SW
20
SW
25
SSW
15
WSW
15
SW
15
SW
15
SW
20
SW
20
W
25
WNW
25
WNW
15
W
15
W
20
NNW
15
NNW
15
N
15
NE
10
ESE
15
SE
10
S
10
WSW
10
NNE
10
NNE
10
NNE
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
off
off
cross-off
cross-off
cross-off
cross-on
on
cross-on
cross-off
cross-off
cross
cross
cross-on
High Tide
2:03PM2.96m
2:13AM3.39m
2:59PM2.89m
3:10AM3.25m
3:59PM2.82m
4:12AM3.08m
Low Tide
7:58PM0.05m
8:42AM-0.32m
8:55PM0.13m
9:40AM-0.19m
9:55PM0.23m
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:16
5:16
5:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:00
8:01
8:02
8:04
Temp °C
30
34
32
27
24
23
23
25
29
31
29
24
21
17
15
13
12
12
12
13
12
12
11
11
29
31
30
27
24
23
23
24
27
28
26
21
18
13
10
8
8
8
8
10
9
8
7
8
Swell 1
Height (m)
Direction
Period (s)
0.2
ESE
9
0.2
ESE
10
0.2
ESE
9
0.5
SSE
4
0.2
SSE
4
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.7
NE
5
0.6
NE
5
0.4
NE
5
0.4
NE
4
0.1
SE
9
0.1
NE
4
0.1
SE
9
Energy kJ
7
9
8
11
2
8
8
8
8
8
8
8
8
8
8
8
8
27
22
8
5
3
1
3
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
4
0.1
E
13
0.1
E
16
0.2
ESE
9
0.2
ESE
9
0.1
SE
4
0.1
E
12
0.1
SE
5
0.1
E
12
0.1
E
12
0.1
E
12
0.1
SE
5
0.1
E
14
0.1
E
15
0.1
E
15
0.2
ESE
9
0.2
ESE
9
0.2
ESE
9
0.1
SE
9
0.1
E
11
0.1
SE
9
0.1
NE
4
Energy kJ
1
3
5
8
8
1
3
1
3
3
3
1
4
4
4
8
8
8
3
2
3
1
Swell 3
Height (m)
Direction
Period (s)
0.1
E
16
0.1
E
16
0.1
E
12
0.1
E
12
0.2
SSE
5
0.1
E
15
0.1
E
12
0.1
E
12
0.1
E
14
0.1
E
15
0.1
E
14
0.1
E
11
0.1
E
13
0.1
E
11
Energy kJ
5
5
3
3
2
4
3
3
4
4
4
2
3
2
Wind waves
Height (m)
Direction
Period (s)
0.2
SSW
2
0.3
SSW
2
0.6
S
3
0.4
SW
3
0.2
WSW
3
0.2
WSW
2
0.3
W
2
0.3
WNW
3
0.4
NW
3
0.4
NW
3
0.3
NW
3
0.3
NW
2
0.4
NNW
3
0.4
N
4
0.4
NNE
4
0.3
NE
4
0.2
ENE
2
0.2
ENE
3
Energy kJ
1
1
8
3
1
1
1
1
2
2
1
1
3
4
8
3
1
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
69
131
55
12
55
55
55
72
336
336
314
93
85
98
118
117
117
186
160
534
160
160
160
830
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
2
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
2
2
2
2
2
2
2
2
2
1
1
2
2
3
3
1
1
1
1
2
2
2
2
Header Global
Rating
(10 max)
4
4
4
5
5
5
4
4
4
5
5
4
4
5
5
4
4
4
4
5
5
5
7
8
  • 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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