Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Issued: 1 am 23 Jun 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
15.2° C

Slightly cooler than normal

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 (23 Jun):

  • Morning surf: Morning surf (23 Jun, local time) - 2.5ft (0.8m), 5s period with SE swell.
  • Afternoon surf: Afternoon surf (23 Jun, local time) - 1.5ft (0.4m), 5s period with ESE swell.
  • Evening surf: Evening surf (23 Jun, local time) - 1ft (0.3m), 5s period with ESE swell.

The current surf forecast for Nantasket Beach at 6AM is: 0.8m 5s primary swell from a Southeast direction and 0.5m 4s secondary swell from a Southeast direction, 0.1m 11s secondary swell from a East direction (forecast issued at 01:00am June 23). The wind direction is predicted to be cross-shore.

Time (EDT) & DateWave HeightWave Period
Morning (23 Jun)2.5ft (0.8m)5s
Afternoon (23 Jun)1.5ft (0.4m)5s
Evening (23 Jun)1ft (0.3m)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 22mm), heaviest during Tue morning. Warm (max 27°C on Wed afternoon, min 16°C on Tue afternoon). Wind will be generally light.

Tuesday
23
Wednesday
24
Thursday
25
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
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
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)
0.5
SE
4
0.8
SE
4
0.8
SE
5
0.8
SE
5
0.4
ESE
5
0.4
ESE
5
0.4
ESE
5
0.3
ESE
5
0.3
ESE
5
0.3
ESE
5
0.3
E
5
0.3
E
5
0.3
E
5
0.2
ESE
7
0.2
ESE
7
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.4
SE
8
0.1
SE
8
0.3
SE
4
0.3
SE
4
Wave Graph
Metric surfscale
Energy kJ
7
24
29
31
10
10
7
4
5
5
5
5
5
5
5
6
6
6
6
6
16
3
2
2
Wind (km/h)
15
SSE
15
S
10
SSW
5
SW
10
N
10
N
5
NNE
5
NE
5
NW
5
WNW
10
WNW
10
NW
15
WNW
15
WNW
10
NNW
10
W
10
WNW
10
W
10
W
5
WSW
5
SSE
15
SE
10
SSW
10
WSW
Wind State
cross-on
cross
cross-off
cross-off
cross
cross
glassy
glassy
glassy
off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
off
off
cross-off
glassy
cross-on
cross-off
off
High Tide
6:57AM2.61m
7:23PM2.83m
7:58AM2.51m
8:16PM2.83m
8:58AM2.46m
9:06PM2.83m
Low Tide
00:46AM0.30m
1:03PM0.33m
1:46AM0.30m
1:56PM0.44m
2:45AM0.28m
2:49PM0.51m
cloud
cloud
light rain
mod rain
light rain
light rain
light rain
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:07
5:07
5:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:22
8:23
8:23
 mm
2
7
3
3
1
Temp °C
18
19
20
20
17
16
16
16
16
16
17
23
26
27
25
21
20
18
19
24
26
24
23
19
Feels °C
18
19
21
22
17
16
17
17
17
16
16
21
23
24
23
19
19
16
17
23
25
22
22
18
Swell 1
Height (m)
Direction
Period (s)
0.1
E
11
0.5
SE
4
0.5
SE
5
0.5
SE
5
0.4
ESE
5
0.4
ESE
5
0.4
ESE
5
0.3
ESE
5
0.3
ESE
5
0.3
ESE
5
0.3
E
5
0.3
E
5
0.3
E
5
0.2
ESE
7
0.3
E
4
0.3
E
5
0.3
E
5
0.2
ESE
8
0.2
ESE
8
0.2
ESE
8
0.1
SE
6
0.1
SE
6
0.3
SE
4
0.3
SE
4
Energy kJ
2
9
11
12
10
10
7
4
5
5
4
4
4
5
4
4
4
6
6
6
1
1
2
2
Swell 2
Height (m)
Direction
Period (s)
0.1
E
9
0.1
E
11
0.1
E
11
0.1
E
11
0.2
NNE
3
0.2
NNE
3
0.2
ESE
7
0.2
ESE
7
0.2
ESE
7
0.2
E
4
0.2
ESE
7
0.2
ESE
8
0.2
ESE
8
0.2
E
5
0.2
E
6
0.2
E
5
0.1
SE
8
0.1
SE
8
Energy kJ
2
2
2
2
1
1
5
5
5
1
5
6
6
2
2
2
3
3
Swell 3
Height (m)
Direction
Period (s)
0.1
E
6
0.1
E
6
0.1
SE
7
0.1
E
6
0.1
E
6
0.1
E
6
0.1
E
6
0.1
E
6
0.1
E
7
0.1
E
6
0.1
E
7
0.1
E
7
0.1
SE
7
0.1
SE
7
Energy kJ
1
1
2
1
1
1
1
1
1
1
1
1
2
2
Wind waves
Height (m)
Direction
Period (s)
0.5
SE
4
0.8
SE
4
0.8
SE
5
0.8
SE
5
0.2
NNE
2
0.2
NNE
3
0.2
NNW
2
0.4
SE
8
Energy kJ
7
24
29
31
1
1
1
16
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
2
2
2
1
Distance (km)
442
58
58
12
67
67
108
98
98
87
79
58
58
67
58
58
58
85
90
160
2691
893
523
523
Best forecast wave conditions in Massachusetts
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
2
1
1
2
3
3
3
3
4
1
1
2
1
3
3
3
3
2
2
2
2
Header Global
Rating
(10 max)
5
5
5
5
5
7
8
9
9
8
9
8
7
6
5
5
5
5
5
8
4
4
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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