Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Issued: 7 am 17 Jun 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
17.6° C

2.5°C warmer than normal for this time of year

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 (17 Jun):

  • Morning surf: Morning surf (17 Jun, local time) - 0.5ft (0.2m), 6s period with E swell.
  • Afternoon surf: Afternoon surf (17 Jun, local time) - 0.5ft (0.1m), 16s period with E swell.
  • Evening surf: Evening surf (17 Jun, local time) - 0.5ft (0.1m), 16s period with E swell.

The current surf forecast for Nantasket Beach at 2PM is: 0.1m 16s primary swell from a East direction and 0.2m 6s secondary swell from a East direction (forecast issued at 07:00am June 17). The wind direction is predicted to be cross-onshore.

Time (EDT) & DateWave HeightWave Period
Morning (17 Jun)0.5ft (0.2m)6s
Afternoon (17 Jun)0.5ft (0.1m)16s
Evening (17 Jun)0.5ft (0.1m)16s

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 5mm), mostly falling on Thu night. Warm (max 27°C on Fri afternoon, min 17°C on Wed night). Winds increasing (light winds from the SW on Wed morning, fresh winds from the S by Thu afternoon).

Wednesday
17
Thursday
18
Friday
19
Sat
20
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 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)
0.3
E
6
0.2
E
6
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
15
0.2
E
8
0.2
E
8
0.2
E
8
1
SE
5
1.2
SSE
6
0.9
SE
7
0.6
SE
7
0.4
ESE
6
0.4
ESE
6
0.3
ESE
6
0.2
ESE
7
0.2
ESE
6
0.2
ESE
6
0.2
E
6
0.2
E
6
0.1
SE
10
Wave Graph
Metric surfscale
Energy kJ
7
3
5
5
5
5
5
4
5
5
6
47
90
75
42
16
15
7
5
3
4
3
3
4
Wind (km/h)
10
SW
10
SW
10
SSE
20
ESE
20
SSE
20
S
15
S
15
SSW
15
S
20
SSE
30
SSE
35
S
30
SSW
20
SSW
15
W
20
W
20
W
25
WSW
25
W
25
W
25
WNW
30
W
25
W
25
W
Wind State
cross-off
cross-off
cross-on
cross-on
cross-on
cross
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-off
cross-off
off
off
off
off
off
off
off
off
off
off
High Tide
1:49PM2.97m
2:00AM3.39m
2:44PM2.95m
2:56AM3.25m
3:40PM2.92m
Low Tide
7:33AM-0.41m
7:44PM0.02m
8:27AM-0.33m
8:41PM0.08m
9:22AM-0.22m
9:40PM0.15m
part cloud
cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
cloud
light rain
cloud
rain showers
rain showers
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:05
5:05
5:05
5:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:22
8:22
8:22
8:22
 mm
1
1
2
1
Temp °C
15
18
22
23
23
21
17
17
17
17
19
24
24
21
21
20
18
19
23
26
27
23
20
18
Feels °C
13
16
20
19
20
18
14
15
15
14
15
20
22
20
20
17
14
14
18
21
22
18
15
13
Swell 1
Height (m)
Direction
Period (s)
0.3
E
6
0.2
E
6
0.2
E
7
0.2
E
6
0.2
E
7
0.2
E
7
0.3
SE
4
0.2
E
7
0.2
E
8
0.2
E
8
0.2
E
8
0.2
E
7
0.2
E
7
0.2
E
8
0.6
SE
7
0.4
ESE
6
0.4
ESE
6
0.3
ESE
6
0.2
ESE
7
0.2
ESE
6
0.2
ESE
6
0.2
E
6
0.2
E
6
0.1
SE
10
Energy kJ
7
3
3
3
4
4
2
4
5
5
4
4
4
4
42
16
15
7
5
3
4
3
3
4
Swell 2
Height (m)
Direction
Period (s)
0.1
E
16
0.1
E
16
0.1
E
16
0.1
E
16
0.2
E
7
0.1
E
15
0.1
SE
8
0.1
SE
8
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
8
0.1
E
7
0.1
E
7
0.2
E
5
0.1
E
5
0.1
E
7
0.1
SE
6
0.1
SE
9
0.1
E
6
Energy kJ
5
5
5
5
4
4
3
3
4
4
4
4
4
1
1
1
2
1
1
1
3
1
Swell 3
Height (m)
Direction
Period (s)
0.1
E
16
0.1
E
16
0.1
E
8
0.1
E
15
0.1
E
15
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
14
0.1
E
7
0.1
SE
8
0.1
E
5
0.1
SE
9
0.1
SE
6
0.1
SE
6
Energy kJ
5
5
1
4
4
4
4
4
4
1
2
1
3
1
1
Wind waves
Height (m)
Direction
Period (s)
0.4
SE
3
0.4
SE
4
0.2
SSE
3
0.2
SSE
3
0.2
SSE
3
0.5
SE
3
1
SE
5
1.2
SSE
6
0.9
SE
7
0.3
W
2
0.3
W
2
0.4
WNW
3
0.4
W
3
0.4
W
3
0.4
W
3
0.4
WNW
3
0.5
WNW
3
0.4
WNW
3
Energy kJ
3
5
1
1
1
6
47
90
75
1
1
2
2
2
2
3
6
3
Nearest Offshore or Glassy
Rating
(10 max)
1
1
2
1
1
1
1
1
1
1
1
3
1
2
1
1
1
1
1
1
1
1
1
1
Distance (km)
113
523
844
950
961
3302
961
523
131
531
1707
3464
743
55
12
12
64
109
85
85
346
102
102
102
Best forecast wave conditions in Massachusetts
Rating
(10 max)
2
1
1
1
1
1
Best forecast wave conditions in United States
Rating
(10 max)
4
4
3
3
2
2
3
4
3
3
3
4
1
4
3
2
3
3
3
1
1
1
2
2
Header Global
Rating
(10 max)
5
4
4
4
5
5
9
9
9
6
5
5
6
5
6
6
6
7
4
4
7
4
4
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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