Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 1 am 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
20.6° C
1.2° 

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 Jul):

  • Morning surf: Morning surf (17 Jul, local time) - 0.5ft (0.1m), 15s period with E swell.
  • Afternoon surf: Afternoon surf (17 Jul, local time) - 0.5ft (0.1m), 14s period with E swell.
  • Evening surf: Evening surf (17 Jul, local time) - 0.5ft (0.1m), 14s period with E swell.

The current surf forecast for Nantasket Beach at 8AM is: 0.1m 15s primary swell from a East direction (forecast issued at 01:00am July 17). The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (17 Jul)0.5ft (0.1m)15s
Afternoon (17 Jul)0.5ft (0.1m)14s
Evening (17 Jul)0.5ft (0.1m)14s

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


Short Range Forecast

Light rain (total 5mm), mostly falling on Sat night. Warm (max 30°C on Sat afternoon, min 18°C on Sun night). Winds increasing (calm on Fri night, fresh winds from the SSW by Sat afternoon).

Friday
17
Saturday
18
Sunday
19
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)
0.1
E
15
0.1
E
15
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
14
0.1
E
14
0.1
E
14
0.1
E
14
0.5
S
3
0.8
S
4
0.7
S
4
0.5
S
5
0.5
SE
6
0.3
SE
6
0.1
E
13
0.1
E
13
0.1
E
13
0.1
E
12
0.1
E
12
0.1
E
12
Wave Graph
Metric surfscale
Energy kJ
5
5
4
4
4
4
4
4
4
4
4
4
5
19
12
11
19
5
3
4
3
3
3
3
Wind (km/h)
15
NW
15
WNW
15
WNW
15
NW
10
NNW
5
ESE
10
SE
10
S
5
WSW
10
WSW
10
SW
15
SSW
30
SSW
30
SSW
30
SSW
25
SSW
20
SW
25
WSW
20
WNW
25
NW
20
NW
15
NNW
20
NNW
15
NW
Wind State
cross-off
off
cross-off
cross-off
cross-off
cross-on
cross-on
cross
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
1:45AM3.33m
2:24PM3.02m
2:38AM3.20m
3:14PM3.01m
3:31AM3.02m
4:05PM2.96m
Low Tide
8:08AM-0.31m
8:24PM-0.01m
8:57AM-0.20m
9:18PM0.06m
9:47AM-0.05m
10:14PM0.15m
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
light rain
thunderstorm
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:20
5:22
5:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:16
8:15
8:15
 mm
3
2
Temp °C
21
19
21
24
26
26
24
23
21
20
21
28
30
25
21
21
22
22
23
24
26
26
24
22
Feels °C
19
16
17
20
23
24
22
22
20
18
19
26
25
21
18
20
22
21
21
19
22
22
20
19
  • 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
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nantasket Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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