Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach 48 hour detailed Surf Forecast

Issued: 7 pm 18 Jul 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
19.5° C
0.0° 

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 (19 Jul):

  • Morning surf: Morning surf (19 Jul, local time) - 0.5ft (0.1m), 13s period with E swell.
  • Afternoon surf: Afternoon surf (19 Jul, local time) - 0.5ft (0.1m), 13s period with E swell.
  • Evening surf: Evening surf (19 Jul, local time) - 0.5ft (0.1m), 12s period with E swell.

The current surf forecast for Nantasket Beach at 1AM is: 0.1m 13s primary swell from a East direction (forecast issued at 07:00pm July 18). An open ocean swell of 0.4m 6s is not directed at the surf break, a second open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (EDT) & DateWave HeightWave Period
Morning (19 Jul)0.5ft (0.1m)13s
Afternoon (19 Jul)0.5ft (0.1m)13s
Evening (19 Jul)0.5ft (0.1m)12s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Sat night. Warm (max 26°C on Sun afternoon, min 18°C on Sun night). Wind will be generally light.

Sat
18
Sunday
19
Monday
20
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
S
4
0.6
S
5
0.5
S
3
0.1
E
13
0.1
E
13
0.3
SE
6
0.2
ESE
7
0.1
E
13
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
0.1
E
12
Wave Graph
Metric surfscale
Energy kJ
13
16
5
3
3
6
4
3
3
3
3
3
3
3
3
3
3
3
3
Wind (km/h)
30
SSW
30
SSW
20
SW
25
WSW
20
W
25
NW
25
NW
20
NW
15
NW
10
NNW
15
NNW
10
NW
10
WNW
10
WNW
5
NW
5
SE
20
SE
20
S
20
SSW
Wind State
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
cross-on
cross-on
cross
cross-off
High Tide
3:14PM3.01m
3:31AM3.02m
4:05PM2.96m
4:26AM2.83m
4:57PM2.90m
Low Tide
9:18PM0.06m
9:47AM-0.05m
10:14PM0.15m
10:38AM0.12m
light rain
rain showers
thunderstorm
thunderstorm
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:22
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:15
8:15
8:15
 mm
1
2
3
2
Temp °C
20
20
22
22
21
20
22
25
26
25
21
19
18
19
24
26
26
23
20
Feels °C
17
18
22
21
21
16
17
21
22
22
18
16
15
16
22
24
21
19
16
  • 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.


Nearest locationNearest