Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach Surf Forecast and Surf Report

Issued: 7 pm 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
19.6° C
0.8° 

Nantasket Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Nantasket Beach surf forecast from 21 Aug 2026:

  • Most powerful swell: Saturday 22 Aug, 2PM (local time) - 4ft (1.2m), 6s period, ENE swell with 94 kJ wave energy.

Best Forecast Surf Conditions for Nantasket Beach this week:

The most powerful waves expected at Nantasket Beach in the next 16 days are 1.2m 6s and forecast to arrive on Saturday (Aug 22) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2PM (Sat 22nd Aug)4ft (1.2m) 6s

Table - best surf conditions forecast for Nantasket Beach over the next 16 days.


The Lowdown

Rusty here with the rundown on Nantasket Beach. Honestly, it’s a flat spell – from today (21 Aug) all the way to the 5th of September, there’s nothing worth jumping in for. The swell’s barely there – most days we’re talking less than a foot or two, and when there’s a tiny pulse, the wind’s often onshore or cross making it choppy. Even the clean windows with offshore breeze have almost no wave energy. The biggest swell is about 4ft on the morning of the 22nd, but it’s only 5 seconds and cross-onshore, so it’s a closeout mess. Energy readings are low – mostly in the teens or twenties (like 29, 36, 61 at best). For a break that’s usually consistent and exposed to NE swell, this is a weird quiet stretch. But Nantasket’s known to bounce back, so don’t lose hope. Keep checking. That’s all from me – Rusty.

Short Range Forecast

Heavy rain (total 35mm), heaviest during Sun morning. Warm (max 21°C on Thu night, min 16°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Mon afternoon, min 17°C on Mon night). Wind will be generally light.

Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
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)
0.3
ESE
8
0.4
E
8
0.3
E
8
0.3
E
8
1.1
E
5
1
E
6
0.6
E
6
0.4
E
6
0.5
E
6
0.5
E
6
0.4
ESE
6
0.4
ESE
6
0.2
E
11
0.2
E
11
0.2
E
11
0.2
E
11
0.1
E
13
0.4
SE
6
0.3
ESE
8
Wave Graph
Metric surfscale
Energy kJ
11
22
12
11
69
64
22
9
15
18
13
13
9
9
9
9
3
9
11
Wind (km/h)
15
NE
20
NE
15
NE
10
NNE
20
NE
15
NNE
10
N
5
NNE
5
N
10
WSW
5
SW
15
W
15
W
15
W
15
W
10
WNW
5
NW
15
SE
10
SSW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross
cross-off
cross-off
off
off
off
off
cross-off
glassy
cross-on
cross-off
High Tide
6:41AM2.30m
6:52PM2.64m
7:41AM2.26m
7:49PM2.62m
8:40AM2.27m
8:46PM2.66m
9:34AM2.33m
9:38PM2.73m
10:18AM2.43m
10:23PM2.82m
10:58AM2.54m
11:04PM2.90m
Low Tide
00:28AM0.41m
12:35PM0.65m
1:27AM0.45m
1:31PM0.69m
2:27AM0.45m
2:28PM0.67m
3:22AM0.40m
3:21PM0.60m
4:08AM0.32m
4:08PM0.50m
4:47AM0.23m
4:49PM0.39m
heavy rain
light rain
clear
part cloud
cloud
light rain
mod rain
heavy rain
light rain
part cloud
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:58
5:58
6:00
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:37
7:36
7:34
7:32
7:30
7:29
7:28
 mm
12
1
2
8
11
1
Temp °C
21
20
20
19
19
18
18
19
20
20
25
27
25
23
27
24
22
25
23
Feels °C
20
18
17
19
17
16
18
21
22
22
25
24
23
19
23
22
22
24
21
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Nantasket Beach Surf forecast

The above surf forecast table for Nantasket Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nantasket Beach can be found by selecting the local surf guide option on the grey menu. Our Nantasket Beach surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Nantasket Beach) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Nantasket Beach may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Nantasket Beach is 8 km (5 miles) from the city of Hingham. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Hingham. Hingham has rooms for a wide range of budgets as well as car hire and transport links.

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