Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach Surf Forecast and Surf Report

Issued: 7 am 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nantasket Beach sea temperature is
19.7° C
0.7° 

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 19 Aug 2026:

  • Most powerful swell: Saturday 22 Aug, 5PM (local time) - 3.5ft (1.1m), 6s period, E swell with 80 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 1.1m 6s and forecast to arrive on Saturday (Aug 22) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Wednesday (Aug 26) at 2AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5PM (Sat 22nd Aug)3.5ft (1.1m) 6s

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


The Lowdown

G’day, Rusty here. I’ll be straight with you – this is a grim stretch for Nantasket Beach. Over the next 16 days, there’s nothing even close to a proper surf session. The forecast is a long, flat, and messy run with no real standouts to get excited about.

We start off Wednesday the 19th clean but tiny, with swell a mere 1ft from the ESE and a weak 6-second period. The combined energy is a measly 15, so it’s basically a lake. Thursday the 20th morning brings glassy conditions with a 1ft swell from the ESE, period 8 seconds, and energy just 12 – still barely a ripple. The pattern continues: Friday the 21st through Sunday the 23rd sees a bit more size, up to 2ft, but the wind swings onshore or cross-on, and the period drops to 5 seconds, making it choppy and weak. The first week is a total washout.

Into the second week, Monday the 24th and Tuesday the 25th stay flat with 0.7ft swells and long periods around 11-12 seconds, but the energy is pathetic – 20 or less. Wednesday the 26th is even worse, with 0.3ft and strong cross-onshore winds. There’s a tiny spike on Thursday the 27th with 5ft to 5ft swell from the ENE, period 6 seconds, and energy jumping to 127 and then 311, but the wind is cross-shore and messy, and the surf quality is still rated as poor. The period is too short to hold shape, and it’s more of a choppy mess than anything rideable.

From Friday the 28th onward, it’s back to small, weak surf – 1ft to 3ft – with periods all over the place. The water temperature is 68°F, which is about 1° cooler than average for this time of year. Nothing special there.

Honestly, this is a blank run. Nantasket Beach is a consistent spot, so it’s a bit unusual to see such a long stretch of poor surf, but it happens. The forecast can change, but for now, I’d leave the boards at home. The only hint of energy is that Thursday the 27th pulse, but it’s not worth a paddle. When the swell is that short and the wind is that messy, kite surfing might be more interesting than trying to catch a wave.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 30°C on Wed afternoon, min 19°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 44mm), heaviest during Sat afternoon. Warm (max 26°C on Mon afternoon, min 15°C on Sat night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
AM
PM
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
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
6
0.3
ESE
6
0.4
SE
6
0.3
ESE
8
0.4
ESE
7
0.4
ESE
8
0.4
E
8
0.4
ESE
8
0.4
ESE
8
0.7
E
4
1.1
E
6
0.8
ENE
6
0.6
ENE
5
0.5
E
6
0.2
E
12
0.2
E
12
0.2
E
11
0.2
E
11
0.2
E
11
0.2
E
11
0.2
E
11
Wave Graph
Metric surfscale
Energy kJ
8
8
9
12
18
19
22
22
20
17
80
43
20
15
11
11
10
9
9
9
9
Wind (km/h)
5
SW
10
WSW
10
WSW
5
NNW
5
SSW
10
NW
15
NE
10
E
5
ESE
20
E
30
ENE
20
N
5
WSW
15
SSE
15
W
10
WNW
10
W
10
NNW
5
NNE
15
SE
10
SW
Wind State
cross-off
off
cross-off
glassy
cross-off
cross-off
cross-on
on
glassy
on
on
cross
glassy
cross
off
cross-off
off
cross-off
glassy
cross-on
cross-off
High Tide
5:05PM2.78m
5:44AM2.40m
5:58PM2.69m
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
Low Tide
10:48AM0.41m
11:31PM0.33m
11:40AM0.55m
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
clear
clear
clear
part cloud
cloud
clear
clear
clear
part cloud
heavy rain
heavy rain
light rain
cloud
part cloud
clear
clear
clear
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
5:56
5:56
5:58
5:58
6:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:38
7:37
7:36
7:34
7:32
7:30
7:29
 mm
11
31
2
Temp °C
27
30
27
27
28
26
21
22
21
19
18
18
17
25
22
23
26
24
20
23
21
Feels °C
28
29
26
27
27
25
19
20
19
19
16
16
18
25
22
22
23
22
18
19
19
  • 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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