Nantasket Beach Surf Break

Lat Long: 42.31° N 70.88° W

Nantasket Beach Surf Forecast and Surf Report

Issued: 7 pm 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 20 Aug 2026:

  • Best quality surf: Monday 24 Aug, 8PM (local time) - 2.5ft (0.7m), 6s period, SSE swell with offshore winds.
  • Most powerful swell: Sunday 23 Aug, 2AM (local time) - 2.5ft (0.7m), 6s period, E swell with 30 kJ wave energy.
  • Next surfable swell (1★+): Monday 24 Aug, 8PM (local time) - 2.5ft (0.7m), 6s period with SSE swell.

Best Forecast Surf Conditions for Nantasket Beach this week:

The surf forecast for Nantasket Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 8PM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.4m and 6s. Another secondary swell of 0.2m and 11s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Nantasket Beach in the next 16 days are 0.7m 6s and forecast to arrive on Sunday (Aug 23) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Tuesday (Aug 25) at 8AM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Mon 24th Aug)2.5ft (0.7m) 6s
Best Surf 8PM (Mon 24th Aug)2.5ft (0.7m) 6s
Most Powerful 2AM (Sun 23rd Aug)2.5ft (0.7m) 6s

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


The Lowdown

Alright folks, Rusty here. Let's take a long, hard look at what Nantasket Beach has in store for us over the next couple of weeks. Gotta be straight with you—this is a tough one to write.

Honestly, for the next sixteen days, Nantasket Beach is looking flat and pretty lifeless. We’ve got a solid stretch with nothing to get excited about. The first solid run of surf... well, it never really shows up. From Thursday the 20th of August all the way through to Friday the 4th of September, every single session is marked as poor surf conditions. That’s a long, quiet spell.

The first few days are just tiny. Thursday morning, we're looking at a pathetic 1.0 ft of swell coming out of the ESE with a short period of 8 seconds. The combined energy is barely a whisper at (12), and with glassy conditions it might look pretty, but there’s nothing to ride. That theme just keeps going—tiny 1 ft waves, onshore or cross-onshore winds, and energy values staying in the low teens and twenties. Friday the 21st has some NE wind messing up what little swell there is.

We get a bit of a bump on Saturday the 22nd of August—heavy rain and a gusty 19 mph ENE wind whipping up a messy 3 ft from the ESE. The period drops to a terrible 4 seconds, so it's just wind slop. Energy is still weak at (47). Not worth getting wet for anything but a kite, honestly.

The best wind we see comes on Monday the 24th, with clean offshore winds from the W and WNW on the 25th. But the swell is still tiny—1 ft and 0.7 ft—with periods that are either too short or have a bit of length (11 seconds on the 25th) but no height to push them. The combined energy drops to (16). It’s clean enough to look at, but you won't be catching much.

There’s a slight lift in size on the 28th of August, with swell hitting 3 ft from the SE, but that’s a short-period 5-second windswell blowing in from the NE and ENE, making it lumpy and cross-onshore. That 3 ft might sound tempting, but with only 5 seconds of period, it’s just a bumpy mess for a beach break like this. Energy sits at (49)—still weak. The rest of the run into early September is the same story: tiny waves, weak energy, and mostly onshore or cross-shore winds.

There are no standout days here. Nothing even close. For a spot that’s usually consistent, this is a rough patch. The water temp is about average for the time of year, but that doesn’t help the lack of rideable swell.

Keep the board in the car, maybe go for a paddle if you just need to get wet, but there’s nothing worth a session here for the next sixteen days. Forecasts can change, so don't lose hope entirely, but right now? It’s a flat spell, plain and simple.

Rusty.

Short Range Forecast

Heavy rain (total 36mm), heaviest during Sat afternoon. Warm (max 28°C on Wed night, min 16°C on Sat afternoon). Winds increasing (calm on Thu morning, fresh winds from the ENE by Sat afternoon).

Days 5-7 Weather Summary

Heavy rain (total 28mm), heaviest during Sat night. Warm (max 26°C on Mon afternoon, min 15°C on Sat night). Wind will be generally light.

Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
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
6
0.3
ESE
8
0.4
ESE
7
0.4
ESE
8
0.4
E
8
0.4
E
8
0.4
ESE
8
0.4
E
8
0.8
ESE
4
0.7
E
6
0.5
E
6
0.5
E
7
0.4
ESE
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
Wave Graph
Metric surfscale
Energy kJ
7
12
18
19
22
21
21
18
21
30
17
22
12
13
13
9
9
9
9
Wind (km/h)
10
WSW
0
ENE
5
E
10
WNW
15
NE
15
E
0
S
15
SE
30
ENE
15
N
0
NNE
5
S
10
SSW
15
W
20
W
15
WNW
20
WNW
15
W
10
WSW
Wind State
cross-off
glassy
glassy
off
cross-on
on
glassy
cross-on
on
cross
glassy
cross
cross-off
off
off
off
off
off
off
High Tide
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
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
part cloud
part cloud
part cloud
clear
clear
part cloud
mod rain
heavy rain
heavy rain
light rain
cloud
light rain
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
6
30
23
3
2
Temp °C
28
26
28
21
22
22
21
19
16
18
16
20
20
23
26
23
20
24
23
Feels °C
27
27
28
20
20
19
19
20
14
17
17
22
21
21
22
20
16
20
20
  • Map Icons:
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  • 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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