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Surf Forecasts:

Nantasket Beach surf break

Nantasket Beach surfForecast / Massachusetts / USA

information circle48hr Weather and Surf, issued 6 am Tuesday 20 Jan 2026 EST
Forecast update in hr  min  s Forecast update imminent
Nantasket Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nantasket Beach sea temperature is
4.3° C
 (Which is slightly cooler than normal)

How big are the waves at Nantasket Beach today?

The current surf forecast for Nantasket Beach at 8AM is: 0.3m 9s primary swell from a East-southeast direction and 0.2m 7s secondary swell from a East direction (forecast issued at 06:00am January 20). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (EST) & DateWave HeightWave Period
Morning (20 Jan)1ft (0.3m)9s
Afternoon (20 Jan)0.5ft (0.2m)9s
Evening (20 Jan)0.5ft (0.2m)9s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Tuesday
20
Wednesday
21
Thursday
22
Fri
23
4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM4 AM7 AM10 AM1 PM4 PM7 PM10 PM1 AM
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
See all maps
Wave Height (m) & direction (?)
0.3
ESE
0.3
ESE
0.3
ESE
0.2
ESE
0.2
ESE
0.2
ESE
0.2
ESE
0.2
ESE
0.2
ESE
0.2
E
0.2
E
0.2
E
0.2
E
0.2
E
0.2
E
0.2
E
0.3
ESE
0.3
ESE
0.3
ESE
0.3
ESE
0.2
E
0.3
ESE
0.3
ESE
0.3
ESE
Period(s) (?)109999999101010101010991010101011101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)1817178888998887777181919189212221
Wind
(km/h)
20
W
20
W
25
W
25
W
25
WNW
25
W
25
W
20
WSW
20
WSW
15
SW
20
SW
20
SW
25
SW
20
SSW
30
SSW
30
SW
25
SW
20
SW
25
WSW
25
WSW
20
WSW
20
SW
10
W
10
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffoffoffoffoffoffoffcross-
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		offoff
High Tide
/ height (m)
12:03PM
3.00
12:36AM
2.65
12:43PM
3.01
1:14AM
2.73
1:24PM
2.97
Low Tide
/ height (m)
5:50AM
0.21
6:23PM
-0.07
6:30AM
0.16
7:01PM
-0.10
7:13AM
0.11
7:39PM
-0.10
Tuesday
20
Wednesday
21
Thursday
22
Fri
23
Sunrise--7:07-------7:05-------7:05-----
Sunset----4:40-------4:43-------4:44---
clear
clear
clear
cloud
part cloud
clear
clear
clear
clear
clear
clear
cloud
cloud
cloud
cloud
cloud
cloud
part cloud
clear
clear
cloud
cloud
part cloud
cloud
Rain (mm)
------------------------
Temp. °C-4-6-7-5-6-8-9-9-9-9-8-4-3-23221355320
Feels °C (?)-11-14-15-14-15-16-17-16-16-15-15-12-11-9-5-7-6-6-4-2-1-3-3-4
  • 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

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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.

View detailed surf forecast for Nantasket Beach at:
surf-forecast.com

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