Surf Forecasts:
How big are the waves at Nantasket Beach today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 1ft (0.3m), 7s period with ESE swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 0.5ft (0.2m), 9s period with E swell.
- Evening surf: Evening surf (20 Sep, local time) - 1ft (0.3m), 9s period with E swell.
The current surf forecast for Nantasket Beach at 8AM is: 0.3m 7s primary swell from a East-southeast direction and 0.3m 5s secondary swell from a East-northeast direction, 0.4m 3s secondary swell from a Southeast direction (forecast issued at 01:00am September 20). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 1ft (0.3m) | 7s |
| Afternoon (20 Sep) | 0.5ft (0.2m) | 9s |
| Evening (20 Sep) | 1ft (0.3m) | 9s |
Table - waves today at Nantasket Beach. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 11mm), heaviest on Sun night. Very mild (max 16°C on Sun night, min 11°C on Tue afternoon). Winds increasing (light winds from the W on Sun night, fresh winds from the ENE by Tue night). | ||||||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 22 | ||||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | E 11 | E 9 | E 11 | E 9 | SE 4 | E 8 | E 8 | NNE 4 | NNE 5 | NE 6 | NE 6 | ENE 6 | ENE 6 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 10 | 10 | 10 | 9 | 6 | 9 | 14 | 18 | 12 | 12 | 24 | 61 | 86 | 80 | 55 | 43 | 42 | 62 | 124 | 169 | 181 | 165 | 156 | 142 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross | cross-on | cross-on | cross | off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:00AM2.26m | 7:09PM2.57m | 7:57AM2.29m | 8:06PM2.61m | 8:51AM2.37m | 9:00PM2.69m | ||||||||||||||||||
Low Tide | 00:44AM0.50m | 12:52PM0.72m | 1:42AM0.50m | 1:49PM0.68m | 2:36AM0.45m | 2:44PM0.59m | ||||||||||||||||||
 | |  | |  | |  | | | |  |  | | |  | | | | | | | | | | |
 | — | 6:28 | — | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:30 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:43 | — | — | — | — | — | — | — | 6:40 | — | — |
mm | — | — | — | — | 1 | 2 | 3 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 14 | 15 | 14 | 15 | 16 | 16 | 13 | 12 | 12 | 14 | 15 | 15 | 16 | 15 | 15 | 14 | 12 | 12 | 12 | 11 | 12 | 12 |
Feels °C | 11 | 11 | 11 | 13 | 12 | 12 | 16 | 17 | 10 | 8 | 8 | 9 | 11 | 11 | 12 | 10 | 10 | 10 | 7 | 6 | 6 | 5 | 6 | 6 |
Swell 1 Height (m) Direction Period (s) | NE 5 | NE 5 | ENE 5 | ESE 7 | ESE 7 | E 9 | E 9 | ESE 4 | ESE 4 | ESE 4 | E 8 | E 8 | E 10 | E 10 | ENE 6 | ENE 6 | E 10 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 |
| kJ | 6 | 5 | 4 | 5 | 5 | 6 | 14 | 11 | 8 | 4 | 12 | 5 | 2 | 2 | 55 | 43 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
Swell 2 Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | NE 5 | E 9 | ESE 7 | E 11 | E 8 | E 8 | E 8 | ESE 4 | SE 4 | E 10 | — | E 10 | E 10 | — | E 15 | — | — | — | — | — | — |
| kJ | 10 | 10 | 10 | 1 | 6 | 5 | 2 | 12 | 12 | 12 | 2 | 1 | 8 | — | 2 | 2 | — | 4 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | E 11 | E 11 | E 11 | — | E 11 | E 11 | E 11 | E 11 | E 10 | — | — | — | — | E 16 | — | — | — | — | — | — | — |
| kJ | 2 | 2 | 2 | 9 | 2 | 9 | — | 2 | 2 | 9 | 2 | 2 | — | — | — | — | 5 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SE 3 | ESE 3 | ESE 3 | SE 4 | ESE 4 | SE 4 | — | N 3 | NNE 4 | NNE 5 | NE 6 | NE 6 | — | — | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 |
| kJ | — | — | 2 | 2 | 2 | 6 | 11 | 18 | — | 2 | 24 | 61 | 86 | 80 | — | — | 42 | 62 | 124 | 169 | 181 | 165 | 156 | 142 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 986 | 961 | 961 | 58 | 961 | 961 | 399 | 18 | 85 | 276 | 523 | 523 | 531 | 578 | 653 | 578 | 534 | 578 | 578 | 660 | 660 | 725 | 1953 | 809 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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