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Nantasket Beach Surf Forecast
/ Massachusetts (29 breaks) / Massachusetts (28 breaks) /
Surf Forecasts:
Nantasket Beach surfForecast / Massachusetts / USA
48hr Weather and Surf, issued 7 pm Thursday 21 May 2026 EDTForecast 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
12.5° C
(Which is 2.2°C warmer than normal for this time of year)How big are the waves at Nantasket Beach today?
The current surf forecast for Nantasket Beach at 1AM is: 0.4m 4s primary swell from a Northeast direction and 0.1m 9s secondary swell from a Southeast direction, 0.3m 4s secondary swell from a Northeast direction (forecast issued at 07:00pm May 21). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 2.5ft (0.8m) | 4s |
| Afternoon (22 May) | 2.5ft (0.7m) | 5s |
| Evening (22 May) | 1.5ft (0.4m) | 4s |
Table - waves today at Nantasket Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 8mm), mostly falling on Sun afternoon. Very mild (max 15°C on Thu night, min 8°C on Sun afternoon). Winds increasing (calm on Thu night, fresh winds from the ESE by Sun afternoon). | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NE 5 | NE 5 | NE 5 | E 13 | NE 4 | NE 4 | NE 5 | NE 5 | ENE 5 | ENE 4 | E 13 | E 14 | E 14 | E 10 | E 14 | E 10 | E 13 | E 10 | E 10 | E 12 | SE 7 | ESE 9 | ESE 9 | ESE 4 | |
16 | 13 | 8 | 3 | 12 | 23 | 33 | 25 | 15 | 7 | 4 | 4 | 4 | 2 | 4 | 2 | 3 | 2 | 2 | 4 | 9 | 8 | 8 | 10 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | glassy | glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross | cross-off | glassy | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | |
High Tide | 3:59PM2.82m | 4:12AM3.08m | 5:02PM2.77m | 5:18AM2.93m | 6:05PM2.76m | 6:23AM2.81m | ||||||||||||||||||
Low Tide | 9:55PM0.23m | 10:41AM-0.05m | 11:01PM0.30m | 11:43AM0.07m | 00:08AM0.34m | 12:43PM0.17m | ||||||||||||||||||
 | |  |  | |  |  | | | | | | | | | | | | | | | |  | | |
 | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — |
 | — | 8:02 | — | — | — | — | — | — | — | 8:04 | — | — | — | — | — | — | — | 8:05 | — | — | — | — | — | 8:06 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | |
Temp °C | 16 | 15 | 15 | 12 | 10 | 11 | 11 | 11 | 12 | 12 | 13 | 12 | 12 | 12 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 9 | 8 |
13 | 13 | 12 | 6 | 4 | 5 | 6 | 6 | 8 | 7 | 9 | 8 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 9 | 8 | 7 | 5 | 3 | |
Swell 1 Height (m) Direction Period (s) | NE 5 | NE 5 | NE 5 | NE 4 | SE 9 | E 9 | E 9 | NE 5 | ENE 5 | ENE 4 | ENE 4 | ENE 4 | E 4 | NE 4 | E 10 | E 10 | E 10 | E 10 | E 10 | SE 10 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
 kJ | 16 | 13 | 8 | 3 | 3 | 2 | 2 | 25 | 15 | 7 | 3 | 3 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 4 | 9 | 8 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | ESE 9 | SE 9 | SE 9 | E 13 | E 11 | E 11 | E 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 14 | — | — | — | SE 5 | E 12 | E 12 | E 12 | — | E 12 |
| kJ | 8 | 8 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | — | — | — | 1 | 3 | 3 | 3 | — | 3 |
Swell 3 Height (m) Direction Period (s) | E 15 | E 14 | E 11 | E 13 | — | — | — | E 11 | E 11 | E 13 | E 13 | E 14 | E 14 | — | — | — | E 13 | — | — | — | — | S 9 | — | E 18 |
| kJ | 4 | 4 | 2 | 3 | — | — | — | 2 | 2 | 3 | 4 | 4 | 4 | — | — | — | 3 | — | — | — | — | 1 | — | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 4 | NE 4 | NE 5 | — | — | — | — | — | — | ENE 4 | E 4 | — | — | — | — | — | SE 7 | ESE 2 | SE 3 | ESE 4 |
| kJ | — | — | — | — | 12 | 23 | 33 | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 7 | 1 | 3 | 10 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 263 | 228 | 171 | 282 | 655 | 813 | 805 | 871 | 871 | 884 | 871 | 784 | 753 | 742 | 725 | 1230 | 1230 | 725 | 725 | 725 | 508 | 508 | 403 | 399 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Surf Rating (10 Max)
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