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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 Tuesday 19 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
10.9° C
(Which is slightly warmer than usual)How big are the waves at Nantasket Beach today?
The current surf forecast for Nantasket Beach at 12AM is: 0.2m 9s primary swell from a East-southeast direction and 0.1m 4s secondary swell from a Southeast direction (forecast issued at 07:00pm May 19). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 0.5ft (0.2m) | 9s |
| Afternoon (20 May) | 0.5ft (0.2m) | 9s |
| Evening (20 May) | 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
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 30°C on Wed morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Tue 19 | Wednesday 20 | Thursday 21 | Fri 22 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | NE 4 | E 13 | NE 4 | E 11 | E 11 | E 11 | |
8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 4 | 3 | 3 | 3 | 3 | 3 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | cross | on | on | cross-on | cross | off | cross-on | cross-on | cross | on | cross-on | |
High Tide | 2:03PM2.96m | 2:13AM3.39m | 2:59PM2.89m | 3:10AM3.25m | 3:59PM2.82m | 4:12AM3.08m | ||||||||||||||||||
Low Tide | 7:58PM0.05m | 8:42AM-0.32m | 8:55PM0.13m | 9:40AM-0.19m | 9:55PM0.23m | 10:41AM-0.05m | ||||||||||||||||||
 |  |  | | | | |  | |  |  | | | | | | | | | | | | | | |
 | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — |
 | — | 8:00 | — | — | — | — | — | — | — | 8:01 | — | — | — | — | — | — | — | 8:02 | — | — | — | — | — | 8:04 |
— | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 30 | 26 | 23 | 22 | 21 | 24 | 30 | 30 | 29 | 24 | 21 | 18 | 16 | 14 | 13 | 12 | 13 | 13 | 13 | 12 | 11 | 12 | 14 | 16 |
28 | 27 | 24 | 23 | 21 | 24 | 28 | 28 | 26 | 21 | 19 | 16 | 12 | 10 | 9 | 9 | 9 | 11 | 11 | 7 | 7 | 9 | 11 | 11 | |
Swell 1 Height (m) Direction Period (s) | ESE 9 | SSE 4 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | NE 4 | NE 4 | ENE 4 | NE 4 | — | SE 9 | E 3 | ENE 3 | ENE 3 |
 kJ | 8 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 4 | — | 3 | 1 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | E 13 | ESE 9 | SSE 4 | SE 4 | E 12 | SE 5 | SE 5 | — | E 12 | SE 5 | — | E 14 | E 14 | — | E 15 | ESE 9 | ESE 9 | ESE 9 | SE 9 | SE 9 | E 13 | SE 9 | SE 9 | SE 9 |
| kJ | 3 | 8 | 1 | 1 | 3 | 1 | 1 | — | 3 | 1 | — | 4 | 4 | — | 4 | 8 | 8 | 8 | 3 | 3 | 3 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | E 16 | E 16 | — | E 12 | — | — | E 12 | E 12 | E 12 | E 12 | — | — | — | E 15 | — | E 15 | — | E 14 | E 11 | E 13 | — | E 11 | E 11 | E 11 |
| kJ | 5 | 5 | — | 3 | — | — | 3 | 3 | 3 | 3 | — | — | — | 4 | — | 4 | — | 4 | 2 | 3 | — | 2 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | S 3 | WSW 2 | SW 2 | SSW 2 | — | SW 2 | WSW 2 | WNW 2 | NW 3 | WNW 3 | NW 3 | NW 3 | NNW 3 | NNE 3 | NE 4 | — | — | — | — | NE 4 | NE 4 | NNE 3 | NE 3 | — |
| kJ | 8 | 1 | 1 | 1 | — | 1 | 1 | 1 | 5 | 4 | 2 | 2 | 2 | 2 | 5 | — | — | — | — | 3 | 3 | 1 | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 55 | 55 | 55 | 55 | 58 | 336 | 336 | 336 | 108 | 93 | 87 | 98 | 113 | 117 | 117 | 117 | 531 | 531 | 298 | 276 | 662 | 878 | 890 | 844 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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