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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 1 am Wednesday 20 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
11.4° C
(Which is 1.2°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 7AM is: 0.2m 9s primary swell from a East-southeast direction and 0.1m 12s secondary swell from a East direction (forecast issued at 01:00am May 20). 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 ForecastMostly dry. Warm (max 31°C on Wed afternoon, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 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 |    |    |    | |||||||||||||||||||||
ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | NE 5 | NE 5 | NE 4 | ESE 9 | NE 4 | E 13 | E 13 | E 11 | E 11 | E 11 | E 11 | E 13 | E 10 | |
8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 10 | 11 | 10 | 8 | 4 | 3 | 3 | 3 | 3 | 3 | 2 | 4 | 2 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | on | on | cross-on | cross | cross-off | cross | cross-on | cross-on | on | on | cross-on | cross-off | cross-off | |
High Tide | 2:13AM3.39m | 2:59PM2.89m | 3:10AM3.25m | 3:59PM2.82m | 4:12AM3.08m | 5:02PM2.77m | ||||||||||||||||||
Low Tide | 8:42AM-0.32m | 8:55PM0.13m | 9:40AM-0.19m | 9:55PM0.23m | 10:41AM-0.05m | |||||||||||||||||||
 |  |  | |  | |  |  | | | | | | | | | | | | | | | | | |
 | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:01 | — | — | — | — | — | — | — | 8:02 | — | — | — | — | — | — | — | 8:04 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 21 | 21 | 24 | 30 | 31 | 29 | 25 | 22 | 18 | 15 | 13 | 13 | 12 | 13 | 12 | 12 | 11 | 11 | 11 | 14 | 16 | 17 | 14 | 13 |
21 | 21 | 23 | 28 | 29 | 26 | 23 | 20 | 15 | 10 | 10 | 10 | 9 | 9 | 9 | 10 | 7 | 7 | 8 | 11 | 11 | 11 | 9 | 9 | |
Swell 1 Height (m) Direction Period (s) | 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 5 | NE 4 | NE 4 | NE 4 | — | SE 9 | SE 9 | SE 9 | ENE 3 | — | E 10 | E 10 |
 kJ | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 11 | 10 | 7 | 4 | — | 3 | 3 | 3 | 1 | — | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | SE 4 | E 12 | E 12 | — | SE 5 | E 12 | E 12 | — | E 14 | E 14 | E 15 | E 15 | ESE 9 | ESE 9 | ESE 9 | SE 9 | SE 9 | — | E 11 | E 11 | SE 9 | E 9 | — | — |
| kJ | 1 | 3 | 3 | — | 1 | 3 | 3 | — | 4 | 4 | 4 | 4 | 8 | 8 | 8 | 3 | 3 | — | 2 | 2 | 3 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | E 12 | — | — | E 12 | E 12 | — | E 14 | E 14 | — | — | — | — | E 15 | — | — | E 11 | E 13 | E 13 | — | — | E 11 | E 11 | E 13 | — |
| kJ | 3 | — | — | 3 | 3 | — | 4 | 4 | — | — | — | — | 4 | — | — | 2 | 3 | 3 | — | — | 2 | 2 | 4 | — |
Wind waves Height (m) Direction Period (s) | SW 2 | SW 2 | SW 2 | WSW 2 | W 2 | WNW 3 | NW 3 | NW 3 | NNW 3 | N 3 | NNE 4 | NE 5 | — | — | — | — | NE 4 | NE 4 | NE 3 | NE 3 | — | — | SSE 2 | SSW 2 |
| kJ | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 2 | 2 | 3 | 10 | — | — | — | — | 3 | 2 | 1 | 1 | — | — | 1 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 55 | 72 | 333 | 336 | 108 | 108 | 110 | 108 | 90 | 98 | 117 | 117 | 117 | 276 | 531 | 276 | 276 | 181 | 890 | 890 | 834 | 818 | 805 | 108 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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