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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 pm Monday 18 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
10.8° C
(Which is 1.0°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 5PM is: 0.2m 8s primary swell from a East-southeast direction and 0.1m 4s secondary swell from a Northeast direction, 0.4m 4s secondary swell from a East-southeast direction (forecast issued at 01:00pm May 18). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 0.5ft (0.2m) | 8s |
| Afternoon (18 May) | 0.5ft (0.2m) | 8s |
| Evening (18 May) | 1.5ft (0.5m) | 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 2mm), mostly falling on Tue night. Warm (max 34°C on Tue afternoon, min 11°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 2 AM | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
ESE 8 | ESE 8 | ESE 8 | SE 4 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 9 | S 5 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | |
6 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 7 | 9 | 9 | 15 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | |
Wind (km/h) | ||||||||||||||||||||||||
on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 1:08PM3.00m | 1:17AM3.48m | 2:03PM2.96m | 2:13AM3.39m | 2:59PM2.89m | 3:10AM3.25m | ||||||||||||||||||
Low Tide | 7:03PM-0.02m | 7:47AM-0.42m | 7:58PM0.05m | 8:42AM-0.32m | 8:55PM0.13m | |||||||||||||||||||
 | | | |  | | | | |  |  |  | | | | | | |  | | | |  | | |
 | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — |
 | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:01 | — | — | — | 8:02 |
— | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | — | — | — | — | — | |
Temp °C | 19 | 21 | 24 | 23 | 21 | 21 | 21 | 23 | 30 | 34 | 33 | 26 | 24 | 23 | 23 | 25 | 31 | 32 | 29 | 23 | 19 | 15 | 12 | 11 |
15 | 17 | 22 | 21 | 20 | 20 | 20 | 22 | 28 | 31 | 31 | 26 | 23 | 23 | 22 | 24 | 29 | 29 | 26 | 20 | 15 | 10 | 7 | 5 | |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SE 4 | SE 4 | SE 4 | ESE 9 | ESE 9 | ESE 10 | ESE 9 | 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 |
 kJ | 6 | 6 | 6 | 6 | 5 | 3 | 1 | 8 | 7 | 9 | 9 | 8 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | NE 4 | NE 4 | ESE 9 | ESE 9 | ESE 9 | SE 4 | — | SE 4 | SE 6 | E 16 | ESE 9 | SE 4 | SE 4 | E 12 | E 12 | E 12 | S 5 | SE 5 | SE 5 | E 14 | E 14 | E 15 |
| kJ | — | — | 1 | 1 | 8 | 8 | 8 | 1 | — | 1 | 1 | 5 | 8 | 1 | 1 | 3 | 3 | 3 | 1 | 1 | 1 | 4 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | E 13 | — | NE 4 | NE 4 | — | E 13 | E 13 | S 5 | E 16 | — | E 16 | E 12 | E 12 | E 12 | E 12 | — | E 12 | — | — | — | — | — |
| kJ | — | — | 4 | — | 1 | 1 | — | 3 | 3 | 1 | 5 | — | 5 | 3 | 3 | 3 | 3 | — | 3 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ENE 3 | E 3 | ESE 4 | SE 4 | SSW 2 | SW 2 | SW 2 | SW 2 | SSW 2 | SW 2 | SSW 4 | S 5 | SW 3 | SW 2 | SW 2 | SW 2 | WSW 2 | W 2 | WNW 3 | WNW 3 | NW 3 | NW 3 | N 3 | N 4 |
| kJ | 4 | 6 | 5 | 6 | 1 | 1 | 1 | 1 | 1 | 1 | 6 | 15 | 1 | 1 | 1 | 2 | 1 | 1 | 5 | 5 | 2 | 2 | 8 | 10 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 117 | 523 | 523 | 131 | 64 | 64 | 64 | 72 | 332 | 64 | 64 | 12 | 55 | 55 | 55 | 336 | 336 | 131 | 108 | 100 | 117 | 133 | 98 | 118 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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