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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 Tuesday 21 Apr 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
7.0° C
(Which is slightly warmer than usual)How big are the waves at Nantasket Beach today?
The current surf forecast for Nantasket Beach at 9AM is: 0.7m 4s primary swell from a Northeast direction and 0.6m 4s secondary swell from a Northeast direction, 0.3m 8s secondary swell from a East direction (forecast issued at 01:00am April 21). The wind direction is predicted to be cross-shore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | 2.5ft (0.7m) | 4s |
| Afternoon (21 Apr) | 2ft (0.6m) | 5s |
| Evening (21 Apr) | 2ft (0.6m) | 7s |
Table - waves today at Nantasket Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||||
| 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 | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 4 | 4 | 5 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 4 | 7 | 7 | 8 | 7 | 7 | 7 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 19 | 18 | 18 | 15 | 12 | 17 | 42 | 39 | 26 | 17 | 16 | 9 | 8 | 4 | 5 | 8 | 4 | 11 | 10 | 4 | 4 | 4 | 4 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross- on | on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross- off | off | off | off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 2:27AM 3.35 | 3:11PM 2.85 | 3:22AM 3.21 | 4:10PM 2.73 | 4:25AM 3.06 | 5:16PM 2.64 | ||||||||||||||||||
Low Tide / height (m) | 8:13PM 0.01 | 8:55AM -0.30 | 9:07PM 0.13 | 9:53AM -0.15 | 10:07PM 0.26 | 10:56AM 0.00 | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:54 | - | - | - | - | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:50 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 7:30 | - | - | - | - | - | - | - | 7:31 | - | - | - | - | - | - | - | 7:32 | - |
 |  |  |  | | | | | | | |  |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 5 | 4 | 3 | 3 | 4 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 11 | 11 | 11 | 9 |
| Feels °C (?) | -2 | -2 | -3 | -2 | 0 | -1 | -2 | -2 | -2 | -2 | -1 | -2 | -2 | -1 | 1 | 2 | 2 | 3 | 3 | 2 | 6 | 4 | 4 | 2 |
- 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
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