- Forecast
- Maps
- Live
- Weather State
- Spot Information
Nantasket Beach Surf Forecast
/ Massachusetts (29 breaks) / Massachusetts (28 breaks) /
Surf Forecasts:
Nantasket Beach surfForecast / Massachusetts / USA
48hr Weather and Surf, issued 1 pm 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 10PM is: 0.5m 7s primary swell from a East direction and 0.4m 5s secondary swell from a Northeast direction, 0.4m 3s secondary swell from a Southeast direction (forecast issued at 01:00pm 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) | 2.5ft (0.7m) | 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 | Friday 24 | |||||||||||||||||||||
| 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 | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 5 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 4 | 7 | 7 | 5 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 4 | 4 | 4 | 4 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 18 | 17 | 42 | 51 | 26 | 17 | 16 | 15 | 8 | 6 | 9 | 8 | 6 | 8 | 10 | 9 | 4 | 4 | 4 | 9 | 11 | 10 | 7 | 9 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | glass | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 3:11PM 2.85 | 3:22AM 3.21 | 4:10PM 2.73 | 4:25AM 3.06 | 5:16PM 2.64 | 5:33AM 2.92 | ||||||||||||||||||
Low Tide / height (m) | 8:55AM -0.30 | 9:07PM 0.13 | 9:53AM -0.15 | 10:07PM 0.26 | 10:56AM 0.00 | 11:13PM 0.35 | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:50 | - | - | - | - | - | - | - | 5:48 |
| Sunset | - | - | 7:30 | - | - | - | - | - | - | - | 7:31 | - | - | - | - | - | - | - | 7:32 | - | - | - | - | - |
 |  | |  |  |  | |  |  | | | |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | 1 | 1 | - | 1 | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 5 | 6 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 11 | 12 | 11 | 9 | 7 | 6 | 5 | 5 |
| Feels °C (?) | 1 | 0 | -2 | -2 | -2 | -1 | -1 | -1 | -1 | -1 | 1 | 2 | 3 | 4 | 3 | 2 | 7 | 6 | 4 | 3 | 2 | 2 | 1 | 0 |
- 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
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nantasket Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest