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Surf Forecasts:
Nantasket Beach surfForecast / Massachusetts / USA
48hr Weather and Surf, issued 12 am Monday 08 Dec 2025 ESTForecast 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
7.9° C
(Which is slightly cooler than normal)How big are the waves at Nantasket Beach today?
The current surf forecast for Nantasket Beach at 2AM is: 0.5m 8s primary swell from a East direction and 0.2m 5s secondary swell from a North-northeast direction (forecast issued at 12:00am December 08). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (EST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (08 Dec) | 1.5ft (0.4m) | 8s |
| Afternoon (08 Dec) | 3ft (0.9m) | 6s |
| Evening (08 Dec) | 2.5ft (0.8m) | 6s |
Table - waves today at Nantasket Beach. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 08 | Tuesday 09 | Wednesday 10 | ||||||||||||||||||||||
| 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 8 | 8 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 8 | 8 | 8 | 9 | 8 | 8 | 15 | 8 | 8 | 8 | 4 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 35 | 34 | 34 | 22 | 22 | 59 | 54 | 48 | 37 | 45 | 21 | 8 | 6 | 6 | 6 | 6 | 6 | 6 | 4 | 1 | 1 | 1 | 17 | 40 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | cross- off | cross- off | 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 | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:15AM 2.88 | 1:25PM 3.29 | 2:10AM 2.80 | 2:21PM 3.12 | 3:07AM 2.73 | 3:20PM 2.92 | ||||||||||||||||||
Low Tide / height (m) | 7:09AM 0.04 | 7:53PM -0.29 | 8:05AM 0.15 | 8:49PM -0.13 | 9:04AM 0.26 | |||||||||||||||||||
Monday 08 | Tuesday 09 | Wednesday 10 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:58 | - | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:01 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:09 | - | - | - | - | - | - | - | 4:09 | - | - | - | - | - | - | - | 4:09 | - |
 | | |  |  | |  |  |  | | | | | | | | |  |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | 1 |
| Temp. °C | 3 | 1 | -2 | -5 | -6 | -6 | -5 | -6 | -7 | -7 | -8 | -8 | -6 | -2 | -2 | -2 | 0 | 1 | 2 | 0 | 2 | 5 | 7 | 8 |
| Feels °C (?) | -4 | -6 | -11 | -13 | -15 | -15 | -13 | -13 | -14 | -13 | -14 | -13 | -12 | -9 | -9 | -9 | -6 | -4 | -5 | -6 | -4 | 0 | 1 | 1 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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