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Surf Forecasts:
Green Harbor surfForecast / Massachusetts / USA
48hr Weather and Surf, issued 12 am Tuesday 16 Dec 2025 ESTForecast update in hr min s Forecast update imminent
Green Harbor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Green Harbor sea temperature is
7.3° C
(Which is slightly cooler than normal)How big are the waves at Green Harbor today?
The current surf forecast for Green Harbor at 6AM is: 0.2m 10s primary swell from a East direction and 0.3m 4s secondary swell from a North-northwest direction, 0.3m 3s secondary swell from a West direction (forecast issued at 12:00am December 16). The wind direction is predicted to be cross-onshore.
| Time (EST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 0.5ft (0.2m) | 10s |
| Afternoon (16 Dec) | 0.5ft (0.2m) | 11s |
| Evening (16 Dec) | 0.5ft (0.2m) | 10s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| 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) (?) | 10 | 5 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 10 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 10 | 10 | 10 | 10 | 10 | 4 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 8 | 13 | 8 | 8 | 2 | 2 | 9 | 9 | 8 | 8 | 10 | 14 | 23 | 19 | 13 | 13 | 12 | 13 | 9 | 9 | 8 | 8 | 8 | 12 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | on | on | cross- on | cross- on | cross- on |
High Tide / height (m) | 8:25PM 2.44 | 8:38AM 2.76 | 9:15PM 2.42 | 9:21AM 2.77 | 9:59PM 2.40 | 10:02AM 2.78 | ||||||||||||||||||
Low Tide / height (m) | 2:16AM 0.47 | 2:58PM 0.25 | 3:01AM 0.51 | 3:43PM 0.23 | 3:44AM 0.53 | 4:24PM 0.20 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:05 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:10 | - | - | - | - | - | - | - | 4:12 | - | - | - | - | - | - | - | 4:12 | - |
 | |  |  |  | | | | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | -5 | -4 | -4 | -4 | -3 | -1 | -1 | -2 | -2 | -1 | 0 | 2 | 5 | 7 | 6 | 3 | 5 | 3 | 1 | 1 | 1 | 4 | 4 | 6 |
| Feels °C (?) | -13 | -11 | -11 | -10 | -8 | -8 | -8 | -9 | -10 | -9 | -9 | -7 | -4 | -2 | -2 | -5 | -3 | -5 | -4 | -4 | -4 | -1 | -2 | 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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