Surf Forecasts:
How big are the waves at Green Harbor today (18 Aug):
- Morning surf: Morning surf (18 Aug, local time) - 1.5ft (0.4m), 4s period with E swell.
- Afternoon surf: Afternoon surf (18 Aug, local time) - 0.5ft (0.2m), 9s period with ESE swell.
- Evening surf: Evening surf (18 Aug, local time) - 1ft (0.3m), 9s period with ESE swell.
The current surf forecast for Green Harbor at 9AM is: 0.4m 4s primary swell from a East direction and 0.1m 10s secondary swell from a East direction (forecast issued at 01:00am August 18). An open ocean swell of 0.5m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | 1.5ft (0.4m) | 4s |
| Afternoon (18 Aug) | 0.5ft (0.2m) | 9s |
| Evening (18 Aug) | 1ft (0.3m) | 9s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Wed morning. Warm (max 30°C on Wed afternoon, min 17°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||||||||||
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 | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | ESE 4 | ESE 4 | E 4 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 7 | E 9 | E 6 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 4 | 6 | 6 | 3 | 8 | 16 | 16 | 16 | 8 | 9 | 8 | 13 | 13 | 8 | 7 | 7 | 7 | 22 | 22 | 21 | 21 | 21 | 20 | 19 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | cross-off | cross | cross-on | on | on | on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off |
High Tide | 4:00AM2.79m | 4:21PM2.92m | 4:52AM2.61m | 5:12PM2.81m | 5:47AM2.45m | 6:06PM2.72m | ||||||||||||||||||
Low Tide | 10:03AM0.22m | 10:37PM0.18m | 10:52AM0.38m | 11:32PM0.30m | 11:44AM0.52m | |||||||||||||||||||
 |  |  | |  |  |  | | | | |  | | | | | | | | | |  |  | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:38 | — | — | — | — | — | — | — | 7:37 | — | — | — | — | — | — | — | 7:36 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 | — |
Temp °C | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 26 | 29 | 30 | 26 | 25 | 24 | 23 | 23 | 27 | 25 | 19 | 17 | 17 |
Feels °C | 21 | 21 | 20 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 23 | 27 | 29 | 29 | 25 | 25 | 24 | 23 | 23 | 27 | 25 | 18 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | ESE 4 | ESE 4 | E 4 | SE 9 | ESE 9 | ENE 4 | ENE 4 | E 4 | ENE 4 | ESE 7 | ESE 6 | E 6 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 8 |
| kJ | 4 | 6 | 6 | 3 | 8 | 5 | 5 | 3 | 3 | 9 | 8 | 13 | 13 | 8 | 7 | 7 | 7 | 22 | 22 | 21 | 21 | 21 | 20 | 19 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | S 6 | S 7 | ESE 9 | ESE 9 | ESE 9 | ESE 7 | ENE 4 | ENE 4 | E 8 | E 8 | E 8 | E 8 | SSE 4 | E 8 | S 4 | S 4 | S 6 | E 8 | E 8 | — | — |
| kJ | 2 | 2 | 2 | 3 | 4 | 16 | 16 | 16 | 4 | 2 | 2 | 6 | 5 | 5 | 6 | 2 | 5 | 1 | 1 | 1 | 5 | 12 | — | — |
Swell 3 Height (m) Direction Period (s) | S 6 | SE 9 | E 9 | S 9 | — | S 7 | S 7 | S 7 | ESE 9 | E 9 | E 9 | S 7 | — | — | E 8 | E 8 | S 4 | S 6 | S 6 | — | S 6 | S 6 | S 6 | E 15 |
| kJ | 3 | 3 | 2 | 1 | — | 4 | 4 | 4 | 8 | 6 | 6 | 4 | — | — | 1 | 5 | 3 | 3 | 2 | — | 1 | 1 | 1 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | E 4 | ENE 4 | ENE 4 | — | — | — | — | — | — | — | S 6 | S 2 | SSE 4 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 9 | 5 | 5 | — | — | — | — | — | — | — | 1 | 1 | 6 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 96 | 96 | 96 | 85 | 96 | 96 | 96 | 52 | 6 | 52 | 54 | 54 | 85 | 515 | 81 | 81 | 54 | 54 | 54 | 85 | 94 | 131 | 131 | 85 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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