Surf Forecasts:
How big are the waves at Green Harbor today (21 Sep):
- Morning surf: Morning surf (21 Sep, local time) - 1ft (0.3m), 8s period with E swell.
- Afternoon surf: Afternoon surf (21 Sep, local time) - 0.5ft (0.2m), 8s period with E swell.
- Evening surf: Evening surf (21 Sep, local time) - 0.5ft (0.2m), 8s period with E swell.
The current surf forecast for Green Harbor at 6PM is: 0.2m 8s primary swell from a East direction and 0.1m 10s secondary swell from a East direction (forecast issued at 01:00pm September 21). An open ocean swell of 0.9m 5s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (EDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | 1ft (0.3m) | 8s |
| Afternoon (21 Sep) | 0.5ft (0.2m) | 8s |
| Evening (21 Sep) | 0.5ft (0.2m) | 8s |
Table - waves today at Green Harbor. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 16°C on Mon night, min 13°C on Tue morning). Mainly fresh winds. | |||||||||||||||||||||
Mon 21 | Tuesday 22 | Wednesday 23 | |||||||||||||||||||
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) | E 8 | E 8 | E 8 | E 8 | E 10 | E 16 | E 15 | E 15 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 11 | 5 | 5 | 5 | 7 | 5 | 4 | 4 | 257 | 288 | 261 | 222 | 170 | 167 | 195 | 298 | 432 | 526 | 585 | 662 | 645 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off |
High Tide | 8:05AM2.27m | 8:20PM2.61m | 8:59AM2.35m | 9:13PM2.67m | 9:46AM2.46m | 10:00PM2.75m | |||||||||||||||
Low Tide | 1:57PM0.69m | 2:41AM0.46m | 2:52PM0.61m | 3:30AM0.39m | 3:41PM0.50m | ||||||||||||||||
 |  | |  |  | | |  | | | | | | | | | | | |  | | |
 | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — | — | 6:30 | — | — | — | — | — | — |
 | — | — | 6:42 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:37 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 15 | 16 | 16 | 16 | 15 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 15 | 13 | 13 | 13 | 13 | 13 |
Feels °C | 9 | 11 | 11 | 13 | 13 | 11 | 9 | 8 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 8 | 5 | 6 | 6 | 7 | 7 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 10 | E 10 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | — | SE 10 | SE 10 | SSE 11 | SSE 11 | S 12 | S 12 |
| kJ | 11 | 5 | 5 | 5 | 7 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | — | 4 | 4 | 11 | 12 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 10 | E 10 | E 10 | — | E 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 2 | 2 | 2 | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | SE 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNE 4 | NE 5 | NE 5 | NE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 9 |
| kJ | 38 | 43 | 37 | 35 | 36 | 37 | 70 | 162 | 257 | 288 | 261 | 222 | 170 | 167 | 195 | 298 | 432 | 526 | 585 | 662 | 645 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 515 | 515 | 515 | 85 | 524 | 515 | 515 | 515 | 515 | 655 | 977 | 1118 | 977 | 132 | 515 | 529 | 649 | 945 | 945 | 83 | 83 |
Best forecast wave conditions in Massachusetts | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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