Surf Forecasts:
Green Harbor surf forecast from 27 Aug 2026:
- Most powerful swell: Wednesday 26 Aug, 11PM (local time) - 2ft (0.6m), 9s period, E swell with 62 kJ wave energy.
Best Forecast Surf Conditions for Green Harbor this week:
The most powerful waves expected at Green Harbor in the next 16 days are 0.6m 9s and forecast to arrive on Wednesday (Aug 26) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (Aug 29) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 26th Aug) | 2ft (0.6m) 9s |
Table - best surf conditions forecast for Green Harbor over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it for Green Harbor.
Look, I’m not gonna sugarcoat it – the next week and a half is a proper drought for surf. We’re looking at at least a solid 9 days of flat, messy, or just plain weak conditions. The waves are tiny, the wind is mostly wrong, and I wouldn’t bother paddling out until we get deep into the first week of September. There’s a big gap of nothing worth mentioning from now until the 4th of September, so save your energy.
The first real pulse of energy shows up on Friday the 4th of September. The swell jumps up to 6 ft, coming from the NE with a period of 7 seconds. That’s a short period, windswell kind of wave, and the combined energy hits 341 (moderate). The issue is the wind: it’s a cross-shore, then turning cross-onshore with heavy rain. It’s also a bit dumpy and messy. The size is pushing into the territory where it’s not for beginners, but the quality isn’t there for experts either. I’d say this setup looks more interesting for kite surfing than paddle surfing.
The next window is Saturday the 5th of September. The swell is still up, around 4 ft to 5 ft from the ENE, with a period of 9 seconds. The combined energy is strong (422 in the morning). The wind is a clean cross-offshore, but here’s the catch – it’s a near gale at 37 mph. It’s blowing like crazy. The waves will be clean, but paddling out will be a full-on mission. Only for the hardcore, experienced crew.
Sunday the 6th of September has the same problem: solid 3 ft ENE swell, with a long 10-second period and strong energy (205). The wind is pure offshore, but again, it’s a near gale at 31-37 mph. It’s going to be glassy on the face, but getting out past the break is going to be brutal. Hard to paddle into.
After that, the swell starts to fade. Monday the 7th sees 3 ft dropping to 2 ft, with a fresh breeze, so it’s cleaner but getting weak. Nothing really stands out as a winner after that.
So, if I’m picking the best of what’s on offer, I’d have to say Saturday the 5th of September has the most potential if you’re an expert and don’t mind a fight with the wind. The swell is solid, the direction is clean, but you’ll be battling to get out there. For the average surfer, there’s just nothing to get excited about in this 16-day window.
Stay patient, and check back in with me.
Rusty
Short Range ForecastSome drizzle, heaviest during Fri morning. Warm (max 28°C on Fri afternoon, min 19°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Mon night. Warm (max 30°C on Sun afternoon, min 16°C on Tue morning). Winds increasing (light winds from the WNW on Sun night, fresh winds from the NNE by Tue morning). | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | E 10 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | NE 5 | ENE 4 | ESE 8 | ESE 8 | SE 9 | SE 8 | SE 9 | SE 8 | E 14 | NE 4 | E 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 46 | 41 | 41 | 41 | 24 | 26 | 13 | 12 | 11 | 22 | 7 | 7 | 7 | 3 | 3 | 3 | 3 | 4 | 16 | 3 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-on | cross-on | cross-on | cross-on | on | cross | cross-off | cross-off | on | on | on | on | cross-on | cross-off | cross-on | off | off | cross-off |
High Tide | 11:15PM2.84m | 11:43AM2.57m | 11:54PM2.89m | 12:19PM2.68m | 00:32AM2.93m | 12:55PM2.80m | 1:11AM2.94m | 1:32PM2.90m | 1:51AM2.92m | 2:11PM2.99m | 2:35AM2.88m | 2:53PM3.04m | 3:23AM2.80m | |||||||
Low Tide | 4:57PM0.46m | 5:31AM0.23m | 5:39PM0.36m | 6:08AM0.16m | 6:19PM0.26m | 6:45AM0.12m | 6:59PM0.16m | 7:21AM0.09m | 7:41PM0.08m | 8:00AM0.10m | 8:25PM0.02m | 8:42AM0.13m | 9:12PM-0.01m | |||||||
 |  | | | |  | | |  | | | | |  | | |  |  |  | | |
 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — |
 | 7:25 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:17 | — | — | 7:16 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 2 | — | — | 12 | 3 | — | 1 |
Temp °C | 23 | 22 | 25 | 27 | 23 | 26 | 28 | 24 | 19 | 20 | 22 | 27 | 30 | 25 | 24 | 23 | 21 | 20 | 16 | 17 |
Feels °C | 21 | 20 | 24 | 24 | 22 | 27 | 27 | 25 | 18 | 18 | 22 | 23 | 26 | 23 | 25 | 23 | 20 | 19 | 12 | 15 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 9 | E 9 | E 9 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 7 | NE 5 | ENE 4 | ENE 4 | ESE 8 | SE 9 | SE 8 | SE 9 | SE 8 | SE 8 | NE 4 | E 12 |
| kJ | 46 | 41 | 41 | 41 | 24 | 26 | 13 | 12 | 11 | 22 | 7 | 1 | 7 | 3 | 3 | 3 | 3 | 2 | 16 | 3 |
Swell 2 Height (m) Direction Period (s) | — | S 6 | S 10 | — | ENE 10 | NE 10 | E 10 | E 9 | E 9 | ESE 7 | ESE 8 | ESE 8 | NE 4 | E 8 | — | — | S 5 | E 14 | SE 10 | E 9 |
| kJ | — | 1 | 2 | — | 11 | 4 | 2 | 2 | 2 | 5 | 7 | 7 | 1 | 1 | — | — | 2 | 4 | 4 | 2 |
Swell 3 Height (m) Direction Period (s) | — | S 8 | — | — | E 10 | S 9 | E 10 | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | — | E 8 | — | — | E 10 | E 13 | S 12 |
| kJ | — | 1 | — | — | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | — | 1 | — | — | 2 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | S 3 | SSW 3 | S 4 | — | — | NE 4 | — | — | — | — | — | — | SW 2 | — | NNE 4 | — | ENE 5 |
| kJ | — | — | — | 5 | 2 | 7 | — | — | 20 | — | — | — | — | — | — | 1 | — | 6 | — | 21 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 959 | 6 | 6 | 1198 | 43 | 54 | 81 | 54 | 94 | 96 | 341 | 341 | 2787 | 85 | 174 | 156 | 1204 | 574 | 1204 | 85 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Green Harbor Surf forecast
The above surf forecast table for Green Harbor provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Green Harbor can be found by selecting the local surf guide option on the grey menu. Our Green Harbor surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Green Harbor) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Green Harbor may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Green Harbor is 5 km (3 miles) from Duxbury. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Duxbury. Duxbury has rooms for a wide range of budgets as well as car hire and transport links.
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