Surf Forecasts:
Green Bay surf forecast from 16 Sep 2026:
- Best quality surf: Saturday 19 Sep, 5AM (local time) - 2ft (0.6m), 9s period, E swell with glassy winds.
- Most powerful swell: Monday 21 Sep, 11PM (local time) - 5ft (1.6m), 12s period, NE swell with 683 kJ wave energy.
- Next surfable swell (1★+): Saturday 19 Sep, 5AM (local time) - 2ft (0.6m), 9s period with E swell.
Best Forecast Surf Conditions for Green Bay this week:
The surf forecast for Green Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 19) at 5AM. The primary swell is predicted to be 0.6m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Green Bay in the next 16 days are 1.6m 12s and forecast to arrive on Monday (Sep 21) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Sunday (Sep 20) at 11PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 19th Sep) | 2ft (0.6m) 9s |
| Best Surf | 5AM (Sat 19th Sep) | 2ft (0.6m) 9s |
| Most Powerful | 11PM (Mon 21st Sep) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Green Bay over the next 16 days.
Short Range ForecastMostly dry. Warm (max 26°C on Thu afternoon, min 24°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sun morning. Warm (max 26°C on Sat afternoon, min 24°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | ||||||||||||||
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) | NE 7 | E 10 | E 10 | E 10 | E 9 | E 9 | ENE 13 | E 9 | E 9 | E 9 | E 10 | E 15 | E 13 | E 12 | ENE 12 | ENE 12 | ENE 12 | ENE 11 | ENE 11 | ENE 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 168 | 125 | 94 | 90 | 62 | 61 | 55 | 62 | 38 | 39 | 30 | 115 | 289 | 347 | 288 | 242 | 636 | 411 | 135 | 63 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | on | on | cross-on | on | on | on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 00:24AM0.97m | 3:04PM1.08m | 00:51AM0.94m | 4:17PM1.08m | 1:28AM0.91m | 5:25PM1.08m | 2:49AM0.89m | 6:21PM1.10m | 4:18AM0.90m | 7:05PM1.12m | 5:28AM0.93m | 7:40PM1.14m | ||||||||
Low Tide | 7:10PM0.79m | 7:14AM0.32m | 8:13PM0.86m | 8:07AM0.34m | 10:09PM0.89m | 9:10AM0.36m | 00:35AM0.88m | 10:17AM0.36m | 1:05AM0.86m | 11:20AM0.35m | 1:21AM0.82m | 12:13PM0.32m | 1:35AM0.78m | |||||||
 |  | |  | | | |  | | | |  | |  | | | | | | | |
 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:39 | — | — | 5:41 | — | — | 5:41 | — | — |
 | 5:57 | — | — | 5:55 | — | — | 5:54 | — | — | 5:53 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 1 | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 24 | 25 | 27 | 27 | 27 | 26 | 26 | 29 | 28 | 27 | 29 | 27 | 27 | 26 | 25 | 25 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 6 | NE 6 | E 10 | NNE 5 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | E 9 | NNE 7 | ENE 11 | NNE 7 | NE 8 | ENE 12 | NE 8 | ENE 12 | ENE 11 | NE 7 | NE 7 |
| kJ | 168 | 120 | 52 | 90 | 31 | 51 | 82 | 107 | 99 | 39 | 142 | 97 | 160 | 226 | 288 | 219 | 636 | 411 | 86 | 53 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | NNE 6 | E 5 | E 9 | E 9 | E 9 | E 9 | ENE 12 | E 10 | E 15 | E 13 | E 12 | NNE 7 | ENE 12 | SSE 7 | SE 10 | ENE 11 | ENE 10 |
| kJ | 122 | 125 | 94 | 28 | 20 | 61 | 40 | 62 | 38 | 27 | 30 | 115 | 289 | 347 | 96 | 242 | 5 | 4 | 135 | 63 |
Swell 3 Height (m) Direction Period (s) | E 15 | E 9 | ENE 14 | ENE 6 | E 9 | E 5 | ENE 13 | ENE 12 | ENE 12 | SE 8 | ENE 11 | E 9 | ENE 12 | SE 8 | ENE 8 | S 8 | E 10 | E 10 | SE 10 | E 9 |
| kJ | 4 | 2 | 36 | 10 | 62 | 8 | 55 | 28 | 28 | 3 | 25 | 27 | 121 | 3 | 73 | 1 | 2 | 2 | 4 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NNE 6 | — | NNE 7 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 96 | — | 162 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 623 | 42 | 42 | 623 | 622 | 622 | 42 | 36 | 42 | 1035 | 42 | 377 | 612 | 42 | 1053 | 1035 | 42 | 612 | 623 | 36 |
Best forecast wave conditions in North Taiwan | ||||||||||||||||||||
Best forecast wave conditions in Taiwan | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Green Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Green Bay Surf forecast
The above surf forecast table for Green Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Green Bay can be found by selecting the local surf guide option on the grey menu. Our Green Bay 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 Bay) 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 Bay 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 Bay is 15 km (9 miles) from the city of Keelung. If you plan a holiday in North Taiwan, look for hotels and other accommodation in Keelung. Keelung has rooms for a wide range of budgets as well as car hire and transport links.
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