Surf Forecasts:
Green Bay surf forecast from 2 Aug 2026:
- Best quality surf: Friday 7 Aug, 8PM (local time) - 11ft (3.5m), 15s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 9 Aug, 8PM (local time) - 20ft (6.0m), 16s period, NE swell with 18,293 kJ wave energy.
- Next surfable swell (1★+): Monday 3 Aug, 2AM (local time) - 1.5ft (0.4m), 17s 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 Monday (Aug 03) at 2AM. The primary swell is predicted to be 0.4m and 17s period with a secondary swell of 0.2m and 9s. Another secondary swell of 0.2m and 3s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Green Bay in the next 16 days are 6.0m 16s and forecast to arrive on Sunday (Aug 09) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 6s period and expected on Sunday (Aug 09) at 8AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 3rd Aug) | 1.5ft (0.4m) 17s |
| Best Surf | 8PM (Fri 7th Aug) | 11ft (3.5m) 15s |
| Most Powerful | 8PM (Sun 9th Aug) | 20ft (6.0m) 16s |
Table - best surf conditions forecast for Green Bay over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Tue morning. Warm (max 29°C on Sun afternoon, min 27°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Thu morning. Warm (max 30°C on Thu afternoon, min 28°C on Wed night). Winds increasing (calm on Wed night, strong winds from the W by Sat morning). | |||||||||||||||||||
Sun 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
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 18 | E 17 | E 16 | E 15 | E 16 | E 16 | E 17 | E 17 | E 16 | E 17 | E 18 | E 18 | ENE 18 | ENE 18 | ENE 18 | ENE 18 | ENE 15 | NE 15 | NE 15 | NE 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 26 | 91 | 172 | 165 | 317 | 526 | 861 | 975 | 1222 | 1526 | 1992 | 3418 | 4860 | 5467 | 5573 | 6317 | 6207 | 7840 | 9715 | 14113 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | off | cross-on | cross-on | cross | cross-on | on | glassy | cross-on | on | on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:46AM1.14m | 12:32PM1.00m | 1:11AM1.11m | 1:42PM1.00m | 1:38AM1.08m | 3:01PM1.01m | 2:08AM1.05m | 4:25PM1.05m | 2:47AM1.04m | 5:46PM1.12m | 3:38AM1.03m | 6:55PM1.19m | 4:44AM1.04m | |||||||
Low Tide | 5:45PM0.35m | 6:32AM0.58m | 6:25PM0.45m | 7:15AM0.50m | 7:11PM0.57m | 8:02AM0.42m | 8:05PM0.69m | 8:57AM0.33m | 9:13PM0.79m | 9:57AM0.25m | 10:39PM0.87m | 11:01AM0.17m | 00:10AM0.90m | |||||||
 |  |  | |  |  | | | | | |  | |  | | | | | | | |
 | — | — | 5:20 | — | — | 5:20 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — | — |
 | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:35 | — | — | 6:34 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | — | 4 | 1 | 3 | 2 | 1 | 4 | 2 | — | 10 |
Temp °C | 29 | 29 | 29 | 29 | 28 | 28 | 29 | 28 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 30 | 30 | 29 |
Feels °C | 31 | 32 | 33 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 34 | 32 | 33 | 34 | 31 | 32 | 32 | 28 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | E 18 | E 17 | E 16 | E 15 | E 16 | E 16 | E 17 | E 17 | E 16 | E 17 | E 18 | E 18 | ENE 18 | ENE 18 | ENE 18 | ENE 18 | ENE 15 | NE 15 | NE 15 | NE 16 |
| kJ | 26 | 91 | 172 | 165 | 317 | 526 | 861 | 975 | 1222 | 1526 | 1992 | 3418 | 4860 | 5467 | 5573 | 6317 | 6207 | 7840 | 9715 | 14113 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 8 | SSE 8 | SE 9 | SSE 8 | SE 8 | SSE 7 | NE 5 | NNE 5 | NE 7 | — | — | — | — | — | — | — | — |
| kJ | 6 | 6 | 13 | 12 | 7 | 3 | 7 | 3 | 10 | 12 | 17 | 55 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | E 12 | E 11 | SE 9 | SE 9 | E 8 | — | E 10 | — | — | — | SSE 8 | ENE 8 | — | — | — | — | — | — | — | — |
| kJ | 3 | 3 | 3 | 3 | 5 | — | 2 | — | — | — | 11 | 6 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | ESE 3 | — | ESE 2 | ESE 8 | — | ESE 8 | — | NNE 5 | — | — | — | — | N 6 | N 6 | N 7 | — | WNW 4 | WNW 4 | WNW 4 |
| kJ | — | 1 | — | 1 | 13 | — | 24 | — | 13 | — | — | — | — | 50 | 187 | 340 | — | 42 | 36 | 43 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 375 | 0 | 646 | 375 | 36 | 622 | 333 | 0 | 42 | 42 | 42 | 357 | 357 | 42 | 1035 | 229 | 229 | 229 | 232 | 229 |
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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