Surf Forecasts:
Green island surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 5AM (local time) - 8ft (2.5m), 15s period, ENE swell with offshore winds.
- Most powerful swell: Tuesday 25 Aug, 11AM (local time) - 8ft (2.5m), 18s period, E swell with 4,203 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 5AM (local time) - 8ft (2.5m), 15s period with ENE swell.
Best Forecast Surf Conditions for Green island this week:
The surf forecast for Green island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 26) at 5AM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 1.3m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Green island in the next 16 days are 2.5m 18s and forecast to arrive on Tuesday (Aug 25) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 6s period and expected on Thursday (Aug 27) at 11AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 26th Aug) | 8ft (2.5m) 15s |
| Best Surf | 5AM (Wed 26th Aug) | 8ft (2.5m) 15s |
| Most Powerful | 11AM (Tue 25th Aug) | 8ft (2.5m) 18s |
Table - best surf conditions forecast for Green island over the next 16 days.
Short Range ForecastHeavy rain (total 90mm), heaviest during Fri afternoon. Warm (max 28°C on Fri night, min 26°C on Sun afternoon). Winds decreasing (strong winds from the WSW on Sat afternoon, moderate winds from the W by Sun afternoon). | Days 5-7 Weather SummaryHeavy rain (total 132mm), heaviest during Tue night. Warm (max 28°C on Sun night, min 25°C on Wed morning). Winds decreasing (strong winds from the SW on Mon night, light winds from the NNW by Tue night). | ||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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) | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 9 | SW 9 | E 19 | E 17 | E 18 | E 16 | ENE 15 | ENE 14 | ENE 13 | NE 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 945 | 1347 | 1220 | 1195 | 948 | 920 | 729 | 669 | 580 | 609 | 865 | 864 | 2051 | 4203 | 3607 | 2688 | 1772 | 1002 | 778 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross | cross-off | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross-off | off | cross-off |
High Tide | 10:59PM1.24m | 1:34PM0.83m | 00:17AM1.20m | 3:55PM0.88m | 1:52AM1.22m | 4:34PM0.95m | 3:05AM1.29m | 5:00PM1.02m | 3:57AM1.38m | 5:24PM1.09m | 4:39AM1.46m | 5:47PM1.16m | |||||||
Low Tide | 6:48AM0.54m | 4:36PM0.79m | 8:36AM0.50m | 6:40PM0.85m | 9:44AM0.42m | 8:41PM0.82m | 10:27AM0.33m | 9:43PM0.74m | 11:01AM0.26m | 10:27PM0.64m | 11:31AM0.20m | 11:03PM0.55m | |||||||
 |  | |  |  |  |  | | | | | | | | | |  | |  | |
 | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — |
 | 6:21 | — | 6:20 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — |
mm | 6 | 11 | 30 | 2 | — | — | 3 | 15 | 23 | 15 | 9 | 11 | 20 | 8 | 12 | 41 | 16 | — | — |
Temp °C | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 26 | 27 | 28 |
Feels °C | 25 | 24 | 25 | 25 | 26 | 25 | 27 | 27 | 30 | 30 | 29 | 28 | 29 | 27 | 29 | 30 | 29 | 30 | 33 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SSE 8 | ESE 10 | ESE 10 | E 10 | SW 9 | NE 9 | NE 7 | SW 9 | E 19 | E 17 | E 18 | E 16 | ENE 15 | ENE 14 | ENE 13 | NE 13 |
| kJ | 33 | 34 | 16 | 11 | 10 | 11 | 17 | 669 | 21 | 17 | 609 | 864 | 2051 | 4203 | 3607 | 2688 | 1772 | 1002 | 778 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | SSE 7 | SSE 7 | ESE 10 | ESE 10 | ESE 9 | E 15 | NE 9 | SW 10 | SW 9 | SW 9 | SW 10 | SW 9 | NE 6 | SSE 8 |
| kJ | 27 | 17 | 7 | 7 | 7 | 5 | 5 | 10 | 9 | 9 | 113 | 79 | 524 | 446 | 382 | 320 | 278 | 10 | 7 |
Swell 3 Height (m) Direction Period (s) | E 15 | E 15 | ESE 10 | ESE 10 | SSE 8 | ENE 8 | ENE 9 | ENE 9 | E 15 | E 14 | NE 7 | SSE 8 | NNE 7 | NE 8 | NE 18 | SSE 8 | SSE 8 | NE 20 | E 15 |
| kJ | 4 | 5 | 10 | 10 | 6 | 7 | 8 | 8 | 17 | 15 | 23 | 7 | 142 | 142 | 51 | 14 | 7 | 136 | 17 |
Wind waves Height (m) Direction Period (s) | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | — | SW 9 | SW 9 | SW 9 | SW 9 | SW 10 | NE 8 | NE 7 | NE 7 | — | SW 10 | SW 9 |
| kJ | 945 | 1347 | 1220 | 1195 | 948 | 920 | 729 | — | 580 | 609 | 865 | 699 | 694 | 298 | 311 | 153 | — | 446 | 502 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 290 | 311 | 324 | 324 | 311 | 74 | 290 | 67 | 67 | 67 | 67 | 74 | 74 | 67 | 67 | 67 | 0 | 0 | 0 |
Best forecast wave conditions in South Taiwan | |||||||||||||||||||
Best forecast wave conditions in Taiwan | |||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Green island 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 island Surf forecast
The above surf forecast table for Green island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Green island can be found by selecting the local surf guide option on the grey menu. Our Green island 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 island) 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 island 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 island is 72 km (45 miles) from Changlotsun. If you plan a holiday in South Taiwan, look for hotels and other accommodation in Changlotsun. Changlotsun has rooms for a wide range of budgets as well as car hire and transport links.
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