Surf Forecasts:
Green island surf forecast from 23 Aug 2026:
- Best quality surf: Saturday 29 Aug, 11PM (local time) - 7ft (2.2m), 10s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 8PM (local time) - 10ft (3.0m), 17s period, ENE swell with 5,569 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 11PM (local time) - 7ft (2.2m), 10s period with SSW 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 Saturday (Aug 29) at 11PM. The primary swell is predicted to be 2.2m and 10s period with a secondary swell of 0.7m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Green island in the next 16 days are 3.0m 17s and forecast to arrive on Tuesday (Aug 25) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.5m 9s period and expected on Friday (Aug 28) at 5PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 29th Aug) | 7ft (2.2m) 10s |
| Best Surf | 11PM (Sat 29th Aug) | 7ft (2.2m) 10s |
| Most Powerful | 8PM (Tue 25th Aug) | 10ft (3.0m) 17s |
Table - best surf conditions forecast for Green island over the next 16 days.
Short Range ForecastHeavy rain (total 298mm), heaviest during Mon morning. Warm (max 28°C on Tue morning, min 26°C on Sun morning). Winds decreasing (strong winds from the SSW on Sun afternoon, light winds from the W by Tue night). | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Warm (max 29°C on Wed afternoon, min 27°C on Fri afternoon). Winds increasing (moderate winds from the WSW on Wed morning, severe gales from the WSW by Fri morning). | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
AM | 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) | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | E 17 | E 18 | E 17 | ENE 16 | ENE 14 | ENE 13 | NE 13 | ENE 14 | ENE 13 | ENE 13 | E 13 | ENE 16 | SW 9 | SW 9 | SSW 10 | SSW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1124 | 1034 | 805 | 505 | 569 | 1502 | 4585 | 5493 | 3882 | 2169 | 1018 | 827 | 63 | 35 | 34 | 29 | 25 | 2936 | 1236 | 1071 | 788 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | glassy |
High Tide | 4:34PM0.95m | 3:05AM1.29m | 5:00PM1.02m | 3:57AM1.38m | 5:24PM1.09m | 4:39AM1.46m | 5:47PM1.16m | 5:16AM1.53m | 6:11PM1.22m | 5:52AM1.57m | 6:35PM1.28m | 6:26AM1.57m | 6:59PM1.34m | ||||||||
Low Tide | 9:44AM0.42m | 8:41PM0.82m | 10:27AM0.33m | 9:43PM0.74m | 11:01AM0.26m | 10:27PM0.64m | 11:31AM0.20m | 11:03PM0.55m | 11:59AM0.16m | 11:38PM0.45m | 12:26PM0.15m | 00:13AM0.37m | 12:53PM0.17m | 00:49AM0.31m | |||||||
 | |  | | | | |  | | |  |  |  | | | | | | | | | |
 | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:35 | — | — | 5:35 | — | — | 5:35 | — | — |
 | — | 6:19 | — | — | 6:17 | — | — | 6:16 | — | — | 6:15 | — | — | 6:15 | — | — | 6:14 | — | — | 6:14 | — |
mm | 44 | 25 | 36 | 87 | 66 | 24 | 5 | — | 11 | — | — | — | — | — | — | — | — | 4 | 4 | — | 6 |
Temp °C | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 29 | 29 |
Feels °C | 24 | 24 | 25 | 24 | 24 | 25 | 26 | 26 | 27 | 28 | 28 | 29 | 24 | 24 | 23 | 20 | 25 | 27 | 29 | 33 | 34 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 7 | ESE 8 | SE 7 | SE 7 | E 17 | E 18 | E 17 | ENE 16 | ENE 14 | ENE 13 | NE 13 | NNE 14 | NNE 13 | NNE 12 | NNE 12 | NNE 12 | NNE 9 | SSE 9 | SSW 10 | SSW 10 |
| kJ | 67 | 128 | 242 | 187 | 89 | 1502 | 4585 | 5493 | 3882 | 2169 | 1018 | 827 | 1748 | 1622 | 1390 | 1613 | 892 | 275 | 35 | 1071 | 788 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | E 14 | E 13 | ESE 14 | E 13 | SE 6 | SW 9 | SW 9 | SW 9 | SE 8 | SSE 8 | SSE 8 | ENE 14 | ENE 13 | ENE 13 | E 13 | ENE 12 | ENE 12 | NNE 7 | SSE 9 | SSE 9 |
| kJ | 10 | 16 | 14 | 69 | 92 | 26 | 460 | 380 | 365 | 18 | 13 | 6 | 63 | 35 | 34 | 29 | 15 | 29 | 11 | 46 | 99 |
Swell 3 Height (m) Direction Period (s) | E 14 | E 16 | E 16 | E 18 | E 18 | ENE 10 | N 6 | ENE 11 | NNE 8 | NNE 6 | NNE 20 | E 15 | SSE 9 | SE 8 | SE 8 | SE 9 | ENE 16 | ENE 12 | ENE 12 | ENE 13 | ENE 13 |
| kJ | 4 | 5 | 20 | 26 | 150 | 19 | 20 | 23 | 178 | 13 | 37 | 17 | 8 | 3 | 3 | 3 | 25 | 28 | 28 | 59 | 101 |
Wind waves Height (m) Direction Period (s) | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 9 | — | NNE 7 | — | SW 9 | SW 9 | WSW 6 | WSW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | SW 9 | SW 9 | — | — |
| kJ | 1124 | 1034 | 805 | 505 | 569 | 529 | — | 77 | — | 393 | 540 | 471 | 994 | 1241 | 2092 | 2305 | 2912 | 2936 | 1236 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 792 | 127 | 127 | 74 | 127 | 127 | 67 | 67 | 67 | 67 | 74 | 74 | 457 | 127 | 127 | 127 | 127 | 74 | 67 | 717 | 0 |
Best forecast wave conditions in South 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 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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