Surf Forecasts:
Green island surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 11AM (local time) - 3.5ft (1.1m), 9s period, SW swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 11AM (local time) - 15ft (4.5m), 11s period, SW swell with 4,602 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 11AM (local time) - 3.5ft (1.1m), 9s period with SW 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 19) at 11AM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.5m and 10s. Another secondary swell of 1.0m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Green island in the next 16 days are 4.5m 11s and forecast to arrive on Saturday (Aug 22) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Wed 19th Aug) | 3.5ft (1.1m) 9s |
| Best Surf | 11AM (Wed 19th Aug) | 3.5ft (1.1m) 9s |
| Most Powerful | 11AM (Sat 22nd Aug) | 15ft (4.5m) 11s |
Table - best surf conditions forecast for Green island over the next 16 days.
Short Range ForecastHeavy rain (total 309mm), heaviest during Wed night. Warm (max 29°C on Tue afternoon, min 26°C on Wed night). Winds increasing (calm on Wed afternoon, strong winds from the SW by Thu night). | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Fri afternoon. Warm (max 28°C on Fri afternoon, min 28°C on Fri afternoon). Mainly strong winds. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 | SSW 9 | SW 9 | ENE 9 | SSW 10 | SSW 9 | SSW 10 | SSW 10 | SW 10 | SW 10 | SSW 11 | SW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SSW 9 | SSW 9 | SW 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 151 | 197 | 170 | 162 | 683 | 866 | 1159 | 2489 | 2354 | 2689 | 3428 | 4602 | 2554 | 1162 | 1049 | 1106 | 1080 | 846 | 802 | 585 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 9:32PM1.33m | 10:10AM1.02m | 10:10PM1.29m | 11:17AM0.89m | 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 | |||||||
Low Tide | 3:10PM0.50m | 4:09AM0.45m | 3:34PM0.61m | 5:14AM0.51m | 3:59PM0.71m | 6:48AM0.54m | 4:36PM0.79m | 8:36AM0.50m | 6:40PM0.85m | 9:44AM0.42m | 8:41PM0.82m | 10:27AM0.33m | 9:43PM0.74m | |||||||
 |  |  | |  | | | | | | | | |  | |  | | | | | |
 | — | — | 5:31 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — | 5:33 | — | — |
 | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:20 | — | — | 6:19 | — | — | 6:17 | — |
mm | 7 | 4 | 2 | 4 | 97 | 139 | 43 | 11 | 2 | 3 | 4 | 2 | 1 | — | 1 | — | 2 | — | 3 | 9 |
Temp °C | 29 | 29 | 28 | 29 | 26 | 26 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 30 | 30 | 30 | 33 | 29 | 26 | 24 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 27 | 26 | 27 | 28 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SSW 9 | SW 9 | SW 8 | SSW 10 | SSW 9 | ENE 8 | ENE 8 | SSE 9 | SSE 9 | ENE 9 | SE 8 | SSE 8 | SSE 8 | SE 8 | ESE 10 | ESE 9 | SE 8 | SW 9 | SW 10 |
| kJ | 151 | 197 | 170 | 162 | 683 | 866 | 61 | 41 | 135 | 116 | 8 | 54 | 59 | 23 | 17 | 18 | 26 | 18 | 562 | 585 |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | SE 9 | — | ENE 8 | ENE 9 | — | — | ESE 10 | ESE 10 | ESE 10 | E 13 | E 9 | ENE 9 | SE 7 | SE 7 |
| kJ | 57 | 55 | 52 | 158 | 129 | 84 | 38 | — | 14 | 8 | — | — | 20 | 19 | 19 | 3 | 14 | 8 | 116 | 69 |
Swell 3 Height (m) Direction Period (s) | ESE 10 | SSE 7 | SSE 7 | SSE 8 | SSE 9 | SE 9 | — | — | — | — | — | — | E 14 | NE 9 | NE 9 | E 16 | — | E 14 | ENE 10 | ENE 10 |
| kJ | 10 | 5 | 5 | 26 | 44 | 23 | — | — | — | — | — | — | 4 | 3 | 3 | 5 | — | 16 | 10 | 19 |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 6 | ENE 6 | — | — | — | SSW 10 | SSW 10 | SW 10 | SW 10 | SSW 11 | SW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SSW 9 | SSW 9 | — |
| kJ | 115 | 140 | 75 | — | — | — | 1159 | 2489 | 2354 | 2689 | 3428 | 4602 | 2554 | 1162 | 1049 | 1106 | 1080 | 846 | 802 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 975 | 290 | 0 | 0 | 127 | 67 | 127 | 127 | 290 | 290 | 324 | 515 | 324 | 324 | 324 | 290 | 290 | 74 | 67 | 67 |
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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