Surf Forecasts:
Green island surf forecast from 18 Oct 2026:
- Best quality surf: Wednesday 21 Oct, 11PM (local time) - 18ft (5.5m), 19s period, E swell with offshore winds.
- Most powerful swell: Friday 23 Oct, 5PM (local time) - 46ft (14.0m), 16s period, NE swell with 99,089 kJ wave energy.
- Next surfable swell (1★+): Wednesday 21 Oct, 11PM (local time) - 18ft (5.5m), 19s period with E 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 (Oct 21) at 11PM. The primary swell is predicted to be 5.5m and 19s period. 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 14.0m 16s and forecast to arrive on Friday (Oct 23) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 9.0m 13s period and expected on Friday (Oct 23) at 2PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Wed 21st Oct) | 18ft (5.5m) 19s |
| Best Surf | 11PM (Wed 21st Oct) | 18ft (5.5m) 19s |
| Most Powerful | 5PM (Fri 23rd Oct) | 46ft (14.0m) 16s |
Table - best surf conditions forecast for Green island over the next 16 days.
Short Range ForecastLight rain (total 4mm), mostly falling on Mon night. Warm (max 28°C on Mon morning, min 27°C on Sun night). Winds increasing (moderate winds from the ENE on Mon night, gales from the NNE by Wed afternoon). | Days 5-7 Weather SummaryHeavy rain (total 91mm), heaviest during Fri morning. Warm (max 27°C on Thu night, min 24°C on Thu morning). Winds decreasing (extremely windy from the NNE on Fri afternoon, light winds from the ENE by Sat afternoon). | ||||||||||||||||||
Monday 19 | Tuesday 20 | Wednesday 21 | Thursday 22 | Friday 23 | Saturday 24 | ||||||||||||||
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) | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ESE 15 | E 16 | ESE 17 | ESE 18 | E 19 | E 18 | E 17 | E 16 | E 17 | NE 16 | SSE 13 | SSW 11 | S 9 | SE 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 429 | 315 | 270 | 244 | 326 | 566 | 3371 | 5189 | 8383 | 26502 | 24006 | 19153 | 23614 | 31343 | 99089 | 38323 | 5884 | 1597 | 367 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | cross-off | on | on | cross-off | cross |
High Tide | 10:23PM1.17m | 2:11PM0.91m | 00:15AM1.13m | 2:57PM0.99m | 1:53AM1.16m | 3:25PM1.09m | 2:57AM1.23m | 3:51PM1.19m | 3:47AM1.31m | 4:16PM1.30m | 4:31AM1.37m | 4:43PM1.41m | |||||||
Low Tide | 6:36AM0.52m | 5:35PM0.87m | 7:59AM0.49m | 7:49PM0.80m | 8:52AM0.44m | 8:55PM0.67m | 9:31AM0.39m | 9:40PM0.52m | 10:04AM0.36m | 10:20PM0.37m | 10:35AM0.35m | 10:58PM0.22m | |||||||
 |  | |  | | | |  | | |  | |  |  |  | | | | | |
 | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — |
 | 5:27 | — | 5:25 | — | — | 5:24 | — | — | 5:23 | — | — | 5:23 | — | — | 5:22 | — | — | 5:22 | — |
mm | — | — | — | 3 | — | — | — | 1 | — | — | — | — | — | 32 | 24 | 28 | 5 | 2 | 13 |
Temp °C | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 26 | 24 | 25 | 27 | 27 | 27 | 27 | 26 | 27 | 27 |
Feels °C | 25 | 28 | 29 | 28 | 29 | 29 | 29 | 24 | 21 | 18 | 13 | 14 | 11 | 13 | 11 | 8 | 24 | 28 | 28 |
Swell 1 Height (m) Direction Period (s) | SE 11 | ESE 10 | ESE 10 | ESE 10 | ESE 17 | ESE 15 | E 16 | ESE 17 | ESE 18 | E 19 | E 18 | E 17 | E 16 | E 17 | — | NE 11 | ENE 10 | WSW 10 | SE 9 |
| kJ | 5 | 10 | 10 | 10 | 311 | 566 | 3371 | 5189 | 8383 | 26502 | 24006 | 19153 | 23614 | 31343 | — | 2596 | 339 | 388 | 367 |
Swell 2 Height (m) Direction Period (s) | E 15 | E 8 | E 13 | ESE 17 | ENE 8 | NE 11 | — | — | — | — | — | — | — | — | — | — | NE 10 | ENE 9 | SSW 8 |
| kJ | 4 | 1 | 4 | 55 | 28 | 18 | — | — | — | — | — | — | — | — | — | — | 200 | 280 | 193 |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 9 | E 8 |
| kJ | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | 138 | 177 |
Wind waves Height (m) Direction Period (s) | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | E 9 | NE 10 | NNE 6 | NNE 8 | NNE 10 | NNE 12 | NNE 12 | NNE 12 | NNE 13 | NE 16 | SSE 13 | SSW 11 | S 9 | — |
| kJ | 429 | 315 | 270 | 244 | 326 | 380 | 137 | 393 | 1782 | 5461 | 11445 | 13581 | 13851 | 21783 | 99089 | 38323 | 5884 | 1597 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 469 | 290 | 696 | 796 | 290 | 678 | 79 | 290 | 678 | 696 | 610 | 515 | 469 | 515 | 756 | 756 | 610 | 127 | 127 |
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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