Surf Forecasts:
Treasure Island surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 10PM (local time) - 5ft (1.5m), 19s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 10PM (local time) - 8ft (2.4m), 18s period, SSW swell with 3,375 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 10PM (local time) - 5ft (1.5m), 19s period with SSW swell.
Best Forecast Surf Conditions for Treasure Island this week:
The surf forecast for Treasure Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 10PM. The primary swell is predicted to be 1.5m and 19s period with a secondary swell of 1.3m and 16s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Treasure Island in the next 16 days are 2.4m 18s and forecast to arrive on Wednesday (Aug 19) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 8s period and expected on Wednesday (Aug 19) at 1AM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 18th Aug) | 5ft (1.5m) 19s |
| Best Surf | 10PM (Tue 18th Aug) | 5ft (1.5m) 19s |
| Most Powerful | 10PM (Wed 19th Aug) | 8ft (2.4m) 18s |
Table - best surf conditions forecast for Treasure Island over the next 16 days.
Short Range ForecastHeavy rain (total 54mm), heaviest during Thu morning. Warm (max 29°C on Tue afternoon, min 24°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 8mm), mostly falling on Sun night. Warm (max 28°C on Fri afternoon, min 26°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | SSW 18 | SSW 20 | SSW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 18 | SSW 16 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 713 | 961 | 3367 | 2961 | 3071 | 3336 | 2702 | 2372 | 1857 | 1379 | 1193 | 1027 | 1341 | 1307 | 857 | 732 | 561 | 440 | 443 | 463 | 891 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | glassy | cross | cross-off | cross-off | off | glassy | glassy | on | off | glassy | glassy | glassy | cross | cross-on | cross-off | glassy | on | cross-off | glassy |
High Tide | 10:05PM0.63m | 9:46AM0.48m | 10:48PM0.58m | 10:07AM0.39m | 11:44PM0.53m | 10:06AM0.32m | 1:13AM0.50m | 3:03AM0.51m | 3:53PM0.28m | 4:12AM0.56m | 4:50PM0.33m | ||||||||||
Low Tide | 3:17PM0.08m | 4:00AM0.21m | 3:39PM0.10m | 4:48AM0.26m | 4:05PM0.13m | 6:16AM0.30m | 4:38PM0.17m | 5:42PM0.21m | 11:32AM0.21m | 8:22PM0.22m | 11:42AM0.17m | 9:53PM0.19m | |||||||||
 | |  | |  | |  |  |  |  | | | | | | | | | | | | |
 | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — |
 | — | 6:39 | — | — | 6:38 | — | — | 6:38 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — |
mm | 5 | 2 | 10 | 3 | — | 25 | 8 | — | 1 | — | — | 2 | — | — | 1 | — | — | 5 | 2 | — | 9 |
Temp °C | 28 | 29 | 28 | 28 | 28 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 27 | 28 | 28 |
Feels °C | 33 | 32 | 32 | 32 | 31 | 31 | 29 | 30 | 31 | 29 | 32 | 32 | 31 | 32 | 32 | 30 | 31 | 31 | 31 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 16 | SSW 16 |
| kJ | 713 | 733 | 3367 | 2961 | 3071 | 3336 | 2702 | 2372 | 1857 | 1379 | 1193 | 1027 | 1341 | 1307 | 857 | 732 | 561 | 440 | 336 | 463 | 891 |
Swell 2 Height (m) Direction Period (s) | SSW 21 | SSW 20 | WNW 8 | WNW 7 | WNW 7 | WNW 8 | WNW 7 | WSW 5 | W 8 | WNW 8 | S 20 | SSW 18 | WNW 9 | WNW 9 | WNW 8 | SSW 21 | SSW 20 | SSW 19 | SSW 18 | SSW 12 | W 8 |
| kJ | 584 | 961 | 20 | 11 | 11 | 12 | 10 | 24 | 33 | 23 | 194 | 329 | 15 | 15 | 13 | 153 | 129 | 277 | 443 | 190 | 10 |
Swell 3 Height (m) Direction Period (s) | SW 13 | WNW 8 | WNW 8 | W 20 | W 19 | W 18 | WNW 9 | — | WNW 8 | SW 6 | WNW 9 | W 8 | W 9 | WNW 9 | S 24 | WNW 8 | NW 8 | WNW 8 | WNW 8 | WNW 8 | W 8 |
| kJ | 183 | 20 | 12 | 7 | 7 | 6 | 9 | — | 14 | 9 | 28 | 22 | 7 | 16 | 43 | 13 | 18 | 13 | 20 | 21 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 41 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 117 | 0 | 0 | 0 | 0 | 0 | 9 | 0 | 0 | 0 | 0 | 9 | 9 | 0 | 0 | 9 | 0 | 0 |
Best forecast wave conditions in Banyak Islands | |||||||||||||||||||||
Best forecast wave conditions in Indonesia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Treasure 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 Treasure Island Surf forecast
The above surf forecast table for Treasure Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Treasure Island can be found by selecting the local surf guide option on the grey menu. Our Treasure 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 (Treasure 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 Treasure 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.
Are you planning a holiday in Banyak Islands? If you are looking for accommodation near Treasure Island, camping, hotels and holiday cottages in Banyak Islands, consider staying in Afia which is 86 km (53 miles) away.
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