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Surf Forecasts:
Treasure Island surfForecast / Banyak Islands / Indonesia
16 Day Weather and Surf, issued 12 am Monday 18 May 2026 WIBForecast update in hr min s Forecast update imminent
Treasure Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Treasure Island sea temperature is
30.9° C
(Which is 1.2°C warmer than normal for this time of year)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 Wednesday (May 20) at 10PM. The primary swell is predicted to be 1.1m and 15s period. 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 1.1m 15s and forecast to arrive on Saturday (May 23) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (May 23) at 1AM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Wed 20th May) | 3.5ft (1.1m) 15s |
| Best Surf | 10PM (Wed 20th May) | 3.5ft (1.1m) 15s |
| Most Powerful | 7AM (Sat 23rd May) | 3.5ft (1.1m) 15s |
Table - best surf conditions forecast for Treasure Island over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 7mm), mostly falling on Tue night. Warm (max 29°C on Sun night, min 28°C on Sun night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Thu morning. Warm (max 29°C on Wed night, min 28°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 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 |  |  |  |  |  |  |  | ||||||||||||||
SW 14 | SW 20 | SW 18 | SW 18 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 16 | SW 15 | SW 14 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | |
200 | 186 | 197 | 246 | 254 | 432 | 416 | 468 | 505 | 485 | 479 | 532 | 472 | 412 | 496 | 509 | 373 | 390 | 264 | 256 | 253 | |
Wind (km/h) | |||||||||||||||||||||
cross-on | cross | cross | cross | cross-off | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross | cross | cross-off | glassy | cross-off | on | |
High Tide | 7:03AM0.87m | 7:21PM0.47m | 7:47AM0.86m | 8:07PM0.44m | 8:34AM0.82m | 8:57PM0.41m | 9:25AM0.77m | 9:55PM0.39m | 10:20AM0.70m | 11:07PM0.39m | 11:21AM0.63m | 00:33AM0.42m | 12:30PM0.57m | 1:59AM0.48m | |||||||
Low Tide | 1:44PM0.01m | 00:50AM-0.01m | 2:33PM0.03m | 1:29AM0.02m | 3:26PM0.07m | 2:12AM0.07m | 4:25PM0.12m | 3:00AM0.13m | 5:32PM0.15m | 4:03AM0.21m | 6:44PM0.17m | 5:44AM0.28m | 7:47PM0.18m | ||||||||
 |  |  | | | | | |  | | | | | |  |  | | | |  |  | |
 | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — | 6:20 | — | — |
 | — | 6:32 | — | — | 6:32 | — | — | 6:32 | — | — | 6:32 | — | — | 6:32 | — | — | 6:34 | — | — | 6:34 | — |
2 | — | 1 | — | 1 | 2 | — | — | — | 1 | — | 2 | — | — | 1 | — | 1 | 5 | 4 | 4 | 1 | |
Temp °C | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 27 | 28 |
31 | 31 | 30 | 30 | 29 | 29 | 32 | 31 | 32 | 33 | 31 | 33 | 32 | 32 | 33 | 30 | 29 | 30 | 32 | 30 | 31 | |
Swell 1 Height (m) Direction Period (s) | SW 14 | SSW 13 | SW 18 | SW 18 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 16 | SW 15 | SW 14 | SW 15 | SW 15 | SW 14 | W 8 | W 9 | W 9 | SW 13 |
 kJ | 200 | 149 | 197 | 246 | 254 | 432 | 416 | 468 | 505 | 485 | 479 | 532 | 472 | 412 | 496 | 509 | 373 | 195 | 240 | 256 | 253 |
Swell 2 Height (m) Direction Period (s) | W 8 | W 8 | SSW 13 | W 8 | S 13 | W 7 | WNW 7 | WNW 7 | WNW 7 | SW 18 | WNW 7 | WNW 7 | WNW 7 | SSW 18 | W 9 | WNW 8 | W 8 | SW 14 | SW 14 | SW 13 | WNW 9 |
| kJ | 68 | 66 | 54 | 31 | 87 | 27 | 29 | 26 | 15 | 80 | 15 | 15 | 20 | 61 | 2 | 22 | 22 | 390 | 264 | 253 | 96 |
Swell 3 Height (m) Direction Period (s) | SW 21 | SW 20 | SW 13 | S 14 | W 8 | S 12 | SSW 12 | SSW 12 | SSW 11 | WNW 7 | SSW 11 | S 11 | S 10 | S 10 | W 15 | NW 9 | NW 8 | NW 8 | NW 9 | NNW 9 | WSW 8 |
| kJ | 69 | 186 | 60 | 101 | 18 | 77 | 47 | 46 | 25 | 15 | 25 | 21 | 8 | 8 | 4 | 21 | 11 | 11 | 20 | 52 | 72 |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | WNW 8 | NNW 5 | NW 5 | NW 4 | NW 4 | — | — | — | — | — | — | NW 8 | NW 4 | NW 4 | WNW 8 | — | NNW 5 | — | — |
| kJ | 4 | 4 | 68 | 9 | 11 | 9 | 7 | — | — | — | — | — | — | 32 | 32 | 18 | 119 | — | 33 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 136 | 148 | 148 | 148 | 178 | 148 | 31 | 148 | 0 | 11 | 11 | 0 | 9 | 0 | 148 | 178 | 178 | 0 | 0 | 0 | 9 |
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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