Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Treasure Island surfForecast / Banyak Islands / Indonesia
48hr Weather and Surf, issued 12 pm Tuesday 16 Dec 2025 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
29.3° C
(Which is slightly warmer than usual)How big are the waves at Treasure Island today?
The current surf forecast for Treasure Island at 2PM is: 0.6m 18s primary swell from a South-southwest direction and 0.7m 13s secondary swell from a Southwest direction (forecast issued at 12:00pm December 16). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (WIB) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 2ft (0.6m) | 18s |
| Afternoon (16 Dec) | 2ft (0.6m) | 18s |
| Evening (16 Dec) | 2.5ft (0.7m) | 17s |
Table - waves today at Treasure Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 18 | 18 | 18 | 18 | 16 | 12 | 16 | 12 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 211 | 211 | 209 | 204 | 278 | 287 | 339 | 273 | 376 | 362 | 477 | 471 | 471 | 523 | 503 | 489 | 685 | 482 | 476 | 476 | 469 | 390 | 318 | 309 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | cross- on | cross- on | on | cross- on | on | on | on | on | on | on | on | on | on | on | cross | cross- off | cross- off | cross- off | cross- off | glass | glass |
High Tide / height (m) | 4:23PM 0.64 | 4:27AM 0.39 | 5:00PM 0.67 | 5:12AM 0.39 | 5:36PM 0.70 | 5:50AM 0.39 | ||||||||||||||||||
Low Tide / height (m) | 11:21PM 0.19 | 9:57AM 0.13 | 11:54PM 0.14 | 10:34AM 0.10 | 12:25AM 0.11 | |||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:26 | - | - | - | - | - | - | - | 6:26 | - | - | - | - | - | - | - | 6:26 |
| Sunset | - | - | 6:24 | - | - | - | - | - | - | - | 6:25 | - | - | - | - | - | - | - | 6:25 | - | - | - | - | - |
 | |  |  | | | | | | | |  | | |  |  | |  | | | |  | | | |
Rain (mm) | 2 | 1 | - | 3 | 3 | 2 | 2 | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 26 | 27 | 27 | 26 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 27 | 28 | 28 | 28 | 28 | 27 | 27 |
| Feels °C (?) | 30 | 32 | 31 | 29 | 28 | 29 | 28 | 28 | 26 | 27 | 29 | 29 | 31 | 30 | 29 | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 31 | 31 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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