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Surf Forecasts:
Santos (Hachijojima Island) surfForecast / Izu Islands / Japan
48hr Weather and Surf, issued 2 am Thursday 18 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Santos (Hachijojima Island) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Santos (Hachijojima Island) sea temperature is
22.5° C
(Which is 1.6°C warmer than normal for this time of year)How big are the waves at Santos (Hachijojima Island) today?
The current surf forecast for Santos (Hachijojima Island) at 9AM is: 0.5m 17s primary swell from a Northeast direction and 0.4m 13s secondary swell from a Northeast direction (forecast issued at 02:00am December 18). An open ocean swell of 1.6m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 1.5ft (0.5m) | 17s |
| Afternoon (18 Dec) | 6ft (1.8m) | 6s |
| Evening (18 Dec) | 8ft (2.4m) | 8s |
Table - waves today at Santos (Hachijojima Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 18 | Friday 19 | Saturday 20 | ||||||||||||||||||||||
| 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 18 | 18 | 17 | 16 | 6 | 7 | 8 | 8 | 7 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 6 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 46 | 81 | 152 | 143 | 175 | 256 | 621 | 674 | 564 | 394 | 297 | 276 | 257 | 249 | 241 | 234 | 220 | 184 | 177 | 177 | 221 | 236 | 244 | 255 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | cross- off | cross- off | cross | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 5:18AM 1.32 | 3:24PM 1.43 | 5:56AM 1.34 | 4:00PM 1.41 | 6:30AM 1.34 | 4:35PM 1.41 | ||||||||||||||||||
Low Tide / height (m) | 10:13PM 0.26 | 10:04AM 0.99 | 10:48PM 0.15 | 10:46AM 0.97 | 11:22PM 0.07 | 11:21AM 0.93 | ||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:37 | - | - | - | - |
| Sunset | - | - | - | - | - | 4:36 | - | - | - | - | - | - | - | 4:36 | - | - | - | - | - | - | - | 4:36 | - | - |
 |  |  |  | |  | | | |  |  |  | | | | | | | | | | | | | |
Rain (mm) | 1 | 10 | - | - | - | - | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 15 | 15 | 16 | 16 | 16 | 15 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 20 | 20 | 20 |
| Feels °C (?) | 10 | 10 | 7 | 8 | 11 | 12 | 8 | 9 | 10 | 10 | 10 | 10 | 12 | 11 | 10 | 10 | 12 | 11 | 12 | 12 | 12 | 13 | 13 | 13 |
- 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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