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Santos (Hachijojima Island) surfForecast / Izu Islands / Japan
12 Day Weather and Surf, issued 8 pm Saturday 20 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
22.3° C
(Which is 1.5°C warmer than normal for this time of year)Best Forecast Surf Conditions for Santos (Hachijojima Island) this week:
The surf forecast for Santos (Hachijojima Island) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Dec 25) at 3PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 1.3m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Santos (Hachijojima Island) in the next 12 days are 4.0m 10s and forecast to arrive on Monday (Dec 22) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Friday (Dec 26) at 9AM.
| Wave Type | Time (JST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Thu 25th Dec) | 4.5ft (1.3m) 8s |
| Best Surf | 3PM (Thu 25th Dec) | 4.5ft (1.3m) 8s |
| Most Powerful | 9PM (Mon 22nd Dec) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Santos (Hachijojima Island) over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 53mm), heaviest during Sun morning. Warm (max 21°C on Sat night, min 13°C on Mon night). Winds increasing (light winds from the WSW on Sun afternoon, near gales from the NE by Mon morning). | Days 3-6 Weather Summary Heavy rain (total 63mm), heaviest during Wed night. Warm (max 20°C on Wed afternoon, min 12°C on Fri morning). Winds increasing (light winds from the NW on Thu afternoon, near gales from the NW by Fri morning). | |||||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Sat 27 | ||||||||||||||||
| Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | ||
Rating (10 max) | ||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||
| Period(s) (?) | 7 | 7 | 8 | 9 | 9 | 8 | 10 | 9 | 9 | 8 | 7 | 7 | 7 | 11 | 8 | 8 | 14 | 13 | 9 | 10 | 9 | |
Wave (?)Graph  | ||||||||||||||||||||||
 kJ (?) | 418 | 553 | 746 | 885 | 529 | 1628 | 2694 | 1124 | 834 | 650 | 471 | 630 | 720 | 286 | 225 | 143 | 367 | 295 | 1935 | 2316 | 1083 | |
Wind (km/h) | ||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross- off | off | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross | cross- off | cross- off | off | cross- off | off | off | cross- off | cross- on | cross- on | |
High Tide / height (m) | 7:03AM 1.34 | 5:10PM 1.41 | 7:34AM 1.33 | 5:45PM 1.42 | 8:05AM 1.32 | 6:21PM 1.42 | 8:38AM 1.32 | 6:59PM 1.40 | 9:12AM 1.31 | 7:42PM 1.36 | 9:48AM 1.31 | 8:35PM 1.27 | 10:27AM 1.30 | |||||||||
Low Tide / height (m) | 11:55PM 0.03 | 11:53AM 0.91 | 12:29AM 0.03 | 12:24PM 0.89 | 1:02AM 0.06 | 12:56PM 0.89 | 1:37AM 0.12 | 1:32PM 0.89 | 2:13AM 0.20 | 2:16PM 0.89 | 2:51AM 0.30 | 3:14PM 0.88 | 3:33AM 0.42 | 4:28PM 0.81 | ||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | Friday 26 | Sat 27 | ||||||||||||||||
| Sunrise | - | 6:39 | - | - | 6:39 | - | - | 6:39 | - | - | 6:39 | - | - | 6:41 | - | - | 6:41 | - | - | 6:41 | - | |
| Sunset | - | - | 4:37 | - | - | 4:37 | - | - | 4:37 | - | - | 4:37 | - | - | 4:38 | - | - | 4:39 | - | - | 4:39 | |
 |  | |  |  |  | |  |  |  | | | |  | | |  | | | | | ||
Rain (mm) | 2 | 19 | 17 | 7 | 5 | 2 | 1 | - | - | - | - | - | 52 | 9 | - | 2 | - | - | 3 | 4 | 5 | |
| Temp. °C | 21 | 20 | 18 | 20 | 16 | 14 | 14 | 15 | 15 | 17 | 18 | 20 | 20 | 20 | 18 | 16 | 13 | 12 | 15 | 15 | 14 | |
| Feels °C (?) | 13 | 14 | 17 | 16 | 8 | 4 | 4 | 7 | 8 | 9 | 9 | 11 | 14 | 16 | 15 | 9 | 0 | 0 | 9 | 8 | 5 | |
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Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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Information about the Santos (Hachijojima Island) Surf forecast
The above surf forecast table for Santos (Hachijojima Island) provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Santos (Hachijojima Island) can be found by selecting the local surf guide option on the grey menu. Our Santos (Hachijojima 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 (Santos (Hachijojima 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 Santos (Hachijojima 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.
Santos (Hachijojima Island) is 192 km (119 miles) from Oshima. If you plan a holiday in Izu Islands, look for hotels and other accommodation in Oshima. Oshima has rooms for a wide range of budgets as well as car hire and transport links.
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