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Santos (Hachijojima Island) surfForecast / Izu Islands / Japan
48hr Weather and Surf, issued 2 am Wednesday 20 May 2026 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
23.5° C
(Which is 1.8°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 7AM is: 1.2m 10s primary swell from a East-southeast direction and 0.4m 10s secondary swell from a Northeast direction, 0.5m 4s secondary swell from a South direction (forecast issued at 02:00am May 20). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 4ft (1.2m) | 10s |
| Afternoon (20 May) | 4ft (1.2m) | 10s |
| Evening (20 May) | 3.5ft (1.0m) | 9s |
Table - waves today at Santos (Hachijojima Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 38mm), heaviest during Thu night. Warm (max 23°C on Wed morning, min 21°C on Fri morning). Winds increasing (calm on Wed morning, near gales from the NE by Fri night). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SE 10 | ESE 10 | ESE 10 | SE 10 | ESE 10 | SE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | SSW 6 | SSW 6 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 7 | SSW 7 | S 7 | |
292 | 240 | 240 | 281 | 231 | 269 | 188 | 168 | 168 | 142 | 148 | 239 | 132 | 105 | 105 | 103 | 103 | 71 | 72 | 72 | 71 | 152 | 135 | 89 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross-off | glassy | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | |
High Tide | 6:10AM1.44m | 9:13PM1.27m | 6:53AM1.40m | 10:07PM1.20m | 7:46AM1.33m | |||||||||||||||||||
Low Tide | 00:59AM0.97m | 1:49PM-0.13m | 1:33AM1.00m | 2:42PM0.04m | 2:17AM1.02m | 3:41PM0.23m | ||||||||||||||||||
 |  |  |  |  | |  | | | | | | | | | | |  | | | | | | | |
 | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:37 | — |
— | — | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 2 | 17 | 14 | 2 | — | — | — | |
Temp °C | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 21 | 22 | 22 | 21 |
21 | 21 | 23 | 25 | 25 | 24 | 23 | 22 | 22 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 17 | 20 | 16 | 17 | 16 | 14 | |
Swell 1 Height (m) Direction Period (s) | SE 10 | ESE 10 | ESE 10 | SE 10 | ESE 10 | SE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | W 8 | WSW 8 | WSW 8 |
 kJ | 292 | 240 | 240 | 281 | 231 | 269 | 188 | 168 | 168 | 142 | 142 | 145 | 132 | 105 | 105 | 103 | 103 | 71 | 72 | 72 | 71 | 341 | 277 | 238 |
Swell 2 Height (m) Direction Period (s) | NE 9 | NE 9 | NE 10 | NE 10 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | ENE 8 | NE 8 | NE 8 | NE 11 | NE 11 | NE 11 | NE 11 | NNE 8 | SSW 7 | SSW 7 | S 7 |
| kJ | 12 | 30 | 32 | 33 | 31 | 29 | 28 | 28 | 27 | 27 | 11 | 11 | 10 | 6 | 3 | 3 | 5 | 5 | 5 | 5 | 35 | 152 | 135 | 89 |
Swell 3 Height (m) Direction Period (s) | NE 11 | S 8 | — | S 8 | S 8 | S 8 | — | — | — | — | — | — | N 12 | NE 12 | NE 12 | NE 11 | — | NE 8 | NE 8 | N 8 | NE 10 | NNE 8 | ESE 9 | ESE 9 |
| kJ | 19 | 1 | — | 1 | 1 | 1 | — | — | — | — | — | — | 3 | 6 | 6 | 5 | — | 3 | 3 | 1 | 4 | 133 | 69 | 69 |
Wind waves Height (m) Direction Period (s) | — | S 3 | S 4 | SSE 4 | SSE 4 | SSW 4 | S 4 | S 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 7 | SW 7 | SW 7 | SW 7 | SW 7 | WSW 7 | SW 7 | SW 7 | WSW 7 | W 8 | NNE 8 | NNE 8 |
| kJ | — | 8 | 7 | 8 | 10 | 12 | 18 | 47 | 75 | 98 | 148 | 239 | 431 | 541 | 623 | 612 | 582 | 528 | 463 | 463 | 471 | 482 | 359 | 678 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 196 | 196 | 0 | 0 | 0 | 0 | 196 | 196 | 196 | 196 | 196 | 307 | 307 | 253 | 239 | 228 | 152 | 233 | 480 | 480 | 506 | 494 | 495 | 546 |
Best forecast wave conditions in Izu Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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