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Keta Reef Oshima Surf Forecast
/ Izu Islands (6 surf breaks) /
Surf Forecasts:
Keta Reef Oshima surfForecast / Izu Islands / Japan
48hr Weather and Surf, issued 8 am Friday 22 May 2026 JSTForecast update in hr min s Forecast update imminent
Keta Reef Oshima surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Keta Reef Oshima sea temperature is
20.6° C
(Which is slightly cooler than normal)How big are the waves at Keta Reef Oshima today?
The current surf forecast for Keta Reef Oshima at 3PM is: 0.8m 8s primary swell from a South-southwest direction and 0.4m 10s secondary swell from a East-southeast direction (forecast issued at 08:00am May 22). An open ocean swell of 1.8m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 3.5ft (1.0m) | 8s |
| Afternoon (22 May) | 2.5ft (0.8m) | 8s |
| Evening (22 May) | 2ft (0.6m) | 8s |
Table - waves today at Keta Reef Oshima. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 8mm), mostly falling on Sat night. Warm (max 20°C on Sun afternoon, min 14°C on Fri night). Winds decreasing (near gales from the NNE on Fri afternoon, light winds from the ESE by Sun night). | ||||||||||||||||||||||||
Friday 22 | Saturday 23 | Sunday 24 | Mon 25 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 7 | SSW 7 | SSW 7 | ENE 9 | ENE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 7 | SE 7 | E 9 | SE 7 | ESE 7 | ESE 8 | |
131 | 110 | 93 | 76 | 51 | 39 | 23 | 14 | 10 | 5 | 501 | 435 | 417 | 434 | 159 | 125 | 234 | 125 | 200 | 136 | 235 | 152 | 183 | 150 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | cross-off | |
High Tide | 7:12AM1.26m | 10:35PM1.18m | 8:19AM1.13m | 11:28PM1.15m | 10:06AM1.02m | 00:13AM1.16m | ||||||||||||||||||
Low Tide | 2:56PM0.16m | 3:31AM0.94m | 3:56PM0.31m | 5:15AM0.85m | 5:02PM0.46m | |||||||||||||||||||
 | |  | | |  | | | | | | | | | |  |  | | | | | | | | |
 | 4:35 | — | — | — | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:33 |
 | — | — | — | — | 6:43 | — | — | — | — | — | — | — | 6:43 | — | — | — | — | — | — | — | 6:44 | — | — | 6:45 |
5 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 1 | 1 | 1 | 1 | — | — | — | |
Temp °C | 16 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 16 | 18 | 18 | 19 | 19 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 20 | 20 |
9 | 8 | 6 | 4 | 4 | 3 | 4 | 5 | 5 | 7 | 9 | 13 | 12 | 13 | 14 | 14 | 16 | 16 | 17 | 17 | 19 | 20 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 7 | SSW 7 | SSW 7 | S 7 | S 7 | SSW 7 | SSW 7 | E 10 | E 10 | SE 6 | E 10 | SW 6 | SE 7 | ESE 7 | SE 7 | ESE 7 | ESE 8 |
 kJ | 131 | 110 | 93 | 76 | 51 | 39 | 23 | 14 | 10 | 5 | 4 | 3 | 4 | 4 | 159 | 125 | 68 | 125 | 2 | 131 | 163 | 152 | 183 | 150 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | S 6 | SE 8 | S 8 | — | S 7 | SW 7 | SW 7 | S 6 | — | SE 12 | SE 12 | SW 7 | SW 7 | — | — | E 9 | E 9 | E 11 | ENE 9 |
| kJ | 51 | 52 | 36 | 36 | 35 | 1 | 2 | 1 | — | 4 | 2 | 2 | 3 | — | 6 | 6 | 2 | 2 | — | — | 59 | 78 | 57 | 29 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SSE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 11 | E 12 | E 16 | E 12 |
| kJ | — | — | — | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 23 | 24 | 5 | 25 |
Wind waves Height (m) Direction Period (s) | NE 4 | NNE 5 | NNE 5 | NNE 5 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 5 | ENE 9 | ENE 10 | E 10 | E 10 | ESE 6 | ESE 6 | E 10 | ESE 6 | ESE 7 | E 9 | E 9 | — | — | — |
| kJ | 47 | 61 | 104 | 193 | 276 | 309 | 268 | 242 | 205 | 186 | 501 | 435 | 417 | 434 | 103 | 93 | 234 | 106 | 200 | 136 | 235 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 453 | 87 | 107 | 470 | 107 | 107 | 453 | 516 | 761 | 843 | 53 | 516 | 516 | 843 | 55 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Izu Islands | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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