Keta Reef Oshima Surf Forecast and Surf Reports

(Izu Islands, Japan)

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- Hourly Forecast
- 16 Day Forecast
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Keta Reef Oshima Surf Guide

Keta Reef Oshima in Izu Islands is a sheltered point break that does not work very often Offshore winds are from the east. Usually gets local windswells, but groundswells do happen and the best wave direction is from the south southeast. Even when there are waves, it's not likley to be crowded. Take care of rocks in the line up.

Keta Reef Oshima Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Point	3	inconsistent	19.2°C*ocean temperature recorded from satellite

Surfing Keta Reef Oshima:

The best conditions reported for surf at Keta Reef Oshima occur when a South-southeast swell combines with an offshore wind direction from the East.

Hourly Forecast

16 Day Forecast

What's the best time of year to surf Keta Reef Oshima (for consistent clean waves)?

augustBest Season: summer

The best time of year for surfing Keta Reef Oshima with consistent clean waves (rideable swell with light / offshore winds) is during Summer and most often the month of August. Clean surfable waves are typically found 5% of the time in August while 3% of the time it tends to be blown out. For the remaining 92% of the time it is considered too small by most surfers but may still be OK for beginners and groms at times.

clean

Surfable waves that hold up well for longer rides in prevailing cross-offshore, offshore or light wind conditions.

blown out

Surfable sized waves that are of poorer quality due to prevailing onshore, cross-onshore or windy conditions (may be preferable for kitesurfing).

too small

92%

Waves usually considered too small for good surf. Some wave-magnet breaks may still work though if conditions are right (on occasion).

Explore Keta Reef Oshima Location Map

Interactive Keta Reef Oshima surf break location map. View information about nearby surf breaks, their wave consistency and rating compared to other spots in the region. Current swell conditions from local buoys are shown along with live wind speed and direction from nearby weather stations. Click icons on the map for more detail. The closest passenger airport to Keta Reef Oshima is Oshima Airport (OIM) in Japan, 5 km (3 miles) away (directly). The second nearest airport to Keta Reef Oshima is Miyakejima Airport (MMY), also in Japan, 77 km (48 miles) away.

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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Please note that some surf spot locations are approximate to protect their exact location while others are not shown at close zoom level.

Keta Reef Oshima Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Friday, 8 May 2026, 03:32 Local Time

m, °C	Friday 08
ft, °F	0AM	3AM	6AM	9AM
Wave (m)	S	S	ESE	ESE
Period (s)	6	6	10	10
Wind (km/h)
Wind State	cross- on	cross- on	cross- on	cross- on

Tides at Keta Reef Oshima

Current tide and informaton

For Okada (O Sima), Tokyo, Japan, 6 km from Keta Reef Oshima.

Next High Water: 06:49am | 1.19m

Next Low Water: 02:37pm | 0.24m

NEXT	IS AT (local time)	remaining
high tide
low tide

Keta Reef Oshima Sea Temperature

Cloudy and warm but the water temperature at Keta Reef Oshima will be noticeably colder than the air today. Most surfers will need a spring wetsuit. Feeling warmer out of the water than in the sea today.

Today, many surfers would wear a spring wetsuit.

Current Temp*: 19.2°C*ocean temperature recorded from satellite