Surf-Forecast | Keta Reef Oshima Surf Guide

Lat Long: 34.74° N 139.36° E

Issued: 8 am 05 Nov 2026 (local time)

Forecast update in hr min

Today's Keta Reef Oshima sea temperature is

23.2°C

Keta Reef Oshima surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Keta Reef Oshima Surf Guide

Keta Reef Oshima in Izu Islands is a sheltered point break that has unreliable waves The best wind direction is from the east. Windswells are much more common than groundswells and the optimum wave angle is from the south southeast. Rarely crowded here. Watch out for rocks.

Keta Reef Oshima Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Point	3	inconsistent	23.2°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.

Map Icons:
Break
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
Thursday, 5 November 2026, 14:10 Local Time

m, °C	Thursday 05
ft, °F	12PM	3PM	6PM	9PM
Wave (m)	ESE	ESE	ESE	S
Period (s)	11	11	10	13
Wind (km/h)
Wind State	cross- off	cross- off	cross- off	cross

Tides at Keta Reef Oshima

Current tide and informaton

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

Next High Water: 02:14pm | 1.33m

Next Low Water: 08:37pm | 0.57m

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

Keta Reef Oshima Sea Temperature

The Keta Reef Oshima water temperature is warm (23.2 °C) and the air temperature not too different (windchill forecast 16.0 °C). A good quality summer wetsuit would be ideal though a shorty will suffice.

Today, many surfers would wear a summer wetsuit.

Current Temp*: 23.2°C*ocean temperature recorded from satellite