Rock Island Surf Break
Lat Long: 35.29° N 139.55° E

Surf & Wind Alerts for Rock Island

Weather Forecast for Rock Island

Issued: 8 am 09 Jun 2026 (local time)

Forecast update in  hr  min

Today's Rock Island sea temperature is
21.4° C

1.0°C colder than average for this time of year

Rock Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

(please check carefully)

Wave height
Wave period
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Wind Speed and Direction surfing

Specify the maximum allowed forecast average wind speeds in km/h, coming from 16 different directions. We have pre-filled the lists with values suggested by Rock Island orientation and wind sheltering. Your local knowledge and preferences may be different.

Max. wind speed in km/h:

N
40
NNE
50
NE
40
ENE
30
E
20
ESE
15
SE
25
SSE
15
S
5
SSW
5
SW
5
WSW
5
W
5
WNW
5
NW
20
NNW
30
Tide state

Tide state for Rock Island is approximated by data from Sinzyuku Wan (Zusi) which is 2 km away.

Daylight
:
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Measurement units

These units will be used in emails.

Format

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