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Surf Forecasts:

Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 2 pm Tuesday 17 Feb 2026 JST
Forecast update in hr  min  s Forecast update imminent
Rock Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Rock Island sea temperature is
15.9° C
 (Which is normal for this time of year)

How big are the waves at Rock Island today?

The current surf forecast for Rock Island at 7PM is: 0.1m 10s primary swell from a East direction and 0.1m 6s secondary swell from a Southeast direction (forecast issued at 02:00pm February 17). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (17 Feb)--
Afternoon (17 Feb)0.5ft (0.1m)10s
Evening (17 Feb)0.5ft (0.2m)6s

Table - waves today at Rock Island. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.1
E
0.1
E
0.1
E
0.2
E
0.2
E
0.2
E
0.3
ESE
0.1
E
0.2
ESE
0.2
ESE
0.2
ESE
0.6
SSW
0.6
SSW
0.3
SSW
0.2
SSW
0.2
SSW
0.2
SSW
0.2
E
0.1
E
0.2
E
0.1
E
0.2
E
0.1
SE
0.1
SE
Period(s) (?)10101061111108991076555512812161299
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2223109201899332453331121151133
Wind
(km/h)
20
NE
10
NE
5
ESE
5
ENE
10
NNE
10
N
15
NNE
10
NNE
5
NNE
10
ESE
10
ENE
10
NW
45
N
35
N
20
N
5
WNW
15
SW
20
SSW
20
SSW
15
SW
5
NW
20
N
20
N
20
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offcross-
off		crosscross-
off		offoffoffoffglasscrosscross-
off		cross-
off		offoffcross-
off		crossononononcross-
off		offoffoff
High Tide
/ height (m)
4:45PM
1.39
6:18AM
1.32
5:31PM
1.41
6:41AM
1.33
6:17PM
1.41
7:03AM
1.33
Low Tide
/ height (m)
11:13AM
0.72
11:37PM
0.04
11:48AM
0.61
12:12AM
0.10
12:22PM
0.50
12:45AM
0.20
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Sunrise-------6:24-------6:24-------6:22
Sunset-5:24-------5:25-------5:25------
cloud
cloud
cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
Rain (mm)
------------------------
Temp. °C67766677891010644688998655
Feels °C (?)034333335666-6-6-3232344-1-2-1
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Rock Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Rock Island at:
surf-forecast.com

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