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Surf Forecasts:

Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 8 am Thursday 12 Mar 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
14.9° C
 (Which is 1.8°C colder than average for this time of year)

How big are the waves at Rock Island today?

The current surf forecast for Rock Island at 2PM is: 0.1m 16s primary swell from a South direction and 0.1m 16s secondary swell from a East direction (forecast issued at 08:00am March 12). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (12 Mar)0.5ft (0.1m)16s
Afternoon (12 Mar)0.5ft (0.1m)16s
Evening (12 Mar)0.5ft (0.1m)16s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Thursday
12
Friday
13
Saturday
14
Sun
15
6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
2
1
1
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.1
E
0.1
E
0.1
E
0.1
S
0.1
S
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.3
SE
0.4
S
0.8
SSE
1
SSE
1.2
SSE
1.1
SE
0.9
SSE
0.9
SE
Period(s) (?)16161616161616171818181818181818810101010101010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)55555556699766681133111202294243178145
Wind
(km/h)
20
NNE
15
NNE
15
NE
15
ENE
15
ENE
20
E
20
NE
25
NNE
30
NNE
30
NNE
30
NNE
25
NE
30
NE
35
NE
35
NNE
35
NNE
35
NNE
35
NNE
25
NE
20
NE
10
E
20
ESE
10
ENE
10
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffoffcross-
off		cross-
off		cross-
off		cross-
off		offoffoffoffoffoffcross-
off		offoffoffoffoffoffcross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
9:09AM
1.23
2:22AM
1.06
10:12AM
1.17
3:23AM
1.13
12:04PM
1.13
Low Tide
/ height (m)
3:24AM
0.96
5:30PM
0.25
5:05AM
1.04
6:56PM
0.24
7:45AM
1.01
8:10PM
0.21
Thursday
12
Friday
13
Saturday
14
Sun
15
Sunrise5:58-------5:56-------5:54-------
Sunset---5:45-------5:45-------5:46----
rain showers
clear
clear
clear
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
Rain (mm)
1-----------------------
Temp. °C56810119976689109987810121210109
Feels °C (?)-1124532-1-2-201200-1-2-1268565
  • 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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