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Surf Forecasts:

Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 2 am Monday 16 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
16.7° 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 10AM is: 0.2m 12s primary swell from a East direction and 0.3m 5s secondary swell from a South-southwest direction, 0.1m 10s secondary swell from a Southeast direction (forecast issued at 02:00am February 16). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (16 Feb)0.5ft (0.2m)12s
Afternoon (16 Feb)0.5ft (0.2m)6s
Evening (16 Feb)0.5ft (0.2m)7s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Monday
16
Tuesday
17
Wednesday
18
0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM
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 (?)
1.2
SW
0.6
SSW
0.5
SSW
0.2
E
0.2
E
0.2
SSE
0.2
SSE
0.2
SSE
0.2
S
0.2
SSE
0.1
SE
0.1
E
0.1
E
0.1
E
0.1
E
0.2
E
0.2
E
0.2
E
0.2
E
0.2
E
0.1
SE
0.2
E
0.2
ESE
0.4
SW
Period(s) (?)666121266766810101010111111111161188
Wave
Graph
(?)Metric surfscale
Energy kJ (?)9525181212444343222291099919615
Wind
(km/h)
10
WNW
10
NNE
20
NNE
35
N
25
NE
25
ENE
20
E
25
NE
35
NE
30
NNE
25
NNE
20
NE
15
NE
10
NE
5
ESE
5
NE
10
N
15
NNE
15
N
15
NNE
5
NNW
5
NE
5
NE
20
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossoffoffoffoffcross-
off		cross-
off		cross-
off		offoffoffoffoffoffcrosscross-
off		offoffoffoffglassglassoffcross-
off
High Tide
/ height (m)
5:30AM
1.29
3:54PM
1.34
5:54AM
1.31
4:45PM
1.39
6:18AM
1.32
5:31PM
1.41
Low Tide
/ height (m)
10:19PM
0.03
10:37AM
0.84
10:59PM
0.02
11:13AM
0.72
11:37PM
0.04
11:48AM
0.61
Monday
16
Tuesday
17
Wednesday
18
Sunrise---6:28-------6:26-------6:24----
Sunset-----5:23-------5:24-------5:25--
clear
clear
clear
clear
cloud
cloud
cloud
light rain
light rain
light rain
light rain
cloud
part cloud
cloud
cloud
cloud
light rain
light rain
cloud
cloud
part cloud
clear
clear
clear
Rain (mm)
-------2331-----11------
Temp. °C14131111111098534356755666891010
Feels °C (?)1210535442-3-4-3-3-124212225774
  • 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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