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Surf Forecasts:

Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 2 am Monday 19 Jan 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
14.7° C
 (Which is 2.6°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 4AM is: 0.2m 5s primary swell from a East-southeast direction and 0.1m 7s secondary swell from a Southeast direction (forecast issued at 02:00am January 19). 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 (19 Jan)0.5ft (0.1m)7s
Afternoon (19 Jan)0.5ft (0.1m)7s
Evening (19 Jan)2ft (0.6m)4s

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
19
Tuesday
20
Wednesday
21
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
1
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
0.1
E
0.1
E
0.1
SE
0.1
E
0.6
SW
0.9
SW
1.6
SW
1.5
SW
0.6
SSW
0.4
SW
0.1
SE
0.2
SSW
0.2
S
0.1
SE
0.1
SE
0.2
SSE
0.2
SSE
0.3
SE
0.4
SE
0.4
SE
0.4
SE
Period(s) (?)111111111171145666511661110101010111010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2222222143814814322754444101017292826
Wind
(km/h)
15
ENE
20
NNE
20
NNE
15
NNE
10
N
10
S
15
SW
15
W
30
WSW
25
W
20
NNE
35
NNE
30
NNE
30
NNE
30
NNE
30
NNE
25
NNE
25
NNE
30
NNE
25
NNE
15
NE
10
ESE
10
SSE
10
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offoffoffcross-
off		ononcross-
on		cross-
on		cross-
on		offoffoffoffoffoffoffoffoffoffoffcrosscross-
on		cross
High Tide
/ height (m)
6:32AM
1.36
4:40PM
1.42
7:00AM
1.37
5:28PM
1.43
7:27AM
1.36
6:15PM
1.41
Low Tide
/ height (m)
11:15PM
-0.06
11:30AM
0.92
11:55PM
-0.06
12:08PM
0.84
12:32AM
-0.01
12:47PM
0.76
Monday
19
Tuesday
20
Wednesday
21
Sunrise---6:48-------6:48-------6:48----
Sunset-----4:54-------4:55-------4:57--
light rain
cloud
cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
cloud
part cloud
cloud
cloud
cloud
cloud
cloud
part cloud
clear
cloud
rain showers
Rain (mm)
1----------------------1
Temp. °C998891113131312108785431223446
Feels °C (?)54336899664-1-1-1-4-5-5-7-7-7-3-102
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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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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