Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 8 pm Saturday 28 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
14.6° 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 4AM is: 0.2m 8s primary swell from a East-southeast direction and 0.2m 7s secondary swell from a South-southeast direction (forecast issued at 08:00pm February 28). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (01 Mar)1ft (0.3m)8s
Afternoon (01 Mar)1.5ft (0.4m)8s
Evening (01 Mar)1.5ft (0.4m)8s

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


Updates in  hr  min  s Forecast update imminent
Sat
28
Sunday
01
Monday
02
Tuesday
03
6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM
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
Wave Height (m) & direction (?)
0.4
SE
0.3
SE
0.3
SE
0.2
ESE
0.3
SE
0.3
SE
0.3
SSE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
0.4
SE
0.2
SSE
0.2
SSE
0.2
SSE
0.2
SSE
0.3
SE
0.3
SE
0.3
SE
0.3
SE
0.2
SSE
0.3
SE
Period(s) (?)888888888888888888777887
Wave
Graph
(?)Metric surfscale
Energy kJ (?)141096101012151516161616156666988967
Wind
(km/h)
10
N
10
NNE
10
NE
10
NE
15
NE
15
NE
10
NE
10
SSE
10
S
15
S
15
SE
10
NE
30
NNE
30
NNE
20
NE
20
ENE
20
ENE
20
ENE
15
ENE
15
NE
25
NE
25
NNE
25
NNE
20
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
offoffoffcross-
off
offcross-
off
cross-
on
oncross-
on
crosscross-
off
offoffoffcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offoffoff
High Tide
/ height (m)
4:31AM
1.22
2:24PM
1.22
4:56AM
1.26
3:29PM
1.29
5:19AM
1.28
Low Tide
/ height (m)
8:55PM
0.14
9:29AM
0.92
9:46PM
0.10
10:10AM
0.80
10:29PM
0.08
10:45AM
0.68
Sat
28
Sunday
01
Monday
02
Tuesday
03
Sunrise-----6:11-------6:11-------6:09--
Sunset-------5:36-------5:37-------5:37
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
cloud
light rain
part cloud
light rain
light rain
light rain
light rain
cloud
cloud
cloud
cloud
cloud
cloud
light rain
light rain
Rain (mm)
----------1-1111------13
Temp. °C16141311910121313131312111010101010101010988
Feels °C (?)13101074581010101110545665553323
  • 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

Latest Updates

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.


Nearest locationNearest
Nearest locationNearest
Nearest locationNearest