Surf Forecast Surf Report
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Surf Forecasts

Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 2 am Tuesday 13 May 2025 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
18.2° C
 (Which is 1.9°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 5AM is: 0.3m 6s primary swell from a South-southwest direction and 0.2m 7s secondary swell from a South-southeast direction (forecast issued at 02:00am May 13). An open ocean swell of 0.1m 2s is not directed at the surf break. The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (13 May)1ft (0.3m)6s
Afternoon (13 May)1.5ft (0.4m)6s
Evening (13 May)1ft (0.3m)6s

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

Hourly12 Days
Kanagawa Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 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
0
0
0
0
0
0
0
0
0
0
0
0
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 (?)
0.5
S
0.3
SSW
0.3
SSW
0.3
SSE
0.3
SSE
0.4
S
0.3
SSE
0.3
SSE
0.3
SSE
0.3
SSE
0.3
SSE
0.2
SSE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.2
SSE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.1
SE
0.2
SSE
0.2
SSE
0.3
SE
0.2
SSE
0.2
SSE
0.2
SSE
0.2
SSE
0.3
SE
0.3
SE
0.7
SSE
0.7
SSE
0.8
S
0.7
S
0.6
S
0.6
S
1
S
0.7
S
0.9
S
1.1
S
1.3
SSW
0.9
S
0.4
SE
0.5
SE
0.6
S
0.4
SSE
0.5
S
0.6
S
0.3
SE
0.6
SSW
0.8
SSW
0.4
SE
0.5
S
Period(s) (?)666666666666101010101010510101312121211111188117788116666666666677111166661165116
Wave
Graph
(?)Metric surfscale
Energy (?)1767881177666444444444476655557720577718536445138252671315083141724257271117241825272917
Wind
(km/h)
15
NE
15
NE
10
NE
10
NE
5
ENE
15
SSW
10
S
10
SSE
10
SSW
5
SSW
5
E
5
SE
5
SSW
10
SSW
10
SSW
10
SSW
5
SSW
0
SW
0
S
5
SSW
10
S
25
SSW
25
S
25
SSW
20
SSW
15
SW
10
SW
5
SW
15
SSW
20
S
25
S
20
SSW
15
SSW
20
S
30
S
10
NW
10
S
35
SSW
30
SSW
20
SW
15
SSW
10
WSW
5
SW
15
SW
20
SSW
25
SSW
25
SSW
20
SSW
15
SW
10
SW
5
SW
15
SSW
20
SSW
20
SW
15
SSW
15
SSW
50
SSW
50
SW
45
SW
40
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		offcross-
off		cross-
off		glassoncross-
on		cross-
on		onglassglassglassglassononononglassglassoncross-
on		onononononcross-
on		glassonononononcross-
on		cross-
on		cross-
off		onononononcross-
on		cross-
on		onononononcross-
on		ononononononononononon
High Tide
/ height (m)
4:19AM
1.39
6:16PM
1.38
4:47AM
1.41
7:02PM
1.37
5:17AM
1.42
7:49PM
1.34
5:49AM
1.41
8:39PM
1.31
6:24AM
1.37
9:32PM
1.27
7:05AM
1.31
10:28PM
1.24
7:56AM
1.22
11:24PM
1.22
Low Tide
/ height (m)
10:53PM
0.75
11:16AM
-0.03
11:29PM
0.82
11:54AM
-0.08
12:04AM
0.89
12:33PM
-0.09
12:40AM
0.94
1:14PM
-0.06
1:20AM
0.98
1:58PM
0.01
2:09AM
1.01
2:46PM
0.11
3:14AM
1.00
3:40PM
0.22
4:40AM
0.95
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Sunrise--4:39-------4:39-------4:37-------4:37-------4:35-------4:35-------4:35-------4:33-
Sunset------6:36-------6:37-------6:37-------6:38-------6:38-------6:39-------6:40-----
cloudcloudcloudpart cloudclearclearclearclearclearpart cloudcloudcloudcloudcloudclearclearclearclearclearclearpart cloudcloudpart cloudcloudcloudcloudcloudcloudcloudcloudcloudcloudcloudlight rainheavy rainheavy rainmod rainpart cloudpart cloudpart cloudpart cloudcloudcloudlight raincloudcloudcloudcloudcloudpart cloudcloudlight rainlight raincloudlight rainlight rainlight rainlight rainlight raincloud
Rain (mm)
---------------------------------219146------1-------11-25241-
Temp. °C171717182020191818181818192020191818181920202019181819192020202020191917182121212121202021212121212121202021191821212122
Feels °C (?)151516171918181718191919192019191819191919171716161719191818181920181617191819202123222121202021222223201920191715151618
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>

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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