Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 8 pm Wednesday 06 May 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
20.3° C
(Which is slightly warmer than usual)

How big are the waves at Rock Island today?

The current surf forecast for Rock Island at 1AM is: 0.5m 6s primary swell from a South-southeast direction and 0.1m 11s secondary swell from a Southeast direction (forecast issued at 08:00pm May 06). The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (07 May)1.5ft (0.4m)6s
Afternoon (07 May)2ft (0.6m)7s
Evening (07 May)3.5ft (1.0m)7s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 21°C on Fri morning, min 18°C on Wed night). Winds increasing (calm on Wed night, strong winds from the SW by Fri night).

Wed
6
Thursday
7
Friday
8
Saturday
9
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
Swell
Height Map
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
<span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.6
SSE
6
0.5
SSE
6
0.5
SSE
6
0.5
SSE
6
0.4
SSE
6
0.4
SSE
6
0.4
SSE
6
0.6
SSE
7
0.9
S
7
1
S
7
1
S
7
0.9
S
6
0.8
S
6
0.7
S
6
0.9
SSW
4
1.4
SSW
5
1.5
SSW
6
1.6
SSW
6
1.6
SSW
6
1.6
SSW
7
2.1
SW
7
1
SSW
8
0.8
SSW
8
0.6
SSW
8
Wave Graph
Metric surfscale
Energy kJ
26
18
18
19
13
13
16
42
77
94
92
68
49
38
25
94
126
159
225
232
470
107
67
45
Wind (km/h)
10
S
15
SSW
15
SSW
10
SSW
0
ENE
10
NNE
10
SSE
20
SSW
25
SSW
25
SSW
20
SSW
20
SW
15
SW
20
SSW
30
SSW
40
SSW
40
SW
45
SW
40
SW
15
W
5
SW
10
S
20
S
30
SSW
on
on
on
on
glassy
off
cross-on
on
on
on
on
on
on
on
on
on
on
on
on
cross-on
on
cross-on
on
on
High Tide
9:02PM1.26m
6:48AM1.34m
10:01PM1.22m
7:30AM1.26m
11:05PM1.19m
8:28AM1.17m
Low Tide
1:42AM0.97m
2:24PM0.05m
2:34AM0.99m
3:16PM0.16m
3:50AM0.99m
cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:45
4:43
4:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:30
6:31
6:32
Temp °C
18
18
18
18
18
19
20
20
20
19
19
19
19
20
21
21
21
20
20
18
18
18
18
18
19
17
18
18
19
19
20
18
17
16
17
18
18
19
18
16
15
12
13
14
16
15
13
12
Swell 1
Height (m)
Direction
Period (s)
0.6
SSE
6
0.5
SSE
6
0.5
SSE
6
0.5
SSE
6
0.4
SSE
6
0.4
SSE
6
0.4
SSE
6
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.8
S
6
0.2
ESE
11
0.3
SE
11
0.3
SE
11
0.2
ESE
11
0.2
ESE
11
0.1
SE
11
0.1
SE
11
1.4
SSW
7
1
SSW
8
0.8
SSW
8
0.3
SE
11
Energy kJ
26
18
18
19
13
13
16
4
4
4
4
4
49
11
18
18
12
12
5
5
199
107
67
18
Swell 2
Height (m)
Direction
Period (s)
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.4
ESE
10
0.5
SE
10
0.5
SE
10
0.2
ESE
11
0.5
SSE
6
0.2
ESE
8
0.2
ESE
11
0.2
ESE
11
0.3
SE
11
0.1
S
8
Energy kJ
4
5
4
4
4
4
4
42
52
53
11
21
6
11
11
18
1
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
8
0.1
SE
8
0.1
SE
9
0.1
E
9
Energy kJ
3
3
3
1
Wind waves
Height (m)
Direction
Period (s)
0.6
SSE
7
0.9
S
7
1
S
7
1
S
7
0.9
S
6
0.8
SW
6
0.7
S
6
0.9
SSW
4
1.4
SSW
5
1.5
SSW
6
1.6
SSW
6
1.6
SSW
6
1.6
SSW
7
2.1
SW
7
0.6
SSW
8
Energy kJ
34
77
94
92
68
43
38
25
94
126
159
225
232
470
45
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
3
1
2
1
Distance (km)
92
90
18
18
16
16
16
76
77
27
27
14
27
14
470
488
142
487
487
10
12
17
55
77
Best forecast wave conditions in Kanagawa
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
3
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
1
2
2
2
1
1
1
1
2
1
2
1
1
1
1
3
3
3
3
Header Global
Rating
(10 max)
5
7
7
7
9
6
5
5
7
6
5
6
6
5
7
6
5
5
5
7
6
6
5
5
  • 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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