Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 2 pm Thursday 07 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 8PM is: 0.4m 10s primary swell from a East-southeast direction and 0.1m 11s secondary swell from a Southeast direction, 0.7m 6s secondary swell from a South direction (forecast issued at 02:00pm May 07). The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (07 May)--
Afternoon (07 May)1.5ft (0.4m)10s
Evening (07 May)2.5ft (0.7m)6s

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 16°C on Sat night). Winds decreasing (strong winds from the SW on Fri night, calm by Sun morning).

Thu
7
Friday
8
Saturday
9
Sun
10
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
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
2
1
1
1
0
0
0
0
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><span class="translation_missing" title="translation missing: en.components.forecast-table.maps.snow_map">Snow Map</span>
Wave
Height (m)
Direction
Period (s)
0.4
ESE
10
0.4
SE
10
0.7
S
6
0.7
S
6
0.9
S
6
0.9
S
6
0.8
S
6
0.8
S
6
1.1
S
6
1.4
SSW
6
1.6
SSW
6
1.7
SSW
6
1.5
S
7
2
SW
7
1.7
SW
7
0.8
SSW
7
0.6
SSW
8
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.3
SE
10
0.3
SE
10
Wave Graph
Metric surfscale
Energy kJ
43
28
42
36
61
65
50
48
92
122
186
253
218
407
309
62
49
18
18
18
18
18
17
16
Wind (km/h)
20
S
25
S
20
SSW
25
SW
20
SW
15
SW
15
SW
20
SSW
30
SSW
40
SSW
40
SSW
45
SW
35
SW
5
W
15
SE
15
ENE
15
NNE
10
SW
20
SSW
10
SE
15
ENE
15
NE
20
NE
15
NNE
on
cross-on
on
on
on
on
on
on
on
on
on
on
on
cross-on
cross
cross-off
off
on
on
cross
cross-off
cross-off
off
off
High Tide
10:01PM1.22m
7:30AM1.26m
11:05PM1.19m
8:28AM1.17m
00:05AM1.19m
Low Tide
2:24PM0.05m
2:34AM0.99m
3:16PM0.16m
3:50AM0.99m
4:16PM0.27m
5:29AM0.93m
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
cloud
cloud
part cloud
clear
clear
clear
cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:43
4:43
4:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:30
6:31
6:32
6:34
Temp °C
19
19
19
20
20
19
19
20
21
21
21
20
20
18
18
18
20
20
18
18
18
17
16
17
17
17
18
18
19
18
18
19
18
16
16
12
13
16
14
14
15
17
14
15
15
12
10
12
Swell 1
Height (m)
Direction
Period (s)
0.1
SE
11
0.1
SE
11
0.1
SE
11
0.2
ESE
11
0.2
ESE
11
0.9
S
6
0.8
S
6
0.2
ESE
11
0.2
ESE
11
0.2
ESE
11
0.2
ESE
11
0.1
SE
11
0.1
SE
11
1.4
SSW
7
1.2
SSW
8
0.8
SSW
7
0.6
SSW
8
0.4
SSW
7
0.3
SE
11
0.3
SE
11
0.3
SSW
6
0.3
SE
11
0.3
SE
10
0.3
SE
10
Energy kJ
4
4
4
11
11
65
50
11
11
11
12
5
5
208
151
62
49
16
18
18
8
18
17
16
Swell 2
Height (m)
Direction
Period (s)
0.4
ESE
10
0.4
SE
10
0.4
ESE
10
0.2
ESE
11
0.2
ESE
11
0.1
SE
11
0.1
SE
11
0.2
ESE
11
0.3
SE
11
0.3
SE
11
0.2
S
7
0.3
SSW
6
0.3
SE
11
0.3
SSW
6
0.2
S
6
0.1
S
6
Energy kJ
43
28
42
11
11
5
5
11
18
18
4
8
18
7
3
1
Swell 3
Height (m)
Direction
Period (s)
0.2
SSW
8
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
S
7
0.1
S
6
Energy kJ
6
2
2
2
1
1
Wind waves
Height (m)
Direction
Period (s)
0.5
SSE
6
0.9
S
4
0.7
S
6
0.7
S
6
0.9
S
6
0.8
S
6
1.1
S
6
1.4
SSW
6
1.6
SSW
6
1.7
SSW
6
1.5
S
7
2
SW
7
1.7
SW
7
0.5
S
3
0.3
SSW
3
Energy kJ
22
23
36
36
61
48
92
122
186
253
218
407
309
5
2
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
2
1
1
1
1
2
2
1
1
1
1
1
1
1
1
1
Distance (km)
77
77
491
38
14
12
38
92
505
505
487
487
487
3
17
0
0
38
77
51
122
51
74
51
Best forecast wave conditions in Kanagawa
Rating
(10 max)
1
1
1
1
3
2
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
1
1
1
1
1
2
2
2
2
1
1
3
3
3
4
2
1
2
1
1
2
1
Header Global
Rating
(10 max)
5
5
8
5
5
6
7
7
7
8
6
5
5
9
9
5
5
5
5
5
8
5
4
4
  • 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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