Rock Island Surf Break

Rock Island 48 hour detailed Surf Forecast

Lat Long: 35.29° N 139.55° E

Issued: 2 am 15 Jun 2026 (local time)

Forecast update in  hr  min

Today's Rock Island sea temperature is
22.1° C

Slightly cooler than normal

Rock Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Rock Island today (15 Jun):

  • Morning surf: Morning surf (15 Jun, local time) - 1.5ft (0.4m), 5s period with SSE swell.
  • Afternoon surf: Afternoon surf (15 Jun, local time) - 1.5ft (0.4m), 8s period with SE swell.
  • Evening surf: Evening surf (15 Jun, local time) - 1.5ft (0.5m), 9s period with SE swell.

The current surf forecast for Rock Island at 6AM is: 0.5m 5s primary swell from a South direction and 0.1m 9s secondary swell from a Southeast direction (forecast issued at 02:00am June 15). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (15 Jun)1.5ft (0.4m)5s
Afternoon (15 Jun)1.5ft (0.4m)8s
Evening (15 Jun)1.5ft (0.5m)9s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 15mm), heaviest on Wed night. Warm (max 22°C on Wed morning, min 17°C on Mon morning). Winds decreasing (fresh winds from the NNE on Mon morning, calm by Tue morning).

Monday
15
Tuesday
16
Wednesday
17
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
6 PM
9 PM
Rating
(10 max)
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
S
4
0.8
SSE
5
0.5
S
5
0.4
SSE
5
0.3
S
6
0.4
SE
8
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.6
SSE
8
0.8
SSE
8
0.5
SSE
8
0.4
SE
8
0.3
SE
8
0.4
SSW
7
0.3
SSW
7
0.3
SSW
7
0.2
SSW
7
0.1
S
18
0.1
SW
7
0.2
SSW
7
0.1
S
18
0.1
S
18
0.1
S
17
Wave Graph
Metric surfscale
Energy kJ
18
27
12
10
6
15
39
41
41
46
75
34
16
10
17
10
10
5
6
2
5
6
6
6
Wind (km/h)
20
S
20
E
30
NE
35
NNE
35
NNE
35
NNE
30
NNE
25
NNE
15
NNE
10
NNE
5
NNE
5
ENE
10
S
20
SSW
20
S
20
SSW
20
S
15
S
15
SSW
15
SSW
20
S
25
S
25
S
25
SSW
Wind State
cross-on
cross-off
cross-off
off
off
off
off
off
off
off
off
glassy
on
on
on
on
on
on
on
on
on
on
on
on
High Tide
3:31AM1.44m
6:19PM1.39m
4:10AM1.47m
7:00PM1.41m
4:52AM1.47m
7:39PM1.41m
Low Tide
10:23PM1.00m
10:57AM-0.05m
11:06PM1.02m
11:37AM-0.08m
11:48PM1.02m
12:17PM-0.07m
light rain
light rain
light rain
light rain
light rain
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
cloud
part cloud
clear
clear
clear
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:26
4:26
4:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:57
6:58
6:58
 mm
1
1
2
1
1
Temp °C
21
18
17
17
18
18
18
18
18
17
17
19
20
21
21
20
20
20
20
21
22
22
22
21
Feels °C
19
16
13
12
13
13
14
15
16
16
17
20
19
19
19
18
19
19
19
20
20
20
20
19
Swell 1
Height (m)
Direction
Period (s)
0.1
SE
9
0.6
S
4
0.5
S
5
0.4
SSE
5
0.3
S
6
0.4
SE
8
0.5
SE
9
0.5
SE
9
0.5
SE
9
0.6
SSE
8
0.6
SSE
8
0.5
SSE
8
0.4
SE
8
0.3
SSW
7
0.3
SE
7
0.3
SSW
7
0.3
SSW
7
0.2
SSW
7
0.2
SSW
7
0.1
SW
7
0.2
SSW
7
0.1
S
11
0.1
S
11
0.1
SW
7
Energy kJ
3
15
12
10
6
15
39
41
41
46
44
34
16
10
8
10
10
5
5
2
5
2
2
2
Swell 2
Height (m)
Direction
Period (s)
0.2
E
8
0.1
SE
9
0.1
SE
9
0.1
E
9
0.2
ESE
6
0.3
S
7
0.3
SSE
8
0.4
SSE
8
0.4
SSE
8
0.2
ESE
10
0.8
SSE
8
0.3
SSW
8
0.3
SSW
7
0.3
SE
8
0.1
S
8
0.2
SSE
7
0.2
SSE
7
0.2
SSE
6
0.1
SE
6
0.1
SE
6
0.1
SE
6
0.1
E
9
0.1
SE
10
0.1
SE
10
Energy kJ
5
3
3
2
4
8
14
22
24
10
75
11
10
10
1
5
5
4
2
1
1
2
4
4
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
7
0.1
E
15
0.2
ESE
9
0.3
SSW
6
0.1
SE
9
0.1
E
14
0.1
E
11
0.1
S
22
0.1
S
21
0.1
E
13
0.2
SSE
7
0.1
S
20
0.1
E
11
0.1
S
6
0.1
S
18
0.1
S
6
0.1
S
11
0.1
S
18
0.1
S
18
0.1
S
17
Energy kJ
2
4
8
8
3
4
2
9
9
3
5
8
2
1
6
1
2
6
6
6
Wind waves
Height (m)
Direction
Period (s)
0.7
S
4
0.8
SSE
5
0.6
NE
3
0.7
NNE
3
0.6
NNE
3
0.6
NNE
3
0.5
NNE
3
0.4
NNE
3
0.2
NNE
3
0.2
NNE
3
0.4
SSW
7
0.3
S
3
0.2
S
3
0.4
S
3
0.4
S
3
0.3
S
3
Energy kJ
18
27
6
10
9
9
7
3
1
1
17
1
1
2
2
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
2
2
3
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
Distance (km)
572
470
470
228
228
145
145
0
0
0
0
16
16
77
55
55
76
76
76
76
77
77
77
77
Best forecast wave conditions in Kanagawa
Rating
(10 max)
2
1
1
1
1
1
Best forecast wave conditions in Japan
Rating
(10 max)
1
1
2
2
2
3
3
4
4
3
3
3
2
2
2
2
2
2
2
3
3
4
3
2
Header Global
Rating
(10 max)
5
9
9
5
5
5
5
5
5
5
5
5
5
5
5
5
4
4
4
4
5
7
7
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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