Rock Island Surf Break

Rock Island Surf Forecast and Surf Report

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.

Surf Forecasts:

Rock Island surf forecast from 14 Jun 2026:

  • Best quality surf: Monday 15 Jun, 9PM (local time) - 1.5ft (0.5m), 9s period, SE swell with offshore winds.
  • Most powerful swell: Sunday 21 Jun, 6PM (local time) - 5ft (1.6m), 7s period, S swell with 226 kJ wave energy.
  • Next surfable swell (1★+): Monday 15 Jun, 9PM (local time) - 1.5ft (0.5m), 9s period with SE swell.

Best Forecast Surf Conditions for Rock Island this week:

The surf forecast for Rock Island over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Jun 15) at 9PM. The primary swell is predicted to be 0.5m and 9s period with a secondary swell of 0.4m and 8s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Rock Island in the next 16 days are 1.6m 7s and forecast to arrive on Sunday (Jun 21) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Thursday (Jun 18) at 6PM.

Wave TypeTime (JST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Mon 15th Jun)1.5ft (0.5m) 9s
Best Surf 9PM (Mon 15th Jun)1.5ft (0.5m) 9s
Most Powerful 6PM (Sun 21st Jun)5ft (1.6m) 7s

Table - best surf conditions forecast for Rock Island over the next 16 days.

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

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).

Days 4-6 Weather Summary

Heavy rain (total 43mm), heaviest during Thu morning. Warm (max 23°C on Fri afternoon, min 19°C on Sat night). Wind will be generally light.

Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
0
0
0
0
0
0
1
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
Wave
Height (m)
Direction
Period (s)
0.4
SSE
5
0.4
SE
8
0.5
SE
9
0.5
SSE
8
0.3
SE
8
0.3
SSW
7
0.1
SW
7
0.1
S
18
0.1
SE
10
0.4
SE
4
0.5
SSW
8
0.8
S
8
0.6
S
7
0.5
S
6
0.2
SSE
10
0.4
S
7
0.5
SE
5
0.5
SE
5
0.2
SSE
11
1.5
S
6
1
S
7
Wave Graph
Metric surfscale
Energy kJ
10
15
41
34
10
10
2
6
4
4
35
71
35
19
10
15
11
11
12
156
89
Wind (km/h)
35
NNE
35
NNE
15
NNE
5
NE
20
SSW
20
S
15
SSW
25
S
20
SSW
20
NE
15
NNW
10
SW
10
ENE
15
SSW
10
E
15
ENE
5
ESE
15
ENE
25
NE
40
N
45
N
Wind State
off
off
off
glassy
on
on
on
on
on
off
cross-off
on
cross-off
on
cross-off
cross-off
glassy
cross-off
off
off
cross-off
High Tide
6:19PM1.39m
4:10AM1.47m
7:00PM1.41m
4:52AM1.47m
7:39PM1.41m
5:34AM1.46m
8:16PM1.39m
6:20AM1.42m
8:53PM1.37m
7:09AM1.36m
9:28PM1.35m
8:05AM1.28m
10:04PM1.33m
Low Tide
10:57AM-0.05m
11:06PM1.02m
11:37AM-0.08m
11:48PM1.02m
12:17PM-0.07m
00:30AM1.01m
12:57PM-0.03m
1:14AM0.98m
1:38PM0.05m
2:01AM0.93m
2:19PM0.17m
2:54AM0.87m
3:02PM0.31m
light rain
part cloud
clear
clear
clear
part cloud
clear
part cloud
rain showers
heavy rain
rain showers
part cloud
part cloud
part cloud
cloud
cloud
cloud
light rain
heavy rain
mod rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:26
—
—
4:26
—
—
4:26
—
—
4:26
—
—
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
—
—
6:58
—
—
6:59
—
—
6:59
—
—
6:59
—
 mm
2
—
—
—
—
—
—
—
13
40
1
—
—
—
—
—
—
2
21
10
6
Temp °C
18
18
18
20
21
20
22
22
21
20
22
22
22
23
22
22
22
20
18
18
18
Feels °C
13
13
15
19
19
18
20
20
19
19
22
23
24
24
23
23
23
19
16
13
12
Swell 1
Height (m)
Direction
Period (s)
0.4
SSE
5
0.4
SE
8
0.5
SE
9
0.5
SSE
8
0.3
SSW
7
0.3
SSW
7
0.1
SW
7
0.1
S
11
0.1
SW
7
0.4
SE
4
0.5
SSW
8
0.8
S
8
0.6
S
7
0.2
SSW
7
0.3
SSE
5
0.4
S
7
0.3
SSW
7
0.4
SE
5
0.4
SE
5
0.5
SE
5
1
S
7
Energy kJ
10
15
41
34
10
10
2
2
2
4
35
71
35
5
6
15
9
6
6
14
89
Swell 2
Height (m)
Direction
Period (s)
0.1
E
9
0.3
S
7
0.4
SSE
8
0.3
SSW
8
0.3
SE
8
0.2
SSE
7
0.1
SE
6
0.1
E
9
0.1
SE
10
0.1
SE
10
0.4
SE
6
0.2
SSE
9
0.2
SSE
10
0.2
SSW
8
0.2
SSW
7
0.2
SSE
10
0.2
SSE
10
0.2
SSE
9
0.2
SSE
9
0.4
SSW
6
0.6
SSW
8
Energy kJ
2
8
24
11
10
5
1
2
4
4
11
9
10
6
5
9
9
9
8
12
41
Swell 3
Height (m)
Direction
Period (s)
0.3
SSW
6
0.1
E
14
—
0.1
E
13
0.2
SSE
7
0.1
E
11
0.1
S
6
0.1
S
18
0.1
SE
6
0.1
SW
9
0.1
SE
10
0.1
SE
15
0.1
S
15
0.2
SSE
10
0.2
SSE
10
0.1
SE
13
0.1
SE
5
0.1
SW
7
0.2
SSE
11
0.2
SSE
11
0.2
S
15
Energy kJ
8
4
—
3
5
2
1
6
1
3
4
8
4
10
10
7
1
2
12
12
17
Wind waves
Height (m)
Direction
Period (s)
0.6
NE
3
0.6
NNE
3
0.4
NNE
3
0.2
NNE
3
—
0.2
S
3
—
0.4
S
3
0.3
S
3
—
0.6
NNE
3
0.3
N
3
—
0.5
S
6
0.2
SSE
3
0.4
SE
6
0.5
SE
5
0.5
SE
5
0.2
ENE
2
1.5
S
6
—
Energy kJ
6
9
3
1
—
1
—
2
1
—
6
2
—
19
1
9
11
11
1
156
—
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Rating
(10 max)
2
2
1
1
2
2
2
2
2
2
1
1
1
1
1
1
1
1
3
1
4
Distance (km)
228
145
0
16
77
76
76
77
76
145
0
14
64
64
38
522
249
74
843
38
145
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Rating
(10 max)
1
1
1
2
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Kyu Shu
Takegashima
Shikoku
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Shizuoka
Rating
(10 max)
2
3
4
3
2
2
3
4
2
2
3
2
1
1
1
2
2
2
3
1
4
Header Global
Papatowai
New Zealand
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Chile
Charleston
New Zealand
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Chile
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Chile
Ahijedero
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Dunedin - Cob Cottage
New Zealand
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New Zealand
Otago Peninsula - Papanui Beach
New Zealand
White Rock - The Spit
New Zealand
White Rock - The Spit
New Zealand
Easter Reef
Australia
Easter Reef
Australia
Easter Reef
Australia
Easter Reef
Australia
Ahijedero
Mexico
Saint Leu
Reunion
Papatowai
New Zealand
Rating
(10 max)
9
5
5
5
5
5
4
5
4
5
6
8
9
7
5
9
7
5
4
5
7
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Rock Island Surf forecast

The above surf forecast table for Rock Island provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rock Island can be found by selecting the local surf guide option on the grey menu. Our Rock Island surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Rock Island) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Rock Island may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Rock Island is 3 km (2 miles) from the city of Kamakura. If you plan a holiday in Kanagawa, look for hotels and other accommodation in Kamakura. Kamakura has rooms for a wide range of budgets as well as car hire and transport links.

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