Rock Island Surf Break

Lat Long: 35.29° N 139.55° E

Rock Island 48 hour detailed Surf Forecast

Issued: 2 am 23 Jul 2026 (local time)

Forecast update in  hr  min

Today's Rock Island sea temperature is
27.1° C
1.2° 

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 (23 Jul):

  • Morning surf: Morning surf (23 Jul, local time) - 1.5ft (0.4m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (23 Jul, local time) - 1.5ft (0.4m), 6s period with SSW swell.
  • Evening surf: Evening surf (23 Jul, local time) - 0.5ft (0.2m), 10s period with SSE swell.

The current surf forecast for Rock Island at 5AM is: 0.9m 6s primary swell from a Southwest direction and 0.5m 5s secondary swell from a South direction, 0.2m 6s secondary swell from a South-southwest direction (forecast issued at 02:00am July 23). The wind direction is predicted to be offshore.

Time (JST) & DateWave HeightWave Period
Morning (23 Jul)1.5ft (0.4m)6s
Afternoon (23 Jul)1.5ft (0.4m)6s
Evening (23 Jul)0.5ft (0.2m)10s

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


Short Range Forecast

Moderate rain (total 10mm), heaviest on Sat night. Warm (max 32°C on Thu morning, min 25°C on Fri night). Wind will be generally light.

Thursday
23
Friday
24
Saturday
25
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
0
0
0
0
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)
0.6
SSW
5
0.9
SW
6
0.4
SSW
5
0.4
SSW
6
0.4
SSW
6
0.4
SSW
6
0.2
SSE
10
0.2
SSE
10
0.2
SSE
10
0.2
SSE
10
0.2
SSE
9
0.2
SSE
9
0.2
SSE
9
0.2
SSE
9
0.3
SE
11
0.3
SE
11
0.3
SE
11
0.2
SSE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
0.3
SE
10
Wave Graph
Metric surfscale
Energy kJ
17
46
8
15
12
12
10
10
12
12
12
12
12
11
18
18
18
10
15
15
15
15
15
15
Wind (km/h)
15
SW
5
WNW
15
NNE
10
ENE
5
E
20
S
15
S
5
ESE
10
ENE
15
ENE
10
ENE
5
E
10
SSW
20
SSW
15
S
15
SSE
10
S
5
ESE
15
NE
15
NNE
5
ENE
15
S
10
SSW
15
E
Wind State
on
cross
off
cross-off
glassy
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
on
on
cross-on
cross-on
cross-on
glassy
cross-off
off
cross-off
on
on
cross-off
High Tide
10:05PM1.39m
11:48AM1.12m
10:43PM1.38m
1:49PM1.13m
11:30PM1.38m
3:34PM1.21m
Low Tide
5:11AM0.52m
4:29PM0.91m
6:22AM0.44m
5:30PM1.04m
7:33AM0.35m
7:05PM1.13m
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:43
4:43
4:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:51
 mm
1
2
Temp °C
28
29
28
30
32
30
30
29
28
27
27
27
28
28
28
27
27
27
25
25
27
28
27
27
Feels °C
31
33
31
33
36
32
33
34
31
29
30
31
31
30
31
30
31
33
27
27
31
31
31
30
  • 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
How to use the Wavefinder 

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.


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