Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 8 pm Sunday 22 Feb 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
16.1° C
(Which is normal for this time of year)


How big are the waves at Rock Island today?

The current surf forecast for Rock Island at 5AM is: 1.6m 6s primary swell from a South-southwest direction and 0.2m 11s secondary swell from a East direction (forecast issued at 08:00pm February 22). The wind direction is predicted to be onshore.

Time (JST) & DateWave HeightWave Period
Morning (23 Feb)5ft (1.6m)7s
Afternoon (23 Feb)4.5ft (1.4m)6s
Evening (23 Feb)3ft (0.9m)6s

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

Updates in  hr  min  s Forecast update imminent
Sun
22
Monday
23
Tuesday
24
Wednesday
25
6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM
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
2
0
Swell
Height Map
Wave Height (m) & direction (?)
1.4
SSW
1.3
SSW
1.3
SSW
1.6
SSW
1.7
SSW
1.6
SSW
1.5
SSW
1.4
SSW
1.6
SSW
0.9
SSW
0.7
S
0.5
S
0.3
SSW
0.4
S
0.3
S
0.3
S
0.2
S
0.3
S
0.3
S
0.8
SSW
0.9
S
0.9
S
2
S
1.4
S
Period(s) (?)556667766666655555545667
Wave
Graph
(?)Metric surfscale
Energy kJ (?)9497981762372061871391625631156854244274048305183
Wind
(km/h)
40
SSW
35
SSW
35
SW
35
SSW
40
SSW
25
SSW
25
SSW
30
SSW
20
SSW
25
N
25
NNE
25
NNE
15
NE
10
ENE
5
ESE
20
S
25
S
20
SSW
20
SW
30
SW
25
SSW
20
SW
5
NNW
45
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onononononononononoffoffoffcross-
off
cross-
off
glassononononononcross-
on
glassoff
High Tide
/ height (m)
8:39PM
1.21
8:15AM
1.31
9:41PM
1.11
8:43AM
1.30
11:06PM
1.02
9:16AM
1.27
Low Tide
/ height (m)
2:17AM
0.59
3:05PM
0.27
2:46AM
0.74
4:01PM
0.27
3:18AM
0.87
Sun
22
Monday
23
Tuesday
24
Wednesday
25
Sunrise-----6:20-------6:18-------6:16--
Sunset-------5:30-------5:30-------5:31
clear
clear
part cloud
part cloud
light rain
rain showers
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
cloud
cloud
cloud
light rain
light rain
heavy rain
heavy rain
Rain (mm)
----11--------------121722
Temp. °C15151515151618171814121110101113141515161615139
Feels °C (?)78888121411149777899101211111212120
  • 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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