Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

Rock Island surfForecast / Kanagawa / Japan

information circle48hr Weather and Surf, issued 8 pm Monday 09 Mar 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
15.1° C
 (Which is 1.5°C colder than average for this time of year)

How big are the waves at Rock Island today?

The current surf forecast for Rock Island at 11PM is: 0.1m 10s primary swell from a East direction and 0.1m 6s secondary swell from a Southwest direction (forecast issued at 08:00pm March 09). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (09 Mar)--
Afternoon (09 Mar)--
Evening (09 Mar)0.5ft (0.1m)13s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Mon
09
Tuesday
10
Wednesday
11
Thursday
12
6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 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
See all maps
Wave Height (m) & direction (?)
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.6
N
0.1
E
0.1
S
0.1
S
0.3
E
0.3
E
0.1
S
0.1
S
0.1
S
0.1
S
0.1
S
0.1
E
0.1
S
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
S
Period(s) (?)11131012123111011101069769119161616161616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)23233032417191211222555555
Wind
(km/h)
10
S
5
ESE
15
NE
30
NNE
35
N
35
N
35
N
20
NNE
15
NNE
20
ENE
15
NE
15
NNE
20
NNE
20
NNE
10
NE
5
SSE
10
SSE
10
E
15
NE
20
N
20
NNE
15
NE
10
NE
15
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crossoffoffoffoffoffoffoffcross-
off		offoffoffoffoffglasscross-
on		cross-
off		offoffoffoffcross-
off		cross
High Tide
/ height (m)
9:05PM
1.16
8:01AM
1.31
10:15PM
1.07
8:31AM
1.28
12:02AM
1.02
9:09AM
1.23
Low Tide
/ height (m)
2:15AM
0.73
3:13PM
0.20
2:45AM
0.85
4:14PM
0.22
3:24AM
0.96
Mon
09
Tuesday
10
Wednesday
11
Thursday
12
Sunrise-----6:00------5:58-------5:58---
Sunset-------5:44-------5:45-------5:45
cloud
clear
part cloud
cloud
part cloud
light rain
light rain
cloud
part cloud
cloud
cloud
part cloud
clear
part cloud
cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
Rain (mm)
-----11-----------------
Temp. °C101010642378876557888776689
Feels °C (?)676-2-4-7-513210-1-13545320135
  • 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

Latest Updates

Surf-Forecast Premium Launches 16-day Forecast and New, Improved Modelling
Ben Mondy

Surf-Forecast Premium Launches 16-day Forecast and New, Improved Modelling

Get 16% off your subscription with code 16DAYS—available for 16 days only, until March 25, 2026. Surf-Forecast Premium just got better. All paid subscribers will now see a full 16-day forecast, surf reports and wind and tide data for over 7,000 of the world's best surf spots. Premium members will also have access to a new high-resolution forecast model, which enhances our current forecasts by making them quicker and more accurate. That’s more lead time. More confidence. More chances to score g

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal
travel
Surf Forecast

Save Up to 20% on SIXT Rental Cars Worldwide – Exclusive Surf-Forecast Deal

Surf road trips just got even better. Surf-Forecast users can now save up to 20% on SIXT rental cars worldwide during the promotional period until March 31, 2026. Whether you’re planning a legendary California road trip, chasing waves along Europe’s coasts, or exploring remote surf destinations, this exclusive SIXT offer helps you travel smarter and cheaper. And if you want some inspiration on where to go, check out our article Five Iconic Surf Road Trips. Click and get your SIXT discount

Read more

Read more

Discover more articles and updates in the Greenroom.

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.

View detailed surf forecast for Rock Island at:
surf-forecast.com

Nearest locationNearest
Nearest locationNearest
Nearest locationNearest