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 Wednesday 11 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
14.9° C
 (Which is 1.8°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 9s primary swell from a South direction (forecast issued at 08:00pm March 11). The wind direction is predicted to be cross-offshore.

Time (JST) & DateWave HeightWave Period
Morning (11 Mar)--
Afternoon (11 Mar)--
Evening (11 Mar)0.5ft (0.1m)9s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Wed
11
Thursday
12
Friday
13
Saturday
14
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
S
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
S
0.1
S
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
E
0.1
SE
0.1
E
0.2
S
0.5
SSE
Period(s) (?)-910161616161616161617181818181818181814181010
Wave
Graph
(?)Metric surfscale
Energy kJ (?)0225555555566967666686855
Wind
(km/h)
10
SSE
15
E
15
NE
15
NNE
20
NNE
15
NNE
20
NNE
15
NE
15
ENE
20
E
20
NE
25
NNE
30
NNE
30
NNE
30
NNE
30
NE
25
NE
35
NE
40
NNE
35
NNE
35
NNE
35
NNE
25
NE
20
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
off		cross-
off		offoffoffoffcross-
off		cross-
off		cross-
off		cross-
off		offoffoffoffoffoffoffoffoffoffoffoffcross-
off
High Tide
/ height (m)
12:02AM
1.02
9:09AM
1.23
2:22AM
1.06
10:12AM
1.17
3:23AM
1.13
12:04PM
1.13
Low Tide
/ height (m)
4:14PM
0.22
3:24AM
0.96
5:30PM
0.25
5:05AM
1.04
6:56PM
0.24
7:45AM
1.01
Wed
11
Thursday
12
Friday
13
Saturday
14
Sunrise----5:58-------5:56-------5:54---
Sunset-------5:45-------5:45-------5:46
cloud
cloud
light rain
light rain
clear
clear
clear
clear
cloud
part cloud
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
cloud
clear
clear
clear
Rain (mm)
--11--------------------
Temp. °C97665681011108766799987771011
Feels °C (?)5321-1124542-1-3-2-1110-2-2-2-324
  • 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