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Rock Island surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 8 pm Saturday 29 Nov 2025 JSTForecast 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
20.5° 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 2AM is: 0.1m 11s primary swell from a Southeast direction and 0.2m 5s secondary swell from a South-southeast direction (forecast issued at 08:00pm November 29). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Nov) | 0.5ft (0.1m) | 11s |
| Afternoon (30 Nov) | 0.5ft (0.1m) | 11s |
| Evening (30 Nov) | 0.5ft (0.1m) | 11s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sat 29 | Sunday 30 | Monday 01 | Tuesday 02 | |||||||||||||||||||||
| 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 5 | 5 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 4 | 4 | 4 | 6 | 4 | 14 | 42 | 80 | 97 | 77 | 96 | 107 | 18 | 12 | 6 | 4 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | off | cross- off | off | off | glass | glass | on | glass | glass | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- off | off | off | cross- off | off | cross- on |
High Tide / height (m) | 12:11AM 1.12 | 1:00PM 1.33 | 1:47AM 1.16 | 1:36PM 1.35 | 3:02AM 1.24 | 2:11PM 1.38 | ||||||||||||||||||
Low Tide / height (m) | 6:41PM 0.78 | 6:20AM 0.64 | 7:39PM 0.62 | 7:24AM 0.74 | 8:27PM 0.46 | 8:22AM 0.82 | ||||||||||||||||||
Sat 29 | Sunday 30 | Monday 01 | Tuesday 02 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - | - | 6:31 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:29 | - | - | - | - | - | - | - | 4:29 | - | - | - | - | - | - | - | 4:29 |
 |  |  | | |  | | | | | | | | | |  | | | | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 14 | 14 | 14 | 12 | 12 | 12 | 13 | 14 | 14 | 15 | 15 | 15 | 15 | 16 | 19 | 19 | 19 | 17 | 16 | 15 | 14 | 14 | 16 | 17 |
| Feels °C (?) | 11 | 12 | 12 | 8 | 8 | 8 | 11 | 12 | 12 | 14 | 14 | 11 | 10 | 10 | 12 | 12 | 14 | 14 | 12 | 11 | 10 | 10 | 13 | 15 |
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