Surf Forecasts:
How big are the waves at Rock Island today (05 Jul):
- Morning surf: Morning surf (05 Jul, local time) - 1.5ft (0.4m), 4s period with SSE swell.
- Afternoon surf: Afternoon surf (05 Jul, local time) - 2ft (0.6m), 5s period with SSE swell.
- Evening surf: Evening surf (05 Jul, local time) - 4ft (1.2m), 6s period with SE swell.
The current surf forecast for Rock Island at 4AM is: 0.1m 11s primary swell from a Southeast direction and 0.1m 10s secondary swell from a Southeast direction, 0.4m 4s secondary swell from a South direction (forecast issued at 08:00pm July 04). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (05 Jul) | 1.5ft (0.4m) | 4s |
| Afternoon (05 Jul) | 2ft (0.6m) | 5s |
| Evening (05 Jul) | 4ft (1.2m) | 6s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 33mm), heaviest during Mon afternoon. Warm (max 24°C on Sun morning, min 20°C on Mon night). Winds increasing (light winds from the SSE on Sat night, fresh winds from the N by Tue morning). | ||||||||||||||||||||||||
Sat 4 | Sunday 5 | Monday 6 | Tuesday 7 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SSE 3 | E 8 | E 8 | S 4 | S 4 | SSE 4 | SSE 4 | SSE 5 | SE 6 | SE 6 | SE 6 | SSE 6 | SE 7 | SE 7 | SE 14 | SE 14 | SE 16 | SSE 13 | SSE 14 | SSE 16 | SSE 15 | SSE 15 | SSE 16 | SSE 16 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 4 | 5 | 5 | 5 | 5 | 7 | 6 | 21 | 98 | 112 | 116 | 52 | 131 | 128 | 52 | 51 | 64 | 120 | 138 | 102 | 199 | 196 | 532 | 724 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off |
High Tide | 8:47PM1.39m | 7:39AM1.35m | 9:18PM1.38m | 8:36AM1.27m | 9:50PM1.36m | 9:44AM1.18m | ||||||||||||||||||
Low Tide | 2:15AM0.83m | 2:27PM0.29m | 3:05AM0.76m | 3:07PM0.44m | 4:01AM0.69m | |||||||||||||||||||
 |  | | |  |  | |  | |  | | | | | | |  | |  | | | | | | |
 | — | — | — | 4:31 | — | — | — | — | — | — | — | 4:31 | — | — | — | — | — | — | — | 4:33 | — | — | — | — |
 | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — | — | 6:59 |
mm | 1 | 1 | 2 | 1 | — | — | — | 1 | — | — | 1 | 1 | 1 | 1 | 2 | 4 | 6 | 5 | 6 | 1 | — | — | — | — |
Temp °C | 24 | 23 | 22 | 22 | 22 | 23 | 24 | 23 | 23 | 23 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 |
Feels °C | 25 | 24 | 23 | 23 | 24 | 25 | 25 | 24 | 24 | 25 | 23 | 23 | 22 | 22 | 22 | 22 | 21 | 19 | 19 | 17 | 17 | 17 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | SE 10 | S 4 | S 4 | SE 10 | SE 10 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 7 | SE 7 | SE 7 | SE 7 | SSE 13 | SSE 14 | SE 12 | SSE 15 | SSE 15 | SSE 16 | SSE 16 |
| kJ | 4 | 4 | 4 | 4 | 5 | 3 | 4 | 4 | 37 | 53 | 57 | 52 | 56 | 57 | 46 | 47 | 36 | 120 | 138 | 75 | 199 | 196 | 532 | 724 |
Swell 2 Height (m) Direction Period (s) | S 5 | SW 6 | SE 8 | SE 11 | SE 10 | SE 10 | SW 6 | SE 10 | SE 10 | SE 15 | SSE 15 | SSE 14 | SE 15 | SE 15 | SE 14 | SE 14 | SE 13 | SE 7 | SE 6 | SSE 16 | SE 12 | SE 12 | SSW 7 | SE 11 |
| kJ | 1 | 1 | 3 | 5 | 4 | 4 | 1 | 4 | 4 | 9 | 21 | 21 | 57 | 54 | 52 | 51 | 60 | 21 | 14 | 102 | 68 | 86 | 4 | 162 |
Swell 3 Height (m) Direction Period (s) | SW 6 | E 8 | E 8 | SW 6 | SE 11 | S 13 | SW 6 | SE 8 | S 16 | SE 10 | S 9 | SSE 17 | SW 6 | SW 6 | SSE 17 | SSE 16 | SE 16 | SW 7 | S 7 | SE 6 | SE 6 | SSE 18 | ESE 7 | SW 7 |
| kJ | 1 | 5 | 5 | 1 | 5 | 4 | 1 | 3 | 5 | 4 | 2 | 30 | 2 | 2 | 30 | 27 | 64 | 2 | 1 | 10 | 6 | 126 | 4 | 7 |
Wind waves Height (m) Direction Period (s) | SSE 3 | SSE 4 | S 4 | S 4 | — | SSE 4 | SSE 4 | SSE 5 | SE 6 | SE 6 | SE 6 | — | SE 7 | SE 7 | — | — | WSW 6 | — | N 3 | N 3 | N 3 | N 3 | N 4 | NNE 4 |
| kJ | 3 | 5 | 5 | 5 | — | 7 | 6 | 21 | 98 | 112 | 116 | — | 131 | 128 | — | — | 4 | — | 2 | 4 | 7 | 11 | 28 | 22 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 76 | 77 | 77 | 76 | 76 | 77 | 491 | 249 | 249 | 6 | 6 | 0 | 0 | 0 | 0 | 8 | 12 | 64 | 51 | 145 | 136 | 145 | 145 | 145 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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