Surf Forecasts:
How big are the waves at Rock Island today (21 Jun):
- Morning surf: Morning surf (21 Jun, local time) - 5ft (1.5m), 6s period with SSW swell.
- Afternoon surf: Afternoon surf (21 Jun, local time) - 6ft (1.9m), 6s period with SSW swell.
- Evening surf: Evening surf (21 Jun, local time) - 4ft (1.2m), 7s period with SSW swell.
The current surf forecast for Rock Island at 12PM is: 1.1m 6s primary swell from a South-southwest direction and 0.2m 11s secondary swell from a South-southeast direction, 0.1m 9s secondary swell from a Southeast direction (forecast issued at 08:00am June 21). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jun) | 5ft (1.5m) | 6s |
| Afternoon (21 Jun) | 6ft (1.9m) | 6s |
| Evening (21 Jun) | 4ft (1.2m) | 7s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Warm (max 27°C on Sun afternoon, min 19°C on Mon night). Winds decreasing (fresh winds from the N on Sun night, light winds from the S by Tue afternoon). | ||||||||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | Wed 24 | |||||||||||||||||||||
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 | 6 PM | 9 PM | 12 AM | 3 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | S 5 | SSW 6 | SSW 6 | SSW 6 | SW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 6 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SE 11 | SSE 11 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 79 | 136 | 89 | 266 | 521 | 143 | 125 | 80 | 53 | 27 | 33 | 19 | 10 | 10 | 10 | 10 | 12 | 13 | 13 | 12 | 12 | 12 | 19 | 23 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | off | off | off | off | off | off | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-on | cross-on | cross-off | cross-off |
High Tide | 8:05AM1.28m | 10:04PM1.33m | 9:12AM1.19m | 10:40PM1.32m | 10:34AM1.11m | 11:18PM1.31m | ||||||||||||||||||
Low Tide | 3:02PM0.31m | 3:53AM0.80m | 3:47PM0.46m | 4:58AM0.71m | 4:37PM0.61m | |||||||||||||||||||
 | |  | |  |  | |  | | | |  | |  | | |  | | | | | | | | |
 | 4:26 | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 |
 | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 7:00 | — | — | 7:00 |
mm | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | 1 | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 24 | 27 | 26 | 23 | 22 | 21 | 21 | 22 | 23 | 23 | 21 | 20 | 19 | 19 | 19 | 19 | 20 | 22 | 21 | 21 | 20 | 19 |
Feels °C | 23 | 26 | 26 | 28 | 27 | 19 | 19 | 19 | 19 | 21 | 24 | 22 | 21 | 20 | 19 | 18 | 17 | 17 | 19 | 22 | 22 | 22 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 9 | S 5 | SSE 11 | SE 11 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 8 | S 6 | SSE 10 | S 6 | SSE 10 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SE 11 | SSE 11 |
| kJ | 3 | 58 | 12 | 5 | 217 | 143 | 125 | 80 | 53 | 27 | 33 | 9 | 7 | 10 | 7 | 10 | 12 | 13 | 13 | 12 | 12 | 12 | 19 | 23 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 9 | SE 9 | SE 9 | SE 9 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | S 7 | SSE 10 | SSE 10 | SSE 10 | SSW 7 | SSE 10 | S 6 | S 6 | S 6 | S 6 | S 6 | S 6 | S 6 | S 6 | SW 14 |
| kJ | 5 | 3 | 3 | 3 | 3 | 8 | 10 | 10 | 10 | 14 | 10 | 10 | 10 | 5 | 10 | 3 | 3 | 2 | 3 | 3 | 1 | 1 | 1 | 8 |
Swell 3 Height (m) Direction Period (s) | E 10 | SE 11 | E 18 | E 10 | SE 11 | SE 11 | NNE 2 | NNE 3 | E 16 | SSE 10 | E 10 | E 10 | SSW 8 | S 6 | SW 8 | SW 7 | SW 7 | SW 6 | S 10 | — | S 10 | S 15 | S 15 | S 9 |
| kJ | 2 | 5 | 6 | 7 | 5 | 5 | 1 | 1 | 5 | 10 | 8 | 2 | 6 | 3 | 2 | 2 | 2 | 2 | 2 | — | 2 | 5 | 4 | 2 |
Wind waves Height (m) Direction Period (s) | S 5 | SSW 6 | SSW 6 | SSW 6 | SW 7 | — | — | — | — | — | — | S 6 | SSE 3 | SE 3 | E 3 | NE 3 | NE 3 | NE 3 | NE 3 | — | — | — | — | — |
| kJ | 79 | 136 | 89 | 266 | 521 | — | — | — | — | — | — | 19 | 3 | 3 | 2 | 2 | 3 | 3 | 1 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 14 | 8 | 27 | 14 | 0 | 74 | 8 | 0 | 0 | 0 | 16 | 51 | 249 | 51 | 16 | 51 | 51 | 51 | 488 | 64 | 16 | 61 | 61 | 61 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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