Surf Forecasts:
How big are the waves at Rock Island today (21 Jul):
- Morning surf: Morning surf (21 Jul, local time) - 0.5ft (0.2m), 8s period with SSE swell.
- Afternoon surf: Afternoon surf (21 Jul, local time) - 2ft (0.6m), 4s period with SSW swell.
- Evening surf: Evening surf (21 Jul, local time) - 2.5ft (0.7m), 4s period with SSW swell.
The current surf forecast for Rock Island at 12PM is: 0.2m 11s primary swell from a East-southeast direction and 0.2m 8s secondary swell from a South-southeast direction, 0.1m 11s secondary swell from a East direction, 0.4m 3s secondary swell from a South-southwest direction (forecast issued at 08:00am July 21). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jul) | 0.5ft (0.2m) | 8s |
| Afternoon (21 Jul) | 2ft (0.6m) | 4s |
| Evening (21 Jul) | 2.5ft (0.7m) | 4s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 10mm), heaviest on Thu night. Warm (max 32°C on Thu morning, min 27°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||
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 | |
Swell Height Map |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSE 8 | SSE 8 | ESE 11 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | SW 4 | SW 4 | SSW 4 | S 3 | SSW 4 | SSW 4 | SSW 4 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSE 10 | SSE 10 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 6 | 6 | 12 | 12 | 18 | 20 | 15 | 21 | 14 | 9 | 6 | 5 | 8 | 13 | 11 | 33 | 15 | 15 | 12 | 12 | 10 | 10 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | glassy | cross | cross-on | on | on | on | on | on | glassy | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on |
High Tide | 9:03AM1.27m | 9:33PM1.40m | 10:14AM1.18m | 10:05PM1.39m | 11:48AM1.12m | |||||||||||||||||
Low Tide | 3:12AM0.65m | 3:07PM0.59m | 4:07AM0.58m | 3:45PM0.75m | 5:11AM0.52m | 4:29PM0.91m | ||||||||||||||||
 | | |  | |  |  | | | | | | | | | | | | | |  | | |
 | 4:41 | — | — | — | — | — | — | 4:41 | — | — | — | — | — | — | — | 4:43 | — | — | — | — | — | — |
 | — | — | — | — | 6:53 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 |
Temp °C | 27 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 28 | 29 | 32 | 31 | 30 | 28 |
Feels °C | 31 | 33 | 31 | 31 | 31 | 31 | 33 | 33 | 33 | 34 | 32 | 31 | 31 | 33 | 32 | 34 | 32 | 32 | 35 | 34 | 34 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 4 | SSE 8 | SSE 8 | SE 8 | S 8 | S 8 | SE 8 | SSW 4 | SSW 4 | SSW 4 | SE 8 | SE 8 | SE 11 | SE 11 | SE 11 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSE 10 | SSW 6 | S 5 |
| kJ | 3 | 6 | 6 | 3 | 1 | 1 | 2 | 11 | 7 | 3 | 2 | 2 | 5 | 5 | 5 | 12 | 11 | 12 | 12 | 10 | 6 | 4 |
Swell 2 Height (m) Direction Period (s) | SSE 8 | E 11 | E 11 | SE 11 | E 11 | SE 11 | SE 11 | SE 8 | SE 8 | SE 8 | S 11 | SE 11 | SE 8 | SE 8 | SE 7 | SSW 6 | SE 10 | SSE 10 | SSE 10 | S 8 | SSE 10 | SSE 10 |
| kJ | 6 | 2 | 2 | 5 | 2 | 5 | 4 | 2 | 2 | 2 | 2 | 5 | 2 | 2 | 2 | 4 | 4 | 10 | 10 | 1 | 10 | 10 |
Swell 3 Height (m) Direction Period (s) | SE 11 | S 7 | ESE 11 | ESE 11 | E 11 | E 11 | — | SE 11 | E 11 | SE 11 | E 10 | SE 11 | SE 11 | SE 7 | SE 7 | SE 11 | SE 20 | SE 19 | S 19 | S 19 | SE 8 | S 7 |
| kJ | 5 | 1 | 12 | 12 | 9 | 9 | — | 5 | 2 | 4 | 2 | 4 | 5 | 2 | 2 | 4 | 15 | 15 | 7 | 7 | 3 | 1 |
Wind waves Height (m) Direction Period (s) | SW 4 | SSW 4 | SSW 3 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | SW 4 | SW 4 | SSW 4 | S 3 | SSW 4 | SSW 4 | SSW 4 | SW 6 | — | — | — | SSW 6 | S 3 | — |
| kJ | 4 | 1 | 3 | 11 | 18 | 20 | 15 | 21 | 14 | 9 | 6 | 5 | 8 | 13 | 11 | 33 | — | — | — | 12 | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 76 | 76 | 77 | 1507 | 534 | 76 | 76 | 76 | 16 | 55 | 1424 | 1434 | 811 | 77 | 76 | 0 | 38 | 16 | 16 | 74 | 51 | 51 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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