Surf Forecasts:
How big are the waves at Rock Island today (23 Jul):
- Morning surf: Morning surf (23 Jul, local time) - 1.5ft (0.4m), 6s period with SSW swell.
- Afternoon surf: Afternoon surf (23 Jul, local time) - 1.5ft (0.4m), 6s period with SSW swell.
- Evening surf: Evening surf (23 Jul, local time) - 0.5ft (0.2m), 10s period with SSE swell.
The current surf forecast for Rock Island at 5AM is: 0.9m 6s primary swell from a Southwest direction and 0.5m 5s secondary swell from a South direction, 0.2m 6s secondary swell from a South-southwest direction (forecast issued at 02:00am July 23). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Jul) | 1.5ft (0.4m) | 6s |
| Afternoon (23 Jul) | 1.5ft (0.4m) | 6s |
| Evening (23 Jul) | 0.5ft (0.2m) | 10s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 10mm), heaviest on Sat night. Warm (max 32°C on Thu morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SSW 5 | SW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SE 11 | SE 11 | SE 11 | SSE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 17 | 46 | 8 | 15 | 12 | 12 | 10 | 10 | 12 | 12 | 12 | 12 | 12 | 11 | 18 | 18 | 18 | 10 | 15 | 15 | 15 | 15 | 15 | 15 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | off | cross-off | glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | on | on | cross-on | cross-on | cross-on | glassy | cross-off | off | cross-off | on | on | cross-off |
High Tide | 10:05PM1.39m | 11:48AM1.12m | 10:43PM1.38m | 1:49PM1.13m | 11:30PM1.38m | 3:34PM1.21m | ||||||||||||||||||
Low Tide | 5:11AM0.52m | 4:29PM0.91m | 6:22AM0.44m | 5:30PM1.04m | 7:33AM0.35m | 7:05PM1.13m | ||||||||||||||||||
 | |  | | | | |  | | |  |  | | | | | | | | | | |  |  | |
 | — | 4:43 | — | — | — | — | — | — | — | 4:43 | — | — | — | — | — | — | — | 4:43 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 |
Temp °C | 28 | 29 | 28 | 30 | 32 | 30 | 30 | 29 | 28 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 25 | 25 | 27 | 28 | 27 | 27 |
Feels °C | 31 | 33 | 31 | 33 | 36 | 32 | 33 | 34 | 31 | 29 | 30 | 31 | 31 | 30 | 31 | 30 | 31 | 33 | 27 | 27 | 31 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SE 10 | SSW 6 | S 5 | S 5 | S 5 | SSE 9 | SSW 6 | SSW 6 | SSW 7 | SE 11 | SE 11 | SE 11 | SSE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 |
| kJ | 5 | 18 | 8 | 12 | 12 | 4 | 6 | 5 | 4 | 2 | 9 | 4 | 4 | 5 | 18 | 18 | 18 | 10 | 15 | 15 | 15 | 15 | 15 | 15 |
Swell 2 Height (m) Direction Period (s) | S 7 | SE 11 | SSW 6 | SSE 10 | SSE 10 | S 8 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | S 7 | SSE 9 | SSE 9 | SSE 9 | SSW 7 | SE 16 | SE 16 | SSE 3 | S 7 | SE 16 | SE 16 | SE 16 | SE 16 | SE 15 |
| kJ | 1 | 4 | 4 | 10 | 10 | 1 | 10 | 10 | 9 | 9 | 4 | 8 | 8 | 8 | 5 | 10 | 10 | 1 | 4 | 10 | 10 | 10 | 10 | 9 |
Swell 3 Height (m) Direction Period (s) | SE 7 | S 20 | SE 10 | SE 19 | S 19 | S 19 | S 8 | S 7 | SE 18 | SE 18 | SE 18 | SE 18 | SE 18 | SE 17 | SE 16 | SW 7 | SW 7 | SE 16 | SE 16 | S 7 | S 7 | S 7 | S 8 | S 8 |
| kJ | 2 | 7 | 4 | 15 | 7 | 7 | 1 | 1 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 2 | 2 | 10 | 10 | 1 | 1 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | SSW 5 | SW 6 | — | — | — | SSW 6 | S 3 | — | — | — | — | — | — | — | SSE 3 | SSE 3 | SSE 3 | SE 4 | — | — | — | SSE 3 | SSE 3 | SSE 3 |
| kJ | 17 | 46 | — | — | — | 12 | 3 | — | — | — | — | — | — | — | 2 | 2 | 1 | 2 | — | — | — | 1 | 2 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 798 | 92 | 76 | 0 | 38 | 16 | 16 | 51 | 51 | 51 | 51 | 51 | 51 | 74 | 249 | 18 | 64 | 38 | 38 | 16 | 55 | 18 | 18 | 18 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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